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3 years ago

HEEEEEEEEEEEEEEELLLLLLLLLLLLPPPPPPP!!!!!!! I WILL MARK BRAINLIEST IF YOU HELP!!!!THIS IS DUE SOON!

Chemistry

1 answer:

Hitman42 [59]3 years ago

3 0

Answer:

An ice pack uses friction and the chemicals inside make it mix to make it cold

Explanation:

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You need to decontaminate water cans previously used for nonpotable water. You calculate that five gallons of disinfecting solut

grandymaker [24]

Answer:

Five ampules

Explanation:

An ampule of calcium hypochlorite should be mixed with water to make a gallon of the solution for disinfectant.

7 0

3 years ago

What is the molarity of a solution that contains 20 grams of salt dissolved in 3.0 L of solution? The molar mass of water is 18g

natita [175]

Number of moles :

n = mass solute / molar mass

n = 20 / 18

n = 1.111 moles

Therefore:

Molarity = moles solute / volume

Molarity = 1.111 / 30 => 0.37 M

6 0

4 years ago

Read 2 more answers

Farmer brown is planting crops in his feild s. He wants to prevent the topsoil from being blown away by the wind or washed away

Ratling [72]

Hey!

I would say the answer is A. Plow the soil many times to lessen the chance of the topsoil being blown away.

Hope this helps !

4 0

3 years ago

Read 2 more answers

What does it mean for a strong base to be in equilibrium

bonufazy [111]

The position of equilibrium lies far to the right, with products being favored.

8 0

3 years ago

Determine the ground-state electron configuration for each of the following elements: A. chlorine ______________________________

ki77a [65]

In ground-state electron configuration, the principal quantum number (n), the orbital (s, p, d, or f), and the total number of electrons are used to represent electron configurations.

Case 1 Ground-state electron configuration of elements.

A) Chlorine: 1s²2s²2 $p^{6}$ 3s²3 $p^{5}$

B) Cesium: 1s² 2s²2p⁶ 3s²3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ 6s¹

C) Vanadium: 1s²2s²2p⁶3s²3p⁶3d³4s²

D) Rhenium: 1s² 2s² 2p⁶ 3s² 3p⁶3d¹⁰ 4s²4p⁶ 4d¹⁰ 5s² 5p⁶ 4f¹⁴ 5d⁵ 6s²

Case 2 : Number of valence electron in atoms

A) Sn -Tin - Four valence electrons

B) La - Lanthanum - Three valence electrons

C) Mn - Manganese - Seven valence electrons

D) Zn- Zinc - Two valence electrons

Case 3 Ground-state electronic configuration of ions

A) Co⁺³ : 1s² 2s² 2p⁶ 3s² 3p⁶4s¹3d⁵

B) Mo⁺² : 1s² 2s² 2p⁶3s²3p⁶ 4s² 3d¹⁰ 4p⁶5s² 4d²

C) Ra⁺² : 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 6s² 6p⁶

D) I⁻ : 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶

Learn more about Quantum numbers here brainly.com/question/2292596

#SPJ4

8 0

2 years ago