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zheka24 [161]
3 years ago
9

In the reaction between CO and Fe3O4, the theoretical yield in an experiment is calculated to be 47.2 g Fe. When a chemistry stu

dent carries out the experiment, the actual yield is 29.9 g Fe. Calculate the percentage yield. % Please show all work.
a. .633%

b 157%

c 63.3%

d .157%
Chemistry
2 answers:
il63 [147K]3 years ago
7 0

Answer:

c 63.3%

Explanation:

Hello,

In this case, the percent yield is a measure of how effective was carried the reaction out and it is mathematically defined as:

Y=\frac{m^{actual}}{m^{theoretical}} *100\%

Now, for the given actual and theoretical yields we obtain:

Y=\frac{29.9g}{47.2g} *100\%\\\\Y=63.3\%

Thus, the answer is c 63.3% .

Best regards.

dusya [7]3 years ago
6 0

Answer:

C. 63.3%

Explanation:

Theoretical yield = 47.2g

Actual yield = 29.9g

Percentage yield = ?

The percentage yield of a compound after chemical synthesis is the ratio of the actual yield to the theoretical yield multiplied by 100.

Percentage yield = (actual yield / theoretical yield) × 100

Percentage yield = (29.9 / 47.2) × 100

Percentage yield = 0.6334 × 100

Percentage yield = 63.34%

The percentage yield of Fe is 63.34%

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tino4ka555 [31]

The rectangular substance measures 3.60cm high, 4.21cm long, and 1.17cm wide. If the mass is 21.3g  substances density will be 1.20 centimeter cube.

<h3>What is density?</h3>

The density of any substance is the ratio of the mass of substance to the volume of the substance and the unit will be centimeter cube.

The volume of the substance will be 3.60cm high × 4.21cm long ×1.17cm wide = 17.7 milliliters.

                       density = mass of substance / volume of substance

Substituting the value in formula

                        Density = 21.3g /  17.7 milliliters.

                         Density =  1.20 centimeter cube.

Therefore,  rectangular substance measures 3.60cm high, 4.21cm long, and 1.17cm wide. If the mass is 21.3g  substances density will be 1.20 centimeter cube.

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4 0
2 years ago
Science question pleace answer!!
mylen [45]

Answer:

the humidity 80% at the temperature (20° C ) will have more water vapour because relative humidity is more at lesser temperature (20° C) and lower at higher temperature (40°C )

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6 0
3 years ago
The hydrolysis of tert-butyl chloride is given in the reaction below: (CH3)3CCl(aq) + H2O(l) → (CH3)3COH(aq) + H+(aq) + Cl-(aq)
Zanzabum

Answer : The order of the reaction with respect to water is, zero.

Explanation :

Rate law : It is defined as the expression which expresses the rate of the reaction in terms of molar concentration of the reactants with each term raised to the power their stoichiometric coefficient of that reactant in the balanced chemical equation.

The given chemical reaction is:

(CH_3)_3CCl(aq)+H_2O(l)\rightarrow (CH_3)_3COH(aq)+H^+(aq)+Cl^-(aq)

The general rate law expression for the reaction is:

\text{Rate}=k[(CH_3)_3CCl]^a[H_2O]^b      ..........(1)

where,

a = order with respect to (CH_3)_3CCl

b = order with respect to H_2O

R = rate  law

k = rate constant

As we are given that:

\text{Rate}=k[(CH_3)_3CCl]        ...........(2)

By comparing equation 1 and 2, we get:

a = 1 and b = 0

That means, the rate is depending only on the concentration of tert-butyl chloride.

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7 0
4 years ago
Please help me, Thank you!
babymother [125]

Answer:

amount of charge

Explanation:

Oxygen and sulfur are both in Group 16, which means they have a -2 charge. They have two more electrons than protons, making the charge of the ion negative.

Hope that helps.

4 0
3 years ago
Read 2 more answers
What volume of gold would be equal in mass to a piece of copper with a volume of 121 mL?
morpeh [17]
65.46

First density =mass/volume
So mass = density *volume
In this case mass = 8.96 * 121 = 1084.16 g
So in the question it is given that this mass will equal the mass of this piece of gold
But here the variable is changed, we want to find volume .
Volume= mass/density
Volume= 1084.16/19.3 =56.17 ml
(Mark me the brainliest if this was helpful!)
3 0
3 years ago
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