3 years ago

Why is rusting a chemical change?

1 answer:

6 0

Rusting is a chemical change because it is two substances reacting together to make a new substance. It also has broken and rearranged compounds and usually doesn't simply change back to normal easily or at all. Is that too much or is it good?

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How many protons does one atom of sulfur have

mrs_skeptik [129]

Answer:

Explanation:

The proton number is always the number in the corner of the box on a periodic table

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4 years ago

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den301095 [7]

C₂H₂ + O₂ --> CO₂ + H₂O

when balanced

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4 years ago

Give two possible sets of four quantum numbers for the electron in hydrogen when it is in its lowest energy state.

konstantin123 [22]

Answer:

Explanation:

The electron in the lowest energy state will be found in 1 s energy level.

set of 4 possible quantum numbers

Principal quantum no : n = 1 ,

Azimuthal quantum no l = 0

Magnetic quantum no m = 0

Spin quantum no s = + 1/2

set of other quantum nos

Principal quantum no : n = 1 ,

Azimuthal quantum no l = 0

Magnetic quantum no m = 0

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3 years ago

a chemist wishes to mix some pure acid with some water to produce 16L of a solution that is 30% acid how much pure acid and how

Aloiza [94]

<u>Answer:</u> The volume of acid and water that must be mixed will be 4.8 L and 11.2 L

<u>Explanation:</u>

We are given:

Volume of mixture = 16 L

Percent of acid present = 30 %

Calculating the percentage of acid present in the mixture:

$\Rightarrow 16\times \frac{30}{100}=4.8L$

The mixture is made entirely of acid and water.

Volume of acid in the mixture = 4.8 L

Volume of water in the mixture = 16 - 4.8 = 11.2 L

Hence, the volume of acid and water that must be mixed will be 4.8 L and 11.2 L

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3 years ago

If 26.64 mL of NaOH solution is required to react completely with 0.440 g KHP, what is the molarity of the NaOH solution

dybincka [34]

Answer:

0.08087M

Explanation:

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3 years ago