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2 years ago

If an atom has 17 protons, 15 neutrons, and 20 electrons, what is the atom's electrical charge?

1 answer:

3 0

The overall charge on this ion is -3. Neutrons don’t carry a charge, while protons and electrons carry a net +1 and -1 charge, respectively. In this case, the electrons outweigh the protons by 3, making the overall charge -3.

Hope this helps!

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Which element could not form in the sun and would have to be formed in a supernova?.

sasho [114]

Uranium, most uranium does derive from a star. However, not from our sun.

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1 year ago

Analyze the map. How would the temperature on the east coast of South America (near Brazil) differ from the west coast of South

hjlf

Answer: Uruguay on north on the Atlantic side, Chile and north on the Pacific side. The higher up you go the warmer, so Brazil, Ecuador, and Colombia will be the warmest especially in terms of water temperature.

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2 years ago

Read 2 more answers

A 3.82 g piece of limestone contains 2.62 g of CaCO3

Kobotan [32]

Considering the definition of percentage by mass, the mass percentage of CaCO₃ is 68.59%.

<h3>What is mass percentage</h3>

The percentage by mass expresses the concentration and indicates the amount of mass of solute present in 100 grams of solution.

In other words, the percentage by mass of a component of the solution is defined as the ratio of the mass of the solute to the mass of the solution, expressed as a percentage.

The percentage by mass is calculated as the mass of the solute divided by the mass of the solution, the result of which is multiplied by 100 to give a percentage. This is:

$mass percentage=\frac{mass of solute}{mass of solution}x100$

<h3>Mass percentage of CaCO₃</h3>

In this case, you know:

mass of CaCO₃: 2.62 grams
mass of limestone: 3.82 grams

Replacing in the definition of mass percentage:

$mass percentage=\frac{2.62 grams}{3.82 grams}x100$

<u><em>mass percentage= 68.59 %</em></u>

Finally, the mass percentage of CaCO₃ is 68.59%.

Learn more about percentage by mass:

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7 0

1 year ago

What is the formula for the aqueous salt produced when hydroiodic acid is neutralized by potassium hydroxide?

coldgirl [10]

Answer:

KOH(aq) + HCI(aq) -----> KCI(aq )+ H2O

base acid salt water

hope this helps :)

Explanation:

5 0

3 years ago

Write the molecular formula for the compound that exhibits a molecular ion at M+ = 112.0499. Assume that C, H, N, and O might be

navik [9.2K]

Answer:

C₆H₁₀NO

Explanation:

In order to arrive at a molecular formula we have to make some assumptions and they are

Assuming there is one ( 1 ) N and one ( 1 ) O that is present in the said molecule

Total mass = 29.998

next step: subtract the total mass from 112.0499 = 82.501

next : assume the presence of 6 carbon atoms in said molecule

Total mass = 6 * 12 = 72

Mass of Hydrogens = 82.501 - 72 = 10.501

∴ number of hydrogens = 10.501 / 1.0078 ≈ 10

Hence Total mass = 29.998 + 82.501 ≈ 112.0499

Finally Molecular formula = C₆H₁₀NO

3 0

2 years ago