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Answer:

35.5 is the answer

Explanation:

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[tex]\Large \text{1)}[/tex]

[tex]\textbf{Use the formula and substitute the values}[/tex]

[tex]\displaystyle 0.3\ mol/L = \frac{n \ mol}{10 \times 10^{-3}\ L}[/tex]

[tex]\textbf{Solve for the number of moles}[/tex]

[tex]n = 0.003\ mol[/tex]

[tex]\textbf{Calculate final volume }[/tex]

[tex]40+10=50\ mL[/tex]

[tex]\textbf{Number of moles remains same. Solve for concentration}[/tex]

[tex]\displaystyle C=\frac{0.003\ mol}{50 \times 10^{-3}\ L} =0.06\ mol/L[/tex]

[tex]\Large \text{2)}[/tex]

[tex]\displaystyle DF=\frac{V_f}{V_i}[/tex]

[tex]\displaystyle DF=\frac{50}{10}=5[/tex]

Answer:

dioxide levels from 2002 to 2006.

Explanation:

According to Graham's law, CO, with the lowest molar mass, will have the fastest rate of effusion.

In physics and chemistry, effusion is the process in which a gas escapes from a container through a hole of diameter considerably smaller than the mean free path of the molecules.

According to Graham's law, the rate of effusion (r) is inversely proportional to the square root of the molar mass (M) of the gas.

r ∝ 1/√M

We have the following gases with the respective molar masses.

According to Graham's law, CO, with the lowest molar mass, will have the fastest rate of effusion.

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Answer:

by losing one or more electrons*

They are oxidised in the body into simple sugars like glucose.

They are also known as dietary fibres.

They are chemical substances that help in maintaining a healthy body.

Not proper functioning of thyroid gland.

Element Si, Ge, Sn, Pb have similar properties to carbon.

Reasons:

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Answer:

1 [tex]C_{3}H_{6}O_{2}[/tex] (g) + 6 [tex]O_{2}[/tex] (g) → 3 [tex]H_{2}O[/tex] (g) + 3 [tex]CO_{2}[/tex] (g)

Sunlight, wind, and water are considered renewable resources

Answer:

This problem is providing us with the mass of an unknown element which produces 43.5 g of M3N2. Thus, its name and molar mass are required and found to be 4.02 g/mol and calcium nitride after the following:

In chemistry, stoichiometry is a tool used for the calculation of masses or moles involved in chemical reactions, by the utilization of molar masses and mole ratios based on proportional factors.

In such a way, for the given reaction, one can use the formulas to write the following balanced chemical equation:

[tex]3M+N_2\rightarrow M_3N_2[/tex]

Where there is a 3:1 mole ratio of the metal to the product, which means we can use the following stoichiometric setup:

[tex]35.3gM*\frac{1molM}{x}*\frac{1molM_3N_2}{3molM} *\frac{(3x+14.01*2)gM_3N_2}{1molM_3N_2}=43.5gM_3N_2[/tex]

Now, by using the numbers only, one will be able to calculate x as the atomic mass of the element M in g/mol:

[tex]35.3*\frac{1}{x}*\frac{1}{3} *\frac{3x+14.01*2}{1}=43.5\\\\\frac{105.9x+989.106}{3x}=43.5\\ \\105.9x+989.106=130.5x\\\\989.106=130.5x-105.9x\\\\x=\frac{989.106}{130.5-105.9} =40.2g/mol[/tex]

Which matches with the molar mass of calcium. Moreover, we find its name as calcium nitride.

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Answer:

In all the problems below, the pressure and the amount of gas are held constant. Problem #1: Calculate the decrease in temperature (in Celsius) when 2.00 L at 21.0 °C is compressed to 1.00 L. Converting 147.0 K to Celsius, we find -126.0 °C, for a total decrease of 147.0 °C, from 21.0 °C to -126.0 °C.

Answer:

1.9L

Explanation:

edg 2023 chemistry A

Kwestrong is an Ojibwe event in which women of all ages run, bike and canoe to test their strength and endurance.

Kwestrong is an Ojibwe event that means "strong woman." It is an organization formed by Native women that fosters companionship while also building strength and endurance.

Kwestrong goal is about Native Women empowering and motivating one another to achieve their own fitness goals.

