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Dennis_Churaev [7]
3 years ago
14

Which formula can be used to calculate the molar mass of ammonia (NH3)?

Chemistry
1 answer:
Vesnalui [34]3 years ago
7 0

<u>Answer:</u> The correct answer is Option C.

<u>Explanation:</u>

Molar mass is defined as the sum of the atoms present in a compound each multiplied with the number of atoms present in it.

For a compound A_xB_y

The molar mass will be = [(x\times \text{Molar mass of A})+(y\times \text{Molar mass of B})]

So, for the given compound NH_3,

The molar mass will be = [(1\times \text{Molar mass of Niyrogen})+(3\times \text{Molar mass of Hydrogen})]

Hence, the correct answer is Option C.

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If you have 6.25g of O2, how many moles of H2O are produced?
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Answer:

0.4 moles of water produced by 6.25 g of oxygen.

Explanation:

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Moles of water produced = ?

Solution:

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2H₂ + O₂  → 2H₂O

Number of moles of oxygen:

Number of moles = mass/ molar mass

Number of moles = 6.35 g/ 32 g/mol

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Now we will compare the moles of oxygen with water:

                    O₂          :          H₂O

                     1            :            2

                   0.2          :        2×0.2 = 0.4 mol

0.4 moles of water produced by 6.25 g of oxygen.

8 0
3 years ago
A student conducts an experiment to determine how the temperature of water affects the time for sugar to dissolve. In each trial
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The fact that the student used different amount of water (another independent variable) is wrong with the experimental design

WHAT ARE THE COMPONENTS OF AN EXPERIMENT?

  • An experiment aims at solving a scientific problem or answering a scientific question. An experiment should contain a variable being changed called INDEPENDENT VARIABLE and a variable being measured called DEPENDENT VARIABLE.

  • In an ideal experiment, only one independent variable should be used while every other variable should be kept constant. This is done so as not to affect the result of the experiment.

In the experiment conducted by the student in this question, two independent variables were used i.e. the different amount of water and the different temperatures. This is what is wrong about the experimental design.

  • In a nutshell, the fact that two independent variables were used by the student is what is wrong about the experimental design.

Learn more at: brainly.com/question/967776

8 0
2 years ago
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