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Anna35 [415]
3 years ago
12

Explain why it is necessary for a chemical reaction to balance.

Chemistry
2 answers:
atroni [7]3 years ago
8 0
So that it follows the law of conservation of mass
tiny-mole [99]3 years ago
7 0
Chemical equation need to be balanced in order to satisfy the law of conservation of matter, which states that in a closed system matter is neither created nor destroyed
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How to convert 250 in scientific notation
cricket20 [7]
In scientific notation, a number is less than ten but more than one.

Move the decimal point from 0, 250.000 <- this is the same as 250 to between 2 and 5.

I had to move two spaces.

2.5^2

I hope this helps!
~kaikers
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3 years ago
Which of these compounds is a product of protein synthesis?
yuradex [85]
The answer is c it is Carbon Dioxide
3 0
3 years ago
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A covalent bond formed when 2 atoms share 6 valence electrons between them is a ______ bond
sleet_krkn [62]
COVALENT BOND IS THE BOND EXISTING BETWEEN 2 ATOMS THAT SHARE 6 ELECTRONS
5 0
3 years ago
suppose medical records indicate that the length of newborn babies (in inches) is normally distributed with a mean of 20 and a s
Tanya [424]

Answer:

  • <u>0.6826 (68.26%)</u>

Explanation:

<u>1) Find the z-scores:</u>

  • z = [X - μ ] / σ

a) z-score for 22.6 inches length

  • X = 22.6
  • μ = 20
  • σ = 2.6

  • z = [ 22.6 - 20 ] / 2.6 = 1.00

b) z-score for 17.4 inches length

  • X = 17.4
  • μ = 20
  • σ = 2.6

  • z = [ 17.4 - 20 ] / 2.6 =  - 1.00

<u>2) Probability</u>

Then, you have to find the probability that the length of an infant is between - 1.00 and 1.00 standards deviations (σ) from the mean (μ).

That is a well known value of 68%, which is part of the 68-95-99.7 empirical rule.

The most exact result is obtained from tables and is 68.26%:

  • 1 - P (z ≥ 1.00) - P (z ≤ - 1.00) = 1 - 0.1587 - 0.1587 = 0.6826 = 68.26%
5 0
3 years ago
If you test the boiling point of ethanol and have a 2.3% error, what was the boiling point of ethanol in the test?
anyanavicka [17]

Answer:

the answer is A

Explanation:

3 0
3 years ago
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