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2 years ago

6

Rutherford’s experiment showed that some substances allowed alpha particles to pass through them Frequently.he theorized this ha

ppened because the nuclei were .

1 answer:

Svetllana [295]2 years ago

6 0

Made of smaller subatomic particles.

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State two things you notice about a metal when being touched

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Answer: one thing you may notice when you touch metal is a small electric shock, and depending on the temperature, it could be hot, or cold.

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2 years ago

A substance that speeds up a chemical reaction without being part of the chemical change, itself:

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It is known as a catalyst

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If 4.00 g of NaCl react with 10.00 g of AgNO3, what is the excess reactant?

Mekhanik [1.2K]

The reaction formula of this is NaCl + AgNO3 = NaNO3 + AgCl. The mole number of NaCl is 4/58.5=0.068 mol. The mole number of AgNO3 is 10/170=0.059 mol. So the NaCl is excess.

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2 years ago

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20 points and brainliest for best answer

RSB [31]

Gold/Atomic mass

196.96657 u ± 0.000004 u

Potassium/Atomic mass

39.0983 u ± 0.0001 u

Francium/Atomic number

87

Copper/Atomic mass

63.546 u ± 0.003 u

Bromine/Atomic mass

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2 years ago

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The decomposition of nitrogen dioxide is described by the following chemical equation:

kow [346]

Answer:

The balanced chemical equation will be " $NO_{2}+O\rightarrow NO+O_{2}$ ".

Explanation:

The given equation is:

$2NO_{2}\rightarrow 2NO+O_{2}$

<u>Step 1:</u>

<u></u> $2NO_{2}\rightarrow NO+O$ ...(equation 1)

<u>Step 2:</u>

<u></u> $NO_{2}+O\rightarrow NO+O_{2}$ ...(equation 2)

On adding "equation 1" and "equation 2", we get

⇒ $NO_{2}+NO_{2}+O\rightarrow NO+O+NO+O_{2}$

⇒ $2NO_{2}\rightarrow 2NO+O_{2}$

The second step:

⇒ $NO_{2}+O\rightarrow NO+O_{2}$

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2 years ago