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1 year ago

The results of the gold foil experiment led to the

Chemistry

1 answer:

kari74 [83]1 year ago

4 0

Answer:

B) mostly empty space and has a small, positively charged nucleus

Explanation:

In the gold foil experiment, positively-charged alpha particles were directed towards a gold foil sheet. During the experiment, most of the particles went through the gold foil. However, a select few alpha particles were met with resistance and bounced off the sheet.

This proves that the gold atoms, which made up the gold foil sheet, were mostly empty space as most of the alpha particles passed through it. Furthermore, the particles which bounced off the sheet must have hit small, positively-charged nuclei. The nuclei must have been positive because similar charges repel each other. In other words, if the nuclei were negatively-charged, the positively-charged alpha particles would not bounce off the sheet, but instead "stick" to it.

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How does the volume of the balloon change after moving it to the hot room?How does the volume of the balloon change after moving

Ghella [55]

Answer: The balloons volume would increase.

Explanation: This is because when the balloon enters a warmer climate it expands due to more freedom within the molecules movement.

7 0

3 years ago

The p K a of hypochlorous acid is 7.530 . A 60.0 mL solution of 0.103 M sodium hypochlorite ( NaOCl ) is titrated with 0.296 M H

IrinaVladis [17]

Answer:

pH of the solution after addition of 8 ml 0,296 molar HCl = 7.94

Explanation:

In this case buffer exist between hypochlorous acid HClO is a weak acid and its conjugate base hypochlorite ion ClO⁻ which are deliver to the solution by NaOCl ( sodium hypochlorite ).

The salt is completely dissociate

[NaOCl] = [ClO⁻]

Using Henderson equation to find pH of this buffer

pH = pKa + log $\frac{[Conjugate base]}{[Acid]}$

or, = 7.53 + log $\frac{60 X 0.103}{8 X 0.296}$

or, = 7.53 + 0.4

or, = 7.94

6 0

3 years ago

A: -3.45 B: 17.45 C: 10.55 D: 3.55

Minchanka [31]

Answer:

i think its b

Explanation:

6 0

4 years ago

Explain the verse below in your own words in a little summary. Hebrews 11:7

NeX [460]

God had warned Noah of the flood and directed him to build an ark. Noah had faith in God and began building.

4 0

3 years ago

Read 2 more answers

Butane combusts in the atmosphere and releases heat:2C4H10(g) + 13 O2(g) ---> 8 CO2(g) + 10 H2O(g)The signs of the values for

anastassius [24]

Answer: $\Delta G$ : -ve

$\Delta H$ : -ve,

$\Delta S$ : +ve

Explanation:

Endothermic reactions are those in which heat is absorbed by the system and exothermic reactions are those in which heat is released by the system.

$\Delta H$ for Endothermic reaction is positive and $\Delta H$ for Exothermic reaction is negative.

Entropy is the measure of randomness or disorder of a system. If a system moves from an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa.

$\Delta S$ is positive when randomness increases and $\Delta S$ is negative when randomness decreases.

$2C_4H_{10}(g)+13O_2(g)\rightarrow 8CO_2(g)+10H_2O(g)$

As 15 moles of gaseous reactants are changing into 18 moles of gaseous products, randomness is increasing and thus $\Delta S$ is positive.

Using Gibbs Helmholtz equation:

$\Delta G=\Delta H-T\Delta S$

$\Delta G=(-ve)-T(+ve)$

$\Delta G=(-ve)(-ve)=-ve$

Thus $\Delta H$ is negative , $\Delta S$ is positive and $\Delta G$ is negative.

5 0

3 years ago