PHYSICS HIGH SCHOOL

What is the molar mass, in grams, of a mole of an element equal to?A. The number of electrons
B. The atomic weight of the element
C. The atomic number of the element
D. The number of neutrons in the element

Answers

Answer 1
Answer:

Answer : Molar mass is equal to the atomic weight of the element.

Explanation :

The ratio of the mass of a given substance to the amount of substance is called as the molar mass of that substance. It is denoted by M. Its SI unit is kg/mol but it is usually expressed in g/mol.

In simpler form it is equal to the atomic weight of the substance.

For example, the molar mass of water can be calculated as :

M=2* 1+2(8)=18\ g/mol

Hence, the correct option is (B) "The atomic weight of the element".

Answer 2
Answer: The correct answer is B. The atomic weight of the element 

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Answers

i believe the answer is B!

What is the capital of prince edward island

Answers

Answer:

The capital of Prince Edward Island is Charlottetown.

Explanation:

hope this helps, and if it did, please mark brainliest :)

250j of chemical energy are stored in the battery. calculate how many joules of kinetic energy will the electric car

Answers

Answer:

To calculate how many joules of kinetic energy an electric car can have using the 250 joules of stored chemical energy from the battery, you'll need to consider the efficiency of the energy conversion from chemical to kinetic energy. Electric cars are not 100% efficient in converting stored energy to kinetic energy due to losses in the system, including in the motor, transmission, and drivetrain.

Let's say the efficiency of the conversion is "η," where η is a value between 0 and 1 (e.g., 0.85 for 85% efficiency). The kinetic energy (KE) the car can have will be:

KE = η * 250 joules

You can calculate the kinetic energy for different efficiency values by substituting η into the formula.

For example, if the efficiency is 85%:

KE = 0.85 * 250 joules = 212.5 joules

So, with an 85% efficiency, the electric car can have approximately 212.5 joules of kinetic energy from the 250 joules of stored chemical energy in the battery. The actual efficiency may vary depending on the specific car and its components.

A box weighing 18 N requires a force of 6.0 N to drag it at a constant rate. What is the coefficient of sliding friction?

Answers

Use f = uN to find the coefficient of friction. We know friction (6.0 N) and the normal forces (18 N), so plug them in to the equation which gives us 6 = u18. Solving for u: u = 0.33

The Correct Answer Is 0.33.

A bus is traveling at 79.7 kilometers per hour east. How far does the bus travel in 1.45 hours?

Answers

Answer:

115.565 km

Explanation:

We know

A bus is traveling at 79.7 kilometers per hour east.

How far does the bus travel in 1.45 hours?

We will solve it by using the Distance formula.

Distance = Speed × Time

We take

79.7 x 1.45 = 115.565 km

So, the bus travels 115.565 km in 1.45 hours.

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Answers

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