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1 year ago

The density (g/ml) of 6 pennies with a mass of 18.53 grams and a volume of 2.0 ml

Chemistry

1 answer:

dedylja [7]1 year ago

3 0

Answer: 9.27 g/mL

Explanation:

$d=\frac{m}{v}=\frac{18.53}{2.0}=\boxed{9.27 \text{ g/mL}}$

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IceJOKER [234]

Answer:

a)CH4 + O2 = CO2 + H2O

b)4CH4+5O=2CO+8H2O+2C

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2 years ago

When water evaporates, what happens to the molecules that make up the liquid water?

Rama09 [41]

Answer:

Evaporation happens when a liquid substance becomes a gas. When water is heated, it evaporates. The molecules move and vibrate so quickly that they escape into the atmosphere as molecules of water vapor.

Explanation:

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2 years ago

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Now that Snape and Dumbledore has taught you the finer points of hydration calculations they have a slightly more challenging pr

Mrrafil [7]

Answer:

The value of an integer x in the hydrate is 10.

Explanation:

$Molarity=\frac{Moles}{Volume(L)}$

Molarity of the solution = 0.0366 M

Volume of the solution = 5.00 L

Moles of hydrated sodium carbonate = n

$0.0366 M=\frac{n}{5.00 L}$

$n=0.0366 M\times 5 mol=0.183 mol$

Mass of hydrated sodium carbonate = n= 52.2 g

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$n=\frac{\text{mass of Compound}}{\text{molar mass of compound}}$

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Solving for x, we get:

x = 9.95 ≈ 10

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3 years ago

A weather balloon was initially at a pressure of 0.900 atm, and its volume was 35.0 L. The pressure decreased to 0.750 atm, with

marusya05 [52]

Boyle's Law

P₁V₁=P₂V₂

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V₂ = 42 L

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1 year ago

Which observation provided Albert Einstein the clue that he needed to explain the photoelectric effect? Light is made up of extr

Aliun [14]

The correct answer is

Energy of electrons depends on light’s frequency, not intensity.

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if we increase the number of photons the number of electrons will increase however if we increase the frequency the number of photons will not increase

While if we increase frequency the energy of electrons will increase as

Energy of photon = Work function of metal + kinetic energy of electrons

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2 years ago

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