How did the gold foil experiment lead to the discovery of the nucleus?

Chemistry

1 answer:

makvit [3.9K]3 years ago

5 0

Answer:

Rutherford established the nuclear theory of the atom with his gold-foil experiment. When he shot a beam of alpha particles at a sheet of gold foil, a few of the particles were deflected. He concluded that a tiny, dense nucleus was causing the deflections.

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How much of a 15.0M stock solution do you need to prepare 250ml of a 2.35ml hf solution?

Svetradugi [14.3K]

Using the relationship M1V1 = M2V2 where M1 and M2 are the molar concentrations (mol/L or mmol/ml) and V1 and V2 are the volumes of the solutions, we can arrive at the following answer for the given problem:

<span>15.0M (L of stock solution) = 2.35M (0.25L) *all volumes were converted to liters.

L of stock solution = (2.35*0.25)/15.0

Therefore, 0.0392L or 39.17 ml of stock solution is needed. </span>

3 0

2 years ago

How many moles are in 25.58 grams of H20? SHOW WORK

kirill115 [55]

Answer:

1.42 moles

Explanation:

25.58 g of H₂O .

Molecular weight of water = 2 x 1 + 16 = 18

1 mole of water = 18 g of water

18 g of water = 1 mole

25.58 g of water = 25.58 / 18 mole

= 1.42 moles .

7 0

3 years ago

The temperature at which a substance freezes is called its melting point. True or False

Reika [66]

False it would be freezing point

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3 years ago

On which of the following factors does the amount of energy absorbed by an endothermic reaction depend?

Vlad1618 [11]

Answer:

The factors on which the amount of energy absorbed by an endothermic reaction depends are the " physical state of the reactant and the difference in the potential energy of the reactant and the product".

Explanation:

In an endothermic reaction the factors that affects the reaction are the physical state of the reactant, which thus becomes the enthalpy. And the difference in potential energy of the reactant because if the sum of the potential energy is less than the sum of the potential energy of the product than the endothermic reaction will be positive and the reaction hence will be endothermic.

$\delta H$ = $\delta H_{Product}$ - $\delta H_{Reactant}$