7.What is the chemical formula for Beryllium Nitride? *

Answers

Answer 1

Answer:

BE3N2

Explanation:


Related Questions

. The four metals, Strontium(Sr), Francium (Fr), Yttrium (Y), and Europium (Eu), in separate experiments, are dipped in aqueous solutions of SrNO3, FrNO3, Y(NO3)3, and Eu(NO3)2. The following results are obtained: 1. Yttrium metal does not react with any of the solutions 2. Strontium metal reacts with all of the other metals solutions 3. Francium metal reacts in a solution of Eu(NO3)2 a) List the four oxidizing agents in order from strongest to weakest by creating a small reduction table. Explain your reasoning below b) List the four reducing agents in order from strongest to weakest

Answers

Answer:

a) Y³⁺ > Eu²⁺ > Fr⁺ > Sr²⁺

b) Sr > Fr > Eu > Y

Explanation:

Y is the least reactive metal because it does not react with any of the other solutions.

Sr is the most reactive metal because it reacts with all of the other solutions.  

Sr + 2Fr⁺ ⟶Sr²⁺ + 2Fr

3Sr + 2Y³⁺ ⟶ 2Sr²⁺ + 2Y

Sr + Eu²⁺ ⟶ Sr²⁺ + Eu

Fr is more reactive than Eu because it reacts with Eu(NO₃)₂.

2Fr + Eu²⁺ ⟶ 2Fr⁺ + Eu

The order of reactivity is

Sr > Fr > Eu > Y

b) Reducing agents

In each of the above reactions. the more reactive metal is acting as a reducing agent — it is donating electrons to the cation of the other metal.

Thus, the order of activity of reducing agents is

Sr > Fr > Eu > Y

a) Oxidizing agents

The metal cations are the oxidizing agents.

The order of reactivity of the oxidizing agents is the reverse order of the reducing agents

Y³⁺ > Eu²⁺ > Fr⁺ > Sr²⁺

c) Standard reduction potential table

See the image below.

 

HELP PLEASEE 100 POINTS
The Quiver tree grows in Southern Africa. Which of the following plant adaptations is likely to prevent these trees from dying out due to rising desert temperatures?
O Releasing a black powder onto their trunk to absorb more heat from sunlight
O Shifting their growing range towards the equator
Ability to store water in leafy structures to prevent excess evaporation
O Limiting seed dispersal to nearby locations
PLEASE HELP 100 POINTS !!

Answers

Answer:

Shifting their growing range towards the equator

Explanation:

Maybe will be like that

Answer:

Ability to store water in leafy structures to prevent excess evaporation.

Explanation:

The reason why plants die in hot temperature is the excess evaporation of water, so to prevent the excess evaporation of water, the plants get adaptive to store water in their leaves.

Hope it helps.

ON A TIMER!!! PLZ HELP ME!!!
Consider the reaction below. *Image* Which is the net ionic equation for the reaction?

Answers

Answer:

C2H3O2^-(aq) + H^+ —> HC2H3O2

Explanation:

The following equation was given in the question:

Na^+ + C2H3O2^-(aq) + H^+ Cl^- —> Na^+ + Cl^- + HC2H3O2

Now, to obtain the net ionic equation, we simply cancel out the ions common to both side of the equation.

A careful observation of the equation above, shows that sodium ion, Na^+ and chloride ion, Cl^- are common to both side of the equation.

Therefore, to obtain the net ionic equation, we simply cancel out Na^+ and Cl^- from both side of the equation. This is illustrated below:

Na^+ + C2H3O2^-(aq) + H^+ Cl^- —> Na^+ + Cl^- + HC2H3O2

C2H3O2^-(aq) + H^+ —> HC2H3O2

Therefore, the net ionic equation is

C2H3O2^-(aq) + H^+ —> HC2H3O2

What was the plum-pudding atomic model? A. A description of atoms being balls of positive charge with electrons scattered outside B. A description of electrons orbiting the nucleus of the atom C. A description of electrons scattered inside the atom D. A description of negative charges being suspended between balls of positive charge

Answers

Answer:

C

Explanation:

plum- pudding atomic model is an atom that had a positively charged medium, or space, with negatively charged electrons inside the medium.

