Options:
- A. 53.4 grams
- B. 54.4 grams
- C. 55.4 grams
- D. 56.4 grams
View Answer
B. 54.4 grams
Chemistry
Marsh gas is_______?
Options:
- A. Nitrogen
- B.
- C.
- D.
View Answer
C.
How many moles are in 22.2 grams of Calcium chloride, CaCl2?
Options:
- A. 0.2 moles
- B. 0.3 moles
- C. 0.4 moles
- D. 0.5 moles
View Answer
A. 0.2 moles
Potassium Permanganate is used for purifying drinking water, because_________?
Options:
- A. It is a sterilising agent.
- B.
- C.
- D.
View Answer
D.
What is the mass percent of silver in silver notrate, AgNO3?
Options:
- A. 64.5%
- B. 65.6%
- C. 63.5%
- D. 61.5%
View Answer
C. 63.5%
Find the PH of a 0.001 M solution of Nitric acid HNO3?
Options:
- A. 2
- B. 3
- C. 4
- D. 5
View Answer
B. 3
A sample of an iron and oxygen ore has a mass of 35.8 grams. The iron in the compound has a mass of 27.9 grams. What is the percent iron in the ore?
Options:
- A. 74% Fe
- B. 75% Fe
- C. 77% Fe
- D. 78% Fe
View Answer
D. 78% Fe
Which set of quantum numbers is not allowed?
Options:
- A. n=2,l=1,m1=0,ms=+1/2
- B. n=2,l=1,m1=-1,ms=+1/2
- C. n=2,l=0,m1=0,ms=-1/2
- D. n=2,l=2,m1=1,ms=-1/2
View Answer
D. n=2,l=2,m1=1,ms=-1/2
What is the density ofargon gas at a temperature of 30
Options:
- A. 1.65 g/L
- B. 1.67 g/L
- C. 1.68 g/L
- D. None of the above
View Answer
C. 1.68 g/L
The purpose of Smelting an ore is to________?
Options:
- A. Reduce it
- B. Oxidize it
- C. Obtain an alloy
- D. Separate volatile impurities
View Answer
A. Reduce it