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matrenka [14]
3 years ago
10

Calculate the mass (in g) of 2.1 x 1024 atoms of W.

Chemistry
1 answer:
vfiekz [6]3 years ago
6 0
Set up your units to algebraically cancel out the original unit, and end up with the units of the answer in the final numerator. We'll first convert to moles by using Avogadro's number, then the atomic mass of tungsten (W) from the periodic table, since the mass, in grams, of one mole of any element is the atomic mass number:
2.1x10∧24 atoms W x (1 mole/6.022x10∧23 atoms) x (183.84g/1 mole) = 641.089 grams
Since your given number has only two significant figures (2.1), your answer should also only express in 2 sig figs: 6.4x10∧2 grams

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Explanation:

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Nitroglycerin (c3h5n3o9) is a powerful explosive. its decomposition may be represented by 4c3h5n3o9 → 6n2 12co2 10h2o o2 this re
professor190 [17]
The balanced chemical reaction describing this decomposition is as follows:
<span>4c3h5n3o9 .............> 6N2 + 12CO2 +10H2O + O2

From the periodic table:
mass of oxygen = 16 grams
mass of nitrogen = 14 grams
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From the balanced chemical equation:
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7 0
3 years ago
Read 2 more answers
Your friend, a business major, overhears you talking about chemical energy and food and decides to develop a new super food for
RUDIKE [14]

Answer:

The question is incomplete. The response options are as follows:

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7 0
3 years ago
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jonny [76]
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Help please! I'd appreciate it 
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Answer:

16.56 g

Explanation:

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6 0
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