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[tex]\huge\fbox{Answer ☘}[/tex]

It is given in the question that 200.0 grams of sodium hydroxide reacts with excess of sulphuric acid.

The given reaction is shown below

[tex]\bold\blue{2NAOH + H _{2}SO _{4} \: - > 2H _{2} O+ NA _{2}SO_{4} }\\ [/tex]

In this reaction, two mole of sodium hydroxide react with one mole of sulphuric acid to give two mole of water and one mole of sodium sulfate.

To determine the mass of sodium sulfate, first calculate the moles of sodium hydroxide as the value of mass is provided.

The molecular weight of NaOH is 40 g/mol.

The formula is shown below.

[tex]\pink{n = \frac{m}{ M}}\\[/tex]

Where,

✫ n is the number of moles

✫ m is the mass

✫ M is the molecular weight

To calculate the number of moles, substitute the values in the above equation.

[tex]\pink{n = \frac{200.0}{40g \: mol {}^{ - 1} } } \\ \\\pink{ ⇢n = 5}[/tex]

In the equation it is given that 2 mole of sodium hydroxide gives 1 mole of sodium sulphate.

So, to determine the actual mole of sodium sulfate divide the calculated moles of NaOH by 2.

[tex] \pink{⇢ \frac{5}{2}} \\ \\ \pink{⇢ 2.5 \: mol}[/tex]

So 2.5 mol sodium sulfate is formed from 5 mol NaOH.

The molecular weight of sodium sulfate is 142.1 g/mol.

To calculate the mass of sodium sulfate, substitute the values in the formula.

[tex] \pink{⇢2.5 = \frac{m}{142.1g \: mol {}^{ - 1} } } \\ \\\pink{ ⇢ m = 2.5 \times 142.1 }\\ \\ \pink{⇢ m = 355.25}[/tex]

Therefore, the mass of sodium sulfate formed when we start with 200.0 grams of sodium hydroxide and you have excess sulphuric acid is 355.25g.

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Answer:

500 m/s

Explanation:

Wave Speed=Frequency x Wavelength

=50x10

=500

Answer:

A. 22.41

Explanation:

goodluck man, just typing a little bit more for the 20 words

Answer:

22.4liters

Explanation: I did it in a quiz.

Answer:

Which of the following is NOT a property of Alkali Metals?

A) They form ions with a charge of +2.

B) They are lustrous.

C) They are extremely reactive with water.

D) They are good conductors of heat and electricity. Previous

Explanation:

The Answer is D.

pls brainlieast me

Decomposition is a chemical reaction that breaks the reactant into two or more products. Moles of nitrogen gas [tex](\rm N_{2})[/tex] in the cylinder is 1.63 moles.

The ideal gas equation states the relation of the hypothetical ideal gas according to the pressure, volume, temperature and moles of the gas. It is given by,

[tex]\rm PV = nRT[/tex]

Where,

Pressure (P) = 2000 kPa

Volume (V) = 2L

Temperature (T) = 295 K

Gas constant (R)=  0.08206

Substituting values  in the equation:

[tex]\begin{aligned} \rm n &= \rm \dfrac{PV}{RT}\\\\&= \dfrac{2000 \times (\dfrac{1}{101.325}) \times 2}{0.08206 \times 295}\\\\&= 1.63\;\rm mol\end{aligned}[/tex]

Therefore, 1.63 moles are produced.

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Answer:

1.63 moles.

Explanation:

Answer:

Carbon monoxide is harmful when breathed because it displaces oxygen in the blood and deprives the heart, brain and other vital organs of oxygen. Large amounts of CO can overcome you in minutes without warning — causing you to lose consciousness and suffocate.

please please please please please please

Answer:

You need two potassium atom to form an ionic bond with one sulfur atom. Pottassium ions are formed by donating losing their electrons in the outermost shell, thr lost electrons are gained by sulphur atom to form 2K+ and S2-, respectively. The attraction between the positive ions and negative ions gives rise to the ionic bond and the molecular formula is K2S

Explanation:

Answer:

the more hydrogen ions present, the lower the pH; conversely, the fewer hydrogen ions, the higher the pH.

