10)
If 150.0 grams of sucrose (C12H22O11) is dissolved in 1.50 L of water, what is the MOLALITY of the solution?

A)
0.010 m
B)
0.292 m
Eliminate
C)
0.438 m
D)
1.00 m

If 45.0 g of C6H12O6, are dissolved in 215 g of H2O, what will be the boiling point of the resulting solution?

(Kb= 0.52oC/m)

A)
100.00oC
B)
100.22oC
C)
100.60oC
D)
112.35oC

James found that 10.0 mL of a 0.50 M NaOH solution were required to completely titrate 20.0 mL of an unknown concentration H2SO4 solution. What is the concentration of the H2SO4 solution?

A)
0.125 M
Eliminate
B)
0.250 M
C)
0.500 M
D)
0.750 M

10) B

Explanation:

0.292 m

The molar mass of sucrose = 342.3

g

mol

150.0g

342.3

g

mol

= 0.438 mol

0.438 mol

1.50 kg

= 0.292m

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.