The correct answer is (A) A description of atoms being balls of positive charge with electrons scattered outside.

What is plum pudding atomic model? The plum pudding atomic model was proposed by JJ Thomson.This atomic model had electrons embedded with positive charge.The plums were negatively charged electrons the pudding were the positively-charged protons.

Why other options are incorrect?

Option (A) is correct because the atom was a sphere of positive charge with negatively charged electrons scattered around the atom like plums in a pudding.

So , Rest  options that are B , C and D are incorrect.

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What is cationic and anionic polymers?

Answers

Answer:

Explanation:

Anionic polymerization and cationic polymerization are two types of chain growth polymerization reactions which are used to synthesize various types of polymers. Both these reactions have the same reaction mechanism, but the reaction initiator is different. Anionic polymerization reactions are initiated by an active anionic species, whereas the cationic polymerization reactions are initiated by an active cationic species.

hope this helps

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how many atoms altogether make up one molecule of glucose ​

Answers

Answer:

24 atoms makes altogether a molecule of glucose

What can you infer about the results of numerical models in 1966 for polar caps
made of water ice?

Answers

Answer:

that by living near the poles, people might be able to survive on Mars

Explanation:

CALCULATE THE VOLUME OF 16 g OF OXYGEN GAS AT S.T.P?

Answers

Answer:

To calculate the volume we must first find the number of moles

Number of moles (n ) = mass / Molar mass (M)

Since oxygen is diatomic

M of oxygen = 16 × 2 = 32g/mol

n = 16 / 32 = 0.5mol

Next we use the formula

V = n × V(dm³)

where V is the volume

V(dm³) is the volume of 1 mole of a substance at s.t.p which is

22.4dm³

Volume of oxygen gas at s.t.p is

0.5 × 22.4dm³

= 11.20dm³

Hope this helps you

The production of water proceeds according to the following equation.
2H2(g) + O2(g) → 2H2O(g)
Which describes a way to speed up the collisions between hydrogen and oxygen molecule:
Use a less-intense source of heat on the reactants.
Maintain the same temperature of the reactants.
Place the reactants in a smaller container.
Reduce the concentration of the reactants.

Answers

Answer:

Place the reactants in a smaller container.

Explanation:

If you were to reduce the source of heat, the hydrogen and oxygen molecules would lose their kinetic energy, resulting in less collisions.

_______________________________________________________

Maintaining the same temperature of the reactants, the speed would neither increase nor decrease as temperature is directly proportional to the kinetic energy of the molecules, which in turn is directly proportional to the number of collisions. However, placing the reactants in a smaller container would result in less volume, and hence the molecules would collide with one another more often!

Hope that helps!

The primary requirement of a reaction to occur is that the reactant particles must collide and interact with each other in some way. Place the reactants in a smaller container which speed up the collisions between hydrogen and oxygen molecule. The correct option is C.

What is collision theory?

The collision theory states that the rate of a chemical reaction is proportional to the number of collisions between the reactant molecules. The more often reactant molecules collide, the more often they react with one another and faster will be the reaction rate.

If we reduce the source of heat, the hydrogen and oxygen molecules would lose their kinetic energy, resulting in less collisions. The temperature is directly proportional to the kinetic energy of the molecules, which in turn is directly proportional to the number of collisions.

If we place the reactants in a smaller container it would result in less volume, and hence the molecules would collide with one another more often.

Thus the correct option is C.

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Which topic is commonly used to explain activation energy and how chemical reactio
reaction rate
collision theory
velocity distribution
spontaneous reaction

Answers

Answer:

The answer is collision theory

I hope this helps you.

DETAILED Description on the applications of Nanochemistry.... about 100 words for each( note: has to be detailed)

Answers

Answer:

Explanation:

Nanochemistry is a branch of nanoscience, deals with the chemical applications of nanomaterials in nanotechnology.

Nanochemistry involves the study of the synthesis and characterisation of materials of nanoscale size.

why does bromine not react with sulphur?​

Answers

Answer:

The thermodynamic parameter which is of significance in this case is the 'Reduction Potential' for molecular bromine which is ~ +1.1 v vs N.H.E. In other words, it is a strong oxidizing agent. The bromine will oxidize sulfur compounds in which the valence of sulfur is lower than six to sulfate.