Answer:

Theoretical yield

Explanation:

hope this helps :)

Answer : B) theoretical yield

percent yield = Actual yield : theoretical yield x 100%

actual yield = actual product

theoretical yield = the product that should be produced (from the calculation of the reaction coefficient)

Answer:

4

Explanation:

hope it helps you in the long run

Answer:

My Understanding:

Explanation:

2 Carbon, 7 Hydrogen, 1 Oxygen, 1 Hydrogen plus 2 Oxygen is the reactants of 1 Carbon, 2 Oxygen plus 2 Hydrogen, and 1 Oxygen.

This question is asking for the pH of a buffer solution between ammonia and nitric acid, with given volumes and concentrations. At the end, the result turns out to be 10.488.

In chemistry, buffers are known as substances attempting to hold a relatively constant pH by mixing and acid and a base (weak and strong). In such a way, for the substances given, the first step will be to calculate the consumed moles as they are mixed:

[tex]n_{NH_3}=0.1L*0.1mol/L=0.01mol\\\\n_{HNO_3}=0.09L*0.1mol/L=0.009mol[/tex]

Now, since ammonia is in a greater proportion, one can calculate how much of it is left after being consumed by the nitric acid:

[tex]n_{NH_3}^{left}=0.01mol-0.009mol=0.001mol[/tex]

And its new concentration:

[tex][NH_3]=\frac{0.001mol}{0.1L+0.09L} =0.00526M[/tex]

Next, with ammonia's ionization:

[tex]NH_3+H_2O\rightleftharpoons NH_4^++OH^-[/tex]

We set up the equilibrium expression based on ammonia's Kb:

[tex]Kb=\frac{[NH_4^+][OH^-]}{[NH_3]}[/tex]

Which can be solved by introducing x and using ammonia's Kb:

[tex]1.8x10^{-5}=\frac{x^2}{0.00526M}\\ \\[/tex]

Then, we solve for x which is also equal to the concentration of ammonium and hydroxide ions in the solution:

[tex]x=\sqrt{0.00526*1.8x10^{-5}}=0.000308M[/tex]

Ultimately, we calculate the pOH and then turn it into pH with:

[tex]pOH=-log(0.00308)=3.512\\\\pH=14-3.512=10.488[/tex]

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Answer:

Explanation:

Not Many

1 mol of CO has a mass of

C = 12

O = 16

1 mol = 28 grams.

1 mol of molecules = 6.02 * 10^23

x mol of molecules = 3.14 * 10^15        Cross multiply

6.02*10^23 x = 1 * 3.14 * 10^15             Divide by 6.02*10^23

x = 3.14*10^15 / 6.02*10^23

x = 0.000000005 mols

x = 5*10^-9

1 mol of CO has a mass of 28

5*10^-9 mol of CO has a mass of x                        Cross Multiply

x = 5 * 10^-9 * 28

x = 1.46 * 10^-7 grams

Answer: there are 1.46 * 10-7 grams of CO if only 3.14 * 10^15 molecules are in the sample

Explanation:

both reduction and oxidation are occurring simultaneously, this is known as a redox reaction. An oxidizing agent is substance which oxidizes something else. In the above example, the iron(III) oxide is the oxidizing agent. A reducing agent reduces something else

The oxygen atoms undergo reduction, formally gaining electrons, while the carbon atoms undergo oxidation, losing electrons. Thus oxygen is the oxidizing agent and carbon is the reducing agent in this reaction.

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[tex]darkprincess[/tex]

#carryonleraning

Answer:

4s

4p

4d

4f

these are the four quantum numbers

Answer:

the energy possessed by a body by its value of its position relative to others, stresses within itself, electric charge, and other factors.

Explanation:

The procedural steps in order to get iodinate salicylamide are as follows:

The Electrophilic aromatic substitution is known to be a kind of an organic reaction where an atom is said to be added or attached to a kind of aromatic structure (that is made up of hydrogen) is said to be replaced by an electrophile.

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STP (Standard Temperature and Pressure):

At STP, 1 mole of an ideal gas will occupy a volume of 22.4 liters (Note: the new defined STP volume is 22.7 liters).

The volume is 77 L .

3 moles of oxygen at STP will occupy a volume of 3×22. 4=67. 2 L.

