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The amount of water needed to prepare a 0.50 molal solution using 0.50 moles of sodium chloride is 1L.

The volume of a solution can be calculated using the following formula:

Volume = no of moles ÷ molarity

According to this question, 0.50 molal solution is used to prepare 0.50 moles of sodium chloride. The volume of the solution is calculated as follows:

Volume = 0.50 moles ÷ 0.5M

Volume = 1L

Therefore, the amount of water needed to prepare a 0.50 molal solution using 0.50 moles of sodium chloride is 1L.

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Answer:

Examples of complex compound include potassium ferrocyanide K4[Fe(CN)6] and potassium ferricyanide K3[Fe(CN)6]. Other examples include pentaamine chloro cobalt(III) chloride [Co(NH)5Cl]Cl2 and dichlorobis platinum(IV) nitrate [Pt(en)2Cl2](NO3)2.

Answer:

Precipitates Form

Explanation:

I apologize if I am wrong

Answer:

C.basket toss stunt

Explanation:

If you are on a competition cheerleading squad, making difficult cheerleading ... basket toss is considered an advanced cheerleading stunt

Answer:

C basket toss stunt

Explanation:

I am currently learning this and I would say Suspensions!

Hope this helps :)

Answer:

Fractional Distillation could be used to:

Fractional Distillation is used to obtain one substance from a mixture. It depends on the boiling points of the substances.

Kw = [H+][OH-]

[OH] = 1.0 x 10^-11 M

Kw = 1.0 x 10^-14

[H+] = Kw/[OH-] = 1.0 x 10^-14 / 1.0 x 10^-11 = 1.0 x 10^-3 M

The solution is acidic, because [H+] > [OH-].

Answer:

W and X

Explanation:

isotopes : are masses of atoms with the same number of proton and electron but different neutron .

W and X have the same number of protons and different number of neutrons.

Answer:

the third one.

Explanation:

According to law of conservation of mass,before and after the reaction copper sulfate and zinc metal interact, an atom of zinc replaces an atom of copper while the sulfate molecule, made of 5 atoms, is unchanged.  there are 5 atoms.

According to law of conservation of mass, it is evident that mass is neither created nor destroyed rather it is restored at the end of a chemical reaction .

Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.

Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Antoine Lavoisier in the year 1789.

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The periodic table brings order to information about the chemical elements. The chemical elements are arranged in order of increasing atomic number. The horizontal rows are called periods and the vertical columns are called groups. Elements in the same group have similar chemical properties.

Answer:

hope this helps

Explanation:

1M NaCl solution is 58.5 g/1000 ml , where molecular wt of NaCl being 58.5 grams , so 29.2 g of NaCl in 1000 ml of water will be equal to : 29.2g /58.5g = 0.499145299 M , so 29.2 g NaCl dissolved in 100 ml would correspond to , 0.499145299 M X 1000 ml/100 ml = 4.99145 M or about 4.99 M

Answer:

..... yep

Explanation:

tep no yep no hyshshshss

motion results in the kinetic energy of an object

Answer:

The South American and African plates moved apart as a divergent boundary formed between them and an ocean basin formed and spread. Students figure out: The Mesosaurus fossils moved apart gradually over tens of millions of years. Earth's plates travel at a rate too slow to be experienced by humans.

Explanation:

Answer:

plz write full equation

Answer:

yer

Explanation:

Answer:  3.36 L of ammonia gas

Explanation:

The balanced chemical reaction is:

[tex]N_2(g)+3H_2(g)\rightarrow 2NH_3(g)[/tex]  

According to stoichiometry :

3 moles of [tex]H_2[/tex] produce = 2 moles of [tex]NH_3[/tex]

Thus 0.75 moles of [tex]H_2[/tex] will producee=[tex]\frac{2}{3}\times 0.75=0.50moles[/tex]  of [tex]NH_3[/tex]

But as percent yield is 30 %, amount of ammonia produced = [tex]\frac{30}{100}\times 0.50moles=0.15moles[/tex]

According to ideal gas equation:

[tex]PV=nRT[/tex]

P = pressure  = 1 atm

V = Volume  = ?

n = number of moles = 0.15

R = gas constant =[tex]0.0821Latm/Kmol[/tex]

T =temperature =[tex]273K[/tex]

[tex]V=\frac{nRT}{P}[/tex]

[tex]V=\frac{0.15\times 0.0820 L atm/K mol\times 273K}{1atm}=3.36L[/tex]

Thus 3.36 L of ammonia gas is obtained by reacting 0.75 moles of hydrogen with excess nitrogen.

