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3 years ago

What kind of model is a map?

Chemistry

1 answer:

Jobisdone [24]3 years ago

6 0

A map is a physical model

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Which of the following substances is formed deep under earth

EastWind [94]

Answer:

Oil

Explanation:

everything else is above the earth

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2 years ago

Which substance is an electrolyte

Anit [1.1K]

Examples of electrolytes

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3 years ago

A chemist adds of a calcium sulfate solution to a reaction flask. Calculate the mass in grams of calcium sulfate the chemist has

Elanso [62]

The given question is incomplete. The complete question is:

A chemist adds 0.85 L of a 0.0050M calcium sulfate to a reaction flask. Calculate the mass in grams of calcium sulfate the chemist has added to the flask. Round your answer to significant digits.

Answer: The mass in grams of calcium sulfate the chemist has added to the flask is 0.58 g

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

$Molarity=\frac{n}{V_s}$

where,

n = moles of solute

$V_s$ = volume of solution in L

moles of $CaSO_4$ = $\frac{\text {given mass}}{\text {Molar mass}}=\frac{xg}{136g/mol}$

Now put all the given values in the formula of molarity, we get

$0.0050=\frac{x}{136\times 0.85}$

$x=0.58 g$

Therefore, the mass in grams of calcium sulfate the chemist has added to the flask is 0.58 g

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2 years ago

the difference in energy between the n=1 and n=2 energy levels in a hydrogen atom is 1.64x10^-18 J. what happens when an electro

CaHeK987 [17]

Answer:

It emits 1.64 x 10⁻¹⁸J of energy

Explanation:

The n = 1 is a lower quantum level compared to n = 2.

When a hydrogen atom moves from a higher level to a lower one, it simply emits the energy difference between the two levels.

If a hydrogen atom moves from a lower energy level to a higher one such as from 1 to 2, they absorb the energy difference to attain the new excited state.
So, for an electron in the hydrogen atom to move from a higher energy level to a lower one, it must emit 1.64 x 10⁻¹⁸J of energy.

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2 years ago

In a plant, roots absorb water and nutrients. Those materials are then transported to other parts of the plant. Which statements

Fiesta28 [93]

C is the correct anwser

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3 years ago

Read 2 more answers