Answer:
petroleum,natural gas,lime stone, coal,water,acetylene etc.
You have to use the molar volume of gas which is 22.4L/mol at STP. To find the number of moles of from a given volume of gas at STP, you need to divide the given volume by 22.4L/mol.
44.4L/22.4L/mol=1.98mol of gas
Answer:
13 chromosomes, meiosis
Explanation:
the sperm cell contributes half of the chromosome in an offspring while the egg cells contributes the other half. Hence, the sperm cell has half of 26, 13. This process is called meiosis. Meiosis is when one cell undergoes cell division twice, thus creating 4 new cells. Each of these 4 new cells have half the amount of chromosomes as the original cell.
Answer : The mass of iron needed is 29.5 grams.
Explanation : Given,
Mass of 
= 12 g
Molar mass of = 32 g/mol
First we have to calculate the moles of .
Now we have to calculate the moles of 
The balanced chemical equation is:
From the reaction, we conclude that
As, 3 moles of react with 4 moles of
So, 0.375 mole of react with 
mole of
Now we have to calculate the mass of
Molar mass of = 59 g/mole
Therefore, the mass of iron needed is 29.5 grams.
