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3 years ago

What must be true for a car to move forward at a constant speed? The forward fore of the car is....?

Chemistry

1 answer:

4vir4ik [10]3 years ago

4 0

Constant. you have to continuously apply the same amount of force to achieve constant velocity

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Please help me find the potential energy and explain

Kaylis [27]

Answer:

PE ( Potential Energy ) = Mass x Gravity x Height

Explanation:

For the first one you would do.

.28 ( mass) x 9.8 ( constant of gravity ) x .40m ( height )

So just multiply your Mass, Gravity and Height together and you will get Potential Energy

Gravity is always 9.8 m/s

8 0

3 years ago

Read 2 more answers

Why does food have potential energy?

Savatey [412]

Answer:

So that if we feel weak, energy is released through it so we can do work and do stuff like walk or think. It's like stored energy that can do things for the future.

Please give brainliest if it helped.

3 0

3 years ago

Read 2 more answers

How reactive is an atom of Sodium(Na) and why?

s344n2d4d5 [400]

3rd one:
it is very reactive because it does not have a full Valence shell.

this is because it's in group 1 so it has one electron in its outer shell, and it wants to have a full outer shell ( which it can gain by losing the electron in a reaction).

Hope this helps :)

5 0

3 years ago

One alternative to burning fossil fuels in order to produce electricity.

Tju [1.3M]

Windmills producing energy

4 0

3 years ago

Calculate the percent yield if 52.9 g of ethanol reacts to produce 26.7 g of ether.

blagie [28]

Answer:

The % yield is 62.7 %

Explanation:

Step 1: the balanced equation

2CH3CH2OH(l) → CH3CH2OCH2CH3(l) + H2O(l)

Step 2: Data given

mass of ethanol = 52.9 grams

molar mass of ethanol = 46.07 g/mol

mass of ether = 26.7 grams

Molar mass of ether = 74.12 g/mol

Step 3: Calculate moles of ethanol

Number of moles = Mass / molar mass

Moles of ethanol = 52.9 grams / 46.07 g/mol

Moles of ethanol = 1.15 moles

Step 4: Calculate moles of ether

For 2 moles of ethanol consumed, we have 1 mole of ether produced

For 1.15 moles of ethanol consumed, we have 1.15/2 = 0.575 moles of ether produced

Step 5: Calculate mass of ether

Mass = moles * Molar mass

Mass ether = 0.575 moles * 74.12 g/mol = 42.62 grams = theoretical yield

Step 6: Calculate % yield

% yield = (26.7 / 42.62) * 100 = 62.7%

The % yield is 62.7 %

6 0

4 years ago