How does this number compare to what you predicted at the beginning of this lab genetics?

In 58.2 grams of Na there is 1.51 x 10^24 atoms.

To calculate the amount of atoms present in a mass sample, it is necessary to have knowledge of the molar mass of the element and Avogadro's constant, used in such a way that:

[tex]MM_Na= 23g/mol[/tex]

[tex]C = 6\times 10^{23}[/tex]

                                       [tex]MM = \frac{m}{mol}[/tex]

                                    [tex]23 = \frac{58.2}{x} = > 2.53 atoms[/tex]

Now, with the value of the number of moles, just calculate the number of atoms present, so that:

                                       [tex]atoms = mol \times C[/tex]

                                     [tex]atoms = 2.53 \times 6 \times 10^{23}[/tex]

                                        [tex]atoms = 1.51 \times 10^{24}[/tex]

So, in 58.2 grams of Na there is 1.51 x 10^24 atoms.

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Magnesium reacts quickly with HCl while iron reacts more slowly with HCl. Copper does not react at all with HCl.

We have to  recall that the reactivity of metals is determined by the position of the metal in the electrochemical series. This is an  arrangement of metals from more reactive to least reactive.

Magnesium and iron  reactwith dilute HCl to give hydrogen gas but the rates of reaction differ. Magnesium reacts fastest with HCl followed by iron but copper does not react with HCl at all.

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Answer:

E

Explanation:

We want to determine the amount of methanol (CH₃OH) needed to prepare 175 mL of a 1.00 M CH₃OH solution.

First, determine the amount of moles of CH₃OH needed. Recalled that molarity is simply moles per liter volume (mol / L):

[tex]\displaystyle\begin{aligned} & 175\text{ mL} \cdot 1.00\text{ M CH$_3$OH} \\ \\ = & 175\text{ mL} \cdot \frac{1.00\text{ mol CH$_3$OH}}{1\text{ L}} \cdot \frac{1 \text{ L}}{1000\text{ mL}} = 0.175\text{ mol CH$_3$OH} \end{aligned}[/tex]

Convert from moles of CH₃OH to grams:

[tex]\displaystyle 0.175\text{ mol CH$_3$OH} \cdot \frac{32.05\text{ g CH$_3$OH}}{1\text{ mol CH$_3$OH}} = 5.61\text{ g CH$_3$OH}[/tex]

In conclusion, the answer is E.

Answer:

Molar mass of

N

2

=

28 g/mol

Moles of

40.5 g N

2

gas

=

40.5 g

28 g/mol

=

1.45 mol

1 mol

of any gas at

STP

occupies

22.4 L

of volume.

1.45 mol

of

N

2

gas will occupy

1.45

mol

×

22.4 L

1

mol

=

32.48 L

Explanation:

Balancing the equation, we get that:

2Na + Cl2 -> 2NaCl

So from 1.5 moles of Na, 1.5(2/2)=1.5 moles of NaCl are produced.

Answer:

A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change.

Explanation:

HOPE THIS HELPS!!!

Answer:

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Based on the given concentration and volume of solutions, the molarity of the ions are as follows:

The molarity of a solution is the number of moles of the substance in a given volume of solution in litres.

Moles of [BrO3-] = 0.04M × 0.005 L = 0.0002 moles

Moles of [I-] = 0.01 M × 0.005 L = 0.00005 moles

Moles of [H+] = 0.1 M × 0.005 L = 0.0005 moles

Flask A:

total volume = 15 mL = 0.015 L

Molarity of [I-] = 0.00005/0.015

Molarity of [I-] = = 0.0033 M

Flask B:

Total volume = 10 mL = 0.01 L

Molarity of [BrO3-] = 0.0002/0.01

Molarity of [BrO3-] = 0.02 M

Molarity of [H+] = 0.0005/0.01

Molarity of [H+] = 0.05 M

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Answer:

Here ya go

Explanation:

Wavelengths are determined by the frequency of the waves. If it is a high frequency you will have a short wavelength. If it is a low frequency you will have a long wavelength.

Answer:

mesosphere

Explanation:

The coldest layer of the atmosphere is known as the mesosphere.

The layers of the atmosphere have the coldest temperatures is mesosphere. Therefore, option B is correct.

The third layer of the atmosphere, the mesosphere, is situated just above the stratosphere and under the thermosphere. As altitude rises, temperature drops in the mesosphere.

The third of the five layers that make up the Earth's atmosphere, the mesosphere, is located between the thermosphere and the stratosphere.

It is distinguished by a temperature that drops with altitude, becoming the coldest region of the entire atmosphere at a minimum of around 55 miles above the surface.

The coldest part of the Earth's atmosphere is the top of the mesosphere, where temperatures can locally drop as low as 100 K (-173°C).

Thus, option B is correct.

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Answer:

14) balanced

15) Unbalanced

I hope it helps.