There are many possible reactions. Here is one possible example:

Na2 S2O3 + 4Br2 + 5 H2O = 2NaHSO4 + 8 HBr

Answer:

because bromine doesn't have a reaction channel on Yootube.

Explanation:

Speaks for itself.

A group of students conducts an experiment to test the amount of sugar that can be dissolved in water at 50°F, 100°F, and 200°F.

Which suggestion will help increase confidence in the result?

A. Michael suggests timing each addition of sugar
B. Ali suggests using her hand to verify the temperature of the water
C. Joel suggests testing salt along with sugar to see if they dissolve at different speeds
D. Zander suggests that each student complete an experiment individually and compare results​

Answers

Answer:

A. Michael suggests timing each addition of sugar

Explanation:

The experiment is about amount of sugar dissolved at different temperatures. The suggestion of Michael is best suited to record the timing of each addition of sugar. This will enable to record the timing of sugar added in the water and amount of sugar dissolved at the specified temperature.

Production of synthetic fibers helps in the conservation of forests comment

Answers

Answer:

Explanation:

Synthetic fibres are made using chemicals. Hence they do not require any forest resources like wood. This helps in saving the trees from cutting down. So the production of synthetic fibers helps in the conservation of forests.

Natural fibres on the other hand require forest products like wood for its manufacture.

Hope this helps

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Answer:

yes, they do help in conservating the forest resources.

Explanation: This is because synthetic fibers like rayon, nylon etc are made from petrochemicals which helps to substitute usage of natural resources like cotton etc. and these synthetic fibers are more durable than natural fibers, which adds to their usage and in turn, helps to conserve forest resources.

PLEASE HELP RIGHT AWAY!! THANK YOU :)
Copper turns a green-brown when it is exposed to oxygen in air. What chemical property of oxygen causes this effect?

A). its reactivity

B). its mass

C). its flammability

D). its volume

Answers

Answer:

The answer is option A.

its reactivity

I hope this helps you.

Answer:

A) Reactivity

Explanation:

Reactivity is one of the characteristics of a chemical property. The copper that turned color due to air, has a different chemical composition.

It wouldn't be flammability - even though it is a chemical property, but nothing is burning.

All the other answer choises: mass and volume are physical properties. Basically the PHYSICAL characteristics which doesn't change the composition.

Hope this helps!

What would be the mass of Iron(II) chloride obtained when 450g of Sodium Chloride is added to Iron(II) oxide?

Answers

Answer:

FeO(s)+2NaCL(aq)>FeCL2(aq)+Na2O(s)

2 moles of sodium chloride react with 1 mole of iron (II) oxide to give 1 mole of iron (II) chlorine

mole ratio NaCl :FeCl=2:1

mass of FeCl=0.5×450=225g

Explanation:

(

18. An electric motor turns a belt that powers a pump. If this system is compared to the chemical reactions of the cell, which part represents
ATP?
the electric motor
the pump
the belt

Answers

Answer:

A. the electric motor

Explanation:

A cell is a biological molecule which is the basic and functional unit of life. Cells undergo series of processes to function appropriately. ATP is an acronym for adenosine triphosphate, which is the source of energy for various cell processes.

In the given mechanical system, the electric motor provides the energy required energy to drive the system. Therefore, the electric motor has the same major function of providing energy for the system as the ATP in a cell.

HURRY I'M ON A TIMER

A stovetop bumer on medium reaches 95°C. Which other object will receive a flow of heat directly from the burner?
the surrounding air
a burner at the same temperature
a pan heated to 100°C
hotter water inside a pan​

Answers

Answer:the surrounding air

Explanation:

A burner at the sanem temperature would not receive a flow of heat, a pan heated to 100 degrees will transfer heat to the stovetop, and hotter water inside a pan will not take the heat either because it is hotter. the surrounding air is colder and will take heat from the burner

Answer:

surrounding air

Explanation:

taking test too

What is the percent yield of ferrous sulfide if the actual yield is 220.0 g and the theoretical yield is 275.6 g? Use Percent yield equals StartFraction actual yield over theoretical yield EndFraction times 100.. 12.5% 55.6% 79.8% 87.9%

Answers

Answer:

79.8%

Explanation:

Percentage yield = actual yield / theoretical yield x 100%

Percentage yield = 220.0 / 275.6 x 100%

=79.8%

The percent yield of of ferrous sulfide if the actual yield is 220.0 g and the theoretical yield is 275.6 g is 79.8%.

