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zmey [24]
2 years ago
15

Identify the terms described by selecting the correct word from the drop-down menu.

Chemistry
1 answer:
Ksju [112]2 years ago
7 0

Answer: Matter

Biosphere

Explanation:

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A solution is made
Anna11 [10]

Answer:

99.3%

Explanation:

The percent by mass of the solute can be expressed as:

  • % mass = \frac{MassSolute}{MassSolute+MassSolvent} * 100%

And for this problem:

  • Mass of Solute = Mass of sodium lithium chloride = 29 g
  • Mass of Solvent = Mass of Water

So to calculate the percent by mass first we need to <u>calculate the mass of water</u>, to do so we use its<em> density</em> (1 g/L):

  • 202 mL is equal to (202/1000) 0.202 L.

Density water = mass water / volume

  • 1 g/L = mass water / 0.202 L
  • Mass water = 0.202 g

Now we have all the data required to <u>calculate the % mass:</u>

  • % mass = \frac{29g}{29g+0.202g} * 100 % = 99.3%
3 0
3 years ago
Read 2 more answers
With all his gear, Neil Armstrong weighed 360 pounds on Earth. When he landed on the Moon, he weighed 60 pounds. Why?
lyudmila [28]

C. The gravity on the Moon is less than the gravity on Earth.

Explanation:

The weight of Neil Armstrong changed because the gravity on the Moon is less than the gravity on earth. We can infer that the gravity on moon is one-sixth the gravity earth.

  • Mass of Armstrong on earth and moon is the same. Mass is the quantity of matter contained in a substance. Since he has the same quantity of matter on earth and moon, his mass will be the same.

Weight is a function of mass and gravity on a body.

Since his weight reduced, we can infer that the gravity on the moon is lesser:

        Weight = mass x gravity.

Learn more:

Weight and mass brainly.com/question/5956881

#learnwithBrainly

5 0
3 years ago
If y = 15 when x = 60, find y when x = 45.
Delvig [45]
Y=15 x=60
•1/3 •1/3
y=5 x=45
4 0
2 years ago
A 0.334 g sample of an unknown compound occupies 245 ml at 298 K and 1.22 atm. What is the molar mass of the unknown compound.
marysya [2.9K]

Answer:

27.4 g/mol

Explanation:

Assuming the compound is a gas and that it behaves ideally, we can solve this problem by using the <em>PV=nRT formula</em>, where:

  • P = 1.22 atm
  • V = 245 mL ⇒ 245 mL / 1000 = 0.245 L
  • n = ?
  • R = 0.082 atm·L·mol⁻¹·K⁻¹
  • T = 298 K

<u>Inputting the data</u>:

  • 1.22 atm * 0.245 L = n * 0.082 atm·L·mol⁻¹·K⁻¹ * 298 K

<u>Solving for n</u>:

  • n = 0.0122 mol

With the <em>calculated number of moles and given mass</em>, we <u>calculate the molar mass</u>:

  • 0.334 g / 0.0122 mol = 27.4 g/mol
6 0
2 years ago
List 2 of the important properties of gases.
sukhopar [10]
Gasses are easy to compress
And they expand to fill their containers
8 0
3 years ago
Read 2 more answers
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