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goblinko [34]
3 years ago
5

The mass of an object is described in

Chemistry
1 answer:
Ksenya-84 [330]3 years ago
4 0

Answer:

D.

The mass of an object is described in grams

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The best solution for the problem of pollution by man-made technologies A. cannot involve anyone who is not a technology expert
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Answer:

is likely to come from collaborative efforts by technology experts and experts on pollution.

Explanation:

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3 years ago
Convert 121 Cal to kilowatt-hours
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calculate how many milliliters of 0.142 M NaOH are needed to completely neutralize 21.4 mL of 0.294 M H2C4H4O6.
Flura [38]

Answer:

The answer to your question is 88.7 ml

Explanation:

Data

Volume = ?

Concentration of NaOH = 0.142 M

Volume of H₂C₄H₄O₆ = 21.4 ml

Concentration of H₂C₄H₄O₆ = 0.294 M

Balanced chemical reaction

               2 NaOH + H₂C₄H₄O₆  ⇒  Na₂C₄H₄O₆  +  2H₂O

1.- Calculate the moles of H₂C₄H₄O₆

Molarity = moles/volume

Solve for moles

moles = Molarity x volume

Substitution

moles = 0.294 x 21.4/1000

Result

moles = 0.0063

2.- Use proportions to calculate the moles of NaOH

              2 moles of NaOH ------------------ 1 moles of H₂C₄H₄O₆

               x                           ------------------ 0.0063 moles

               x = (0.0063 x 2) / 1

               x = 0.0126 moles of NaOH

3.- Calculate the volume  of NaOH

Molarity = moles / volume

Solve for volume

Volume = moles/Molarity

Substitution

Volume = 0.0126/0.142

Result

Volume = 0.088 L or 88.7 ml

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3 years ago
How many formula units are contained in 2.35mol of Iron (III) Oxide
konstantin123 [22]
Remember, 1 mole= 6.022x10^23 atoms, molecules, or formula units.

Answer is 1.42x10^24

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3 years ago
How many carbon atoms are in 15.0 grams of sucrose (C12H22O11)
dusya [7]
Answer: 15.3 carbon atoms
4 0
3 years ago
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