2 SO₂(g) + O₂(g) => 2SO₃(g)

moles SO₃ = 2/1 x moles O₂ = 2/1 x 0.75 = 1.5 moles

molecules = 1.5 x 6.02 x 10²³ (avogadro's number) = 9.03 x 10²³ molecules

By balancing the reaction, it is clear that one  mole of oxygen gas produces 2 moles of sulphur trioxide (SO₃) and thus, 0.75 moles of O₂ will produce 1.5 moles of SO₃.

Sulphur trioxide is a covalent compound formed from the combination of sulphur dioxide with atmospheric oxygen. This reaction is an example of combination reaction.

The balanced chemical equation for the reaction of O₂ with sulphur  dioxide is written as follows:

[tex]\rm2SO_{2}(g) + O_{2} (g) \rightarrow 2 SO_{3}[/tex].

As per the balanced reaction, one mole of oxygen produces two moles of the product sulphur trioxide. Hence, the number moles of SO₃ formed from 0.75 moles of oxygen gas is calculated as follows:

no.of moles of SO₃ = (2 × 0.75) /1

                                 = 1.5 moles.

Therefore, the number of moles of SO₃ formed from 0.75 moles of O₂  is 1.5 moles.

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Answer:

true

Explanation:

I did the quiz and got it right

O₂ reacts increasing the NO₂ to 0.718 moles. At the return to equilibrium,

the amount SO₃ in the container approximately 0.931 moles.

The equilibrium constant for the reaction aA + bB ⇌ cC + dD is presented as follows;

[tex]K_c = \mathbf{\dfrac{[C]^c_{eq} +[D]^d_{eq} }{[A]^a_{eq} +[B]^b_{eq} }}[/tex]

The equilibrium constant for the reaction, whereby the volume is same for the contents is therefore;

[tex]K = \dfrac{0.654 \times 0.718}{0.369 \times 0.369} \approx 3.45[/tex]

Given that the NO reacts with the O₂ as follows;

2NO + O₂ [tex]\longrightarrow[/tex] 2NO₂

We have;

The number of moles of NO₂ added = 0.718 moles

The new number of moles are therefore;

Which gives;

0 = (0.654 + x) × x - 3.45 × (0.369 × (0.369 + 0.718)

2.45·x² - 5.6772·x + 1.384 = 0

[tex]x = \dfrac{5.6772 \pm \sqrt{(-5.6772)^2 - 4 \times 2.45 \times (1.3834)} }{2\times 2.45}[/tex]

x ≈ 0.2768 or x ≈ 2.04

The possible number of moles of SO₃ in the container after equilibrium is reestablished is therefore;

n ≈ 0.654 + 0.2768 ≈ 0.931

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Answer:LOL ITS PHYSICAL PROPERTIES

Explanation:IT IS TRUST ME

Explanation:

weathering is correct answer thanks

Answer:

Your answer would be:
C.) Nitrogen Cycle

Nitrogen moves continuously between the atmosphere and soil in what is called the nitrogen cycle.

Explanation:

The nitrogen cycle is the biogeochemical cycle describing how nitrogen moves through the biosphere and atmosphere. The nitrogen cycle is a lot like the carbon and water cycle. Rainstorms contribute atmospheric nitrogen through raindrops that reach the soil. Plants, such as soybeans, alfalfa, and clovers, are plants that can convert atmospheric nitrogen into plant-usable nitrogen.


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Answer:

i know the answer but i dont have time bro

Answer:

A.) Air pollutants wash onto land and water bodies from precipitation

C.) Storm water runoff carries pollution

I hope I helped! ^-^

Well, by definition,

molarity

=

moles of solute

volume of solution

Answer:

A polar molecule

Explanation:

Answer: 2

Explanation:

Answer:

By size, Jupiter reigns supreme in our solar system. This gas giant has 11 times the diameter of Earth. Astronomers have spotted even larger gas giants, such as the exoplanet Kepler-7b, located 1,400 light years away from Earth.

In our solar system, Jupiter and Saturn are gas giants. These planets make Earth look tiny. The diameter of Jupiter is 11 times bigger than that of Earth, and Saturn’s is nine times bigger. Some people also include Uranus and Neptune in the gas giant category. They have a lot of hydrogen and helium in their atmospheres. But these planets also have water, methane and ammonia, and so NASA places them in their own group.

Astronomers have spotted gas giants outside our solar system. Like Jupiter and Saturn, they aren’t very dense. But they can be even bigger or hotter than our solar system’s gas giants.

Explanation:

Hope it helps

2 grams of baking soda would contain 0.024 moles

The number of moles of a substance is the ratio of its mass and molar mass.

mole = mass/molar mass

Baking soda has a molar mass of 84.007 g/mol

Thus, 2.00 grams of baking soda will have:

                         2/84.007 = 0.024 moles

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let's see, oh I get it let me give you a hint. You need to do something with _Mgs+_ and _CaSO4>_ in order to get product 1 and product 2

Answer:

Tumor Suppressor genes,

and proto oncogenes.

Explanation:

can mutate and lead to a cancerous cell.