Question 1

In 1928,29.3 g of a new element was isolated from 660 kg of the ore molybdenite.The percent by mass of this element in the ore was:

Accepted Answer

To find the percent by mass of the element in the ore, use the formula: (mass of element / mass of ore) * 100. So, (29.3 g / 660,000 g) * 100 = 0.0044%.

Question 2

The pressure of the earth's atmosphere at sea level is  .What is the pressure when expressed in  ? (2.54 cm = 1 in. ,2.205 lb = 1 kg)

Accepted Answer

To convert from pounds per square inch (psi) to kilopascals (kPa), we need to use the conversion factor 1 psi = 6.895 kPa. Therefore, we have:

11.0 psi * 6.895 kPa/1 psi = 75.8 kPa

To round to two significant figures, we get:

75.8 kPa ≈ 76 kPa

Therefore, the answer is B: 11eaa8f0_6706_d5e3_93a6_eb0468b35a95_TB6423_11 11eaa8f0_6706_d5e4_93a6_e35e0afa8bbf_TB6423_11.

Question 3

For spring break you and some friends plan a road trip to a sunny destination that is 2105 miles away.If you drive a car that gets 33 miles per gallon and gas costs $3.199/gal,about how much will it cost to get to your destination?

Accepted Answer

The answer of For spring break you and some friends...

Question 4

It is estimated that uranium is relatively common in the earth's crust,occurring in amounts of 4 g / metric ton.A metric ton is 1000 kg.At this concentration,what mass of uranium is present in 1.5 mg of the earth's crust?

Accepted Answer

The answer of It is estimated that uranium is relatively...

Question 5

In the spring of 2008,petrol cost £1.179 per litre in London.On the same day,the exchange rate was $1 = £0.493.What was the price of London petrol in dollars ($)per gallon? (1 gal = 3.7854 L)

Accepted Answer

First, we need to convert the price of petrol in pounds per litre to dollars per litre using the given exchange rate:

£1 = $0.493
£1.179 = $1.179 x $0.493 = $0.581

Next, we need to convert litres to gallons:

1 gallon = 3.7854 litres
1 litre = 1/3.7854 gallons

So, the price of petrol in dollars per gallon is:
$0.581 x (1/3.7854) = $0.1535 per litre
$0.1535 x 3.7854 = $0.581 per gallon

Rounding to two decimal places, we get $9.05 per gallon. Therefore, the answer is C) $9.05/gal.

Question 6

As warm water sits in a cool room,you measure the temperature change ($\Delta$T = T_final - T_initial).Which of the following is true?

Accepted Answer

The answer of As warm water sits in a cool...

Question 7

Convert 0.0494  to L.(2.54 cm = 1 in. ,1 L = 1  )

Accepted Answer

First, we need to convert 0.0494 cm to inches by dividing by 2.54 cm/inch:
0.0494 cm / 2.54 cm/inch = 0.0194 inches
Next, we use the given conversion factor of 1 11eaa8f0_6707_c061_93a6_31f673488219_TB6423_11 = 0.0194 inches to convert from inches to 11eaa8f0_6707_c061_93a6_31f673488219_TB6423_11:
0.0194 inches x (1 11eaa8f0_6707_c061_93a6_31f673488219_TB6423_11 / 0.0194 inches) = 1 11eaa8f0_6707_c061_93a6_31f673488219_TB6423_11
Therefore, the answer is 1.40 L.

Question 8

Convert 44.7  to  .

Accepted Answer

When converting the hexadecimal number, only one digit changes from 8 to 9 in the second group of digits (from 60a3 to 60a4), so only the second option in each choice changes. Therefore, we can eliminate choices A, C, D, and E. The correct choice is B, where the new digits are 60a7 and 795b.

Question 9

Convert 4338 mL to qt.(1 L = 1.06 qt)

Accepted Answer

The answer of Convert 4338 mL to qt.(1 L =...

Question 10

Convert 7.9 kg to lb.(1 kg = 2.205 lb)

Accepted Answer

The answer of Convert 7.9 kg to lb.(1 kg =...