What is percent yield?

Percent yield is defined as the ratio of actual yield to the theoretical yield multiplied by 100. If the actual and theoretical yield are same then the percent yield is 100%.If actual yield is less than the theoretical yield then the percent yield is less than 100%.Reason of this condition arising is the incompletion of reaction or loss of sample during recovery process.

In cases where percent yield is over 100% it indicates that more sample is recovered than the predicted amount.This condition arises when there are other simultaneous reactions taking place leading to the formation of product. It can also arise if there is incomplete removal of impurities from the sample .

In the given example, percent yield can be found out by substituting values in mentioned formula. percent yield,=220/275.6×100=79.8%.

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The atomic size of sodium is smaller than that of the sodium why?

Answers

Ummm I studied this but

Which produces oxygen-18 when it undergoes beta decay? A. oxygen-17 B. oxygen-18 C. fluorine-17 D. fluorine-18

Answers

Answer:

Option D. fluorine-18

Explanation:

The attached photo gives the explanation.

In the attached photo, A zX represent the atom that will undergo beta decay to produce oxygen–18.

After the calculation, A zX was found to be fluorine–18.

What volume of Co2 (carbon (iv) oxide)
will be produced when 10g of Na2Co3
(sodium trioxocarbonate (iv) reacted
with excess Hcl (Hydrogen Chloride) at
STP(Na=23, C=12, O=16)

Answers

Answer:

2.1056L or 2105.6mL

Explanation:

We'll begin by calculating the number of mole in 10g of Na2CO3. This can be obtained as follow:

Molar mass of Na2CO3 = (23x2) + 12 + (16x3) = 106g/mol

Mass of Na2CO3 = 10g

Mole of Na2CO3 =.?

Mole = mass /molar mass

Mole of Na2CO3 = 10/106

Mole of Na2CO3 = 0.094 mole

Next, we shall determine the number of mole CO2 produced by the reaction of 0.094 mole of Na2CO3. This is illustrated below:

Na2CO3 + 2HCl —> 2NaCl + H2O + CO2

From the balanced equation above,

1 mole of Na2CO3 reacted to produce 1 mole of CO2.

Therefore, 0.094 mole of Na2CO3 will also react to 0.094 mole of CO2.

Next, we shall determine the volume occupied by 0.094 mole of CO2 at STP. This is illustrated below:

1 mole of a gas occupy 22.4L at STP. This implies that 1 mole CO2 occupies 22.4L at STP.

Now, if 1 mole of CO2 occupy 22.4L at STP, then, 0.094 mole of CO2 will occupy = 0.094 x 22.4 = 2.1056L

Therefore, the volume of CO2 produced is 2.1056L or 2105.6mL

an element x atomic number 16 reacts with an element Y atomic number 20 to form a compound
i) position of the elements in the modern periodic table
ii) what type of bond will be formed between them ? give reason
iii) write the chemical formula of the compound ​

Answers

Answer:

Element x has an atomic number of 16, it is sulphur.

Element Y has an atomic number of 20, it is calcium.

i) Sulphur is in Group VI, period 3 in the modern periodic table,

whereas calcium is in Group II, period 4 of the modern periodic table.

ii) Ionic bonds will form between them. This is because metals and non-metals (Cacium and sulphur) usually form ionic compounds where between the ions are held by ionic bonds (which are transferred electrons so that both elements can attain a stable status).

iii) CaS

each Calcium atom can lose 2 electrons to attain 8 outermost shell electrons, while each sulphur atom can gain the 2 electrons to attain 8 outermost shell electrons, where they will most be stable (octet). Hence, the atomic ratio of Ca and S is 1:1.

i) The element with atomic number 16 is sulfur present in group 16 and period 3rd and the element with atomic number 20 is calcium present in group 2 and period 4th.

ii) The ionic bond formed between them.

ii) The chemical formula of the compound will be CaS.

What are ionic compounds?

Ionic compounds can be described as crystalline solids formed by closely packed ions of opposite charge. An Ionic compound is generally formed when metal reacts with non-metal.

