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3 years ago

Houses with carpet are much quieter than houses with tile or hardwood floors because of sound wave

Chemistry

2 answers:

Vitek1552 [10]3 years ago

6 0

A) absporption :) hope it helps

Fed [463]3 years ago

5 0

I believe it would be absorption.

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4 and 5 pls and thank uuu

PtichkaEL [24]

Answer:

4. -ol

5. cyclic ketone

Explanation:

biology stuff

sorry it's hard to explain

5 0

2 years ago

Calcium carbonate decomposes when heated to solid calcium oxide and carbon dioxide gas. The balanced equation is: CaCO3(s) → CaO

wlad13 [49]

Answer:

The mass of CaCO3 reacted is 5.00 grams

Explanation:

Step 1 :Data given

Before the reaction, the container, including the CaCO3, had a mass of 24.20 g

After the reaction the container with product had a mass of only 22.00 g because the CO2 gas produced did not remain in the container.

Molar mass of CO2 = 44.01 g/mol

Molar mass CaCO3 = 100.09 g/mol

Step 2: The balanced equation

CaCO3 → CaO + CO2

Step 3: Calculate mass of CO2

Mass of CO2 = 24.20 grams - 22.00 grams

Mass of CO2 = 2.20 grams

Step 4: Calculate moles CO2

Moles CO2 = mass CO2 / molar mass CO2

Moles CO2 = 2.20 grams / 44.01 g/mol

Moles CO2 = 0.0500 moles

Step 5: Calculate moles CaCO3

For 1 mol CaCO3 we'll have 1 mol CaO and 1 mol CO2

For 0.0500 moles CO2 we need 0.0500 moles CaCO3

Step 6: Calculate mass CaCO3

Mass CaCO3 = moles CaCO3 * molar mass CaCO3

Mass CaCO3 = 0.0500 moles * 100.09 g/mol

Mass CaCO3 = 5.00 grams

The mass of CaCO3 reacted is 5.00 grams

8 0

3 years ago

What are the most common symptoms of acid poisoning

arlik [135]

Answer:

When swallowed, the signs and symptoms may include:

Severe burning and associated pain in the mouth, throat, and food-pipe

Drooling from the mouth

Loss of vision; unable to speak

Inflammation of the throat may cause respiratory difficulties

Sudden reduction in blood pressure (hypotension)

Vomiting blood

On skin contact, the signs and symptoms may include:

Severe skin and tissue burns associated with pain

Severe eye burns associated with pain; loss of vision

When inhaled, the signs and symptoms may include:

Coughing (including coughing-up blood), choking

Heaviness in the chest; chest pain

Bluish discoloration of lips and beneath fingernails

Respiratory difficulties

Reduced blood pressure (hypotension)

Headache and weakness

Increased heart-rate

Collapse

Explanation:

6 0

3 years ago

Read 2 more answers

Which of the following solutes has the greatest effect on the colligative properties for a given mass of pure water? Explain.

Strike441 [17]

Answer:

Option a.

0.01 mol of CaCl₂ will have the greatest effect on the colligative properties, because it has the biggest i

Explanation:

To determine which of the solute is going to have a greatest effect on colligative properties we have to consider the Van't Hoff factor (i)

These are the colligative properties:

ΔP = P° . Xm . i → Lowering vapor pressure

ΔT = Kb . m . i → Boiling point elevation

ΔT = Kf . m . i → Freezing point depression

π = M . R . T → Osmotic pressure

Van't Hoff factor are the numbers of ions dissolved in the solution. For nonelectrolytes, the i values 1.

CaCl₂ and KNO₃ are two ionic solutes. They dissociate as this:

CaCl₂ → Ca²⁺ + 2Cl⁻

We have 1 mol of Ca²⁺ and 2 chlorides, so 3 moles of ions → i = 3

KNO₃ → K⁺ + NO₃⁻

We have 1 mol of K⁺ and 1 mol of nitrate, so 2 moles of ions → i = 2

Option a, is the best.

8 0

3 years ago

The temperature of a 500. ml sample of gas increases from 150. k to 350. k. what is the final volume of the sample of gas, if th

Andreas93 [3]

<span>Answer: 1170 ml is the final volume of the sample of gas, if the pressure and moles in the container is kept constant.</span>

7 0

4 years ago

Read 2 more answers