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Alona [7]
3 years ago
8

I NEED HELP!!!!!!!!!!!!!!!!!!!!!!!

Chemistry
1 answer:
Karolina [17]3 years ago
6 0

Answer:

B.Self powered

Explanation:

They move by themselves.Hope this answer helps you ;)

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John and his wife are celebrating their first wedding anniversary. Their dinner consists of 55 grams of carbohydrates, 36 grams
nika2105 [10]

Answer: 733 kcal

Explanation:

According to a system used to calculate the available energy of foods, we have the following data:

  • protein has 4 kcal/g
  • carbohydrates has 4 kcal/g
  • fat has 9 kcal/g
  • alcohol has 7 kcal/g

So, we are told Jhon and his wife's dinner has:

  • 55 g of carbohydrates
  • 36 g of protein
  • 27 g of fat
  • 18 g of

Now we have to multiply these values by the kilocalories:

  • (55 g of carbohydrates)(4 kcal/g)=220 kcal  
  • (36 g of protein)(4 kcal/g)=144 kcal
  • (27 g of fat)(9 kcal/g)=243 kcal
  • (18 g of alcohol)(7 kcal/g)=126 kcal

Then we have to sum all, giving the following result:

<h2>733 kcal</h2>
4 0
4 years ago
Using the periodic table entry below, match the phrases with their corresponding values.
zhannawk [14.2K]

Atomic mass = 39

number of neutrons = 20

Number of protons= 19

Electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

The number of electron in first shell = 2

number of electrons in n=3 shell = 8


5 0
3 years ago
Read 2 more answers
How do glow sticks glow?
Mice21 [21]
A glow stick contains two chemicals and a suitable dye (sensitizer, or fluorophor). This creates an exothermic reaction. The chemicals inside the plastic tube are a mixture of the dye and diphenyl oxalate. The chemical in the glass vial is hydrogen peroxide.
7 0
3 years ago
What is chemical formula for: Iron (III) fluoride
True [87]

Answer:

FeF3

Explanation:

You have to break this problems down and know the naming rules.

- symbol for iron - Fe

- symbol for fluoride - F

- Add together - FeF

- Now, add the 3

- FeF3

- Hope that helps! Please let me know if you need further explanation.

6 0
3 years ago
Mary is driving on a straight road. When a deer jumps in front of her, she turns her car sharply to the left. What will happen t
Verizon [17]

Answer: The loose objects will tend to move to the right inside the car.

Explanation:

The options include:

A. The loose objects will tend to move to the left inside the car.

B. The loose objects will tend to move to the right inside the car.

C. The loose objects will tend to move toward the front of the car.

D. The loose objects will tend to move toward the back of the car.

Based on the question, we are informed that Mary is driving on a straight road and then a deer jumps in front of her, which made her turn her car sharply to the left.

The loose objects inside the car will move towards the opposite direction. Since Mary made a left turn, the loose objects in the car would move to the right.

3 0
3 years ago
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