Answer:
i belive its b
Explanation:
A formula unit of an ionic compound
Select one:
a. is an independent unit that can be isolated and studied.
O b. is the simplest ratio of ions that balances total charge.
O c. describes the crystal lattice.
O d. all of the above
please help
Answer:
b. is the simplest ratio of ions that balances total charge.
Explanation:
Hope it helps.
We can see here that a formula unit of an ionic compound is: b. is the simplest ratio of ions that balances total charge.
What is ionic compound?An ionic compound is a type of chemical compound that is formed through the bonding of ions, which are charged particles. These compounds are made up of positively charged ions, known as cations, and negatively charged ions, known as anions, which are held together by electrostatic forces of attraction.
Ionic compounds play significant roles in various applications, including inorganic chemistry, materials science, and industrial processes.
Thus, Option B is the correct answer.
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The reaction of hydrogen with oxygen produces water.
2H2(g) + O2(8) - 2H2O(g)
a. How many moles of O2 are required to react with 2.6 mol
of H2?
b. How many moles of H, are needed to react with 5.0 mol
of O2?
c. How many moles of H2O form when 2.5 mol of O2
reacts?
Consider preparing ammonia gas by the following reaction:
N2(g) + 3H2(g)
===>
2NH3(g)
If you have 28.02 g of N2 and excess H2, how many grams of NH3(g) can be produced.
6.06 g
14.01 g
34.08 g
68.16 g
28.02 g
Answer:
34.08 g
Explanation:
Take the atomic mass of N=14.0, H=1.0/
no. of moles=mmass/molar mass
no. of moles of N2 used = 28.02 / (14x2)
=1.0007mol
From the equation, the mole ratio of N2 : NH3 = 1: 2,
so one mole of N2 produces 2 moles of NH3.
Using this ratio, we can deduce that the no. of moles of NH3 = 1.0007x2
= 2.001428mol
mass = no. of moles x molar mass
Hence,
mass of NH3 produced = 2.001428 x (14+1x3)
= 34.03
≈C
Which state of matter is characterized by ionized particles, no definite shape or volume, and good electrical conductivity? gas liquid plasma solid
Answer: Plasma
Explanation: Plasma is the state of matter where the substance is ionized and has no definite shape or volumen. The fact of being ionized makes the substance a good electrical conductor.
Hope it helps.
Matter generally exists in three physical states, namely solid, liquid and gaseous states. The three states mainly differ in the arrangement of particles and the force of attraction among the constituent particles. Here plasma is characterized by ionized particles. The correct option is C.
What is plasma?Plasma is a hot ionized gas which contains equal numbers of positively and negatively charged electrons. The characteristics of plasmas are significantly different from those of ordinary neutral gases so that it is considered as the fourth state of matter.
Since plasma are made up of electrically charged particles, they are strongly influenced by electric and magnetic fields while neutral gases are not. Like gases plasmas have no fixed shape or volume and are less dense than solids or liquids.
Plasma is a superheated matter, so hot that the electrons are ripped away from the atoms forming ionized gas. It comprises over 99% of the visible universe.
Thus the correct option is C.
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4. A chemical reaction has the equation 2NaCl (aq) + F2 (g) + 2NaF (s) + Cl2 (g). What type of reaction occurs between NaCl and F2?
A. Double displacement
B. Single displacement
C. Synthesis
D. Decomposition
A chemical reaction has the equation 2NaCl(aq) + F₂ → 2NaF(s) + Cl₂ (g). The reaction type occur between NaCl and F₂ is Single displacement.
Hence, Option (B) is correct answer.
What is a Chemical reaction ?A chemical reaction is a process in which chemical bonds between atoms to break and reorganize, to form other new substances.
Now lets check all options one by one
Option (A): Double displacement
A double displacement is a chemical reaction in which elements are exchange between the two compounds. In the given reaction F₂ is not a compound. so this reaction cannot occur
Hence, option (A) is incorrect.
Option (B): Single displacement
A Single displacement reaction is a chemical reaction in which one element replaces the another element in a compound.
