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3 years ago

Which of the elements has the same Lewis dot structure as calcium (Ca)?

Chemistry

2 answers:

Vlad1618 [11]3 years ago

6 0

Answer:

$\boxed {\boxed {\sf A. \ Barium (Ba)}}$

Explanation:

Lewis dot structures illustrate the valence electrons in an element.

Valence electrons are the outermost electrons in an atom that bond with other atoms by accepting or releasing electrons.

The groups, or columns, of the Periodic Table have the same number of valence electrons.

Calcium is in group 2.

The other elements in this group are:

Beryllium, Magnesium, Strontium, Barium, and Radium

So, all these elements have the same lewis dot structures because they have the same number of valence electrons.

Based on the answer choices, choice A is correct.

cricket20 [7]3 years ago

3 0

It’s gonna be which ever element(s) that has the same number of valence electrons!!

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a chemist dissolves 0.564 moles of manganese (IV) oxide (MnO2) in water, and adds enough water to make 0.510 L of solution. Calc

ladessa [460]

Answer:

The molarity of the solution is 1.1 $\frac{moles}{liter}$

Explanation:

Molarity is a measure of the concentration of that substance that is defined as the number of moles of solute divided by the volume of the solution.

The molarity of a solution is calculated by dividing the moles of the solute by the volume of the solution:

$molarity=\frac{number of moles of solute}{volume}$

Molarity is expressed in units $\frac{moles}{liter}$

In this case

number of moles of solute= 0.564 moles
volume= 0.510 L

Replacing:

$molarity=\frac{0.564 moles}{0.510 L}$

Solving:

molarity= 1.1 $\frac{moles}{liter}$

The molarity of the solution is 1.1 $\frac{moles}{liter}$

4 0

3 years ago

WILL GIVE YOU BRAINLIEST!!!

Papessa [141]

Answer:

A ability to decompose

B reactivity

Explanation:

Chemical properties are those properties that tell us about what a substance can do as regards to whether or not the substance reacts with other substances.

Examples are flammability, rusting of iron, precipitation, decomposition of water by an electric current.

The ability to decompose and reactivity are chemical properties of a substance.

Physical properties tells us everything about what a substance is when no change is occurring to its constituents.
Examples are state of matter, color, odor, taste, texture, hardness e.t.c

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3 years ago

Read 2 more answers

A reaction was performed in which 3.6 g 3.6 g of benzoic acid was reacted with excess methanol to make 1.3 g 1.3 g of methyl ben

Anit [1.1K]

Answer: The percent yield of the reaction is 32.34 %

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ .....(1)