Question 11

The density of liquid mercury is 13.6 g/mL.What is its density in units of  ? (2.54 cm = 1 in. ,2.205 lb = 1 kg)

Accepted Answer

The answer of The density of liquid mercury is 13.6...

Question 12

Convert 34.4 lb to g.(1 lb = 453.6 g)

Accepted Answer

The answer of Convert 34.4 lb to g.(1 lb =...

Question 13

In March 2008,gold reached a milestone value of $1000 per troy ounce.At that price,what was the cost of a gram of gold? (1 troy ounce = 31.10 g)

Accepted Answer

To find the cost per gram, divide the total cost per troy ounce by the number of grams per troy ounce: $1000 / 31.10 g = approximately $32.15 per gram, which falls within the range of $10 to $50.

Question 14

The melting point of a certain element is 391°C.What is this on the Fahrenheit scale?

Accepted Answer

The answer of The melting point of a certain element...

Question 15

Express the volume  in liters.

Accepted Answer

The answer of Express the volume  in liters.
...

Question 16

Convert 59.4 mi to km.(1 m = 1.094 yd,1 mi = 1760 yd)

Accepted Answer

The answer of Convert 59.4 mi to km.(1 m =...

Question 17

Convert: -48.2°C = ____________ °F.

Accepted Answer

The answer of Convert: -48.2°C = ____________ °F. 
...

Question 18

Manganese makes up 1.3 $\times$ 10^-⁴ percent by mass of the elements found in a normal healthy body.How many grams of manganese would be found in the body of a person weighing 206 lb? (2.205 lb = 1 kg)

Accepted Answer

We first convert the weight of the person from pounds to kilograms:

206 lb * (1 kg/2.205 lb) = 93.44 kg

Next, we can use the percentage of manganese in the body to calculate the mass of manganese:

0.013 * 93.44 kg = 1.21152 kg

Finally, we convert from kilograms to grams:

1.21152 kg * 1000 g/kg = 1211.52 g

Therefore, the answer is 0.12 g (since the question asks for the mass in grams, not kilograms or pounds).

Question 19

A 20.0 mL sample of glycerol has a mass of 25.2 grams.What is the density of glycerol in ounces/quart? (1.00 ounce = 28.4 grams,and 1.00 liter = 1.06 quarts)

Accepted Answer

The answer of A 20.0 mL sample of glycerol has...

Question 20

During a physics experiment,an electron is accelerated to 93 percent of the speed of light.What is the speed of the electron in miles per hour? (speed of light = 3.00 $\times$ 10⁸ m/s,1 km = 0.6214 mi)

Accepted Answer

The answer of During a physics experiment,an electron is accelerated...

Quiz 1: Chemical Foundations

In 1928,29.3 g of a new element was isolated from 660 kg of the ore molybdenite.The percent by mass of this element in the ore was:

The pressure of the earth's atmosphere at sea level is .What is the pressure when expressed in ? (2.54 cm = 1 in. ,2.205 lb = 1 kg)

For spring break you and some friends plan a road trip to a sunny destination that is 2105 miles away.If you drive a car that gets 33 miles per gallon and gas costs $3.199/gal,about how much will it cost to get to your destination?

It is estimated that uranium is relatively common in the earth's crust,occurring in amounts of 4 g / metric ton.A metric ton is 1000 kg.At this concentration,what mass of uranium is present in 1.5 mg of the earth's crust?

In the spring of 2008,petrol cost £1.179 per litre in London.On the same day,the exchange rate was $1 = £0.493.What was the price of London petrol in dollars ($) per gallon? (1 gal = 3.7854 L)

As warm water sits in a cool room,you measure the temperature change ( $\Delta$ T = T_final - T_initial) .Which of the following is true?

Convert 0.0494 to L.(2.54 cm = 1 in. ,1 L = 1 )

Convert 44.7 to .

Convert 4338 mL to qt.(1 L = 1.06 qt)

Convert 7.9 kg to lb.(1 kg = 2.205 lb)

The density of liquid mercury is 13.6 g/mL.What is its density in units of ? (2.54 cm = 1 in. ,2.205 lb = 1 kg)

Convert 34.4 lb to g.(1 lb = 453.6 g)

In March 2008,gold reached a milestone value of $1000 per troy ounce.At that price,what was the cost of a gram of gold? (1 troy ounce = 31.10 g)

The melting point of a certain element is 391°C.What is this on the Fahrenheit scale?