In the given reaction F₂ element replaces with the element Na in a compound NaCl. So this reaction occur.
Hence, option (B) is correct.
Option (C): Synthesis
A synthesis reaction is a chemical reaction where two or more substances react to produce a new compound.
In the given reaction two products are formed NaF which is a compound and Cl₂ which is element. So this reaction cannot occur.
Hence, option (C) is incorrect.
Option (D): Decomposition
A decomposition reaction is a chemical reaction in which one reactant breaks down to form a two or more products.
In the given reaction two reactants are given NaCl and F₂. So this reaction cannot occur.
Hence, option (D) is incorrect.
Thus, from above conclusion we can say that The reaction occurs between NaCl and F₂ is single displacement reaction.
Hence, Option (B) is correct answer.
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How many grams of N2 can be produced when 6.50 g of O2
reacts?
Answer:
3.79 g of N2.
Explanation:
We'll begin by writing the balanced equation for the reaction.
This is given below:
4NH3 + 3O2 → 2N2 + 6H2O
Next, we shall determine the mass of O2 that reacted and the mass of N2 produced from the balanced equation.
This is illustrated below:
Molar mass of O2 = 16x2 = 32 g/mol
Mass of O2 from the balanced equation = 3 x 32 = 96 g
Molar mass of N2 = 2x14 = 28 g/mol
Mass of N2 from the balanced equation = 2 x 28 = 56 g
Summary:
From the balanced equation above,
96 g of O2 reacted to produce 56 g of N2.
Finally, we shall determine the mass of N2 produced by reacting 6.50 g of O2.
This can be obtained as follow:
From the balanced equation above,
96 g of O2 reacted to produce 56 g of N2.
Therefore, 6.50 g of O2 will react to produce = (6.50 x 56)/96 = 3.79 g of N2.
Therefore, 3.79 g of N2 were obtained from the reaction..
which three events occur when earths convection currents move toward each other
Answer:
Option A, Tectonic plates above the currents move toward each other.
Option C, One plate will submerge beneath another plate.
Option D, A convergent boundary is formed at the site of the collision.
Explanation:
The convection currents are the ones responsible for the movement of the tectonic plates, thus shaping the Earth's appearance with their movement, as well with the structures created by the movement. If the convection currents move toward each other, than the tectonic plates are moving toward each other. That will cause collision between the continents, and convergent boundaries will be formed. If the collision is between two or more continental plates, than they will merge, and from the pressure mountain ranges will start to form, but if there an oceanic plate involved as well, than the oceanic plate will be subducting beneath the continental plate or plates.
Answer:
- Tectonic plates above the currents move toward each other;
- One plate will submerge beneath another plate;
- A convergent boundary is formed at the site of the collision;
The convection currents are the ones responsible for the movement of the tectonic plates, thus shaping the Earth's appearance with their movement, as well with the structures created by the movement. If the convection currents move toward each other, than the tectonic plates are moving toward each other. That will cause collision between the continents, and convergent boundaries will be formed. If the collision is between two or more continental plates, than they will merge, and from the pressure mountain ranges will start to form, but if there an oceanic plate involved as well, than the oceanic plate will be subducting beneath the continental plate or plates.
? Question
Select the correct answer.
Which statement about mass wasting is correct?
O Mass wasting is rocks moving downhill.
o Earthquakes cause all mass wasting.
O Gravity drives all mass wasting.
O All mass wasting happens on mountains.
Answer:
Gravity drives all mass wasting.
Explanation:
Mass wasting can be defined as the process of wasting away of earth's outer crust. This movement is also known as slope movement that causes large rock, soil, and debris to move downward, a force driven by gravity.
The term is often used interchangeably with landslide yet it is different. It is also known as mass movement as is cause massive downslope movement of rock, regolith, snow, ice, and-the-like on the earth's outer crust.
All these movements are driven mainly by gravity. Gravity consantly tries to pull the rocks and soil down the slope but the resisting power. also known as shear strength, of moutains helps them to deny the gravitional force.
