Answer:
Iconic, neutral, and cation
Explanation:
When a metal and a nonmetal react, the result is a(n) Ionic compound. Ratio of cat ions and anion depends on the ionic charge of each. All ionic compounds come together in the simplest ratio to make a neutral formula unit and the cation is always written first in the formula.
What is ionic compound ?The ionic compounds are solids in crystalline form and these are formed by opposite charged ion packing, formed by the reaction of metals react with non-metals.
Elements can either gain or lose electrons in order to achieve noble gas configuration and these formation of ions helps them gain stability, the structure of ionic compound depend on the relative sizes of the cations and anions.
Ionic compounds are salts, oxides, hydroxides, sulphides, and the inorganic compounds. Ionic solids are held together by the electrostatic attraction between the positive and negative ions.
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You are on an island and need freshwater to drink. Which process could you
use to separate the salt from ocean water and provide freshwater for
drinking?
O A. Distillation
B. Chromatography
C. Filtering
O D. Freezing
Answer:
A
Explanation:
The reason it is distillation is due to the fact that we can use distillation to heat the ocean water. As water has a lower boiling point than the salt solution, it evaporates and the salt stays behind.
Which commercial technology commonly uses plasmas?
O a radio
O a race car
O a television a microwave oven
The commercial technology that uses plasmas is C. A television.
What is plasma ?Plasma is a state of matter that is similar to gas, but the atoms are ionized, meaning that they have lost or gained electrons. Plasmas are used in a variety of commercial technologies, including:
Plasma TVs use plasma to create images. The plasma is contained in a thin layer of gas between two glass plates. When an electric field is applied to the plasma, it emits light. The color of the light depends on the type of gas used.
Plasma lamps are used in a variety of lighting applications, including streetlights, headlights, and backlighting for LCD displays.
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General Lab Questions: (8 points) 5. A) What is the main problem with precipitating strontium ions from the town's water using phosphate? Can you think of any reasons that your results might not be accurate?
Answer:
1) high pH is required
2) other ions are precipitated along with the strontium ions
Explanation:
According to the solubility rules all phosphates are insoluble except those of sodium, potassium, and ammonium. This implies that strontium phosphate is insoluble in water. This explains why strontium ions can be precipitated from drinking water supply using phosphate. The main problem with the precipitation of strontium using phosphate is that it usually requires a high pH as the precipitation occurs under very alkaline conditions.
The main reason why the results may not be accurate is that other ions are precipitated along with the strontium such as calcium ions and magnesium ions. This may lead to inaccurate determination of the amount of strontium ions present.
Answer:
Explanation:
The fundamental issue for precipitation of Strontium Phosphate, is that the other metal cations (Calcium, Barium, Iron, and so on.), present in the town water, are likewise encouraged as Phosphate. In this manner, alongside Strontium Phosphate, Phosphates of a few different cations are additionally encouraged. In this way, Strontium Phosphate can't be weighed precisely. This will prompt off base outcomes.
The response will be Exothermic, if the temperature of response increments.
C AL= -4.184 × 39.85 × 4.7 ÷ 11.98 × (-72.9)
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.
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
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!
Define an element?
Answer:
In CHEMISTRY: an element is a pure substance which cannot be broken down by any chemical means, consisting of atoms which have identical numbers of protons in their atomic nuclei.e.t.c.
Explanation:
Answer:
Element is a pure substance which cannot be splitted into smaller substances by simple chemical processes.
how many hydrogen atoms do you have four molecules of glucoes
Molecules of glucose (blood sugar) contain 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms.
Hope this helped :)
When a gas is put in a container it...
a. does not change shape.
b. fills up the container.
c. fills up the container and fills it up top to bottom.
Answer:
c.is the answer..not sure...but i think so
Which process is a chemical change? burning a match boiling water melting ice breaking glass
Answer:
Burning a match
Explanation:
A chemical change is where a substance is changed into one or more substances. Basically, a chemical change changes the form of a substance. While, a physical change such as ripping a piece of paper in half will still be a paper just in half(nothing is changed).
Hope this helps!!! PLZ MARK BRAINLIEST!!!
Combustion is a chemical reaction that often involves the presence of oxygen and produces heat and light in the form of flames. Burning a match is a chemical change. Therefore, option A is correct.
What is combustion ?A fuel and an oxidant, typically atmospheric oxygen, engage in a high-temperature exothermic redox chemical reaction known as combustion, or burning, which results in the production of oxidized, frequently gaseous products in a mixture known as smoke.
Burning is sometimes referred to as combustion. Fuel is burned and interacts with oxygen in a combustion reaction to produce energy.
A fuel and an oxidant, often atmospheric oxygen, engage in a high-temperature exothermic (heat-releasing) redox (oxygen-adding) chemical reaction during combustion that results in oxidized, frequently gaseous products in a mixture known as smoke.
Thus, option A is correct.
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What marine province contains deep ocean trenches that form along convergent plate boundaries as a result of subduction?
A. Mid-ocean ridge
B. Deep ocean basin
C. Abyssal plain
. Continental margin
Answer:
A.Mid ocean ridge i think
Explanation:
your answer is B my guy
A 3.00 L cylinder at 25 degrees Celsius contains a mixture of 3 gases: He, N2, and Ar at partial pressures of 115, 285, and 325 torr, respectively. If all the He is removed from the mixture and the temperature does not change, what will be the partial pressure, in torr, of the N2
Answer:
[tex]P_{N_2}=285 torr[/tex]
Explanation:
Given that
Volume of cylinder = 3 L
Temperature= 25 degrees
Partial pressure of the gases
[tex]P_{He}=115 torr[/tex]
[tex]P_{N_2}=285 torr[/tex]
[tex]P_{Ar}=325 torr[/tex]
By using Dalton's law , the total pressure of the non reacting gas is the sum of the partial pressure of all gases.
