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3 years ago

State evidence from the table indicating that the proportion of the components in a

Chemistry

1 answer:

Dafna11 [192]3 years ago

8 0

Based on the table,

The evidence from the table that indicate that the proportion of the components in a mixture can vary is that both mixtures have the same mass but different amounts of sands and NH4Cl

Hope this helps

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The table shows the pH levels of four common items. If a student tests a sample of each item, which will turn a strip of red lit

podryga [215]

The answer is d, hand soap.

Hand soap is alkaline and red litmus paper turns blue when exposed to alkaline solution.

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3 years ago

A 1.68 g sample of water is injected into a closed evacuated 5.3 liter flask at 65°C. What percent (by mass) of the water will b

Angelina_Jolie [31]

Answer:

50.4 % of the water will be vapor

Explanation:

Step 1: Data given

Mass of water = 1.68 grams

volume of the flask = 5.3 L

Temperature = 65°C

Vapor pressure of water at 65°C = 187.5 mmHg = 0.2467 atm

Step 2: Calculate moles of H2O

p*V=n*R*T

⇒ p = the pressure of water = 0.2467 atm

⇒ V = the volume of the flask = 5.3 L

⇒ n = moles of water

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

⇒ T = the temperature = 65°C = 338 Kelvin

n = (p*V)/(R*T)

n = (0.2467 * 5.3) /(0.08206* 338)

n = 0.047 moles

Step 3: Calculate mass of water

Mass of water = moles of water * molar mass of water

Mass of water = 0.047 moles *18.02 g/mol

Mass of water = 0.84694 grams

Step 4: Calculate the percent of water vaporized

% = (0.84694 grams/1.68 grams) *100%

% = 50.4%

50.4 % of the water will be vapor

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3 years ago

In the boxes below, draw three particle diagrams representing the sample

Alexxandr [17]

Answer: 2

Explanation: bencause they are changing

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3 years ago

How can you minimize a collision summary

ElenaW [278]

One of the ways to minimize a collision is to slow down: When you can't find an escape and you're definitely going to collide with something, you should slow your vehicle down as much as possible.

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3 years ago

HELP ME

krok68 [10]

Answer:

D group

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3 years ago