The sandstone is older.in order for the granite to have been formed with sandstone in its precnese then it had to have already exsisted in that area..making it older.
Answer:
Explanation:
1 mole of iron is 56 grams (rounded)
x mole of iron is 38 grams (given
1/x = 56/38 Cross multiply
56x = 38*1 Divide by 56
x = 38/56
x = 0.679 mols of iron
1 mol of anything = 6.02 * 10^23
0.678 mols of iron = x
1/0.679 = 6.02 *10^23 /x
x = 0.679 * 6.02*10^23
x = 4.09 * 10 ^23
So there are 4.09 * 10^23 atoms of Fe in 38 grams of iron
Answer:
Density = 4.06 * 10^14
Explanation:
Givens
r = 1 * 10^-13 cm
m = 1.7 * 10^-24 grams
Formula
V = 4/3 * pi * r^3
D = m/V
Solution
Put the givens into the formula.
V = (4/3) 3.14 * (1 * 10^-13)^3 Find the value for r^3
V = (4/3) 3.14 * 1 * 10^-39 Find the volume. Indicate divide by 3
V = 1.256 10^-38/3
V = 4.1867 * 10^-39
Density = m / v
Density = 1.7*10^-24/4.1867*10^-39 Do the division
Density = .406 * 10^(-24 + 39)
Density = .406 * 10^15 grams/ cm^3
Answer: Density = 4.06 * 10^14
Ga, 31 electrons/ protons, 39 neutrons