[tex]P_{total}=P_{He}+P_{N_2}+P_{Ar}[/tex]
[tex]P_{total}=115+285+325=725 torr[/tex]
When all the He gas will removed then partial pressure of He will be zero.
[tex]P_{total}=P_P_{N_2}+P_{Ar}[/tex]
[tex]P_{total}=285+325=610 torr[/tex]
Partial pressure of N₂
[tex]P_{N_2}=610-325=285 torr[/tex]
[tex]P_{N_2}=285 torr[/tex]
Production of synthetic fibers helps in the conservation of forests comment
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
plz mark it as brainliest!!!!!!!!!
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.
Identify the missing numbers below to show the result of dividing the numbers 5.6 x 10^12 / 3.5 x 10^9 = A x 10^B
Answer:
A = 1.6
B = 3
Explanation:
When you are dividing exponents, you subtract them:
10^12 / 10^9 = 12 - 9 = 3
10³ would be the exponent
5.6/3.5 = 1.6
So, 1.6(10³) would be your answer.
What type of compound are carbon tetrachloride and boron trihydride?
Answer:
hydrocarbon
Explanation:
these are called hydrocarbons
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%
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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how many moles of water (H2O) would be produced from the reaction of 3.25 moles of hydrochloric acid (HCL) reacting with excess calcium hydroxide (Ca(OH)2)
Answer:
3.25 moles of H2O
Explanation:
We'll begin by writing the balanced equation for the reaction. This is given below:
2HCl + Ca(OH)2 —> CaCl2 +2H2O
Now, we can obtain the number of mole H2O produced from the reaction as follow:
From the balanced equation above,
2 moles of HCl reacted to produce 2 moles of H2O.
Therefore, 3.25 moles of HCl will also react to produce 3.25 moles of H2O.
Therefore, 3.25 moles of H2O were produced from the reaction.
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Consider the reaction below. *Image* Which is the net ionic equation for the reaction?
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
Which produces oxygen-18 when it undergoes beta decay? A. oxygen-17 B. oxygen-18 C. fluorine-17 D. fluorine-18
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 is the name of the process used in the industrial preparation of tetraoxosulphate VI acid
Answer:
haaaaaaaaaaaaaaaaaaaaaa
Answer:
Contact process
Explanation:
commercially,tetraoxosulphate Vl acid is prepared by the contact process
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
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.
How many grams of AuCl2, if the compound has 6.3 x10^23 atoms of Cl?
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)
how many atoms altogether make up one molecule of glucose
Answer:
24 atoms makes altogether a molecule of glucose
How are energy and work related? A. Energy is the force needed to do work B. Work times energy is force C. Energy is the capacity to do work D. Work and energy are the same
Answer:
I believe the answer is A
Explanation:
Work and energy are related because when you work, you cause displacement in the object you are exerting upon. While this happens, you transfer energy between the systems. Both work and energy share the same SI unit, called the joule.
What type of organism secretes calcium carbonate plates that overlap to form a spherical test?
A. Coccolithophores
B. Decomposers
C. Dinoflagellates
D. Diatoms
Answer:
A. Coccolithophores
Explanation:
Coccolithophores are organisms that are single-celled, and secret calcium carbonate plates. They produce calcium carbonate plates that is referred to as coccoliths.
These organisms absorb carbon dioxide during the production of their food. After its death, the calcium carbonate can be collected from the remains. Therefore causing an increase generally in the carbon deposits.
Answer:
A. Coccolithophores
Explanation:
Coccolithophores Create a calcium carbonate plating that protects the cell's surface. This action is called spherical coating.
A metal strip reacts slowly when placed in a light blue solution, and much faster when placed in a dark blue solution at the same temperature. Using the collision theory, explain this phenomenon.
Answer:
Increase in the color intensity and hence the concentration of the reacting species increases the rate of the reaction according to collision theory
Explanation:
The given parameters are;
Rate of reaction of metal strip in light blue solution lesser than rate of reaction of the metal strip in dark blue solution
Therefore, the color of the solution derives from the concentration of the reacting species involved in the reaction.
The increase in the darkness of the blue solution stems from the increase in the concentration of the reacting species which according to collision theory increases the fraction of the effective collisions, thereby increasing the reaction rate.
What can you infer about the results of numerical models in 1966 for polar caps
made of water ice?
Answer:
that by living near the poles, people might be able to survive on Mars
Explanation:
What would be the mass of Iron(II) chloride obtained when 450g of Sodium Chloride is added to Iron(II) oxide?
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:
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zinc is very essential element for human body, why? give reason.
Answer: Function
Explanation: Zinc is found in cells throughout the body.
It is needed for the body's defensive (immune) system to properly work.
It plays a role in cell division, cell growth, wound healing, and the breakdown of carbohydrates.
Temperature of the water to the nearest degree?
Based on the thermometer reading, the temperature of the water to the nearest degree is 2°C.
What is temperature?Temperature is a measure of the degree of coldness or hotness of a substance.
Temperature is measured using an instrument called a thermometer.
The temperature of a substance is gives a measure of the average kinetic energy of the particles of the substance.
Temperature increases with addition of heat energy to a substance.
From the thermometer reading show in the picture, each interval represents 2°C. Therefore, the temperature of the water to the nearest degree is 2°C.
In conclusion, temperature measures the average kinetic energy of the molecules in a substance.
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Determine the density of a substance that weighs 640 grams and occupies a volume of 1 cube it has 4 cm edge
Explanation:
Density = mass / volume
ρ = 640 g / (4 cm)³
ρ = 10 g/cm³