All categories

3 years ago

Which one is the answer?

Chemistry

2 answers:

Amanda [17]3 years ago

5 0

Answer:

I think a light bulb

Explanation:

please I need brainlist

olga2289 [7]3 years ago

3 0

Answer:

I think 1, 4, and 5 are the answers to this question. I am not sure about 4 though.

Explanation:

You have to have a power source (1), you also have to have a way to get that power somewhere else (5), and the reason for 4 would be that the power has to come back through the power source to remain working.

You might be interested in

The rate constant for this first‑order reaction is 0.550 s−10.550 s−1 at 400 ∘C.400 ∘C. A⟶products A⟶products How long, in secon

Alisiya [41]

Answer:

$t=2.08s$

Explanation:

Hello,

In this case, for first order reactions, we can use the following integrated rate law:

$ln(\frac{[A]}{[A]_0} )=kt$

Thus, we compute the time as shown below:

$t=-\frac{ln(\frac{[A]}{[A]_0} )}{k}=- \frac{ln(\frac{0.220M}{0.690M} )}{0.55s^{-1}} \\\\t=-\frac{-1.14}{0.550s^{-1}}\\ \\t=2.08s$

Best regards.

5 0

3 years ago

What was one idea Dalton taught about atoms?

gizmo_the_mogwai [7]

Explanation:

All atoms of one type were identical in mass and properties.

3 0

3 years ago

Which compound is formed from its elements by an<br> exothermic reaction at 298 K and 101.3 kPa?

kenny6666 [7]

Answer:

H2O(g) (negative)

Explanation:

4 0

3 years ago

Why are fossil fuels still the primary way humans harness power

Lubov Fominskaja [6]

Answer:

Fossil fuels are still the number primary way to harness power because we know how to do it very well and it cost less than other any other way to harness energy

Explanation:

3 0

3 years ago

Explain why noble gasses do not participate in chemical reactions.

andre [41]

Answer: They have too many protons in the nucleus.

Explanation: Noble gas. The noble gases are the chemical elements in group 18 of the periodic table. They are the most stable due to having the maximum number of valence electrons their outer shell can hold. Therefore, they rarely react with other elements since they are already stable.

8 0

3 years ago