Therefore, we can conclude that, Kwestrong is an Ojibwe event in which women of all ages run, bike and canoe to test their strength and endurance.

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How temperature and air pressure play a role in creating wind.

Gases move from high-pressure areas to low-pressure areas. And the bigger the difference between the pressures, the faster the air will move from the high to the low pressure. That rush of air is the wind we experience.

hope it helps.

Aliyyah.

Winds are created by the change in temperature gradient which results in the difference in pressure causes the circulation of air from high pressure area to low pressure area that is called winds.

Wind is the circulation or passage of air from one region to the other over a pressure gradient. The pressure gradient is resulting from the uneven heating of the atmosphere.

According to Gay- Lussac's  law, the pressure of a gas is directly proportional to the temperature of the region. Thus as the temperature over an area increases pressure also increases.

The heat radiated from the sun is unevenly distributed in the earth atmosphere results in difference in pressure also. To balance this pressure difference, the air from high pressure region passes to low pressure region creating the winds.

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Answer:

for their fur

Explanation:

because the body is hunt

Answer:

this is the answer to the question 0.1962

Explanation:

4/20.18

=0.1962

Answer:

Metal is used in the making of wire because of its high conductivity. Metals are also ductile, so the making of wire is easy with metal.

Set up A will dissolve the 100g of sugar fastest in 1 L of water due to the inclusion of physical agitation in the form of stirring.

We have to note that energy and sometimes physical agitation are necessary in order to dissolve a solid in a liquid. In this case, we want to dissolve sugar in water.

Set up A in which the temperature is raised to 80 degrees with agitation will dissolve the 100g of sugar fastest in 1 L of water due to the inclusion of physical agitation in the form of stirring.

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Answer:

215 [C°].

Explanation:

1) if the given energy is Q, the initial temperature is t₀, the final temperature is t, then

2) Q=cm(t-t₀);

[tex]t=\frac{Q}{cm}+t_0;[/tex]

3) according to the formula above:

[tex]t=\frac{4500}{0.39*100}+100=215.[/tex]

Answer:

Explanation:

Charles Law: The volume of and ideal gas is directly proportional to the temperature when the pressure is kept constant

V₁ - initial Volume = 11.5 cm³ ; T₁ = Initial temperature = 415 K ;

V₂ - final volume  ;T₂ =final temperature = 200 K

[tex]\dfrac{V_{1}}{T_{1}}=\dfrac{V_{2}}{T_{2}}\\\\\\\dfrac{11.5}{415}=\dfrac{V_{2}}{200}\\\\\\\dfrac{11.5}{415}*200=V_{2}\\\\\\V_{2}=5.5 \ cm^{3}[/tex]

Answer: -1323 kJ mol^-1

Explanation:

[tex]\begin{aligned}&\mathrm{C}_{2} \mathrm{H}_{4(\mathrm{~g})}+3 \mathrm{O}_{2(g)} \longrightarrow 2 \mathrm{CO}_{2(g)}+2 \mathrm{H}_{2} \mathrm{O}_{(1)} \quad \Delta \mathrm{H}=? \\&\Delta \mathrm{H}=\left(\sum \Delta \mathrm{Hf} \text { products }\right)-\left(\sum \Delta \mathrm{Hf} \text { Reac tan ts }\right) \\&\Rightarrow[(2 \times-393.7)+(2 \times-241.8)]-[(52.3+0)] \\&\Rightarrow[-787.4 - 483.6]-52 \\&\Rightarrow-1323 \mathrm{~kJ} \mathrm{~mol}^{-1}\end{aligned}[/tex]

The enthalpy of combustion for the burning of ethylene is -1323.33 kJ/mol

The term combustion has to do with the burning of a particular substance in oxygen. In this case, the equation of the reaction is;

C2H4 + 3O2 ----->2CO2 + 2H2O

The enthalpy of combustion can be obtained from the relation;

ΔH rxn = [(2(-393.7) + 2(-241.8)] - [(52.3 + 3(0)]

ΔH rxn = (-787.4) + (-483.6) - 52.3

ΔH rxn = -1323.33 kJ/mol

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Braxtons dog eats 3 times more than Abbys

Answer:

Braxton's dog eats 3 times more food.

Explanation:

Answer:

Letrang A o B o C o D or Letter A or B or C or D