Thus from the given options the statement that can be said to be true about mass wasting is that mass wasting is driven by gravity. So, the correct option is C.
Answer:
C. Gravity drives all mass wasting.
Explanation:
Plato answer
Which one has a greatest mass, one atom of carbon, one atom of hydrogen, or one atom of litium
Hi :) how to do 4(b)?
Answer:
they produce water and a neutral ionic compound called a salt. The reaction is called a neutralization reaction.
Explanation:
What element has the electron configuration 1s^22s^22p^63s^23s^23p^4?
Answer: it’s S
Explanation:
The element with electronic configuration of 1s²2s²2p⁶3s²3p⁴ is sulphur (S)
The correct answer to the question is Option C. S
Electronic configuration is simply defined as the arrangement of electrons around the nucleus of an atom.
With the electronic configuration of an element, we can obtain the name of the element by simply obtaining the total number of electrons in the shells and comparing it with those in the periodic table.
From the question given above,
Electronic configuration => 1s²2s²2p⁶3s²3p⁴
Name of element =?Total electron = 2 + 2 + 6 + 2 + 4 = 16
Thus, the element has 16 electrons. This is assumed to be atomic number of the element.
Comparing the atomic number of the element (i.e 16) with those in the periodic table, the element is Sulphur with the symbol S.
Therefore, the element with electronic configuration of 1s²2s²2p⁶3s²3p⁴ is sulphur (S)
Option C. S gives the correct answer to the question.
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procedure to find out if the penny is real copper with copper wire
Answer:
Four ways to test a copper penny are given below:-
Explanation:
Firstly, take a quick look only at the color of the penny. Zinc pennies may appear patchy, irregular whereas copper-gold coins may seem more probable to be orange or even chocolate. Secondly, drop your penny on the floor and hear the noise it's making. The copper penny would have a "started to ring" sound in this situation, whereas the zinc penny should "clunk." Third, you can weigh the centimeter. You'll need an accurate scale weighing in grams. The penny of copper will weigh 3.11 grams while the penny of zinc weighs 2.5 grams. In the end, look at the date. If your penny was taken out of circulation before 1982, 95 percent copper and 5 percent zinc will be made. Beginning in 1982, pennies had just 2.5 percent copper and 97.5 percent zinc in them. Pennies from any of the two formulations made in 1982 may be produced.
Which lifestyle is most likely to lead to infertility in a male ?
A man who works as a mechanic
A man who works as a computer programmer and sits at desk magority of the day
A semi professional athlete
A man who works for a company’s that applies pesticides to lawns
Answer:
The second on, A man who works as a computer programmer and sits at desk magority of the day.
Explanation:
Answer:
Explanation:
The only answer I can think as being possible is the last one. Pesticides are chemicals that go after unwanted animal life. They do not know that they should not attack human beings.
Infertility could very well be one of the side effects of a pesticide. There are others as well. Some pesticides go after the central nervous system (think mice and rats) and those are dangerous to use and to leave around.
The others all involve occupations that either require authentic abilities or mental astuteness. Neither should affect a man's ability to reproduce.
If the pH of a solution is 7.6, what is the pOH? A. 6.4 B. 8.4 C. 5.4 D. 7.4
Answer:
6.4
Explanation: pH
+
pOH
=
14
So if
pH
=
7.6
then
pOH
=
14
−
pH
=
6.4
Explanation:
Wrote this out spaced so it's more clear.
Q10. Calcium fluoride can be made from the reaction of calcium metal with fluorine gas. The image shows this reaction. Explain how the product is formed in terms of electron movement and what the final electron configurations are
Answer:
The answer to your question is given below
Explanation:
In this reaction, the calcium metal, Ca loses two electrons to form calcium ion, Ca^2+ and two fluorine atoms, F receives the two electrons to form two fluoride ion, F^-.
