Theoretical yield: 35.0g
Actual yield: 27.7g
What is the percent yield?

Answer:

Gold is an element. That means that it is the same all the way through and in an ideal state of purity contains nothing but gold atoms. Therefore it is not a mixture. In such a case it is as close to a uniform solid solution as may be, so it will be an homogeneous mixture.

Explanation:

really hope this helps :)

Answer:

A

Explanation:

HCl and NaOH is a strong acid and strong base, respectively, and hence dissociates completely and reacts to form water:

[tex]\displaystyle \text{H}_\text{(aq)}^+ + \text{OH}_\text{(aq)}^- \longrightarrow \text{H$_2$O}_\text{($\ell$)}[/tex]

We are given that 25.0 mL of 0.333 M NaOH was used to neutralize 15.0 mL of HCl.

Convert from moles of NaOH used to moles of HCl reacted:
[tex]\displaystyle \begin{aligned} 25.0\text{ mL} & \cdot \frac{0.333\text{ mol NaOH}}{1\text{ L}} \cdot \frac{1\text{ L}}{1000\text{ mL}} \cdot \frac{1\text{ mol OH}^-}{1\text{ mol NaOH}}\cdot \\ \\ & \cdot\frac{1\text{ mol H}^+}{1\text{ mol OH}^-} \cdot \frac{1\text{ mol HCl}}{1\text{ mol H}^+}\\ \\ & = 8.33\times 10^{-3}\text{ mol HCl}\end{aligned}[/tex]

Therefore, the molarity of the original HCl solution is:
[tex]\displaystyle \begin{aligned} \ [\text{HCl}] & = \frac{\text{ mol HCl}}{\text{L soln.}} \\ \\ & =\frac{8.33\times 10^{-3}\text{ mol HCl}}{15.0\text{ mL}} \cdot \frac{1000\text{ mL}}{1\text{ L}} \\ \\ & = 0.555\text{ M}\end{aligned}[/tex]

In conclusion, our answer is A.

Answer:

be specific it's too little information

Answer:

The correct answer is C. 6 Liters

Explanation:

You have to multiply the 2 liters by the atmospheres (which is 3) you get 6. six liters is the new volume.

Explanation:

From PV = nRT

9.67V = 12(0.0821)(467.5)

V = 47.63 L

Based on the chemical equation, to balance the given equation we should use 2 as a coefficients of HCl on reacatnt side of the reaction.

Balanced chemical equations are those equation in which each entities are present in same amount on reactant side as well as on the product side of the chemical reaction.

Given chemical reaction is:

Zn + HCl → ZnCl₂ + H₂

In the above reaction equation  is not balanced as number of chlorine and hydrogen atoms are not equal on both sides, so balanced equation will be:

Zn + 2HCl → ZnCl₂ + H₂

Hence we add 2 as a coefficient of HCl to balance the equation.

To know more about balance equation, visit the below link:

https://brainly.com/question/15355912

Answer:

1 2 1 1

Explanation:

Answer:

0.0800 (on CK-12)

Explanation:

Given grams of CuCl2/molar mass of CuCl2
27.2g/134.45g=0.2023...

Next,
0.2023mol/2.50L = 0.0800

The molality of the copper(II) chloride (CuCl₂) solution is 0.081 mol/kg

Molality is a measure of the number of moles of solute in a solution corresponding to 1 kg or 1000 g of solvent

First, we will determine the number of moles of CuCl₂ present

Using the formula,

[tex]Number\ of\ moles = \frac{Mass}{Molar\ mass}[/tex]

Mass of CuCl₂ = 27.2 g

Molar mass of CuCl₂ = 134.45 g/mol

∴ Number of moles of CuCl₂ present = [tex]\frac{27.2}{134.45 }[/tex]

Number of moles of CuCl₂ present = 0.2023 mole

Now, for the molality of the solution

Volume of solvent (water) = 2.50 L

Since the density of water = 1kg/L

Then, mass of the solvent (water) = 2.50 kg

[tex]Molality = \frac{Number\ of\ moles}{Mass\ of\ solvent}[/tex]

∴ Molality of the solution = [tex]\frac{0.2023}{2.50}[/tex]

Molality of the solution = 0.081 mol/kg

Hence, the molality of the solution is 0.081 mol/kg

Learn more on Calculating molality here: https://brainly.com/question/12323213

#SPJ2

Answer:

c. sun, radiation

Explanation:

Answer:

Cobalt (Co)

Explanation:

it has 27 protons and atomic mass of 60 in Cobalt 60 isotope

Answer:

active carriers

Explanation:

Mosquitoes are responsible for transmitting the zika virus. In this case, the mosquitoes are active carriers

Answer:

E -- active carriers

Explanation:

the mosquitos would be active carriers...

Hope this helps! Please let me know if you need more help or think my answer is incorrect. Brainliest would be MUCH appreciated. Also remember to rate answers to help other students, While leaving thanks to answers that help you. Have a great day!

Which of these involves the formation of a new chemical substance?

a. evaporation of gasoline

b. mixing salt and pepper

c. dissolving sugar in tea

d. rusting of an iron chain

[tex] \\ [/tex]

[tex]__________[/tex]

A. Evaporation of gasoline

B. Mixing salt and pepper

C. Dissolving sugar in tea

D. Rusting of an iron chain

Hence, the answer is D. Rusting of an iron chain.

