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riadik2000 [5.3K]
3 years ago
8

What is the correct meaning of the word catapult?

Chemistry
2 answers:
Aleks [24]3 years ago
3 0

Answer:

A. hamper

Explanation:

i did this question before.

Marianna [84]3 years ago
3 0

Answer:

Improve

Explanation:

They improved Washington's rank so that he could rise to the top.

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Which of these is a way that bio stimulation can be used ?
Aneli [31]

Answer:

To combat the spread of invasive species

hope that helped <3

6 0
3 years ago
How many molecules are in 3.8 mols of copper?
ioda

Answer:

Hi there!

The correct answer is 2.29 x 10^{24} molecules

Explanation:

To convert from the moles to molecules:

1 mole = 6.022 x 10²³ molecules

so basically you multiply 3.8 by 6.022 x 10²³

and you get: 2.29 x 10^{24}

5 0
4 years ago
How many neutrons are present in 1 atom of chlorine?
pav-90 [236]
The answer is A.18 let me know if you want an explanation
4 0
3 years ago
Read 2 more answers
The heat capacity of air is much smaller than that of water, and relatively modest amounts of heat are needed to change its temp
LekaFEV [45]

Answer:

Q=9.2x10^5J

t=614s=10.2min

Explanation:

Hello,

In this case, we can compute the energy by using the following formula for air:

Q=nCp\Delta T

Whereas the moles of air are computed via the ideal gas equation at room temperature inside the 5.5m x 6.5m x 3.0m-room:

n=\frac{PV}{RT}\\\\V=5.5m*6.5m*3.0m=107.25m^3*\frac{1000L}{1m^3}=107250L\\ \\n=\frac{1atm*107250L}{0.082\frac{atm*L}{mol*K}*298.15K}\\ \\n=4386.8mol

Now, we are able to compute heat, by considering that the temperature raise is given in degree Celsius or Kelvins as well:

Q=4386.8mol*21\frac{K}{mol*K}*10K \\\\Q=9.2x10^5J

Finally, we compute the time required for the heating by considering the heating rate and the required heat, shown below:

t=\frac{9.2x10^5J}{1.5\frac{kJ}{s}*\frac{1000J}{1kJ} } \\\\t=614s=10.2min

Regards.

8 0
3 years ago
Write 5.5 x 104 in standard form
taurus [48]

Answer: 55,000

<u>Explanation:</u>

Scientific Notation: 5.5 x 10⁴

Standard form: move the decimal 4 places to the right

                         5 5 0 0 0 0.

                      =  55,000

7 0
3 years ago
Read 2 more answers
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