This is illustrated by the following equation:
Ca —> Ca^2+ + 2e
2F + 2e –> 2F^-
Ca + 2F + 2e —> Ca^2+ + 2F^- + 2e
Cancel out 2e
Ca + 2F —> Ca^2+ 2F^-
Thus, the electronic configuration can be written as follow:
Before combination:
Calcium, Ca (20) => 2, 8, 8, 2
Two fluorine atom, F (9) => 2, 7 and 2, 7
After combination:
Calcium ion, Ca^2+ => 2, 8, 8
Two fluoride ion, F^- => 2,8 and 2,8
For each of the esters provided, identify the alcohol and the carboxylic acid that reacted.
52. Methyl propanoate+_________
53. Ethyl methanoate+__________
Answer:
52. The alcohol USED => methanol, CH3OH
The carboxylic acid USED => propanoic acid, CH3CH2COOH.
53. The alcohol USED => Ethanol, CH2CH3OH
The carboxylic acid USED => Formic acid, HCOOH.
Explanation:
52. To obtain Methyl propanoate, CH3CH2COOCH3, we simply react propanoic, CH3CH2COOH and methanol, CH3OH together as shown below:
CH3CH2COOH + CH3OH —> CH3CH2COOCH3 + H2O
The alcohol used: methanol, CH3OH
The carboxylic acid used: propanoic acid, CH3CH2COOH.
53. To obtain Ethyl methanoate, HCOOCH2CH3, we simply react
Formic acid, HCOOH and ethanol, CH3CH2OH together as show below:
HCOOH + CH3CH2OH —> HCOOCH2CH3 + H2O
The alcohol USED => Ethanol, CH2CH3OH
The carboxylic acid USED => Formic acid, HCOOH.
How many grams of water are produced when 2.50 mol oxygen reacts with hydrogen?
H2 + O2 + H2O
Select one:
a. 45.0 g
b. 22.5 g
c. 90.0 g
O d. 3.6 g
PLEASE HELP
Answer:
it is 90.0
Explanation:
the nature of zinc powder and Cobalt (II )oxide is heated the following reaction occurs ;
Zn(s)+CoO(s) => ZnO(s)+Co(s)
1)which metal is high in the reactivity series
2)the zink can be described as a reducing agent. using this Example explain what is the mean by the term ' reducing agent '
plz help!!!
1) The metal which reduces the other compound is the one higher in the reactivity. So in this case it is [tex] \mathrm{Zn}[/tex].
2) The substance which brings about reduction while itself getting oxidised (that is losing electrons) is called a reducing agent. Here, $\mathrm{Zn}$ is the reducing agent and reduces Cobalt Oxide to Cobalt while itself getting oxidised to Zinc oxide.
Calculate the number of moles in each of the following:
a. 82.0 g of Ag
b. 0.288 g of C
c. 15.0 g of ammonia, NH3 d. 7.25 g of CH4
e. 245 g of Fe2O3

Answer:The mole, symbol mol, is the SI base unit of amount of substance. The quantity amount of substance is a measure of how many elem
Explanation:
Which statement about acids is true?
a) Weak acids have a pH of less than 2.
b) The pH value of acids can only be measured in aqueous form.
c) The stronger the acid, the higher the pH value.
d) Strong acids have a low percent ionization.
Answer:
weak acids have a pH of less than 2
As Danny was pouring cereal for his breakfast, he noticed that the cereal box says that the cereal contains 5 milligrams of iron per serving. Danny decided to perform an experiment to test this claim. He found that the cereal contains 4.6 milligrams of iron per serving. Based on Danny's measurement, the value reported on the label is ( CORRECT OR INCCORECT) because A: (IT IS DIFFERENT FROM THE VALUE DANNY MEASURED) B: (IT IS REORTED TO THE NEAREST MILLIGRAM) C: (IT USES THE SAME UNITS THAT DANNY USED).
Answer:
Correct, because B it is reported to the nearest miligram
Explanation:
4.6 rounded up is 5
Scientific evidence shows that Earth's diameter, and thus overall size, does
not change. This evidence goes against which two theories?
