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3 years ago

PLEASE I WILL PUT YOU AS BRAINLIEST, 20 POINTS

Chemistry

2 answers:

fiasKO [112]3 years ago

8 0

Answer:

a light ray will always A light ray will always reflect away from a surface at an angle equal to the angle at which it struck the surface

Explanation:

it sound more formal and just plainly better

anyanavicka [17]3 years ago

6 0

Answer:

A it's very simple

Explanation:

i need the points

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In a solution, the solvent is...

Marina CMI [18]

Answer:

The solvent is the substance that dissolves solutes.

Explanation:

Solutes are the ones being dissolved. Examples could be sugar, salt, etc.

Solvents are the dissolver. Examples could be acids like HCl or water.

7 0

3 years ago

Read 2 more answers

igneous rock that cools very quickly when it forms may have a texture that is______and______with no visible____

Fudgin [204]

Igneous rock that cools very quickly when it forms may have a texture that is smooth and shiny with no visible grain.

6 0

3 years ago

Calculate the molarity of 65.3 grams of sugar(342.3 g/mol), c12h22011 in 750 ml of solution.

k0ka [10]

Answer:

0.254 M

Explanation:

If the formula mass of sugar is 342.3 g/mol, and there are 65.3 g, then there are 65.3/342.3=0.190768 mol.

Also, 750 mL = 0.750 L.

molarity = (moles of solute)/(liters of solution)

molarity = 0.190768/0.750 = 0.254 M

8 0

1 year ago

How many atoms are contained in 5.77 grams of aluminum? Express your answer in exponential notation (Ex: 6.02*1023 would be ente

bagirrra123 [75]

Answer:

5.09

Explanation:

6 0

3 years ago

The following thermochemical equation is for the reaction of nitrogen(g) with oxygen(g) to form nitrogen dioxide(g). N2(g) + 2O2

Rzqust [24]

Answer: The mass of nitrogen gas reacted to produce given amount of energy is 5.99 grams.

Explanation:

The given chemical reaction follows:

$N_2(g)+2O_2(g)\rightarrow 2NO_2(g);\Delta H=66.4kJ$

We know that:

Molar mass of nitrogen gas = 28 g/mol

We are given:

Enthalpy change of the reaction = 14.2 kJ

To calculate the mass of nitrogen gas reacted, we use unitary method:

When enthalpy change of the reaction is 66.4 kJ, the mass of nitrogen gas reacted is 28 grams.

So, when enthalpy change of the reaction is 14.2 kJ, the mass of nitrogen gas reacted will be = $\frac{28}{66.4}\times 14.2=5.99g$

Hence, the mass of nitrogen gas reacted to produce given amount of energy is 5.99 grams.

8 0

3 years ago