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2 years ago

Hi there, giving brainliest to best answer. no spammers

Chemistry

2 answers:

Juli2301 [7.4K]2 years ago

4 0

Answer:

D. Earth's northern hemisphere is tilted toward the Sun

Explanation:

You can see in the picture above that the northern hemisphere is past the perpendicular to orbit line to the right.

Anna35 [415]2 years ago

4 0

I think it’s A but not sure

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What is the molarity of a solution made by mixing 2.80 g of koh with enough water make 750 ml of solution?

Travka [436]

Molarity is expressed as the number of moles of solute per volume of the solution. We calculate as follows:

2.80 g ( 1 mol / 56.11 g ) = 0.05 mol KOH

Molarity = 0.05 mol KOH / 750 mL ( 1 L / 1000 mL )
Molarity = 0.07 M

Hope this answers the question. Have a nice day.

7 0

3 years ago

If an equilibrium mixture of the three gases at 600K contains 2.92*10^-2 M COCH(g) and 1.76*10^2 M CO, what is the equilibrium

Vlad [161]

Answer:

Explanation:

7 0

3 years ago

What is the main reason that attitudes are more often revealed in spoken rather than written language?

musickatia [10]

I believe the answer is D.

6 0

3 years ago

Given that sodium chloride is 39.0% sodium by mass, how many grams of sodium chloride are needed to have 100.mg of Na present? G

seraphim [82]

Answer: The mass of sodium chloride solution present is 0.256 grams.

Explanation:

We are given:

39.0 % of sodium in sodium chloride solution

This means that 39.0 grams of sodium is present in 100 grams of sodium chloride solution

Mass of sodium given = 100 mg = 0.1 g (Conversion factor: 1 g = 1000 mg)

Applying unitary method:

If 39 grams of sodium metal is present in 100 grams of sodium chloride solution

So, if 0.1 grams of sodium metal will be present in = $\frac{100}{39}\times 0.1=0.256g$ of sodium chloride solution.

Hence, the mass of sodium chloride solution present is 0.256 grams.

8 0

3 years ago

A solution of aqueous ammonium sulfate has a mass of 482 grams. Calculate the mass of ammonium sulfate in solution if the mass p

umka2103 [35]

Answer:

The answer to your question is the mass of solute = 53.5 g

Explanation:

Data

mass of solution = 482 g

mass of solute = ?

mass percent = 11.1 %

Mass percent is a unit of concentration. It measures the mass of the solute divided by the total mass of the solution

Process

1.- Write the formula

Mass percent = mass of solute / mass of solution x 100

-Solve for mass of solute

mass of solute = Mass percent x mass of solution / 100

2.- Substitution

mass of solute = 11.1 x 482 / 100

3.- Simplification

mass of solute = 5350.2 / 100

4.- Result

mass of solute = 53.5g

6 0

3 years ago