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Bezzdna [24]
3 years ago
7

Need help on 6 and 7 or just one please help

Chemistry
1 answer:
fredd [130]3 years ago
6 0
The forth option on both of them. If you get them wrong, I’m sorry. I’m pretty sure both of these are right thought.
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What is the mass, in grams, of 7.20×1020 molecules of caffeine, c8h10n4o2?
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To determine the mass, you need to know the molecular weight of the c8h10n4o2 . The molecular weight of <span>c8h10n4o2 would be: 8*12 + 10*1 + 4*14 + 2*16= 194g/mol.
To convert the number of molecules into moles, you need to divide it with 6.02 * 10^23. The calculation of the mass of </span>c8h10n4o2 would be: 
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Which formula equation represents the burning of sulfur to produce sulfur dioxide?
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Explanation:

Chemical equation:

S(s) + O₂(g)   →   SO₂ (s)

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It is also used as a reducing agent.

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3 years ago
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4 years ago
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The decomposition of ammonia is: 2 NH3(g) ⇌ N2(g) + 3 H2(g). If Kp is 1.5 × 103 at 400°C, what is the partial pressure of ammoni
ValentinkaMS [17]

Answer:

"6.7\times 10^{-4} \ atm" is the right answer.

Explanation:

Given:

Partial pressure of N_2,

= 0.20 atm

Partial pressure of H_2,

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As we know,

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By putting the values, we get

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3 years ago
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