Chemistry High School

please answer fast! Which of the following statements are false?
A: In a chemical change, atoms are rearranged to make new compounds.
B: The same element is present before and after a chemical change.
C: A physical change does not produce an entirely new substance.
D: A chemical property can be observed without changing the identity of the substance.

Answers

Answer 1

I believe it is C.

Hope this helps!

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The moon stays in orbit around the Earth because of the Earth's

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Answer:

Gravity

Explanation:

I NEED HELP WIT QUESTION THREE

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Answer: 2.00

Explanation:

2 rounded to the nearest hundredth is 2.00

your welcome :)

answers for all three:

1. 4.00

2. 16.04

3. 2.00

How many atoms are in 100g H2O ?

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Answer:11

explain

: cause i think it is

!! brainliest answer !! please help it's due tonight :)

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Answer:

3. D

28. also known as Freon 12

Explanation:

Which group in the food chain uses the energy of the sun to create its own food A consumers B predators C producers D prey

Answers

Answer:

C producers

Explanation:

All food chains start with energy from the sun. This energy is captured by plants. Thus the living part of a food chain always starts with plant life and ends with an animal. Plants are called producers because they are able to use light energy from the sun to produce food (sugar) from carbon dioxide and water.

advantages of solar energy

Answers

renewable energy source
reduces electric bills
low maintenance costs
reduced needs for fossil fuels and foreign oils

Another one is Electricity use

Name ways we use technology in inner and outer space
8th grade science btw

Answers

Answer:

Explanation:

Many common everyday services such as weather forecasting, remote sensing, satellite navigation systems, satellite television, and some long-distance communications systems critically rely on space infrastructure. ... Of the sciences, astronomy and Earth science benefit from space technology am in 6th grade btw

hi please help, i will give 100 points

Answers

Explanation:

Boiling water:water heats up and bubbles physical change

Baking a cake: starts to cook into bread chemical change

Burning wood: turns into ash and burned wood chemical change

Painting a door: door changes color physical change

Answer:

water is yummy

Explanation:

help please asap. chem sucks

Answers

I'm assuming that C is carbon.

[tex]4.590 \: mol \: c \times \frac{12.01 \:g \: c}{1 \: mol \: c} [/tex]

55.1259 g of C

3) What are the three types of sedimentary rocks?

Answers

Answer:

clastic, organic, and chemical

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