CHEMISTRY HIGH SCHOOL

The Haber process can be used to produce ammonia (NH3) from hydrogen gas (H2) and nitrogen gas (N2). The balanced equation for this process is shown below. 3H2 N2 Right arrow. 2NH3 The molar mass of NH3 is 17. 03 g/mol. The molar mass of H2 is 2. 0158 g/mol. In a particular reaction, 0. 575 g of NH3 forms. What is the mass, in grams, of H2 that must have reacted, to the correct number of significant figures? 0. 1 0. 102 0. 10209 0. 1021.

Answers

Answer 1
Answer:

Answer:

B

Explanation:

We are given that ammonia can be produced from hydrogen gas and nitrogen gas according to the equation:

\displaystyle 3\text{H$_2$} + \text{N$_2$} \longrightarrow 2\text{NH$_3$}

We want to determine the mass of hydrogen gas that must have reacted if 0.575 g of NH₃ was produced.

To do so, we can convert from grams of NH₃ to moles of NH₃, moles of NH₃ to moles of H₂, and moles of H₂ to grams of H₂.

We are given that the molar masses of NH₃ and H₂ are 17.03 g/mol and 2.0158 g/mol, respectively.

From the equation, we can see that two moles of NH₃ is produced from every three moles of H₂.

With the initial value, perform dimensional analysis:

\displaystyle \begin{aligned} 0.575\text{ g NH$_3$}& \cdot \frac{1\text{ mol NH$_3$}}{17.03\text{ g NH$_3$}} \cdot\frac{3\text{ mol H$_2$}}{2\text{ mol NH$_3$}} \cdot \frac{2.0158\text{ g H$_2$}}{1\text{ mol H$_2$}} \n \n & = 0.102\text{ g H$_2$}\end{aligned}

*Assuming 100% efficiency.

Our final answer should have three significant figures. (The first term has three, the second term has four (the one is exact), the third term is exact, and the fourth term has five. Hence, the product should have only three.)

In conclusion, our answer is B.

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Which halogen is most likely to react?a. Br (bromine)
b. F (fluorine)
c. I (iodine)
d. Cl (chlorine)

Answers

The correct answer is B. Fluorine is the most reactive among the choices. The choices given belongs to the group of halogens which means salt-producing. These elements reacts with metals to produce salts. The reactivity of these halogens can be predicted using the periodic table. As you go down the group 7 elements, reactivity of these elements decreases.

Answer:

B

MAY I PLZ HAVE BRAINIEST

Determine the percent yield for the reaction between 46.5 g of ZnS and 13.3 g of oxygen if 18.l4 g of ZnO is recovered along with an unknown quantity of sulfur
dioxide.
please show work thank you

Answers

The percentage yield of the reaction has been 46.74%.

Percentage yield can be given as the ratio of the actual yield to the theoretical yield.

For the theoretical yield, the balanced equation will be:

\rm 2\;ZnS\;+\;3\;O_2\;\rightarrow\;2\;ZnO\;+\;2\;SO_2

Thus, 2 moles of ZnS will give 2 moles of ZnO.

The moles of 46.5 g ZnS:

Moles = \rm (weight)/(molecular\;weight)

ZnS = \rm (46.5)/(97.474)

ZnS = 0.477 mol

The moles of 13.3 grams Oxygen:

Oxygen = \rm (13.3)/(32)

Oxygen = 0.415 mol.

The moles of 18.14 grams ZnO:

ZnO = \rm (18.14)/(81.38)

ZnO = 0.222 mol

According to the balanced chemical equation,

2 moles ZnO = 2 moles ZnS

0.222 mol ZnO = 0.222 mol ZnS

2 moles ZnO = 3 moles Oxygen

0.222 mol ZnO = 0.334 mol of Oxygen

Since, both the reactants are in enough concentration,

The theoretical yield can be calculated with any of the reactants. The theoretical yield of ZnO from 46.5 grams of ZnS can be given as:

1 mole ZnS = 1 mol ZnO

0.477 mol of ZnS = 0.477 mol of ZnO.

The mass of 0.477 mol of ZnO:

Mass = moles * molecular weight

Mass of ZnO = 0.477 * 81.38

Mass of ZnO = 38.818 grams.

The theoretical yield of ZnO = 38.818 g.

The actualyield of ZnO = 18.14 g.

Percentage yield = \rm (18.14)/(38.81)\;*\;100

Percentage yield = 46.74 %

The percentage yield of the reaction has been 46.74%.

For more information about the percentage yield, refer to the link:

brainly.com/question/11715808
Found an answer sheet :)

What is a single kind of organism that can reproduce among its own kind?

Answers

Bacteria, protista, etc. Prokaryotes

Potassium hydroxide is classified as an Arrhenius base because KOH contains(1) OH- ions (2) O2- ions (3) K+ ions (4) H+ ions

Answers

Answer : The correct option is, (1) OH^- ions.

Explanation :

According to the Arrhenius concept, an acid is a type of substance which ionizes in water to gives H^+ ions (hydronium ions or hydrogen ions) and a base is a type of substance which ionizes in water to gives OH^- ions (hydroxide ions).

As we know that KOH is a base which ionizes in water to gives OH^- ions (hydroxide ions) and K^+ ions.

Hence, potassium hydroxide is classified as an Arrhenius base because KOH contains OH^- ions.
The answer is (1)OH- ions. The base has more OH- ions while the acid has more H+ ions. And if you dissolve them into water, the pH of the solution is also different. Base has pH>7 and acid has pH<7 at room temperature.

Matter is made up of very small particles called

Answers

Matter is made up of very small particles called Atom.

What is an Atom ?

An atom is the smallest unit of ordinary matter that forms a chemical element.

Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are extremely small, typically around 100 picometers across.

An atom consists of a central nucleus that is usually surrounded by one or more electrons. Each electron is negatively charged. The nucleus is positively charged, and contains one or more relatively heavy particles known as protons and neutrons.

An atom is a particle of matter that uniquely defines a chemical element.

Therefore, Matter is made up of very small particles called Atom.

Learn more about atom here ;

brainly.com/question/1566330

#SPJ6
Matter is made up of very small particles called ''Atom'

An atom are the basic building blocks of ordinary matter. Atoms can join to form molecules, which in turn from most of the objects around you.

Atoms are composed of particles called protons, electrons, and neutrons.

Protons carry a positive electrical charge.
Electrons carry a negative electrical charge.
Neutrons carry no electrical charge at all.

Hope i helped! And i know you didn't ask for all that, but i put by the way. If you need anything else ask me.

If 21.3 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 297 Kelvin and 1.40 atmospheres? Show all of the work used to solve this problem. 2Li (s) + 2H2O (l) yields 2LiOH (aq) + H2 (g

Answers

Hope it helped you.
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