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3 years ago

Help ASAP! WILL MARK BRAINLIEST! What must happen for light to change a material?

Chemistry

2 answers:

kirill [66]3 years ago

8 0

Answer: change in speed

Explanation: the change in speed causes light Ray's to change direction. This directional change is called refraction.

never [62]3 years ago

7 0

Answer:

There should be the refraction for light to change a material.

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Calculate (a) the number of moles of hydrogen required to react with 0.0969 moles of nitrogen, and (b) the number of moles of am

Bumek [7]

Answer:

The answer to your question is:

Explanation:

Data

moles H=?

moles of N = 0.0969

moles of NH₃=?

N₂ (g) + 3 H₂ (g) ⇒ 2NH₃ (g)

Process

1.- Set a rule of three to calculate the moles of hydrogen

1 mol of nitrogen ------------- 3 moles of hydrogen

0.0969 moles of N ---------- x

x = (0.0969 x 3) / 1

x = 0.2907 moles of hydrogen

2.- Set a rule of three to calculate the moles of ammonia

1 mol of nitrogen -------------- 2 moles of ammonia

0.0969 mol of N -------------- x

x = (0.0969 x 2) / 1

x = 0.1938 moles of ammonia

5 0

4 years ago

5.00 g of an unknown compound was dissolved in 250.0 mL of water. The unknown compound was found to be a non-electrolyte and the

Zielflug [23.3K]

Answer:

This unknown compound has a molar mass of 33.74g/mole

Explanation:

Step 1: Given data

The formula for the osmotic pressure is:

π = MRT = 14.5 atm

⇒ with M = Concentration of the solution

⇒ with R = gas constant = 0.08206 L atm / mol K

⇒ with T = absolute temperature (in Kelvin) = 298K

Step 2: Calculate concentration

M = π/ RT

M = 14.5 / (0.08206 * 298)

M = 0.593 M this is 0.593 moles per L

Step 3: Calculate number of moles

Since the volume is only 0.250 L, the amount of moles is:

0.593 * 0.250 L = 0.1482 moles

Step 4: Calculate molar mass

The molar mass is : mass / moles

Molar mass of this unknown compund = 5g / 0.1482 moles = 33.74 g/mole

This unknown compound has a molar mass of 33.74g/ mole

4 0

3 years ago

The functional unit of a nephron

zvonat [6]

Explanation:

nephron is a functional unit of kidney

8 0

3 years ago

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If the neutralized mixture was boiled dry, what would be left?

alisha [4.7K]

A salt would be left over. For example, if you reacted NaOH with HCl, your products would be NaCl, a salt, and water.

7 0

3 years ago

What is the overall cell potential for this redox reaction?

alexgriva [62]

$Eºcell = Eºcathode - Eºanode = -2.87 -(-2.90) = 0.03 V$

7 0

4 years ago

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