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3 years ago

What is the charge on an ion that has an atomic number of 16 and contains 14e-?

1 answer:

3 0

The answer would be 2+ since the atomic number represents how many protons are in the element. In this case, there are 16 protons, but only 14 electrons, which means there are an additional 2 protons, hence the 2+ charge on the ion.

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How many grams of oxygen are needed to

Paraphin [41]

Answer:

The value is $M_{o} = 175 g$

Explanation:

Generally the reaction between oxygen and magnesium is

$2Mg_{({s})} + O_2_{(g)} \to 2MgO_{(s)}$

Generally from the law of mass conservation in a chemical reaction we have that

$M_{m} + M_{o} = M_{z}$

Here $M_{m}$ is the mass of magnesium

$M_{o}$ is the mass of oxygen

$M_{z}$ is the mass of magnesium oxide

$425+ M_{o} = 600$

=> $M_{o} = 600 - 425$

=> $M_{o} = 175 g$

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4 years ago

Remember the three roadmaps and how to use them.

Marina CMI [18]

Answer:

Build Custom Roadmaps, Idea Management, Reports Dashboards. 75+ Templates. Keep Collaborators Informed With Beautiful Custom Roadmaps. 75+ Templates. Crowd-source Ideas. Prioritize Features. Manage Requirements. Build Better Products. Build Roadmaps.

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4 years ago

43. Use Table 3-1 to identify a substance that undergoes a

LuckyWell [14K]

Answer:

Oxygen, and from solid to liquid. This is because oxygen's melting point is at -218°C. Melting point refers to the temperature where heat causes particles to vibrate with sufficient energy to break the solid structure, so for oxygen this means it's being turned into a liquid.

4 0

3 years ago

About one-third of the toxic metal, mercury (Hg), is released into the air from natural sources, such as rocks, soil, volcanoes,

Stolb23 [73]

Answer:

Two-third of the toxic metal, mercury comes from gold mining.

Explanation:

During gold mining small pieces of gold which are within the soil are separated with the help of mercury. Both gold and mercury are mixed and they forms amalgam. Further gold can be extracted by vaporizing the mercury, thus releasing it into air and contributing to two-third of the air pollution by human activities.

Therefore (d) gold mining is the correct answer.

7 0

3 years ago

How many moles of O2 are made from 4 moles of H2O

algol13

Eight moles of O2 are found in 4 moles of H2O

3 0

3 years ago