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Alex73 [517]
3 years ago
13

1. Which of the following statements is a consequence of the equation E=MC2

Chemistry
1 answer:
finlep [7]3 years ago
7 0

Answer:

D. All of the above​

Explanation:

E = MC² is a common equation in physics.

E is energy

M is mass

C is the speed of light

The law was stated by Albert Einstein.

  • From this law, it was shown that energy is released when matter is destroyed.
  • Mass and energy are equivalent as seen in nuclear reactions where mass is converted to energy.
  • Mass and energy is usually conserved in any process and this is a subtle modification of the law of conservation of matter and energy.
  • Most of these postulates apply to nuclear reactions which generally do not follow some precepts of chemical laws.
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Which of the following threats to biodiversity is a result of cutting down forests? (4 points)
Maslowich

Answer:

Explanation:

When I was growing up, one of the most popular cartoons was a little possum whose name was Pogo. He often said

“We have met the enemy and he is us.”

It is something Pogo said more than once. We are the problem with biodiversity being threatened.

We clear land for agriculture, not only in Canada and the United States, but in places like Brazil where it matters what is done to the environment. Those trees are the planet's lungs. Whole environmental groups are devoted to stopping the harvesting of trees that are hundreds of years old.

Our oceans have become cesspools of plastic.

Our rivers have become dumping grounds for all kinds of pollutants like paint and car tires to name just a couple.

Our landscape has been cluttered by billboards advertising things that are hundreds of miles away.

There's mining, oil, and other industries that make Mother Nature shudder every time they come near her.

7 0
3 years ago
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You add 0.5 moles of NaCl to water to make a 250 mL solution. What is the molarity
evablogger [386]

Answer:

The correct answer is 2, 0M

Explanation:

We calculate the molarity, which is a concentration measure that indicates the moles of solute (in this case NaCl) in 1000ml of solution (1 liter):

250 ml solution----- 0,5 moles of NaCl

1000 ml solution----x= (1000 ml solution x 0,5 moles of NaCl)/250 ml solution

x=  2,0 moles of NaCl --> <em>The solution is 2 M</em>

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How do you express a number in scientific notation?
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D. scientific notation is (insert decimal number) x10^(however many 0's there are)

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B. Compound

Calcium nitrate is an inorganic compound
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In an atom, electrons ____.
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In an atom, electrons travel outside the nucleus.

c. travel outside the nucleus.
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