2 years ago

1) What is the electron configuration of the element with 27 protons?

1 answer:

6 0

1) cobalt u can tell bc on a periodic table there is a small number that on cobalt is 27.

2) think that would be 11 bc in the 4th shell there can be up to 18 electrons

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13. How many moles of zinc are in 25.00 g Zn?

topjm [15]

0.3824 moles of Zinc

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2 years ago

Enter the balanced NET IONIC equation for the potentially unbalanced equation AgNO3(aq)+NaCl(aq)→AgCl(s)+NaNO3(aq).

Zigmanuir [339]

Answer:

$Ag^+(aq)+Cl^-(aq)\rightarrow AgCl(s)$

Explanation:

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In this case, since the net ionic equations are ionic representations of the molecular equation in which the spectator ions (those at both reactants and products sides) are cancelled out, we first write the complete ionic equation for this reaction, considering that the solid silver chloride is not ionized due to its precipitation:

$Ag^+(aq)+NO_3^-(aq)+Na^+(aq)+Cl^-(aq)\rightarrow AgCl(s)+Na^+(aq)+NO_3^-(aq)$

Whereas the nitrate and sodium ions are cancelled out for the aforementioned reason as they are the spectator ions, to obtain:

$Ag^+(aq)+Cl^-(aq)\rightarrow AgCl(s)$

Which is the required net ionic equation.

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2 years ago

Positive ions are called _____, and negative ions are called _____.

Artemon [7]

Answer:

Option B.

Explanation:

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2 years ago

Read 2 more answers

Magnesium combines with oxygen to form magnesium oxide. If 10.57 g of

Phantasy [73]

The total mass is 10.57+6.96=17.53 g.

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The percent by mass of oxygen is (6.96)/(17.53) * 100 = 39.7%

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1 year ago

VARVARA [1.3K]

Answer:

Explanation:

the number of protons never changes even if the atomic mass changes

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2 years ago