3.36 L of ammonia gas.

The balanced chemical reaction is:

[tex]N_2(g) + 3H_2(g)\rightarrow 2NH_3(g)[/tex]

  According to the above reaction:- :

3 moles of [tex]H_2[/tex] produce = 2 moles of [tex]NH_3[/tex]

Thus 0.75 moles of  [tex]H_2[/tex] will produce[tex]\frac{2}{3} \times0.75=0.50\ mol\ NH_3[/tex]  

But as percent yield is 30 %, amount of ammonia produced = [tex]\frac{30}{100} \times0.50\ moles\\\\=0.15\ moles[/tex]

According to ideal gas equation:

[tex]PV=nRT[/tex]

P = pressure  = 1 atm

V = Volume  = ?

n = number of moles = 0.15

R = gas constant =0.0821 Latm\Kmol

T =temperature =273 K

[tex]V=\frac{nRT}{P} \\\\=\frac{0.15\ times0.0820\ Latm\Kmol\times273\ K}{1\ atm} \\\\=3.36\L[/tex]

Hence,  3.36 L of ammonia gas is obtained by reacting 0.75 moles of hydrogen with excess nitrogen.

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Answer:

When cells become damaged or die the body makes new cells to replace them. This process is called cell division. One cell doubles by dividing into two. Two cells become four and so on.

Explanation:

Answer:

molar mass of caco3 is

100.0869 g/ mol

Answer:

glucose

Explanation:

plants use sunlight water and the gases in the air to make glucose which is aform of sugar

Answer:

4Al + 3O₂ —> 2Al₂O₃

The coefficients are: 4, 3, 2

Explanation:

__ Al + __ O₂ —> __ Al₂O₃

The above equation can be balance as illustrated below:

Al + O₂ —> Al₂O₃

There are 2 atoms of O on the left side and 3 atoms on the right side. It can be balance by writing 3 before O₂ and 2 before Al₂O₃ as shown below:

Al + 3O₂ —> 2Al₂O₃

There are 4 atoms of Al on the right side and 1 atom on the left side. It can be balance by writing 4 before Al as shown below:

4Al + 3O₂ —> 2Al₂O₃

Now the equation is balanced.

The coefficients are: 4, 3, 2

Answer:

The given reaction in your problem is the ionic equation for an acid (carbonic acid) reacting with a base (sodium hydroxide). All components of the reaction are then written in ionic form except for reactant weak electrolytes and the driving force product compound of the reaction (H2O). See following explanation.

Explanation:

Metathesis Rxn: molecular equation of rxn      

H₂CO₃(aq) + 2NaOH(aq) => Na₂CO₃(aq) + 2H₂O(l)

Ionic Equation: shows all components of the reaction

H₂CO₃(aq) + 2Na⁺(aq) + 2OH⁻(aq) => 2Na⁺(aq) + CO₃²⁻(aq) + 2H₂O(l)

H₂CO₃(aq)  wk. electrolyte and H₂O(l) driving force compound are not shown ionized in ionic equation. Only strong electrolytes that ionize 100%; i.e., salts and strong acids and bases.

Net Ionic Equation: shows only the reactive components without the spectator ions (nonreactive components), in this case, the Na⁺(aq) ions.

H₂CO₃(aq) + 2OH⁻(aq) =>  CO₃²⁻(aq)  + 2H₂O(l)

Answer:

16

Explanation:

4 nitrogen (N) atoms and 12 (3×4) atoms in Hydrogen (H)

Total = 4 + 12 = 16 molecules

Answer:631 g

Explanation: bc i did the math

630.581 grams of soda ash would be needed to produce 1,000 g of sodium bicarbonate.

Moles can be related to the mass or weight of any substance as follow:

n = W/M, where

W = given mass

M = molar mass

Given balanced chemical equation for the formation of sodium bicarbonate is:

Na₂CO₃ + CO₂ + H₂O → 2NaHCO₃

From the stoichiometry of the reaction, it is clear that:

1 mole of Na₂CO₃ is required = to form 2 moles of NaHCO₃

Or 1/2 mole of Na₂CO₃ is required = to form 1 moles of NaHCO₃

Moles of NaHCO₃ be calculated by using the above formula as:

n = 1,000g (given) / 84.007g/mole = 11.90 moles

So, moles of Na₂CO₃ required to form 11.90 moles of NaHCO₃ = 11.90×1/2 = 5.95 moles

Now we convert the mole of Na₂CO₃ to grams by using the mole formula:

W = 5.95mole × 105.98g/mole = 630.581 grams.

Hence, 630.581 grams of soda ash would be needed.

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Answer:

The electromagnetic force is an important force in the chemical and biological sciences, as it is responsible for molecular connections like ionic bonding and hydrogen bonding.

Answer:

5308.16J

Explanation:

Using the formula;

Q = m × cp × ∆T

Where;

Q = change in heat (J)

m = mass of substance (g)

cp = specific heat capacity (4.184 J/g°C)

∆T = change in temperature (°C)

According to the information given in this question;

Q = ?

m = 27.58 grams

cp = 4.184 J/g°C

∆T = 62°C - 16°C = 46°C

Using Q = m × cp × ∆T

Q = 27.58 × 4.184 × 46

Q = 5308.157

Q = 5308.16J