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3 years ago

Hi can someone please help me answer this the question is in pictures

Chemistry

1 answer:

blsea [12.9K]3 years ago

5 0

1. Warm front
2. East
3. Warm stormy weather

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During a phase change, the temperature remains ________. After the change of state occurs, the temperature ________.

lozanna [386]

Answer:

The temperature remains constant. after the change occurs and temp remains the same

Explanation:

Remains constant because the phase change is absorbing the energy, after the phase change occurs it is then increasing in temperature again.

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3 years ago

Which statement about melting and boiling points is true? Question 3 options:

bonufazy [111]

Answer:

Explanation:

I believe it is B but I am not entirely sure! don't do this is B doesn't sound or look right to you!

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3 years ago

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Olegator [25]

The awnser to your question would be B

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3 years ago

What mass of silver oxide, Ag2O is required to produce 25.0 g of silver sulfadiazine, AgC10H9N4SO2, from the reaction of silver

Wittaler [7]

Answer:

8.1107 g

Explanation:

The given reaction:

$2C_{10}H_{10}N_4SO_2+Ag_2O\rightarrow 2AgC_{10}H_9N_4SO_2+H_2O$

Given that:

Mass of silver sulfadiazine = 25.0 g

Molar mass of silver sulfadiazine = 357.14 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Moles= \frac{25.0\ g}{357.14\ g/mol}$

$Moles= 0.07\ mol$

From the reaction,

2 moles of silver sulfadiazine are formed from 1 mole of silver oxide

So,

1 mole of silver sulfadiazine are formed from 1/2 mole of silver oxide

0.07 mole of silver sulfadiazine are formed from 1/2*0.07 mole of silver oxide

Moles of silver oxide = 0.035 moles

Molar mass of silver oxide = 231.735 g/mol

Mass = Moles * Molar mass = 0.035 moles * 231.735 g/mol = 8.1107 g

4 0

4 years ago

How to prepared sodium chloride solution.

nexus9112 [7]

Explanation:

Dissolve 93.52g of NaCl in about 400mL of distilled water, then add more water until final volume is 800mL. If starting with a solution or liquid reagent: When diluting more concentrated solutions, decide what volume(V2) and molarity (M2) the final soluble should be.

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3 years ago