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3 years ago

What is the atomic number of 232Th

Chemistry

1 answer:

SIZIF [17.4K]3 years ago

7 0

Answer:Su numero atomico es 90

Explanation:

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Whose atomic model could be described as a positive, solid sphere in which electrons are disbursed? A) Rutherford B) Dalton C) T

goldfiish [28.3K]

Thomson suggested the model of atom which was a sphere of positive matter within which electronic forces determined the positioning of the corpuscles. The corpuscles were distributed in a uniform sea of positive charge. This was so-called "plum pudding" model.
Answer: C ) Thomson

5 0

3 years ago

Read 2 more answers

What phase is not part of mitosis and is where the cells spends most of its time

andriy [413]

Answer:

interphase

Explanation:

they spend most time in interphase

5 0

3 years ago

3H2 + N2 —> 2NH3 .

In-s [12.5K]

Answer:

$\boxed{1.26 \times 10^{20} \text{ molecules NH}_{3}}$

Explanation:

We will need a balanced chemical equation with masses, moles, and molar masses.

1. Gather all the information in one place:

M_r: 2.016 17.03

3H₂ + N₂ ⟶ 2NH₃

m/g: 6.33 × 10⁻⁴

2. Calculate the moles of H₂

$\text{Moles of H}_{2} = 6.33 \times 10^{-4}\text{ g H}_{2} \times \dfrac{\text{1 mol H}_{2}}{\text{2.016 g H}_{2}} = 3.140 \times 10^{-4} \text{ mol H}_{2}$

3. Calculate the moles of NH₃

The molar ratio is 2 mol NH₃/3 mol H₂.

$\text{Moles of NH}_{3} = 3.140 \times 10^{-4} \text{ mol H}_{2} \times \dfrac{\text{2 mol NH}_{3}}{\text{3 mol H}_{2}} = 2.093 \times 10^{-4}\text{ mol NH}_{3}$

4. Calculate the molecules of NH₃

There are 6.022 × 10²³ molecules of NH₃/1 mol NH₃.

$\text{Molecules of NH}_{3} = 2.093 \times 10^{-4}\text{ mol NH}_{3} \times \dfrac{6.022 \times 10^{23}\text{ molecules NH}_{3}}{\text{1 mol NH}_{3}}\\= 1.26 \times 10^{20}\text{ molecules NH}_{3}\\\text{The reaction produces } \boxed{\mathbf{1.26 \times 10^{20}} \textbf{ molecules NH}_{3}}$

3 0

3 years ago

No question mmmmmmmmmmmmmmmmmmmmmmmmm

tatiyna

So this isn’t a question ?

5 0

4 years ago

Water moves up a plant because of hydrogen bonds by a process called __________.

madreJ [45]

Answer:

transpiration

Explanation:

Transpiration is when water moves up a plant stem, because water has surface tension due to cohesion.

In water, the H is slightly positive and the O2 are both slightly negative. This creates bonds between the H and O of another molecule. This causes water to be sticky, and when water moves up a plant, other molecules are also pulled up.

Hope this helps!

8 0

2 years ago