acides and basis

50 points,s

only smart people can answer

Answer: 1.2 M

Explanation:

molarity = (moles of solute)/(liters of solution) = 2.4 / 2.0 = 1.2 M

The answer choice which represents a physical property of Iron is; Choice C; solid at room temperature.

Physical properties of elements are properties observed and measured without changing the makeup, or composition, of a substance. They include characteristics such as color, density, and temperature of phase changes such as melting point or boiling point.

On this note, the fact that iron is solid at room temperature is a physical property.

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Answer:

Mode of transportation and source of energy

Energy sources are used in several major ways

Gasoline is used in cars, motorcycles, light trucks, and boats. Aviation gasoline is used in many types of airplanes. Distillate fuels are used mainly by trucks, buses, and trains and in boats and ships. Jet fuel is used in jet airplanes and some types of helicopters.

Explanation:

Answer:

EIA projects less than a quarter of the world's electricity generated from coal by 2050. net electricity generation by fuel.

Explanation:

Fossil fuels are an important natural resource used by society and they are organic fuels derived from ancient plants and animals.

Fossil fuels are the natural resources means they are derived from the ancient resdue of plants and animale due to theor decomposition under high temperature and pressure.

So, fossil fuels are organic fuels derived from ancient plants and animals.

Answer:

B cuh

Explanation:

trust me cus im just smart like dat

Answer:

Is this what you're looking for?

Explanation:

Answer:

B

Explanation:

Recall the law of effusion:

[tex]\displaystyle \frac{r_1}{r_2} = \sqrt{ \frac{\mathcal{M}_2}{\mathcal{M}_1} }[/tex]

Because 5 mol of oxygen was effused in 10 seconds, the rate is 0.5 mol/s.

Let the rate of oxygen be r₁ and the rate of hydrogen be r₂.

The molecular weight of oxygen gas is 32.00 g/mol and the molecular weight of hydrogen gas is 2.02 g/mol.

Substitute and solve for r₂:

[tex]\displaystyle \begin{aligned} \frac{(0.5\text{ mol/s})}{r_2} & = \sqrt{\frac{(2.02\text{ g/mol})}{(32.00\text{ g/mol})}} \\ \\ r_2 & = \frac{0.5\text{ mol/s}}{\sqrt{\dfrac{(2.02\text{ g/mol})}{(32.00\text{ g/mol})}}} \\ \\ & = 2.0\text{ mol/s}\end{aligned}[/tex]

Because there are 5 moles of hydrogen gas:

[tex]\displaystyle 5.0\text{ mol} \cdot \frac{1\text{ s}}{2.0\text{ mol}} = 2.5\text{ s}[/tex]

In conclusion, it will take about 2.5 seconds for the hydrogen gas to effuse.

Check: Because hydrogen gas is lighter than oxygen gas, we expect that hydrogen gas will effuse quicker than oxygen gas.

Answer:

Explanation:

Particles in both liquids and gases (collectively called fluids) move randomly. This is called Brownian motion. They do this because they are bombarded by the other moving particles in the fluid. Larger particles can be moved by light, fast-moving molecules.

Answer:

Simple distillation is the method used to separate substances in mixtures with significantly different boiling points, while fractional distillation is used for mixtures containing chemicals with boiling points close to each other.

Answer:

.02232 mole

Explanation:

At STP each 22.4 liters is a mole

.5 liters / 22.4 l/mole = .02232 mole

Answer: 5.10 L

Explanation:

large iguanas are affected by el nino temperatures

because algae do not grow as rapidly with el nino temperatures

survival rates for the larger iguanas drop

if they are bigger than 36 centimeters

the drop happens beginning with sizes around 40 centimeters

Answer: I believe in you.

Explanation:

studdy. You got this buddy!

road transport

hope it helps...!!!

Answer:

1. road

2. It evenly

3. system, subsystem, componet

4. control

5. combustion.

Hope this is helpful

The rate of reaction refers to how fast or slow a reaction is. The rate of reaction can be increased by;

i) Using finely divided sodium carbonate

ii) Increasing the temperature

Thee term rate of reaction refers to the pace of a chemical reaction. A reaction could be fast  or slow.

To increase the rate of this reaction;

i) The sodium bicarbonate could be used in the finely divided form.

ii) The temperature could be raised.

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Answer:

3

Hope it helpz~

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Answer: Heyo Kenji Here! Here's your answer- when chemical bonds between atoms are formed or broken. The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.

Explanation: ~Hope this helps!~

Have a nice day!

- Kenji ^^

We live immersed in a gaseous solution means that we are living in an environment where different types of gases are present.

When we talk about living in this gaseous solution, we means atmosphere. We know that atmosphere is the mixture of different gases.

So we can conclude that we live immersed in a gaseous solution means that we are living in an environment where different types of gases are present.

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Answer:

the wing shape and color

True statement for 1 mole of salt, water and hydrogen is that they have the same number of atoms and different masses.

