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The molar mass of an insecticide, dibromoethane, is 187.9. …

The molar mass of an insecticide, dibromoethane, is 187.9.  Its molecular formula is C2H4Br2.  How many atoms of carbon are in a sample of dibromoethane weighing [m] g?

Published September 3, 2024
Categorized as Uncategorized

When 19.8 g C2H6 and [m] g O2 react to form CO2 and H2O, how…

When 19.8 g C2H6 and [m] g O2 react to form CO2 and H2O, how many grams of water are formed? Make sure you balance the equation first.  C2H6  +  O2  →  CO2  + H20

Published September 3, 2024
Categorized as Uncategorized

A sample of an element with a mass of [m] g was dropped in a…

A sample of an element with a mass of [m] g was dropped in a graduated cylinder containing 22.30 mL water.  The volume of the water plus the sample was [v] mL.  What is the density of the element?

Published September 3, 2024
Categorized as Uncategorized

A scientist obtains the number 0.045006700 on a calculator….

A scientist obtains the number 0.045006700 on a calculator. If this number actually has four (4) significant figures, how should it be written?

Published September 3, 2024
Categorized as Uncategorized

As part of the calibration of a new laboratory balance, a 1….

As part of the calibration of a new laboratory balance, a 1.000-g mass is weighed with the following results: Trial …. Mass 1 ……… 1.201 ± 0.001 2 ………..1.202 ± 0.001 3 ………..1.200 ± 0.001            The balance is:

Published September 3, 2024
Categorized as Uncategorized

Which of the following hormones is primarily responsible for…

Which of the following hormones is primarily responsible for increasing glucose availability during prolonged exercise?

Published September 3, 2024
Categorized as Uncategorized

A [m]-g sample of HF is dissolved in water to give [v] mL of…

A [m]-g sample of HF is dissolved in water to give [v] mL of solution.  The concentration of the solution is: (answer in molarity)

Published September 3, 2024
Categorized as Uncategorized

In what manner does the body primarily utilize protein durin…

In what manner does the body primarily utilize protein during exercise?

Published September 3, 2024
Categorized as Uncategorized

The density of liquid chloroform is [d] g/mL. What is its de…

The density of liquid chloroform is [d] g/mL. What is its density in units of  lb/in3? (2.54 cm = 1 in., 2.205 lb = 1 kg)

Published September 3, 2024
Categorized as Uncategorized

What is the main end product of anaerobic glycolysis?

What is the main end product of anaerobic glycolysis?

Published September 3, 2024
Categorized as Uncategorized

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