1.5 moles of oxygen at stp = 22.4 x 1.5 = 33.6 litres.

Therefore , number of moles of oxygen is : Now , we know volume of 1 mole of gas at S.T.P is 22.4 liters . Therefore , volume of 0.1 mole of oxygen at S.T.P is : Therefore , the volume of 3.2 gram atom of oxygen at S.T.P is 2.24 liters .

Helium is the largest, so that’s going to have the largest volume. Because at STP, volume was going to be equivalent to moles of gas.

Therefore, chemists introduced the concept of molar volume. Molar volume of a gas is defined as the volume of one mole of the gas. Thus, the molar volume is also the volume occupied by 6.02 x 1023 particles of gas. The molar volume of any gas is 22.4 dm3 mol–1 at STP or 24 dm3 mol–1 at room conditions.

oxygen gas

One mole of oxygen gas occupies 22.4 l volume at STP.

67.2 liters

The answer depends on the temperature and pressure. If the gas is at STP, THE 1 mole is 22.4 liters. 3 moles x 22.4 L/mol = 67.2 liters.

Well, assuming that the hydrogen gas is contained at STP , then the molar volume would be 22.7⋅3=68.1 L .

0.5 moles⋅22.4 L/mol=11.2 L , and so on.

The molar volume of any gas at S.T.P. is 22.4L .

So, the volume of an ideal gas is 22.41 L/mol at STP. This, 22.4 L, is probably the most remembered and least useful number in chemistry.

At STP, one mol of Ideal Gas occupies 22.4 L and one mmol of Ideal Gas occupies 22.4 mL.

Answer:State the number of valence electrons for a hydrogen atom and a bromine atom in a covalent bond.

Explanation:

Answer:

the answer is I'm pretty that it's

Explanation:

Ur Wellcome

Rubidium sulfide( Rb2S)

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Half-life can be given as the time required by the substance to reduce to half of its original concentration. The original mass of Uranium was 11.2 grams.

The half-life for the reaction can be expressed as;

[tex]A_t=A_0(\dfrac{1}{2})^\dfrac{t}{t1/2}[/tex]

Where the final mass of the product is, [tex]A_t=1.40\;\rm g[/tex]

The time for the reduction is given as, [tex]t=206.7\;\rm years[/tex]

The half-life of the compound is given as, [tex]t1/2=68.9\;\rm years[/tex]

The original concentration ([tex]A_0[/tex]) of the Uranium is given as,

[tex]\rm 1.40\;g=\textit A_0(\dfrac{1}{2} )^{\dfrac{206.7}{68.9}}\\\\1.40\;g= \textit A_0(\dfrac{1}{2} )^3\\\\\textit A_0=11.2\;\rm grams[/tex]

The original mass of uranium-232 has been 11.2 grams.

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Answer:

true

Explanation:

Answer: When two light bulbs are connected in parallel, which is true? A. The total resistance is less than the resistance of either bulb alone. B. The Voltage provided

Explanation:

Answer:

D. Only the top two bulbs would be lit.

Explanation:

When you connect the top light bulb, both the top and middle light bulbs will be lit. But, the bottom light bulb will not be lit because it is not connected. In order for a light bulb to be lit, it has to be connected on both sides by wire.

< Hope this helps! :)

Answer:

A

Explanation:

Mixing chemicals does not always lead to a chemical change.

Mixing chemicals always leads to a chemical change would not provide the student with evidence that a chemical reaction has occurred.

In a chemical reaction, one or more substances also known as reactants are changed into one or more additional substances also known as products. Chemical elements or chemical compounds make up substances.

When substances or compounds undergo a chemical transformation to create new substances or compounds, a chemical reaction takes place. Chemical equations use symbols and the chemical formulae of the molecules involved in the reaction to express chemical processes.

Cells, animals, people, and insects may all grow, develop, reproduce, and adapt thanks to chemical processes.

Thus, option A is correct.

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Answer:

there are 4 moles in 223.2 g Iron (Fe)

Answer:

The change from a liquid phase to a gaseous phase.

so the answer would be it changed to a gaseous phase

---------------

This is what occurs when the vapor pressure of the liquid is equal to the atmospheric pressure exerted on the liquid.