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DerKrebs [107]
3 years ago
5

Which of the following is not a reason why actual yield is less than theoretical yield?

Chemistry
1 answer:
Gnom [1K]3 years ago
5 0
Your answer is B, conservation of mass


Recall that percent yield is given by: %Yeild = actual yeild/theoretical yeild x100

During experiments, there are errors made:

• uncertainty in measurements

• losses of reactants and products

• impurity in reactants

• losses during separation (e.g. filtration or purification)

• Some side reactions might also happen.



Among the given options, only conservation of mass does not contribute to a lower actual yield compared to the theoretical yield.

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when copper wires are made, a copper rod is pulled into a narrower wire. Explain how metallic bonding allows this to happen
777dan777 [17]

Answer:

possibly because of the malleability of metals

Explanation:

In metallic bonding, electrons are delocalized and move freely among nuclei. When a force is exerted n the metal, the nuclei shift, but the bonds do not break, giving metals their characteristic malleability.

7 0
2 years ago
A 0.610 m aqueous solution of kbr has a total mass of 75.0 g. what masses of solute and solvent are present?
Drupady [299]
To determine the masses of each component, we need to know the concentration first in terms of molality which is mol per mass of solution. Assuming the density of the solution is equal to that of water we would find:

molality = 0.160 mol KBr / L ( 1 L / 1 kg solution ) = 0.160 mol KBr / kg solution

mass KBr = 0.160 mol KBr / kg solution (.0750 kg solution ) ( 119 g KBr / mol KBr ) = 1.428 g KBr

mass solvent = 75 - 1.428 = 73.572 g water
8 0
3 years ago
What is the oxidation number of P in PF6^-
Hitman42 [59]
<span>F can only have oxidation number of -1
The overall compound has an oxidation number of -1
You have 6 Fs, so 6(-1) = -6
charge from F
 X = oxidation number of P
 x + (-6) = -1
solve for
x = +5</span>
5 0
2 years ago
Read 2 more answers
A gas occupies 210 mL at -73°C to have the same gas occupy 360 mL:
const2013 [10]

Answer:

a. The temperature should be increased.

b. 342.86K

Explanation:

Using Charles law equation as follows:

V1/T1 = V2/T2

Where;

V1 = initial volume (mL)

V2 = final volume (mL)

T1 = initial temperature (K)

T2 = final temperature (K)

According to this question, the following information were given:

V1 = 210mL

V2 = 360mL

T1 = -73°C (-73 + 273 = 200K)

T2 = ?

Using V1/T1 = V2/T2

210/200 = 360/T2

Cross multiply

200 × 360 = 210 × T2

72000 = 210T2

T2 = 72000/210

T2 (new temperature) = 342.86K

8 0
2 years ago
Look at the picture above. what method is used to separate the different parts of crude oil?
baherus [9]

Answer:

A very special way of separation called FRACTIONAL DISTILLATION will be used to separate various components from Crude oil.

Fractional distillation is the separation of a mixture into its component parts, or fractions. Chemical compounds are separated by heating them to a temperature at which one or more fractions of the mixture will vaporize. It uses distillation to fractionate.

4 0
2 years ago
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