Convert 49.3 grams of NaCl to moles of NaCl atoms

0.555 atm is the pressure of a fixed volume of a gas at 30.0C if it has a pressure of 1.11atm at 15C.

The ideal gas equation, pV = nRT, is an equation used to calculate either the pressure, volume, temperature or number of moles of a gas.

According to Ideal Gas Equation,

PV = nRT

Therefore, P ∝ T

P₁T₂ = P₂T₁

Given :

P₁ = ?

P₂ = 1.11 atm

T₁ = 30.0 C

T₂ = 15 C

Solving :

P₁ x 30 = 1.11 x 15

P₂ = 0.555 atm

Hence, 0.555 atm is the pressure of a fixed volume of a gas at 30.0C if it has a pressure of 1.11atm at 15C.

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1: Biosphere

2: Atmosphere

3: Hydrosphere

4: Atmosphere (I think?)

5: Stratosphere

6: Biosphere

7: Hydrosphere

8: Geosphere

:)

Answer:

The grey squirrel.

Explanation:

This is your answer because the white one would have a harder time to blend in with the tree's and the environment, whilst the grey one is better suited for its environment better due to the fact that it can blend in with the trees, and hide better.

Answer:

Its Neon

Explanation:

Why ? Because Neon is the fastest it can go to 435 m/s and thats one of the fastest element there.

Helium would have the fastest rate of diffusion. Therefore, option (C) is correct.

Graham’s law states that the rate of diffusion of a gas is inversely proportional to the square root of the molecular weight of that gas.

According to Graham’s Law, molecules of gas with lower molecular mass at constant pressure and temperature will diffuse faster than the higher molecular mass molecules. This formula is commonly utilized to compare the rates of diffusion of two different gases at the same pressures and temperatures.

[tex]\frac{Rate_1}{Rate_2} =\sqrt{\frac{M_2}{M_1} }[/tex]

Where M₁ is the molar mass of gas 1 while M₂ is the molar mass of gas 2.

The atomic mass of He, Ne, Ar, and Ke is 4, 20, 40, and 83 g/mol. The helium gas has the lowest atomic mass so it has the highest rate of diffusion while Krypton has the lowest rate of diffusion.

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The molarity of a substance is simply defined as the mole of solute per unit litre of the solution. Mathematically, it is expressed as:

[tex]Molarity = \frac{mole}{volume }[/tex]

From the question given above, the following data were obtained:

Molarity of KCl = 2.45 M

Mole of KCl = 0.5 mole

The volume of KCl needed can be obtained as follow:

[tex]Molarity = \frac{mole}{volume }\\\\2.45 = \frac{0.5}{Volume }[/tex]

Cross multiply

2.45 × Volume = 0.5

Divide both side by 2.45

[tex]Volume = \frac{0.5}{2.45}\\[/tex]

Therefore, 0.20 L is needed to make the solution.

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Assuming the reaction is complete, there should be no limiting reactant remaining after a reaction. This is because the limiting reactant, by definition, is "the reactant that is completely used up in a reaction."

radiation is energy that comes from a source. (travels through the speed of light)

Answer:

1. answer is subcutaneous tissue 2. answer is spleen

Explanation:

The subcutis is also known as the hypodermis or subcutaneous layer, and functions as both an insulator, conserving the body's heat, and as a shock-absorber, protecting the inner organs.

Excretory Organs. Organs of excretion include the skin, liver, large intestine, lungs, and kidneys. Together, these organs make up the excretory system.

Answer:

the answer is Subcutaneous Tissue

Explanation:

and the second one is Intestine

Answer: The fourth material that is added to the blast furnace is HOT AIR which provides OXYGEN for used for combustion of carbon (Coke).

Explanation:

Iron is the second most abundant metal found in the earth's crust after aluminium. It is not found in the free metallic state but are extracted from rocks which are rich in iron that contains other materials. These are known are iron ores and the most common iron ores are haematite ( Fe2O3).

Iron can be extracted from its ore with the used of blast furnace. The materials used for extraction of iron includes:

--> Coke

--> haematite( iron ore)

--> limestone and

--> Hot air.

The iron ore is first roasted in air so that iron(III)oxide is produced. The iron(III)oxide is then mixed with coke and limestone and heated to a very high temperature. Hot air is introduced into it from the bottom of the furnace. The coke is oxidizes the the oxygen in the hot air blast to liberate carbondioxide.

