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Galina-37 [17]
3 years ago
9

What is the solution to the problem expressed to the correct number of significant figures

Chemistry
1 answer:
quester [9]3 years ago
4 0

I don't know what the problem is, but here are some rues to help you out:

  1. All non-zero figures are significant
  2. When a zero falls between non-zero digits, that zero is significant.
  3. When a zero falls after a decimal point, that zero is significant.
  4. When multiplying and dividing significant figures, the answer is limited to the number of sig figs equal to the least number of sig figs in the problem.
  5. When adding and subtracting, the answer is limited to the number of decimal places in the number with the least number of decimal places.
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A sodium atom has 11 protons, 10 electrons, and 12 neutrons. What is its charge
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Answer:

An ion with 11 protons, 11 neutrons, and 10 electrons would have a charge of 1+, also expressed as a charge of positive one or +1.

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2 years ago
What information is shown in an atom’s electron dot diagram? the number of shells an atom has the number of electrons in each sh
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The number of valence electrons an atom has  
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12. List examples of physical and chemical properties.
gladu [14]

Answer:Phase Transformation Temperatures

Density

Specific Gravity

Thermal Conductivity

Linear Coefficient of Thermal Expansion

Electrical Conductivity and Resistivity

Magnetic Permeability

Corrosion Resistance

Explanation:

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3 years ago
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In water, naoh almost completely separates into na+ and oh- ions. thus, naoh is _____.​
stepan [7]
<span>In water, naoh almost completely separates into na+ and oh- ions. thus, naoh is Stong base.
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3 0
3 years ago
A scientist is studying a radioactive element that has a half-life of 63 years. Choose the correct answers from the drop-down me
attashe74 [19]
<h3>Answer:</h3>

63 years

Eighth

The number of half lives

<h3>Explanation:</h3>

It will take 63 years for half of the sample to decay

In 189 years, eighth of the sample will be left

Scientists can figure out how old a sample is by multiplying the number of half lives by the length of the half life.

Half life is the time taken by a radioactive sample to decay to half of the original amount.

Therefore, for a radioactive element with a half-life of 63 years, it will take 63 years for the sample to decay to half of the original amount.

After 189 years, only an eighth of the sample will be left.

That is, 189 years is equivalent to 3 half-lives

Therefore, if the original amount is 1, then;

1 → 0.5 → 0.25 → 0.125

Thus, scientists can figure out how old a sample is by multiplying the number of half lives by the length of the half life.

4 0
2 years ago
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