Question

c. 80
1. Choose the most correct option.
A. A sample of pure water, whatever the
source always contains
by
mass of oxygen and 11.1 % by mass of
hydrogen.
a. 88.8 b. 18
d. 16
B. Which of the following compounds can
NOT demonstrate the law of multiple
proportions ?
a. NO, NO,
c. H,O, H,02 d. Na S, NaF
C. Which of the following temperature
will read the same value on celsius and
Fahrenheit scales.
a.- 40°
b. + 40°
c. -80°
d. -20°
D. SI unit of the quantity electric current is
b. CO, CO2
→ 2NH,
a. Volt
b. Ampere
c. Candela d. Newton
E. In the reaction N2 + 3H,
the ratio by volume of N, H, and NH,
is 1: 3: 2 This illustrates the law of
a. definite proportion
b. reciprocal proportion
c. multiple proportion
d. gaseous volumes
F. Which of the following has maximum
number of molecules ?
a. 7g N, b. 2 g H,
c. 8 g 0 d. 20 g NO
G. How many g of H,0 are present in 0.25
mol of it?
a. 4.5
b.​

Answer 1

Answer:

the mass of hydrogen is 16

B. the law of multiple proportions isNas, Naf

C. the same value in celsius and fahrenheit scale is -20

D. the si unit of electric current is ampere.

E. the law is reciprocal proportion

F. the maximum number of molecules is 8go.

G. 4.5