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Elina [12.6K]
3 years ago
9

HELP!!!!!!!!!!!!!!

Chemistry
2 answers:
romanna [79]3 years ago
8 0

Answer:

The universe is expanding

Explanation:

As long as the amount of stuff doesn't go over a critical threshold, the universe will continue to expand forever, and eventually suffer heat death, freezing out. But if there's too much stuff, the expansion of the universe will slow down and stop. Then the universe will begin to contract.

HOPE IT HELPS :)

PLEASE MARK IT THE BRAINLIEST!

makkiz [27]3 years ago
7 0

Answer:

The universe is expanding

Explanation:

<em>Its expanding in many ways as in technology, mind, life it self, </em>         its all part of a life form in the universe to create more life in earth and other places like the micro organism with the bacteria and the microscopic life form.

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Kia is doing an experiment in science lab. She is given a beaker containing 100 g of liquid. The beaker has markings on the side
vlabodo [156]
The key to solving this problem is density. Density determines the mass of a molecule for a certain volume. Kia is given a beaker containing 100 g which volume is at <span>100 mL mark. Then the density of the liquid would be:
</span>density=mass/volume
density= 100g/ 100ml= 1g/ml

If t<span>he water now comes up to the 50 mL mark, then the weight would be:
</span>density = mass/volume
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3 years ago
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What is an isotope? list the isotopes of hydrogen in order from lighter to heavier. which is the most common among them?
malfutka [58]
Isotopes= a group of atoms with the same no. of protons , but different no. of neutrons

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6 0
2 years ago
What is the percentage composition of each element in hydrogen peroxide, H2O2?
Degger [83]

Answer:

The percentage composition of each element in H2O2 is 5.88% H and 94.12% O (Option D).

Explanation:

Step 1: Data given

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Step 2: Calculate % hydrogen

% Hydrogen = ((2*1.0) / 34.0) * 100 %

% hydrogen = 5.88 %

Step 3: Calculate % oxygen

% Oxygen = ((2*16)/34)

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We can control this by the following equation

100 % - 5.88 % = 94.12 %

The percentage composition of each element in H2O2 is 5.88% H and 94.12% O (Option D).

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2 years ago
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Relative to protons, electrons have:
saw5 [17]

Answer:

<u><em>(B.) a significantly lower mass that protons</em></u>

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The nucleus has a mass of 1 amu and is positively charged.

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3 years ago
What would be the effect on your calculated mas percent recovery of Cu if you did not completely react the Mg in the reaction mi
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The mass percentage would be reduced but not as much as if it were a complete reaction ヽ༼ຈل͜ຈ༽ノ︵┻━┻ mark brainliest please
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