Using the following phase diagram, which line segment describes the interface between solid and vapor?A-B

B-C

A-B-C

B-D

Answers

Answer 1

Answer: In the given phase diagram, the line segment that describes the interface between solid and vapor is A-B. The rest of the choices do not answer teh question above

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Which of the following is the SI unit used to measure mass?

Answers

The SI unit used to measure mass is said to be option A: kilogram (kg).

What is the SI unit used to measure mass?

The kilogram (kg) is the standard unit used to measure mass. The kilogram is the main unit used to measure how heavy something is in the International System of Units. It is based on the weight of a special cylinder made of platinum and iridium called the International Prototype of the Kilogram.

The liter (b.) is the SI unit for volume, the meter (c.) is the SI unit for length, and the Kelvin (d.) is the SI unit for temperature. The kilogram is commonly used as a standard unit for measuring weight in science, industry, and everyday situations.

Hence option A is correct.

Answers

Answer: $22.6 * 10^(23)$ molecules

Explanation:

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

For $CO_2$

Given mass= 165 g

Molar mass of $CO_2$ = 44 g/mol

Putting values in above equation, we get:

$\text{Moles of}CO_2 =(165g)/(44g/mol)=3.75mol$

According to avogadro's law, 1 mole of every substance weighs equal to the molecular mass and contains avogadro's number $6.023* 10^(23)$ of particles.

1 mole of $CO_2$ contains = $6.023* 10^(23)$ molecules of $CO_2$

Thus 3.75 moles $CO_2$ contains = $(6.023* 10^(23))/(1)* 3.75=22.6 * 10^(23)$ molecules of $CO_2$

Thus there will be $22.6 * 10^(23)$ molecules of $CO_2$

The molar mass of CO2 is 44 grams per mole.

165 grams / 44 grams per mole of CO2 = 3.75 moles CO2

Using Avogadro’s law where 1 mole of substance equals 6.023 x 10^23 molecules

3.75 moles CO2 (6.023 x 10^23 molecules /mole) = 2.26 x 10^24 molecules CO2

CO is a primary pollutant.
a. True
b. False?

Answers

Answer : Option A) true

Explanation :

CO which is carbon monoxide is a primary pollutant for air pollution. As it contributes to the major proportion in the air pollutants amongst others. It has 48% percent of pollutants in comparison to other pollutants of air. The source of carbon monoxide is mainly from incomplete combustion of fuel mostly from the older cars.

The rise in atmospheric CO results in fatigue, drowsiness and my also sometimes lead to death of the person exposed to it.

Final answer:

The statement is true. Carbon monoxide (CO) is a primary pollutant, which is directly emitted into the environment from vehicles and machines burning fossil fuels and can negatively impact our health by limiting the oxygen transportation in the body.

Explanation:

Yes, the statement 'CO is a primary pollutant' is True. Primary pollutants are those that are directly emitted into the environment and have a damaging effect. Carbon monoxide (CO) is a significant primary pollutant that is largely produced by vehicles and other machines that burn fossil fuels. It is harmful because, when inhaled, CO can limit your body's ability to transport oxygen in your bloodstream, leading potentially to serious health problems.

Learn more about Primary Pollutants here:

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Select all that apply.1: Which of the following particles are of approximately equal mass?

A: protons
B:electrons
C:neutrons
D:quarks
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2: If the atomic number of an element is 16, then it has 16 electrons.

True
False
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3: An unknown substance is tested and found to have the following physical properties:

brittle
fair conductor of electricity
dull (not shiny)

The substance is most likely a _____.

A:metal
B:metalloid
C:nonmetal
D:can not be determined without more data
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Answers

1)Protons and Neutrons have approximately equal masses

2)TRUE

3) B-Metalloid

Answer:

its a and b

Explanation:

i got it right on test

State charles's law. If a balloon occupies 885 cm3 volume at 20°C and 794 cm3 at - 10°C , prove that this is according to charles's law.

Answers

find the distance between

the following points:

a) AC0₂0) and B(5, 2)

During an investigation, a student determines that a copper sample has a density of 8.10g/mL. What is the student's percent error if the a ccepted density for copper is 8.96g/mL?