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mamaluj [8]
3 years ago
7

The kilogram is the SI unit for mass true or false

Chemistry
1 answer:
Anestetic [448]3 years ago
4 0

Answer:

True

Explanation:

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Which of the following elements in group 1 of the periodic table has the smallest atomic radius?
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The element in group 1 of the periodic table that had the smallest atomic radius is A. Lithium.
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3 years ago
True or False:
lesya [120]

Answer:

False

Explanation:

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2 years ago
How many atoms are in 3.63 mol CH2Cl2?
stira [4]
308 I think? Idek tbh because I hated chemistry
8 0
3 years ago
At 25◦C a 4 L sample of H2 exerts a pressure of 5 atm. What pressure would the same sample exert in a 2 L container at 25◦C?
kykrilka [37]

Answer:

10 atm.

Explanation:

Using the combined gas law equation as follows;

P1V1/T1 = P2V2/T2

Where;

P1 = initial pressure (atm)

P2 = final pressure (atm)

V1 = initial volume (L)

V2 = final volume (L)

T1 = initial temperature (K)

T2 = final temperature (K)

According to the information provided in this question,

P1 = 5 atm

P2 = ?

V1 = 4L

V2 = 2L

T1 = 25°C = 25 + 273 = 298K

T2 = 25°C = 298K

Using P1V1/T1 = P2V2/T2

5 × 4/298 = P2 × 2/298

20/298 = 2P2/298

Cross multiply

298 × 20 = 298 × 2P2

5960 = 596P2

P2 = 5960 ÷ 596

P2 = 10 atm.

4 0
3 years ago
Which of the following measurements is expressed to three significant figures?
tiny-mole [99]
D. is the answer
hope i could help
8 0
3 years ago
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