Avogadro's Number is that number which tells about the number of entities present in one mole of any substance and it is equal to 6.022×10²³.

Means in one mole of any substance 6.022×10²³ number of atoms of that substance will present.

Relation between moles and mass will be represented as:

n = W/M, where

W = given mass

M = molar mass

So for any given moles, mass of substance will be different as molar mass of all substances are different.

According to given two concepts in 1 mole of salt, water and hydrogen same number of atoms are present but they all will have different masses.

Hence, they have the same number of atoms and different masses.

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Answer:

D. They have different masses

Explanation:

Answer:

0.025L of 2M HCl

Explanation:

This is a dilution problem involving the equation

[tex]M_1V_1 = M_2V_2[/tex]

Where M is molarity in grams/liter and V is volume in liters, and 1 and 2 represent initial and final states, respectively.

We know that:

[tex]M_1[/tex] = 2, as 2M HCl is the starting substance

[tex]M_2[/tex] = 0.05, as 0.05M HCl is the desired final substance

[tex]V_2[/tex] = 1, as 1 L is the desired volume of the final substance

Now you can solve for [tex]V_1[/tex].

[tex]2V_1 = 0.05(1)\\V_1 = \frac{0.05}{2} \\V_1 = 0.025[/tex]

Therefore, 0.025L of 2M HCl is needed to make 1 L of 0.05M HCl

The final temperature of the sample, in degrees Celsius is 36.6 °C

From the question, we are to determine the final temperature of the sample

From the formula for heat capacity, we have that

Q = mcΔT

Where Q is the heat energy

m is the mass

c is the specific heat capacity of the subtance

ΔT is the change in temperature ([tex]\Delta T= T_{f} -T_{i}[/tex])

From the given information

m = 687.6 g

Q = 8284.4 J

[tex]T_{i}[/tex] = 23.1 °C

Putting the parameters into the equation, we get

[tex]8284.4 = 687.6 \times 0.89 \times (T_{f} -23.1)[/tex]

NOTE: Specific heat capacity of aluminum = 0.89 J/ g °C

Then,

[tex]8284.4 = 611.964 \times (T_{f} -23.1)[/tex]

[tex](T_{f} -23.1)= \frac{8284.4}{611.964}[/tex]

[tex](T_{f} -23.1)= 13.5[/tex]

[tex]T_{f} = 13.5 + 23.1[/tex]

[tex]T_{f} = 36.6 \ ^\circ C[/tex]

Hence, the final temperature of the sample, in degrees Celsius is 36.6 °C

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Answer:

I believe your answer would be, "A" A particle with two or more atoms bonded covalently.

Explanation:

The definition of a molecule;

A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.

The expression that can be used to determine Cl2O(g) is ;

[tex]S_{cl_{2}o(g) } ^{o} = 2S_{HCIO(g)} ^{o} - S_{H_{2}O(g) }^{o} - \beta S_{rxn} ^{o}[/tex]

The general expression for ΔS°rxn of a chemical reaction

ΔS°rxn = ∑mS°products - ∑nS°reactants

where ; m and n = stoichiometry coefficients

Considering the given reaction : H₂O(g) + Cl₂O(g) → 2HCIO (g)  

[tex]\beta[/tex]S°rxn  = [tex]2S_{HCIO(g)} ^{o} - S_{H_{2}O(g) } ^{o} - S_{Cl_{2}O } ^{o}[/tex] ------- ( 2 )

Rearranging the equation above

[tex]S_{cl_{2}o(g) } ^{o} = 2S_{HCIO(g)} ^{o} - S_{H_{2}O(g) }^{o} - \beta S_{rxn} ^{o}[/tex]

Hence we can conclude that The expression that can be used to determine Cl2O(g) is ;

[tex]S_{cl_{2}o(g) } ^{o} = 2S_{HCIO(g)} ^{o} - S_{H_{2}O(g) }^{o} - \beta S_{rxn} ^{o}[/tex]

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Given what we know, we can confirm that one possible solution to the problem of flammable methane from concentrating in landfills is to use biosolids.

Biosolids are organic matter that are created by recycling waste. These biosolids can act as a cover over landfills. The bacteria present in these solids then use this methane gas to create carbon dioxide gas. Though not ideal, this product is much less harmful to the environment than methane.

Therefore, we can confirm that one possible solution to the problem of flammable methane from concentrating in landfills is to use biosolids.

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The equation which balances the given chemical reaction between magnesium and oxygen is 2Mg + O₂ → 2MgO.

Balanced equations are those in which all of the entities on both the reactant and product sides are equal.

Given chemical reaction:

Mg + O₂ → MgO

Above reaction is not balanced as number of oxygens are not equal on both sides.

Because the amount of magnesium atoms is not equal, this is not a balanced equation.

Because the amount of oxygen atoms is not equal, this is not a balanced equation.

This is a balanced equation as number of each atoms are equal on both sides.

Because the amount of magnesium atoms is not equal, this is not a balanced equation.

Hence balanced equation is 2Mg + O₂ → 2MgO.

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