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BlackZzzverrR [31]
3 years ago
12

how many moles of sodium are present in a sample of sodium having a mass of 137 g? (molar mass is 23.0g)

Chemistry
1 answer:
vivado [14]3 years ago
7 0

Answer:

5.95 moles

Explanation:

No of moles = given mass / molar mass

No of moles = 137/23

= 5.95 moles

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A sample of N2O3(g) has a pressure of 0.046 atm . The temperature (in K) is then doubled and the N2O3 undergoes complete decompo
iogann1982 [59]

Answer:

0.184 atm

Explanation:

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N₂O₃(g) ⇄ NO₂(g) + NO(g)

So, 1 mol of N₂O₃ will produce 2 moles of the products (1 of each), the <em>n </em>will double. The volume and the temperature are now constants, and the pressure is directly proportional to the number of moles, so the pressure will double to 0.184 atm.

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3 years ago
How many covalent bonds does and oxygen stone usually make in forming covalent compounds?
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Answer: Oxygen usually forms two covalent bonds or a covalent double bond.

Explanation:

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