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s344n2d4d5 [400]
3 years ago
8

Question 11 of 32

Chemistry
2 answers:
aev [14]3 years ago
6 0

Answer:

C

Explanation:

They form hypothesis first, then perform the experiment to test the hypothesis. After multiple experiments, they form a theory.

Thus C is correct

please give thanks by hitting that heart button :)

rjkz [21]3 years ago
5 0

Answer:

C

Explanation:

a hypothesis always comes first

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What mass of carbon dioxide gas occupies a volume of 8.13 L
Natasha_Volkova [10]

Answer:

23.76g

Explanation:

To solve for the mass of carbon dioxide (CO2), let us first obtain the number of mole of CO2.

From the question, the following were obtained:

V = 8.13L

P = 204kPa = 204000Pa

Recall: 101325Pa = 1atm

204000Pa = 204000/101325 = 2atm

T = 95°C = 95 + 273 = 368K

R = 0.082atm.L/K/mol

n =?

PV = nRT

n = PV /RT

n = 2 x 8.13/ 0.082 x 368

n = 0.54mole

Now let us convert 0.54mole of CO2 to gram. This is illustrated below:

Molar Mass of CO2 = 12 + (16x2) = 12 + 32 = 44g/mol

Number of mole of CO2 = 0.54mole

Mass of CO2 =?

Number of mole = Mass /Molar Mass

Mass = number of mole x molar Mass

Mass of CO2 = 0.54 x 44

Mass of CO2 = 23.76g

7 0
4 years ago
What is the empirical formula of a molecule containing 18.7% lithium, 16.3% carbon, and 65% oxygen?
aliya0001 [1]
Li2CO3 ; variance= 1.26x10^-3
8 0
3 years ago
How does gases exert pressure
Slav-nsk [51]

Answer:

The molecules are continually colliding with each other and with the walls of the container. When a molecule collides with the wall, they exert small force on the wall The pressure exerted by the gas is due to the sum of all these collision forces. The more particles that hit the walls, the higher the pressure.

3 0
3 years ago
Write the formula used to convert degrees Celsius to kelvins
Misha Larkins [42]
Example : 30 ºC in  <span>in kelvin
</span>
<span>ºC + 273.15
</span>
30 + 273.15 => 303.15 K

8 0
4 years ago
Al + Ni(NO3)2 + Al(NO3)3 + Ni
Sauron [17]

Answer:

Aluminum + Nickel(Ii) Nitrate = Nickel + Aluminum Nitrate

Explanation:

4 0
3 years ago
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