Answer:
4.419 g
Explanation:
55 years is 5.5 half lives
200 g * (1/2)^5.5 = 4.419 g
Calcium Phospate formula: Ca3(PO4)2
Atomic weight:
Ca = 40 ; P = 31 ; O = 16
Ca3 = 40 * 3 = 120
P = 31
O4 = 16 * 4 = 64
(PO4)2 = (31 + 64) * 2 = 95 * 2 = 190
Ca3(PO4)2 = 120 + 190 = 310 g/mol
31/310 = 10% P in the calcium phospate
1.00kg * 1000 g/kg = 1000 g of phosphorus.
1000 g / 10% = 10,000 g of calcium phosphate
10,000 g / 58.5% = 17,094 grams of ore.
The minimum mass of the ore should be 17,094 grams or 17.094 kg.
a because the spoon is a solid and the hot chocolate is a liquid.So that means that spoon moves slower than a liquid.
Answer:
What is the specific heat for the aluminum wire?
0.82
What is the specific heat for the steel wire?
0.47
What is the specific heat for the lead pellets?
0.25
Explanation:
<span>A. Salt lowers the freezing point of water, which makes the melted snow on the road less likely to form ice.</span>