Answer:
2 significant figures i.e. 2 and 7.
Explanation:
We need to find the number of significant figures in the given number i.e. .
It has 2 significant figures i.e. 2 and 7.
It means the power of 10 doesn't count in the significant figures.
Hence, there are 2 significant figures.
Answer: To solve this question, we need to use the Avogadro's Number, which is a constant first discovered by Amadeo Avogadro, an Italian scientist. He discovered that in a mole of a substance, there are 6,02*10²³ molecules. Using this relationship, we apply the following conversion factor:
So, 8,50 * 10²⁴ molecules of Na₂SO₃ represent 14,12 moles of Na₂SO₃
Explanation:
Answer:
1.D
2.C
3.A
4.D
5.D
Explanation:
I just thought na it's the answer
The equation looks like this:
KBr + AgNO3 —-> KNO3 + AgBr
The products are potassium nitrate and silver bromide
Since temperature is constant we use Charles law which relate temperature and volume
therefore From Charles law equation that is T1/v1=T2/V2
T1=80k
V1=3.1L
T2=22+273=295k
V2=?
80k/3.1L=295k/V2
by cross multiplication
V2=(3.1L x295k)/80k=11.43L