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Papessa [141]
4 years ago
5

Star in the prime of its life, middle-aged

Chemistry
2 answers:
zloy xaker [14]4 years ago
8 0

Answer:

Stellar evolution is the process by which a star changes over the course of time. Depending on the mass of the star, its lifetime can range from a few million ... All stars are formed from collapsing clouds of gas and dust,

Explanation:

nata0808 [166]4 years ago
3 0

Answer:

I agree :)

Explanation:

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Condensation point and freezing point of argon in KELVIN.
vesna_86 [32]

Answer:

Condensation: 423.3 K

Freezing: 83.96 K

(this is all i could figure out :) hope it helps)

4 0
3 years ago
Atoms of the main group elements either gain or lose electrons so they have eight electrons in the outermost energy level. In
Yuliya22 [10]

Answer:

Hey there can you post the complete question ,i cannot find any element

8 0
3 years ago
PLZ HELP ASAP IWILL GIVE BRAINLIEST coastline on Earth experienced a high tide at 6 a.m. At what approximate time will the next
lesya692 [45]

Answer: -

The next low tide occur at 12 noon, because the coastline will turn 90 degrees from the moon.

Explanation: -

Time taken for the earth to rotate = 24 hours.

Each day there are two high tides and low tides.

Thus the duration between two high tides is 12 hours and between 1 high tide and 1 low tide is 6 hours.

Thus the time of next low tide is 6 am + 6 hours = 12 noon.

Now in 24 hours the coastline turns 360 degrees.

In 6 hours it will travel (360 x 6) / 24 =90 degrees.

Thus the next low tide occur at 12 noon, because the coastline will turn 90 degrees from the moon.

8 0
3 years ago
Read 2 more answers
Which of the following is one of the energy conversions taking place in a campfire? Heat to light Heat to kinetic Chemical to li
Blizzard [7]

Answer:Heat to Light

Explanation:

8 0
3 years ago
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2 NH3 + 3 CuO --> 3 Cu + N2 + 3 H2O
Gnom [1K]

<u>Answer:</u> 0.5 moles of N_2 are produced in the reaction

<u>Explanation:</u>

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

The equation used is:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}} ......(1)

Given mass of CuO = 113.6 g

Molar mass of CuO = 79.5 g/mol

Plugging values in equation 1:

\text{Moles of CuO}=\frac{113.6g}{79.5g/mol}=1.43 mol

For the given chemical reaction:

2NH_3+3CuO\rightarrow 3Cu+N_2+3H_2O

By the stoichiometry of the reaction:

If 3 moles of CuO produces 1 mole of N_2

So, 1.43 moles of CuO will produce = \frac{1}{3}\times 1.43=0.476=0.5mol of N_2

Hence, 0.5 moles of N_2 are produced in the reaction

5 0
3 years ago
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