Determine the number of moles of cr atoms in 50.00grams of cr2cl3

molar mass of cr2cl3 = 158.5 g/mole
number of mole of cr2cl3 in 50 grams of cr2cl3= 0.3155 moles

We know from the formula of Cr₂Cl₃, that each mole of the compound consists of 2 moles of Cr. Thus,
moles of Cr = moles of Cr₂Cl₃ x 2
= 0.3155 x 2

= 0.631 mole of Cr

4- c, because all matter stays the same no matter what. it is still there. 5- b, because matter is known as mass. 6-c because, flammability is a chemical property. malleability is changing the shape of an object.