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3 years ago

11

Chemistry

1 answer:

Gwar [14]3 years ago

5 0

Answer:

<h2>The answer is 2.52 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume} \\$

From the question

mass of object = 15.9 g

volume = final volume of water - initial volume of water

volume = 56.3 - 50 = 6.3 mL

It's density is

$density = \frac{15.9}{6.3} \\ = 2.523809...$

We have the final answer as

Hope this helps you

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Sodium hydroxide is available commercially as a 50.0% by weight aqueous solution. The density of the solution is 1.53 g/mL. Calc

bulgar [2K]

Answer:

[NaOH] = 19.1 M

Last option.

Explanation:

Sodium hydroxide is available commercially as a 50.0% by weight aqueous solution.

50% by weight means, that in 100 g of solution we have 50 grams of solute.

Molar mass of solute: 40 g/m

Mass / Molar mass = moles

50 g / 40 g/m = 1.25 moles

These are the moles of solute in 100 grams of solution, so we must use density data, so we can find out our volume.

Solution density = Solution mass / Solution volume

1.53 g/mL = 100 g / Solution volume

Solution volume = 100 g / 1.53 g/mL

Solution volume = 65.3 mL

1.25 moles of solute are in 65.3 mL of solution

Molarity = moles /L

Let's convert 65.3 mL in L

65.3 / 1000 = 0.0653 L

1.25 moles /0.0653 L = 19.1 M

3 0

4 years ago

A 346.9 ml sample of carbon dioxide was heated to 381 k. if the volume of the carbon dioxide sample at 381 k is 596.2 ml, what w

kolbaska11 [484]

The temperature at 346.9 ml is calculated using Charles law formula

that is V1/T1= V2/T2

T1= 381 K
V1= 596.2 ml
V2 = 346.9 ml
T2=?
by making T2 the subject of the formula T2= T1V2/V1

T2 = 381 x 346.9/596.2 = 221.69 K

5 0

3 years ago

Properties of solids depend on:

ikadub [295]

Answer:intra and intermolecular force of attraction

Explanation:

8 0

3 years ago

Calculate the total heat flow, qtotal, when 15.0 g of water is cooled from 115°C to -20.0°C. The heat of fusion of water is 335

svet-max [94.6K]

Answer:The dependence of the density, viscosity, and heat capacity of a gas on the temperature. ... C-±r*j~d. (1.19). It Is very difficult to use Equation (1.19) for arbitrary quantities. Oi due tc the ... Equation (1.39) Is also valid for polyatomic g~ases whose tmolecules ... Nikuradze which involved the flow of water in long cylindrical tubes.

Explanation:

5 0

3 years ago

Question 16 unsaved what is the density of a substance with a mass of 45.00 g and a volume of 26.4 ml?

NNADVOKAT [17]

Density=mass/volume
density=45/26.4
density=1.7g/ml

6 0

4 years ago