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vichka [17]
3 years ago
11

Write a CER to explain what happened to this styrofoam head. The pics are of the head above water, at a depth of 1000m underwate

r, and at 3000 m underwater. Talk about the gas laws and/or KMT in your reasoning section!

Chemistry
1 answer:
statuscvo [17]3 years ago
4 0

Answer:

what is that i connot understand your question

Explanation:

im sorry i connot answer your question

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What is the isotope formed during radioactive decay​
vodka [1.7K]

Answer: Except for gamma decay or internal conversion from a nuclear excited state, the decay is a nuclear transmutation resulting in a daughter containing a different number of protons or neutrons (or both). When the number of protons changes, an atom of a different chemical element is created.

Explanation:

6 0
2 years ago
Which statement is not true about the periodic table?
Crazy boy [7]
Answer is A
All elements on the periodic table have a different number of protons that can be represented by its atomic number
4 0
2 years ago
If an atom of the following element had a neutral charge, how many electrons would it have?
Yakvenalex [24]

Answer:

31

Explanation:

In order for an atom to have a neutral charge, it needs to have the same number of protons and electrons. You can see by the illustration that the atomic number is 31, so this element has 31 protons. Knowing that, we also know that it must have 31 electrons to be neutral.

8 0
3 years ago
A mass spectrometer has determined the mass and abundances of all isotopes of an unknown element. The first isotope has a mass o
shepuryov [24]

Answer:

I believe it is Potassium (K)

Explanation:

I did the math on a calculator and it was the closest atomic mass to potassium.

5 0
3 years ago
30,000 J of heat are added to 23.0 kg of steel to reach a final temperature of 140
kolbaska11 [484]

The initial temperature is 137.34 °C.

<u>Explanation:</u>

As the specific heat formula says that the heat energy required is directly proportional to the mass and change in temperature of the system.

Q = mcΔT

So, here the mass m is given as 23 kg, the specific heat of steel is given as c = 490 J/kg°C and the initial temperature is required to find with the final temperature being 140 °C. Also the heat energy required is 30,000 J.

ΔT =\frac{Q}{mc}

ΔT =\frac{30000}{23 \times 490} = \frac{30000}{11270} =2.66

Since the difference in temperature is 2.66, then the initial temperature will be

Final temperature - Initial temperature = Change in temperature

140-Initial temperature = 2.66

Initial temperature = 140-2.66 = 137.34 °C

Thus, the initial temperature is 137.34 °C.

7 0
3 years ago
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