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Oliga [24]
3 years ago
15

(Only answer if you’re for certain) Which type of molecule is shown below?

Chemistry
2 answers:
svet-max [94.6K]3 years ago
5 0

Answer: Alkene

Explanation: Apex

polet [3.4K]3 years ago
4 0

i believe B is the answer

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What volume of 6.00m hcl can be made from 319 ml of 6.80m hcl?
velikii [3]
So the mole number of 319 ml of 6.80 M HCl is 6.80*319*10^(-3)=2.17 mol. So the volume of 6.00 M HCl needed is 2.17/6.00=0.362 L=362 ml
8 0
4 years ago
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Why is studying atoms and their parts and particles helpful to people?
ddd [48]
The study of atomic structure helps us understand more about the way the universe is constructed, how our bodies are made, and the components of life, which we can apply to other sciences in the fields of: health and disease prevention, fuels, product industry etc... It basically helps us to understand how we can make new things and how to utilize the power of the universe.
3 0
3 years ago
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A sample of a vapor occupies a volume of 500 mL at 65°C. If pressure remains constant, what is the volume of the gas at standard
DedPeter [7]

Answer:

403 mL

Explanation:

First, I will assume that the mole is 1, because you are not specifing this.

Now, with the innitial data, we need to get the pressure:

T = 65+273 = 338 K

V = 500 / 1000 = 0.5 L

Now if:

PV = nRT

Then:

P = nRT/V   and V = nRT/P

Let's calculate the P:

P = 1 * 0.082 * 338 / 0.5 = 55.432 atm

The standard temperature is 0° C or 273 K so, the volume is:

V = 1 * 0.082 * 273 / 55.432

V = 0.40384 L or simply 403.84 mL

8 0
3 years ago
How many molecules are in 6.20 moles of CaCO3?
DedPeter [7]

Answer:

Moles to Grams caco3

1 mole is equal to 1 moles CaCO3, or 100.0869 grams.

6 0
3 years ago
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solution contains 174 grams of lithium bromide in 360 grams of water, what is the mole fraction of lithium bromide
Luba_88 [7]

Answer:

       \large\boxed{\large\boxed{0.091}}

Explanation:

The<em> mole fraction</em> of a component in a mixture is the number of moles of the component divided by the total number of moles of all the components, multiplied by 100.

The symbol X is used to represent the mole fraction.

            X_A=\dfrac{\text{number of moles of component A}}{\text{number of moles of all the components}}\times 100

<u />

<u>1. Convert masses in grams to number of moles</u>

Formula:

  • number of moles = mass in grams / molar mass

a) Lithium bromide

  • Chemical Formula: LiBr
  • Molar mass: 86.845 g/mol

       \text{Number of moles}=\dfrac{174g}{86.845g/mol}=2.00mol

b) Water

  • Chemical formula: H₂O
  • Molar mass: 18.015 g/mol

      \text{Number of moles}=\dfrac{360g}{18.015g/mol}=19.98mol\approx 20.0mol

c) Total number of moles = 2.00 mol + 20.0 mol = 22.0 mol

<u>2. Mole fraction of lithium bromide</u>

           \text{Mole fraction of lithium bromide}=\dfrac{2.00}{22.0}=0.091

5 0
3 years ago
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