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WHAT IS A COMPOUND ?</h2><h2>
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ᴛʜᴇ ᴀɴꜱᴡᴇʀ ᴛᴏ ᴛʜɪꜱ ɪꜱ :
ʙᴇᴄᴀᴜꜱᴇ ꜱᴏᴅɪᴜᴍ ɪꜱ ᴀ ᴄᴏᴍᴘᴏᴜɴᴅ.
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ᴊᴀᴄᴇ ノシ
Answer:
C
Explanation:
the sum of calories is 100. When 50 calories are lost, 50 calories is the remainder.
Answer:
3) an applied electric current
Explanation:
An electric source is used in an electrolytic cell.
There are 6.44 × 10²³ molecules in 24.0 L of oxygen gas at standard temperature and pressure.
HOW TO CALCULATE NUMBER OF MOLECULES:
To calculate the number of molecules in a substance, we need the number of moles. The number of moles can be calculated using ideal gas law equation as follows:
PV = nRT
Where;
- P = pressure
- V = volume
- n = number of moles
- T = temperature
- R = gas law constant
According to this question, oxygen gas is at standard temperature (273K) and pressure (1 atm)
1 × 24 = n × 0.0821 × 273
24 = 22.4n
n = 24 ÷ 22.4
n = 1.07moles
To calculate the number of molecules, we multiply the no. of moles by Avogadro's number (6.02 × 10²³)
no. of molecules = 1.07 × 6.02 × 10²³
no. of molecules = 6.44 × 10²³
Therefore, there are 6.44 × 10²³ molecules in 24.0 L of oxygen gas at standard temperature and pressure.
Learn more about how to calculate number of molecules at: brainly.com/question/19481036?referrer=searchResults