In ionic compounds, the ions are commonly held together by ionic bonds. The ions are formed by gaining or losing electrons in order to achieve their nearest noble gas configuration.

In a reaction, the metals usually lose electrons to complete their octet while non-metals will gain electrons to complete their octet.

The given element calcium is a metal with a valency of +2 and sulfur is a non metal with a valency of -2. Therefore, they form an ionic compound with the chemical formula CaS.

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1. Which of these items wastes sound energy?
-car radio
-alarm clock
-washing machine
-smartphone

Answers

Answer:

washing machine

Explanation:

the sound from a washing machine is not beneficial in any way

A sample of gas (1.9 mol) is in a flask at 21 °C and 697 mmHg. The flask is opened and more gas is added to the flask. The new pressure is 795 mmHg and the temperature is now 26 °C. There are now __________ mol of gas in the flask.

Answers

Answer:

The new moles of the gas in the flask is 2.13 moles.

Explanation:

Given;

number of moles of gas, n = 1.9 mol

temperature of the gas, T = 21 °C  = 21 + 273 = 294 K

pressure of gas, P = 697 mmHg

volume of gas, V = ?

Apply ideal gas law;

PV = nRT

Where;

R is gas constant, = 62.363 mmHg.L / mol. K

V = nRT / P

V = (1.9 x 62.363 x 294) / 697

V = 49.98 L

New pressure of the gas, P = 795 mmHg

New temperature of the gas, T = 26 °C = 273 + 26 = 299 K

New moles of the gas, n = ?

Volume of the gas is constant because volume of the flask is the same when more gas was added.

n = PV / RT

n = (795 x 49.98) / (62.363 x 299)

n = 2.13 moles

Therefore, the new moles of the gas in the flask is 2.13 moles.

C AL= -4.184 × 39.85 × 4.7 ÷ 11.98 × (-72.9)

Answers

Answer:

4,768.57

Explanation:

If you are asking us to calculate, your answer is above. Easiest and fastest way is to plug it into the calc.

4,768.57 is what I think the answer is

What type of compound are carbon tetrachloride and boron trihydride?

Answers

Answer:

hydrocarbon

Explanation:

these are called hydrocarbons

Lactose (milk sugar) is a carbohydrate that is formed by combining galactose and glucose. Which term best describes this molecule? monosaccharide disaccharide monomer starch

Answers

Explanation:

lactose is disaccharide

because it contains 1 monosaccharide galactose +

1 monosaccharide glucose

The correct answer to the question is: disaccharide

Monosaccharides are simple sugar which can not be hydrolysed into simpler or smaller molecules.

Disaccharides are sugars produced by the condensation of two monosaccharides with the elimination of a water molecule.

monosaccharide + monosaccharide <=> Disaccharide + water

A Monomer is a small molecule which can combine with other similar molecules to form a large molecule called polymer. Thus, a monomer of starch is simply a small molecule that combines together to form a polysaccharide called starch. The monomer of starch is glucose.

Glucose and galactose combined to form lactose i.e

Glucose + Galactose => Lactose

The above is simply a demonstration of how disaccharides are produced.

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Name each of the following binary compounds or ionic compounds with polyatomic ions: 1. LiBr 2. Cal2 3. Al203 4. Mg3N2 5. FeCl2 6. FeCl3 7. Cu3N2 8. Ni2O3 9. Al(SO4)3 10. Ca3(PO4)2 11. Fe(OH)2 12. (NH4)2S 13. Na2O 14. NH3 15. SO42-

Answers

Answer:

Explanation:

1. LiBr   -      Lithium bromide

2. Cal₂   - Calcium iodide

3. Al₂0₃  - Aluminium oxide

4. Mg₃N₂  - Magnesium nitride

5. FeCl₂   Ferrous chloride [ Iron(II) chloride ]

6. FeCl₃   Ferric chloride   [ Iron(III) chloride ]

7. Cu₃N₂  Copper nitride

8. Ni₂O₃  Nickel(III) oxide

9. Al(SO4)₃ Aluminium sulphate

10. Ca₃(PO4)₂ Copper phosphate

11. Fe(OH)₂ Iron (II)  hydroxide

12. (NH4)₂S Ammonium sulphide

13. Na₂O   Sodium oxide

14. NH₃     Ammonia

15. SO₄²⁻  Sulphate ion

How many grams of AuCl2, if the compound has 6.3 x10^23 atoms of Cl?