A. Expanding Earth
B. Plate tectonics
O c. Contracting Earth
D. Continental drift
U
SUBMIT
Answer:
The evidence goes against A. Expanding Earth and B. Contracting Earth
What is the value of the equilibrium constant Kcif the concentration of NO and NOBr are 0.10 M and
the concentration of Br2 is 3.0 M?
2NOBr(8) = 2NO(g) + Br2(g)
Answer:
3
Explanation:
Data obtained from the question include:
Concentration of NO, [NO] = 0.1M
Concentration of NOBr, [NOBr] = 0.1M
Concentration of Br, [Br2] = 3M
Equilibrium constant, Kc =..?
The equilibrium constant, Kc is simply the ratio of the concentration of the products raised to their coefficient to the concentration of the reactants raised to their coefficient.
Thus, the equilibrium constant, Kc for reaction can be obtained as follow:
2NOBr <==> 2NO + Br2
Kc = [NO]² [Br2] /[NOBr]²
[NO] = 0.1M
[NOBr] = 0.1M
[Br2] = 3M
Kc =..?
Kc = [0.1]² [3] /0.1]²
Kc = 3
Therefore, the equilibrium constant Kc, for the reaction is 3.
Answer:
3
Explanation:
Heat is a measurement of temperature change. TRUE or FALSE
Answer:
i think its false because heat is defined as the sum of kinetic enegry present in the molecules of substances.
what is a controlled variable for ionic bonds and covalent bonds?
Answer:
controlled variable is a variable that is kept constant during a controlled experiment and covalent bond is a chemical bond formed when two atoms share electrons.
Explanation:
Bromine water was added dropwise to test tubes containing aqueous solutions of bromide, chloride, and iodide. lodide was oxidized to iodine; bromide and chloride gave no reaction Arrange Br 2 ,Cl 2 ,I 2 in order of their strength as an oxidizing agent.
Answer:
Cl₂ > Br₂ > I₂
Explanation:
An oxidizing agent gains electron for itself by removing electrons from other reactants during a reaction. Oxidation is the loss of electrons. Chlorine can take electron from bromine and chlorine while bromine can take electron from iodine, therefore chlorine is a more oxidizing agent than bromine and iodine while bromine is a more oxidizing agent than iodine.
Oxidizing ability decreases down the group.
Therefore Cl₂ > Br₂ > I₂
Which process is based on repulsion of oil and water?
Answer:
We can seprate oil and water by the process of seprating funnel
What factors influence the absorption of sunlight at Earth's surface
Answer:
Solar elevation.
Ozone.
Cloud cover.
Ground surface reflectivity.
Altitude.
Aerosols and pollutants.
Direct and diffuse UV.
I'm not sure if this was what you were looking for, but if it helps please mark me as brainliest.
In the reaction Ca + Cl2 → CaCl2, what is the mole ratio of chlorine to calcium chloride?
Select one:
O a. 2:3
O b. 2:1
O c. 1:2
O d. 1:1
PLEASE HELP ME
Answer:
D. 1:1
Explanation:
For every 1 mole of chlorine (Cl₂), there is one mole of calcium chloride (CaCl₂).
So, the mole ratio of chlorine to calcium chloride is 1:1.
Hope this helps. :)
The mole ratio of chlorine to calcium chloride in the given chemical reaction is 1:1.
What is the stoichiometry?Stoichiometry of the reaction gives idea about the relative amount of moles of reactants and products present in the given chemical reaction.
Given chemical reaction is:
Ca + Cl₂ → CaCl₂
From the stoichiometry of the given reaction it is clear that,
1 mole of chlorine = reacts with 1 mole of calcium chloride
So, mole ratio = Chlorine / calcium chloride = 1:1
Hence required mole ratio is 1:1.
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How do you know there was a chemical reaction?
Answer:
depends
Explanation:
because different chemicals can react they all have different ways of showing a reaction. an example is given: color, odor, texture weight solidity
Answer:
U will know there is a chemical reaction, when light, heat, color change, gas production, odor, or sound. The starting and ending materials of a physical change are the same
Explanation: