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podryga [215]
4 years ago
15

An ion of the element oxygen (O) has an overall charge of 2−. Therefore, the number of electrons in this oxygen ion is An ion of

the element oxygen (O) has an overall charge of 2−. Therefore, the number of electrons in this oxygen ion is ______
Chemistry
2 answers:
BARSIC [14]4 years ago
6 0

Answer:

6

Explanation:

Normally, oxygen has 8 electrons and 8 protons. If the charge is 2-, then that means there are two more protons than electrons. There would be 6 electrons.

Delvig [45]4 years ago
6 0

Answer:

The answer is 10

Explanation:

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How many grams of KCl are needed to prepare 1.00 L of a 2.00 M solution
Andrej [43]
Use the concentration and molar mass.

1.00 L (2.00 mol KCl/1 L)(74.6 g/ 1 mol KCl)= 149.2 grams

So, you need about 149 grams of KCl dissolved in 1 liter of water to prepare a 2.00 M solution. 
8 0
3 years ago
Ok so I have 3 beakers of clear liquid each holding a different substance, Water, Magnesium Sulphate and Sodium Carbonate how ca
nataly862011 [7]
For water you could add oil..ex: cooking oil separates form water because water is heavier than oil.

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7 0
4 years ago
addition of sulfurous acid (a weak acid) to barium hydroxide ( a strong base) results in the formation of a precipitate. The net
Trava [24]

net ionic equation:

SO₄²⁻ (aq) + Ba²⁺ (aq) → BaSO₄ (s)

Explanation:

We have the following chemical reaction:

H₂SO₄ (aq) + Ba(OH)₂ (aq) → BaSO₄ (s) + 2 H₂O (l)

Now we write the ionic equation:

2 H⁺ (aq) + SO₄²⁻ (aq) + Ba²⁺ (aq) + 2 OH⁻ (aq) → BaSO₄ (s) + 2 H⁺ + 2 OH⁻ (aq)

We remove the spectator ions to obtain the net ionic equation:

SO₄²⁻ (aq) + Ba²⁺ (aq) → BaSO₄ (s)

where we have:

(aq) - aqueous

(s) - solid

(l) - liquid

Learn more about:

net ionic equation

brainly.com/question/7018960

#learnwithBrainly

7 0
3 years ago
Use the drop-down menus to match the name and structure for the following cycloalkanes. A five-sided polygon. A square. A five-s
Mashutka [201]

Answer:

A five-sided polygon.- cyclopentane

A square.- cyclobutane

A five-sided polygon with one line extending from a point.- methylcyclopentane

A 6-sided polygon with a line extending from one point to a C H 3.- methlcyclohexane

Explanation:

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3 years ago
exothermic reaction in which the reaction releases energy as heat. 4. How would the reaction would change if you added 2 g of st
Margaret [11]

Answer:

Explanation:

We know that the composition of Steel includes Carbon and Iron. So, if 2g of steel wool was added to the iron acetate, then the iron acetate is now being reduced. What will happen is that the solution will be triggered as it becomes denser and get highly concentrated. Hence, an increase in concentration leads to a decrease in reaction rates. Thus, a slow reaction will take place, and the reaction rate will decrease.

6 0
3 years ago
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