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3 years ago

How to solve a chemistry problem?

Chemistry

1 answer:

Kazeer [188]3 years ago

8 0

Answer:

whats the question

Explanation:

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How many grams of hydrogen reacts with 32 g of oxygen to produce 34 g of hydrogen peroxide

nordsb [41]

Answer:

2 grams.

Explanation:

H2 + O2 ---> H2O2

Using molar masses:

2*1 g hydrogen reacts with 2*16 g oxygen.

so 2g H2 reacts with 32 g O2.

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3 years ago

Mechanical waves are classified according to

Natasha_Volkova [10]

mechanical waves are classified by how they move. there are two types of mechanical waves:transverse waves and longitudinal waves.

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3 years ago

In which of these samples do the molecules most likely have the most kinetic energy?

hichkok12 [17]

Answer:

water vapor

Explanation:

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3 years ago

1. Determine the final volume of a 1.5 M HCl solution prepared from 20.0 mL

nadezda [96]

Explanation:

Because molarity is classified as moles of solute per liter of water, dilution of the water may result in a reduction of its concentration.

Therefore, because the amount of moles of solute has to be constant for dilution, you will use the molarity and volume of that same target solution to calculate how many moles of solute will be present in the sample of the stock solution that you dilute.

c = $\frac{n}{v}$

⇒ n = c ⋅ V

$n_{HCL}$ = 0.250 M ⋅ 6.00 L = 1.5 moles HCl

Now all you have to do is figure out what volume of 6.0 M stock solution will contain 1.5 moles of hydrochloric acid

c = $\frac{n}{v}$

V = $\frac{n}{c}$

$V_{Stock}$ = $\frac{1.5 moles}{6.0 \frac{moles}{L} }$ = 0.25 L

Expressed in milliliters, the answer will be

$V_{Stock} = 250ML$ → rounded to two sig figs

7 0

3 years ago

Define fundamental quantities.

Bad White [126]

Answer:

In physics, there are seven fundamental physical quantities that are measured in base or physical fundamental units: length, mass, time, electric current temperature, amount of substance, and luminous intensity.

Explanation:

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3 years ago