Answer:

The process of photosynthesis occurs when green plants use the energy of light to convert carbon dioxide (CO2) and water (H2O) into carbohydrates. Light energy is absorbed by chlorophyll, a photosynthetic pigment of the plant, while air containing carbon dioxide and oxygen enters the plant through the leaf stomata.

Answer:

True.

Explanation:

Answer:

23 g sodium

Explanation:

In chemistry, one mol (1mol) of a substance equals Avagadro's number or constant (6.02 × 10^23 atoms/particles/molecules).

According to this question in which the mass of different elements were given, the mass of the element that equals 6.02 × 10^23

Using the formula; mole = mass/molar mass

- Sodium = 23g/23g/mol = 1mol

- Krypton = 42g/84g/mol = 0.5mol

- Carbon = 24g/12g/mol = 2mol

- Pottasium = 78g/39g/mol = 2mol

Therefore, from the above illustration, it can be observed that only 23g of sodium contains 1 mol, hence, 23g sodium contains 6.02 × 10^23 atoms.

Answer:

C

Explanation:

Answer:

0.19g NaCl

Explanation:

Multiply the volume by the  concentration to get the moles. Then, convert moles to grams which gives you that.

Answer:

make sure that the number of atoms on the left side of the equation equals the number of atoms on the right.

Explanation:

A chemical reaction can be balanced by multiplying each side with suitable integers such  that the number of each element in the reaction must be equal number on both side.

According to the law of conservation of mass for  a chemical reaction, the total mass in the reactant side is equal to the total mass in the product side. Thus, a balanced chemical equation represents the perfect stoichiometry for each reactants and products.

The number of each elements in both side have to be equal in number. If they are unequal on both side, we can balance the reaction by multiplying with suitable integers.

Lets have one example. Consider the given reaction.

[tex]\rm CH_{4} + O_{2} \rightarrow H_{2}O + CO_{2}[/tex]

Here, 4 H are in left side and only 2 in right side. Similarly number of oxygen also not balanced.

The balanced equation requires a coefficient of 2 for water and 2 for oxygen in reactant thus, it can be written as:

[tex]\rm CH_{4} + 2O_{2} \rightarrow 2H_{2}O + CO_{2}[/tex]

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Answer:

A

Explanation:

I looked it up and this was the answer for your question

Answer:

Mitochondria are the "powerhouses" of the cell, breaking down fuel molecules and capturing energy in cellular respiration. Chloroplasts are found in plants and algae. They're responsible for capturing light energy to make sugars in photosynthesis.

Answer:

0.00731 kg

Explanation:

Given that solution is a product of solute and solvent.

Hence, solution = solute * solvent

In this case, the solution is given as 0.950 grams = 0.00095 kilograms

solute is given as 130 grams = 0.13 kilograms

Hence to get the amount of solvent in kilograms, we have

Solution ÷ Solute => 0.00095 ÷ 0.13

= 0.0073076923

=> 0.00731 kilograms

Answer:

Digestive

Explanation:

Explanation:

[tex]2CH _{3}CH_{3}COOH + Na _{2}CO_{3} → 2CHCHCOONa + 2H ^{ + } + CO_{3} ^{ 2- } [/tex]

Answer:

At 4°C what is not able to decompose into hydrogen and oxygen chemical changes cannot be reverted, in this case it can. It will not change color, because water is always clear, and won't at this state turn into ice. though it can be reverted.

Explanation:

I hope that is correct that's all I've learned so far!

Answer:

A) Its temperature

Explanation:

Answer:

utcluclult

Explanation:

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Answer:

no WAYYYYYYY ITS SO EASY!!111!11

Explanation:

Answer:

10 watts

Explanation:

Power = Work / time

Power = 50 J / 5 s

Power = 10 watts

The power that is necessary to do 50 joules of work in 5 seconds is 10 watts

Power is the amount of transfer of energy or converted per unit of time. Power is equal to energy divided by time. The SI unit of power is the watt. The three equations of power are:

P = Et.

P = Wt.

P = V2R.

Work is the transfer of energy from one body by the application of force. Work can be calculated by dividing force into displacement. Joule is the quantity by which work is calculated. The third equation will be used to calculate power.

There are different types of power that are used in doing work. They are legitimate, expert, reward, etc.

Given, 50 joules of work

Time is 5 seconds

Power = Work / time

Power = 50 J / 5 s

Power = 10 watts

Thus, the power is 10 watts.

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Balanced equation:

4 NH3 + 5 O2 = 4 NO + 6 H2O

Answer:

D. inorganic substances​

Explanation:

Inorganic lacks carbon, which is usually found in living things.