Answer:
1450 k
Explanation:
We are given:
V1 = 250 mL V2 = 500 mL
T1 = 725k T2 = T
V1 / T1 = V2 / T2
Now, replacing the values:
250 / 725 = 500 / T
T = 500 * 725 / 250
T = 2 * 725
T = 1450 k
Answer:
An Atomic Number is the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
A Mass number is the total number of protons and neutrons in a nucleus.
An Atomic Mass is the mass of a single atom of a chemical element. It includes the masses of the 3 subatomic particles that make up an atom: protons, neutrons and electrons.
Answer:
399
Explanation:
Pb(SO4)2 contains 1 atom of Pb, 2 atoms of S and 8 atoms of O. So, atomic mass of Pb(SO4)2 is 207 + 64 + 128 = 399 u. Therefore, molar mass of Pb(SO4)2 is 399 g/mol.HOPE THIS helps. Good Luck