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3 years ago

Help me please!! Best gets brainiest

Chemistry

2 answers:

Kobotan [32]3 years ago

6 0

I would think D it looks right to me idk

Usimov [2.4K]3 years ago

3 0

The virus injects genetic material into the host

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1. Write the chemical equation when excess chloride ion is added to aqueous solution of cobalt chloride. Note observed color of

Aneli [31]

The element cobalt can form compounds in two different oxidation states, +2 and +3.

The +2 state is more common.

The ion Co2+ (aq) is pink.

Other compounds of cobalt(II), which include both anhydrous Co2+ and complex ions, are commonly blue.

If an aqueous solution contains both cobalt(II) and chloride ions, the blue ion CoCl42- forms, in equilibrium with the pink Co2+ (aq) ion.

5 0

3 years ago

How many moles are 4.20 * 10 ^ 25 atoms of Ca?

aleksandr82 [10.1K]

Answer:

~69.744 moles of Ca

Explanation:

Using Avogadro's constant , we know that:

1 mole = 6.022 x 10^23 atoms

S0, the number of moles in 4.20 x 10^25 atoms of Ca:

=(4.20 x 10^25 x 1 )/(6.022 x 10^23)

~69.744 moles of Ca

Q2:How many atoms are in 0.35 moles of oxygen?

1 mole = 6.022 x 10^23 atoms

S0, the number of atoms in 0.35 moles of oxygen:

=[0.35 x (6.022 x 10^23)]

=2.1077 x 10^23 atoms of Oxygen

Hope it helps:)

4 0

3 years ago

The chemical properties of ca are most similar to the chemical properties of ?

EastWind [94]

<span>some elements would be Beryllium, Barium, Magnesium, and Strontium</span>

6 0

3 years ago

Using the correct answer from Part B, calculate the volume of a rectangular prism with a length of 5.6 , a width of 2.1 , and a

erastova [34]

Answer:

The volume of the rectangular prism is 77.616 cm³

Explanation:

Here is the remaining part of the question:

Part B:

What value should you use as the area of the base when calculating the answer to Part C.

Part C:

Using the correct answer from Part B, calculate the volume of a rectangular prism with a length of 5.6 cm , a width of 2.1 cm , and a height of 6.6 cm Part B answer: 11.76 cm^2

Explanation:

The volume of a rectangular prism is given by:

V = l×w×h

Where V is the volume of the rectangular prism

l is the length of the rectangular prism

and w is the width of the rectangular prism

Recall that the Area (A) of the base of the rectangular prism can be calculated by using

A = l × w

Hence, the volume of the rectangular prism can also be calculated by substituting this into the equation to give

V = A × h

From the question, the correct answer from part B for the area of the base is 11.76 cm^2; and the height (h) is 6.6 cm

Hence, the volume of the rectangular prism is

V = A × h

V = 11.76 cm² × 6.6 cm

V = 77.616 cm³

5 0

4 years ago

Who wants to be friends?

nika2105 [10]

Answer:

Meeee

Explanation:

Dis is my new account.

8 0

3 years ago

Read 2 more answers