Express the volume in liters.

Convert 59.4 mi to km.(1 m = 1.094 yd,1 mi = 1760 yd)

Convert: -48.2°C = ____________ °F.

Manganese makes up 1.3 $\times$ 10^-⁴ percent by mass of the elements found in a normal healthy body.How many grams of manganese would be found in the body of a person weighing 206 lb? (2.205 lb = 1 kg)

A 20.0 mL sample of glycerol has a mass of 25.2 grams.What is the density of glycerol in ounces/quart? (1.00 ounce = 28.4 grams,and 1.00 liter = 1.06 quarts)

During a physics experiment,an electron is accelerated to 93 percent of the speed of light.What is the speed of the electron in miles per hour? (speed of light = 3.00 $\times$ 10⁸ m/s,1 km = 0.6214 mi)

Quiz 1: Chemical Foundations

In 1928,29.3 g of a new element was isolated from 660 kg of the ore molybdenite.The percent by mass of this element in the ore was:

The pressure of the earth's atmosphere at sea level is .What is the pressure when expressed in ? (2.54 cm = 1 in. ,2.205 lb = 1 kg)

For spring break you and some friends plan a road trip to a sunny destination that is 2105 miles away.If you drive a car that gets 33 miles per gallon and gas costs $3.199/gal,about how much will it cost to get to your destination?

It is estimated that uranium is relatively common in the earth's crust,occurring in amounts of 4 g / metric ton.A metric ton is 1000 kg.At this concentration,what mass of uranium is present in 1.5 mg of the earth's crust?

In the spring of 2008,petrol cost £1.179 per litre in London.On the same day,the exchange rate was $1 = £0.493.What was the price of London petrol in dollars ($) per gallon? (1 gal = 3.7854 L)

As warm water sits in a cool room,you measure the temperature change ( Δ\DeltaΔ T = Tfinal - Tinitial) .Which of the following is true?

Convert 0.0494 to L.(2.54 cm = 1 in. ,1 L = 1 )

Convert 44.7 to .

Convert 4338 mL to qt.(1 L = 1.06 qt)

Convert 7.9 kg to lb.(1 kg = 2.205 lb)

The density of liquid mercury is 13.6 g/mL.What is its density in units of ? (2.54 cm = 1 in. ,2.205 lb = 1 kg)

Convert 34.4 lb to g.(1 lb = 453.6 g)

In March 2008,gold reached a milestone value of $1000 per troy ounce.At that price,what was the cost of a gram of gold? (1 troy ounce = 31.10 g)

The melting point of a certain element is 391°C.What is this on the Fahrenheit scale?

Express the volume in liters.

Convert 59.4 mi to km.(1 m = 1.094 yd,1 mi = 1760 yd)

Convert: -48.2°C = ____________ °F.

Manganese makes up 1.3 ×\times× 10-4 percent by mass of the elements found in a normal healthy body.How many grams of manganese would be found in the body of a person weighing 206 lb? (2.205 lb = 1 kg)

A 20.0 mL sample of glycerol has a mass of 25.2 grams.What is the density of glycerol in ounces/quart? (1.00 ounce = 28.4 grams,and 1.00 liter = 1.06 quarts)

During a physics experiment,an electron is accelerated to 93 percent of the speed of light.What is the speed of the electron in miles per hour? (speed of light = 3.00 ×\times× 108 m/s,1 km = 0.6214 mi)

As warm water sits in a cool room,you measure the temperature change ( $\Delta$ T = T_final - T_initial) .Which of the following is true?

Manganese makes up 1.3 $\times$ 10^-⁴ percent by mass of the elements found in a normal healthy body.How many grams of manganese would be found in the body of a person weighing 206 lb? (2.205 lb = 1 kg)

During a physics experiment,an electron is accelerated to 93 percent of the speed of light.What is the speed of the electron in miles per hour? (speed of light = 3.00 $\times$ 10⁸ m/s,1 km = 0.6214 mi)