Answer:
Lactose comprises the monosaccharides glucose and galactose and maltose, comprising two glucose molecules, which occurs in barley, wheat, and malt.
Explanation:
1) Calcium carbonate contains 40.0% calcium by weight.
M(CaCO₃)=100.1 g/mol
M(Ca)=40.1 g/mol
w(Ca)=40.1/100.1=0.400 (40.0%)!
2) Mass fraction of this is excessive data.
3) The solution is:
m(Ca)=1.2 g
m(CaCO₃)=M(CaCO₃)*m(Ca)/M(Ca)
m(CaCO₃)=100.1g/mol*1.2g/40.1g/mol=3.0 g
There are
4.517
⋅
10
23
atoms of Zn in 0.750 mols of Zn.
Answer:
4 × 10-2
(scientific notation)
= 4e-2
(scientific e notation)
= 40 × 10-3
(engineering notation)
(thousandth; prefix milli- (m))
Explanation:
All of the anwsers
