chem 1
問題一覧
1
Endothermic
2
What substance is a pure compund
water
3
How many significant figures are in 0.00620
3
4
What change is a chemical change
a forest fire
5
Around the number 89.04997
89.0
6
Perform this multiplication to the correct number of significant numbers : 65.2 x 0.0015 x 12.02
1.2
7
Convert 2855 mg to kg
2.855 x 10-3 kg
8
Express the number 0.000042
4.2 x 10-5
9
A runner runs 4875 ft in 6.85 minutes. What is the runners average speed in miles per hour ? ( 1 mi =5280 ft)
8.09
10
What is the edge length of a 155 g iron cube ? The density of iron is 7.86 g/cm3 , and the volume of the cube is equal to the edge of the length cubed
2.70
11
Which process is endothermic ?
The melting of ice in a soft drink
12
A 35 g sample of potassium completely reacts with chlorine to form 67 g potassium chloride. How many grams of chlorine reacted ?
32
13
Convert the boiling point of water (100.00 C ) to Kelvin
373.15
14
How much heat must be absorbed by 125 g of ethanol to change its temperature from 21.5 C to 34.8 C ? The specific heat capacity if ethanol is 2.46 J/g C
4.09
15
A graduated cylinder has markings every millimeter . Which measurement is accurately reported for this graduated cylinder
21.3
16
Where can you find chemicals
17
How many significant figures are in 0.00023040
5
18
1 liter of water is
1000 mL
19
perform this calculation to the correct number of significant figures 78.222 x (12.02 - 11.52 )
39
20
If a can of soup contains 22 oz of soup , How many grams of soup is that ? ( 1 lb =0.454 kg 16 oz , 1b = 454 g)
624
21
What is the density of a sample of mineral oil if 240 mL has a mass of 0.23 kg
0.0092
22
An atom is made of ONLY protons and electrons
False
問題一覧
1
Endothermic
2
What substance is a pure compund
water
3
How many significant figures are in 0.00620
3
4
What change is a chemical change
a forest fire
5
Around the number 89.04997
89.0
6
Perform this multiplication to the correct number of significant numbers : 65.2 x 0.0015 x 12.02
1.2
7
Convert 2855 mg to kg
2.855 x 10-3 kg
8
Express the number 0.000042
4.2 x 10-5
9
A runner runs 4875 ft in 6.85 minutes. What is the runners average speed in miles per hour ? ( 1 mi =5280 ft)
8.09
10
What is the edge length of a 155 g iron cube ? The density of iron is 7.86 g/cm3 , and the volume of the cube is equal to the edge of the length cubed
2.70
11
Which process is endothermic ?
The melting of ice in a soft drink
12
A 35 g sample of potassium completely reacts with chlorine to form 67 g potassium chloride. How many grams of chlorine reacted ?
32
13
Convert the boiling point of water (100.00 C ) to Kelvin
373.15
14
How much heat must be absorbed by 125 g of ethanol to change its temperature from 21.5 C to 34.8 C ? The specific heat capacity if ethanol is 2.46 J/g C
4.09
15
A graduated cylinder has markings every millimeter . Which measurement is accurately reported for this graduated cylinder
21.3
16
Where can you find chemicals
17
How many significant figures are in 0.00023040
5
18
1 liter of water is
1000 mL
19
perform this calculation to the correct number of significant figures 78.222 x (12.02 - 11.52 )
39
20
If a can of soup contains 22 oz of soup , How many grams of soup is that ? ( 1 lb =0.454 kg 16 oz , 1b = 454 g)
624
21
What is the density of a sample of mineral oil if 240 mL has a mass of 0.23 kg
0.0092
22
An atom is made of ONLY protons and electrons
False