Answer:

a. BH₃

Explanation:

According to the octet rules, atoms reach stability when are surrounded by eight electrons in their valence shell when they combine to form a chemical compound.

From the options, the only compound in which the central atom does not meet the octet rules is BH₃. The central atom is boron (B), which has 3 electrons in its valence shell. When B is combined with hydrogen (H), 3 electrons from the 3 atoms of H are added. The total amount of electrons is 6, fewer than 8 electrons needed to meet the rule.

hope this helps

Answer:

About 10.7 grams.

Explanation:

The reduction reaction is represented by:
[tex]\displaystyle \text{Sn}^{2+}_\text{(aq)} + 2e^- \longrightarrow \text{Sn}_\text{(s)}[/tex]

A current of 3.46 amperes (C/s) is passed through the solution for 1.40 hours. The total amount of charge is hence:
[tex]\displaystyle 1.40\text{ hour} \cdot \frac{3600\text{ s}}{1\text{ hour}}\cdot \frac{3.46\text{ C}}{1\text{ s}} = 1.74\times 10^4\text{ C}[/tex]

One mole of solid Sn is transferred per two moles of electrons. Hence, using Faraday's constant:
[tex]\displaystyle 1.74\times 10^4\text{ C} \cdot \frac{1\text{ mol e$^-$}}{96485\text{ C}} \cdot \frac{1\text{ Sn}}{2\text{ mol e$^-$}}\cdot \frac{118.71\text{ g Sn}}{1\text{ mol Sn}} = 10.7\text{ g Sn}[/tex]

In conclusion, about 10.7 grams of tin is plated out of the solution.

Answer:

alpha emission

Explanation:

The maximum pH an aqueous solution of 0.050 M Cu(NO3)2  is mathematically given as

pH=5.8

Generally, the equation for the Chemical reaction  is mathematically given as

Cu(OH)2----><---Cu^2 +2OH-

Therefore

s^2=1.0*10^{-19}

s=3.16*10^{=9}

{OH-}=2s=6.3*10^10^{-19}

{H+}=10^{-14}/OH

{H+}=1.58*10^{-6}

In conclusion

pH=-log(1.58*10^{-6}

pH=5.8

Read more about Chemical reaction

https://brainly.com/question/16416932

Answer:

The 18th-century German physicist Daniel Gabriel Fahrenheit originally took as the zero of his scale the temperature of an equal ice-salt mixture

Explanation:

Answer:

salt is solute,water solvent, the mixture is the solition.

A student dissolves 15 grams of salt in 250 mL of water. The solute is salt and the solvent is water.

A solution is a homogeneous mixture of one or more solutes dissolved in a solvent.

For solutions with components in the same phase, the substances present in lower concentration are solutes, while the substance present in highest abundance is the solvent.

Therefore, A student dissolves 15 grams of salt in 250 mL of water. The solute is salt and the solvent is water.

Learn more about Solutions, here:

https://brainly.com/question/30665317

#SPJ3

Answer:

B water density increases and rises to the top of the sea

Explanation:

i took a test and got it correct lol

Answer:

The onion cells release compounds into the air, and enzymes must follow up to alter amino acids into other compounds, causing irritation in the eye. To prevent, "crying" from an onion, try peeling the onion, then chilling the onion in the fridge for about 30 minutes. Otherwise, you can buy tearless onions.

LOL... I don't think my beautiful drawing helps a ton.

But basically in a potential energy diagram, the height distance between the reactants and products is the ∆H, aka the enthalpy change.

If the reactants are higher than products, then the reaction is exothermic.

If the products are higher than reactants, then the reaction is endothermic.

Answer:

Option C

Explanation:

Answer:

The rate of the forward reaction equals the rate of the reverse reaction.

Explanation:

Based on the information provided and the assumption that the mole ratio of the acid to the base is 1:1, the molarity of the acid would be 0.0425 M

Using the equation:

CaVa = CbVb

This is based on the assumption that the stoichiometric mole ratio of the acid to the base is 1:1.

Ca = CbVb/Va

                   0.1 x 25.5/60 = 0.0425 M

More on acid/base titration can be found here: https://brainly.com/question/2728613

Answer:

44.2 g NO

Explanation:

Question is posted elsewhere, be sure to search before posting to save yourself some time :)

Answer:

Because ions in an aqueous solution are free to move independently from each other. the net flow of cations toward a negative or positive electrode results in a flow of charge, which is an electrical current.

Explanation:

Answer: 4.7 L

Explanation:

Answer:

an energy source

Explanation:

The reaction equation is:

HI(aq) + KOH(aq) → KI(aq) + H2O

1 mol HI reacts with 1 mol KOH

In your problem you have:

Mol HI in 10 mL of 1M solution = 10mL/ 1000 mL/L * 1 mol /L = 0.01 mol HI

Mol KOH in 5 mL of 1 M solution = 5 mL / 1000 mL/L * 1 mol /L = 0.005 mol HI

The 0.005 mol of KOH will neutralise 0.005 mol of HI - leaving 0.005 mol HI unreacted in 15 mL solution

This solution will be acidic

I guess that that answers your question - But you may be interested in calculating the pH of the solution

Have a great day!

Answer:

The law of conservation of matter says that matter cannot be created or destroyed.

Explanation:

Answer:

Atoms don’t appear or disappear during the reaction. Instead, they get rearranged.

Explanation:

Edmentum answer

Answer: D

Explanation:

The litmus paper will help determine the pH, and thus if it is an acid or a base.