One mole is always the same number: 6.02 * 10^ 23.
So, one mole of cars = 6.02 * 10 ^23 cars; one mole of pencils = 6.02 * 10^23 pencils; one mole of atoms = 6.02 * 10^23 atoms; one mole of molecules = 6.02 * 10^23 molecules.
So, all the options are correct: one mole of calcium ions has 6.02 * 10^23 representative particles, such as one mole of calcium nuclei and one of calcium atoms.
Answer:Ionic compounds are compounds composed of ions, charged particles that form when an atom (or group of atoms) gains or loses electrons. (A cation is a positively charged ion; an anion is a negatively charged ion.) Covalent or molecular compounds form when elements share electrons in a covalent bond to form molecules.
Answer:
a. 1.00 x 10⁴ J = 10.0 kJ
b. 1.42 x 10⁴ J = 14.2 kJ
Explanation:
Given the change in temperature during the reaction and assuming the volume of water and density remains constant, the change in enthalpy for the reaction will be given by
ΔHxn = Q = mCΔT where,
m= mass of water
C= specific heat of water, and
ΔT= change in temperature
a. mH₂O = 400.0 mL x 1.00g/mL = 400.00 g
Q = ΔHrxn = 400.00g x 4.184 J/gºC x 6.00 ºC = 1.00 x 10⁴ J = 10.0 kJ
b. mH₂O = 200.0 mL x 1.00 g/mL = 200.0 g
Q = ΔHrxn = 200.00 g x 4.184 J/gºC x 17.0ºC = 1.42 x 10⁴ J = 14.2 kJ
Answer:
Ca2s that is answers and CuSO4is
the answer Is A hope it helps