<u>Answer:</u> The number of moles of strontium bicarbonate is ![7.5\times 10^{-9}mol](https://tex.z-dn.net/?f=7.5%5Ctimes%2010%5E%7B-9%7Dmol)
<u>Explanation:</u>
Formula units are defined as lowest whole number ratio of ions in an ionic compound. It is calculate by multiplying the number of moles by Avogadro's number which is ![6.022\times 10^{23}](https://tex.z-dn.net/?f=6.022%5Ctimes%2010%5E%7B23%7D)
We are given:
Number of formula units of ![Sr(HCO_3)_2=4.55\times 10^{15}](https://tex.z-dn.net/?f=Sr%28HCO_3%29_2%3D4.55%5Ctimes%2010%5E%7B15%7D)
As,
number of formula units are contained in 1 mole of a substance.
So,
number of formula units will be contained in =
of strontium bicarbonate.
Hence, the number of moles of strontium bicarbonate is ![7.5\times 10^{-9}mol](https://tex.z-dn.net/?f=7.5%5Ctimes%2010%5E%7B-9%7Dmol)
Answer:
2.64%
Explanation:
mass percent = (grams of solute / grams of solution) x 100
mass percent = (2.4 / 91) × 100
mass percent = 2.64% to 3sf
Answer: 10L
Explanation:
Given that:
Initial pressure P1 = 1 atm
New pressure P2 = 3 atm
Initial volume V2 = 30 L
New volume V2 = ?
Since pressure and volume are involved, apply the formula for Boyle's law
P1V1 = P2V2
1 atm x 30L = 3 atm x V2
30 atm L = 3 atm x V2
V2 = (30 atm L / 3 atm)
V2 = 10L
Thus, volume changed to 10 liters