I believe its true, after all earth sciences are on a scale to which we cannot move them therefore we need to create models
The question is incomplete, here is the complete question:
A chemist measures the amount of nitrogen gas produced during an experiment. She finds that of 282. g of nitrogen gas is produced. Calculate the number of moles of nitrogen gas produced. Be sure your answer has the correct number of significant digits.
<u>Answer:</u> The number of moles of nitrogen gas produced are 10.07 moles
<u>Explanation:</u>
To calculate the number of moles, we use the equation:
We are given:
Given mass of nitrogen gas = 282 g
Molar mass of nitrogen gas = 28 g/mol
Putting values in above equation, we get:
Hence, the number of moles of nitrogen gas produced are 10.07 moles
<h3>
Answer:</h3>
16.30 %
<h3>
Explanation:</h3>
- The percent by mass is calculated by dividing the mass of solute by the mass of solution and then multiplying by 100.
- That is. Percent by mass = (Mass of solute/Mass of solution) × 100
In this case;
Mass of solute = 14.60 g
Mass of solvent = 74.95 g
But, Mass of solution = mass of solute + mass of solvent
Thus;
Mass of solution = 14.60 g + 74.95 g
= 89.55 g
Therefore;
% mass = (14.60 ÷ 89.55 g) × 100%
= 16.30 %
Hence, the mass percent is 16.30%