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sesenic [268]
2 years ago
9

Please help me with this. (: I'd appreciate it.

Chemistry
1 answer:
Soloha48 [4]2 years ago
4 0

Answer:

The answer to your question is:  ΔH = -283 kJ/mol, first option

Explanation:

Reaction

                CO  +  O₂     ⇒     CO₂

ΔH = ∑H products - ∑H products

ΔH = -393.5 - (-110.5 + 0)

ΔH = -393.5 + 110.5

ΔH = -283 kJ/mol

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Which of the following arrangements of the visible colors of light is in the correct order of increasing energy?
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2 years ago
Automotive airbags inflate when a sample of sodium azide, NaN3, is very rapidly decomposed.
Kobotan [32]

Answer:

148 g

Explanation:

Step 1: Write the balanced equation for the decomposition of sodium azide

2 NaN₃ ⇒ 2 Na + 3 N₂

Step 2: Calculate the moles corresponding to 95.8 g of N₂

The molar mass of N₂ is 28.01 g/mol.

95.8 g × 1 mol/28.01 g = 3.42 mol

Step 3: Calculate the moles of NaN₃ needed to form 3.42 moles of N₂

The molar ratio of NaN₃ to N₂ is 2:3. The moles of NaN₃ needed are 2/3 × 3.42 mol = 2.28 mol.

Step 4: Calculate the mass corresponding to 2.28 moles of NaN₃

The molar mass of NaN₃ is 65.01 g/mol.

2.28 mol × 65.01 g/mol = 148 g

8 0
2 years ago
Which state of matter is not easily compressed, but easily changes shape to fill its container
Dafna1 [17]
A liquid is the answer :)
8 0
3 years ago
Read 2 more answers
Salts usually have a low melting point true or false
antoniya [11.8K]
Hello!

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Hope this helps. Thank you
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How many moles are in 20 grams of Ca (Calcium)? *
Flura [38]

Answer:

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Explanation:

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