Answers

Answer:

Total mass =  93.21 gram (Approx)

Step-by-step explanation:

Given:

Atoms of Cl = 6.3 × 10²³

Find:

Amount of AuCl₂

Computation:

Molecules of AuCl₂ = 6.3 × 10²³ / 2 = 3.15 × 10²³

1 mol of AuCl₂ = 6.022 × 10²³ molecules

Number of mol = 3.15 × 10²³ /  6.022 × 10²³

Number of mol  = 0.523 mol

So,

Molar mass of AuCl₂ = 267.87 g/mol

Total mass = 0.348 mol × 267.87 g/mol

Total mass =  93.21 gram (Approx)

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All materials within ecosystems can be recycled. Is it possible for a society to achieve equality without liberty? Explain. What is the slope of a line perpendicular to y=-7X?O A.4B.INNO c.4O D.PLZZZ HELP Which kind of economy system does a capitalist country have? 01:37:49The function f(x) = (x + 5)(x + 1) is shown.On a coordinate plane, a parabola opens down. It goes through (negative 5, 0), has a vertex at (negative 3, 4), and goes through (negative 1, 0).What is the range of the function?all real numbers less than or equal to 4all real numbers less than or equal to 3all real numbers greater than or equal to 4all real numbers greater than or equal to 3 Find the values of the variables and the measures of the angles THE IMAGE DOWN BELOW MATH PLEASE HELP ME WITH THIS ALEGEBRA IM CRYING YALL Instrumentos utilizados en efectos por cobrar Determine which type of merger has occurred for this scenario. GrillerTech manufactures propane grills for cooking. It wants to form a merger with Tinseltech, a party favor manufacturing company. This would be a __________ merger. mr rai bys a radio for rs 1880ans sell it to mr Sherpa at 20 percent .how much money does he pay for it CoolBreeze Manufacturing produces a single product, a tabletop fan. They reported the following information from their operations last period:___________. Cost of Direct Materials used in production: $50,000 Cost of Direct Labor wages: $37,500 Variable Manufacturing Overhead: $25,000 Fixed Manufacturing Overhead: $125,000 Total units produced: 10,000Under absorption costing what was the per-unit cost of the units produced? a. None of the above b. $23.75 c. $12.50 d. $11.25 e. $8.75 Click on the graphic to select the figure that would make the following a reflection in line k Which evidence from the passage answer this question How was blueberry growing changed In a school of 685 students, there are 385 students involved in sports teams, and there are450 involved with the music program. There are 87 students that are not involved in eitherprogram. There are some students involved in both programs.a) Draw a Venn diagram to represent this situation.b) Use the additive principle of non-mutually exclusive sets to determine the number ofstudents that are involved in both team sports and musicC) use the addictive principle for the probability of non-mutually exclusive events to determine the probability of a student being involved in team sports or involved in music Given: ABC, AC = BC, AB = 3 CD AB , CD = square root of 3 Find: AC What are the job prospects for students with either a bachelors degree, masters degree, or a doctoral degree in psychology? The IRS reports that the mean refund for a particular group of taxpayers was $1,600. The distribution of tax refunds follows a normal distribution with a standard deviation of $850.Required:a. What percentage of the refunds are between $1,600 and $2,000? b. What percentage of the refunds are between $900 and $2,000? c. What percentage of the refunds are between $1,800 and $2,000? d. Ninety-five percent of the refunds are for less than what amount? Please answer this question fast in two minutes A soccer team scores 12 points in 5 matches. They scored the same number of points in each of their first 3 matches and one more point in each of their last 2. How many points did they score in each match? Match each of the following terms associated with the control of heart rate and blood vessel diameter with its defining term (e.g., integrating center, receptors, and so on).a. Parasympathetic neurons b. Carotid and aortic baroreceptors c. SA node d. Veins e. Sympathetic neurons f. Arterioles g. Ventricles h. Change in blood pressure i. Medullary cardiovascular centers1. Integrating center 2. Efferent neurons 3. Receptors 4. Stimulus 5. Target