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-Dominant- [34]
2 years ago
9

The student recorded the mass of the cup + sample incorrectly and started with 2.20 g of hydrated compound but used 2.00 g in th

e calculations. Explain how this error will affect the calculation for the number of moles of water in the hydrate? Will the final answer be artificially high or low? How do you know?
Chemistry
1 answer:
gtnhenbr [62]2 years ago
4 0

Answer:

low

Explanation:

We were informed in the question that the student had incorrectly recorded the mass of cup + sample as 2.20 g but inadvertently used 2.00 g in the calculations.

This error will cause a slight decrease in the mass of water and ultimately decrease the number of moles of water in the hydrate.

What i am saying is that the number of moles of water obtained in the calculation will be artificially low.

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Indicate whether aqueous solutions of each of the following solutes will contain only ions, only molecules, or mostly molecules
Zanzabum

Answer:

Following are the solution to the given points:

Explanation:

In point a, the answer is only ions because of NH_4Cl has a strong electrolyte.

In point b, the answer is the only molecules because of ethanol CH_3CH_2OH, it has a nonelectrolyte.

In point c, the answer is the few ions because of hydrocyanic acid HCN, which has a weak electrolyte.

6 0
3 years ago
If one were asked to choose between paper or plastic which would be chosen and which one would benefit the environment?
vekshin1
It would be plastic Becaus we can recreate things with plastic and other things that are recyclable. Since,we mostly cut down trees everyday for paper,not knowing that we are wasting natural resources, and destroying animal homes and food.
6 0
3 years ago
If 16.5g of c6h14o2 are reacted vwith .499 mol of o2. How many moles of co2 should be produced
Fed [463]

Answer:

moles of carbon dioxide produced are 410.9 mol.

Explanation:

Given data:

Mass of C₆H₁₄O₂ = 16.5 g

Moles of O₂ = 499 mol

Moles of CO₂ = ?

First of all we will write the balance chemical equation.

2C₆H₁₄O₂  +  17O₂  →   14CO₂  +  12H₂O

moles of C₆H₁₄O₂  = mass × molar mass

moles of C₆H₁₄O₂ =  16.5 g × 118 g/mol

moles of C₆H₁₄O₂ = 1947 mol

Now we compare the moles of CO₂ with moles of O₂ and C₆H₁₄O₂ from balance chemical equation.

                 O₂      :     CO₂

                 17       :      14

                499     :      14/17× 499 = 410.9 moles

          C₆H₁₄O₂   :   CO₂

                    2    :      14

                 1947 :     14/2× 1947 =  13629 moles

Oxygen will be limiting reactant so moles of carbon dioxide produced are 410.9 mol.

5 0
3 years ago
Read 2 more answers
Sarah lives in a house at the bottom of a hill. Every time it rains, water collects next to her house. Which of the following is
mrs_skeptik [129]

Answer:

d

Explanation:

the rainwater is not infiltrating into the ground.

4 0
3 years ago
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What is the mass (in kg) of 2.16 • 10^24 atoms of lead?
KiRa [710]

Answer:

0.783 kg

Explanation:

You must make the conversions:

atoms of Pb ⟶ moles of Pb ⟶ grams of Pb ⟶ moles of Pb

\text{Moles of Pb} = 2.16 \times 10^{24} \text{ atoms Pb} \times \frac{\text{1 mol Pb} }{ 6.022 \times 10^{23} \text{ atoms Pb} } = \text{3.589 mol Pb} \\

\text{Mass of S} = \text{3.589 mol Pb} \times \frac{\text{207.2 g Pb}}{\text{1 mol Pb} } = \text{743 g Pb = 0.783 kg Pb} \\


8 0
3 years ago
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