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nlexa [21]
3 years ago
8

In your own words, give a summary of the history of the atom. Make sure to use names of models and the scientists associated wit

h each. Make a different paragraph for each model/scientist. (ADV is a minimum of 5 paragraphs) Notice that the Atomic Theory has changed over time as scientists have added knowledge through experimentation and use of advanced instruments. Be sure to include the following: Plum pudding model orbitals electrons gold foil experiment Bohr's model protons nuetrons nucleus
Chemistry
2 answers:
Stella [2.4K]3 years ago
4 0
2 or more I don’t really know what the answer is
KatRina [158]3 years ago
3 0

Answer:

The answer is number 2

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Can someone please help
miskamm [114]

Answer:

b

Explanation:

6 0
3 years ago
Read 2 more answers
Suppose 6.63g of zinc bromide is dissolved in 100.mL of a 0.60 M aqueous solution of potassium carbonate. Calculate the final mo
Alenkasestr [34]

Answer:

[Zn²⁺] = 4.78x10⁻¹⁰M

Explanation:

Based on the reaction:

ZnBr₂(aq) + K₂CO₃(aq) → ZnCO₃(s) + 2KBr(aq)

The zinc added produce the insoluble ZnCO₃ with Ksp = 1.46x10⁻¹⁰:

1.46x10⁻¹⁰ = [Zn²⁺] [CO₃²⁻]

We can find the moles of ZnBr₂ added = Moles of Zn²⁺ and moles of K₂CO₃ = Moles of CO₃²⁻ to find the moles of CO₃²⁻ that remains in solution, thus:

<em>Moles ZnB₂ (Molar mass: 225.2g/mol) = Moles Zn²⁺:</em>

6.63g ZnBr₂ * (1mol / 225.2g) = 0.02944moles Zn²⁺

<em>Moles K₂CO₃ = Moles CO₃²⁻:</em>

0.100L * (0.60mol/L) = 0.060 moles CO₃²⁻

Moles CO₃²⁻ in excess: 0.0600moles CO₃²⁻ - 0.02944moles =

0.03056moles CO₃²⁻ / 0.100L = 0.3056M = [CO₃²⁻]

Replacing in Ksp expression:

1.46x10⁻¹⁰ = [Zn²⁺] [0.3056M]

<h3>[Zn²⁺] = 4.78x10⁻¹⁰M</h3>

4 0
3 years ago
Kyle travelled a total of 762 miles during his vacations to the United States. How many kilometers did he travel?
Mashutka [201]
762 miles = 1226.32 kilometers
you multiply the miles by 1.609 to get the kilometers
4 0
2 years ago
Which statement is true about oxygen and rocks?
mafiozo [28]
<span>oxygen is a mixture and a rock is a pure substance.</span>
7 0
3 years ago
Read 2 more answers
A 1.78−L sample of hydrogen chloride (HCl) gas at 2.09 atm and 22°C is completely dissolved in 699 mL of water to form hydrochlo
patriot [66]

Answer:

M=0.960M

Explanation:

Hello,

In this case, it is firstly necessary to compute the dissolved moles of hydrogen chloride into the water as shown below:

n_{HCl}=\frac{PV}{RT}=\frac{2.09atm*1.78L}{0.082\frac{atm*L}{mol*K}*295.15K}=0.671molHCl

Thus, the molarity is computed as shown below:

M=\frac{0.671mol}{0.699L}=0.960M

Wherein no change in volume is considered, therefore the volume of the solution was the same volume of water.

Best regards.

5 0
3 years ago
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