Question 1

How many significant figures are there in the answer to the following problem?
( 9)992 × 3.200)+ 0.610 = ?

Accepted Answer

The first two terms in the equation have 4 significant figures each (3 before the decimal point and 1 after), and the last term has 3 significant figures (1 before the decimal point and 2 after). When adding or subtracting numbers, the answer should have the same number of decimal places as the term with the least number of decimal places, which in this case is 2. Therefore, the final answer should have 4 significant figures and 2 decimal places, which is option D: 31.79.

Question 2

In a periodic table rows are called ________ and columns are called ________.

Accepted Answer

The answer of In a periodic table rows are called...

Question 3

If 1.4% of the mass of a human body is calcium,how many kilograms of calcium are there in a 185-pound man?

Accepted Answer

First, convert the man's weight from pounds to kilograms: 185 pounds * (1 kg / 2.20462 pounds) ≈ 83.9146 kg. Then, calculate the mass of calcium: 1.4% of 83.9146 kg = 0.014 * 83.9146 kg ≈ 1.2 kg.

Question 4

A fishing boat accidentally spills 3.0 barrels of diesel oil into the ocean.Each barrel contains 42 gallons.If the oil film on the ocean is 2.5 × 10² nm thick,how many square meters will the oil slick cover?

Accepted Answer

The answer of A fishing boat accidentally spills 3.0 barrels...

Question 5

Pb is the symbol for the element ________.

Accepted Answer

The answer of Pb is the symbol for the element...

Question 6

How many significant figures are there in the answer for the following problem?
56)4 + 0.8822 + 21 = ?

Accepted Answer

The number with the least decimal places (21) has zero decimal places, so the answer should be rounded to the nearest whole number, which gives two significant figures.

Question 7

Round off 00 907506 to four significant figures.

Accepted Answer

The answer of Round off 00 907506 to four significant...

Question 8

Because of the high heat and low humidity in the summer in Death Valley,California,a visitor requires about one quart of water for every two miles traveled on foot.Calculate the approximate number of liters required for a person to walk 10.kilometers in Death Valley.

Accepted Answer

1 quart is approximately 0.946 liters. For 10 kilometers (about 6.2 miles), a person would need about 3.1 quarts, which is approximately 2.9 liters.

Question 9

Calculate the kinetic energy of a 150-g baseball moving at a speed of 36.m/s ( 81 mph).

Accepted Answer

The kinetic energy (KE) is calculated using the formula KE = 0.5 * m * v^2. Here, m = 0.150 kg and v = 36 m/s. KE = 0.5 * 0.150 * (36)^2 = 97.2 J, which is approximately 9.7 × 10^1 J.

Question 10

An acetylene molecule contains 2 atoms of carbon.The number 2 represents how many significant figures?

Accepted Answer

The answer of An acetylene molecule contains 2 atoms of...

Question 11

A preliminary explanation of the results of many experiments that can be used to make predictions and suggest further experimentations is a ________.

Accepted Answer

The answer of A preliminary explanation of the results of...

Question 12

A mass of mercury occupies 0.950 L.What volume would an equal mass of ethanol occupy? The density of mercury is 13.546 g/mL and the density of ethanol is 0.789 g/mL.

Accepted Answer

To find the volume of ethanol, first calculate the mass of mercury using its density and volume, then use the mass and the density of ethanol to find the volume of ethanol. The mass of mercury is 0.950 L * 13.546 g/mL = 12,868.7 g. The volume of ethanol is 12,868.7 g / 0.789 g/mL = 16,313.8 mL = 16.3 L.

Question 13

The symbol for mercury is ________.

Accepted Answer

The answer of The symbol for mercury is ________....

Question 14

Which of the following numbers has the greatest number of significant figures?

Accepted Answer

0.5070 has four significant figures, which is more than the other options. Leading zeros are not counted, trailing zeros in a decimal are significant, and scientific notation directly indicates the number of significant figures.

Question 15

The factor 10S1U1P1-3S1S1P0 corresponds to which prefix?

Accepted Answer

The factor 10^1U1P1-3S1S1P0 represents a number that is equal to (10^1)×(10^1)×(10^-3)×(10^1)×(10^-3) which simplifies to 10. Therefore, this corresponds to the SI prefix "milli".

Question 16

How many of the following numbers contain 3 significant figures? 0)408 9.040 0.0 400 9.05 × 10²⁴

Accepted Answer

Remember that significant figures are the number of digits in a number that are reliable and meaningful. 
In order to determine how many numbers have 3 significant figures here we have to count the digits starting with the first non-zero digit. 
So,
408 has 3 significant figures
9.040 has 4 significant figures
0.0400 has 3 significant figures
9.05 × 10^11 has 3 significant figures
Therefore, there are 3 numbers with 3 significant figures: 408, 0.0400, and 9.05 × 10^11.

Question 17

Chemistry is the study of the composition,properties,and transformations of ________.

Accepted Answer

The answer of Chemistry is the study of the composition,properties,and...

Question 18

The element Se can be found in period ________ and group ________ of the periodic table.

Accepted Answer

The answer of The element Se can be found in...

Question 19

A piece of metal ore weighs 8.25 g.When a student places it into a graduated cylinder containing water,the liquid level rises from 21.25 mL to 26.47 mL.What is the density of the ore?

Accepted Answer

First, we need to calculate the volume of the metal ore using water displacement method.

Volume of metal ore = Final volume - Initial volume

= 26.47 mL - 21.25 mL

= 5.22 mL

Next, we can use the formula for density:

Density = Mass / Volume

Density = 8.25 g / 5.22 mL

Density = 1.58 g/mL

Therefore, the density of the metal ore is 1.58 g/mL. This matches with choice C.

Question 20

How many significant figures are there in the answer for the following problem?   = ?

Accepted Answer

The answer of How many significant figures are there in...

Quiz 1: Chemistry: Matter and Measurement

How many significant figures are there in the answer to the following problem? ( 9) 992 × 3.200) + 0.610 = ?

In a periodic table rows are called and columns are called .

If 1.4% of the mass of a human body is calcium,how many kilograms of calcium are there in a 185-pound man?

A fishing boat accidentally spills 3.0 barrels of diesel oil into the ocean.Each barrel contains 42 gallons.If the oil film on the ocean is 2.5 × 10² nm thick,how many square meters will the oil slick cover?

Pb is the symbol for the element ________.

How many significant figures are there in the answer for the following problem? 56) 4 + 0.8822 + 21 = ?

Round off 00 907506 to four significant figures.

Because of the high heat and low humidity in the summer in Death Valley,California,a visitor requires about one quart of water for every two miles traveled on foot.Calculate the approximate number of liters required for a person to walk 10.kilometers in Death Valley.

Calculate the kinetic energy of a 150-g baseball moving at a speed of 36.m/s ( 81 mph) .

An acetylene molecule contains 2 atoms of carbon.The number 2 represents how many significant figures?

A preliminary explanation of the results of many experiments that can be used to make predictions and suggest further experimentations is a ________.

A mass of mercury occupies 0.950 L.What volume would an equal mass of ethanol occupy? The density of mercury is 13.546 g/mL and the density of ethanol is 0.789 g/mL.

The symbol for mercury is ________.

Which of the following numbers has the greatest number of significant figures?

The factor 10^-3 corresponds to which prefix?

How many of the following numbers contain 3 significant figures? 0) 408 9.040 0.0 400 9.05 × 10²⁴

Chemistry is the study of the composition,properties,and transformations of ________.

The element Se can be found in period and group of the periodic table.

A piece of metal ore weighs 8.25 g.When a student places it into a graduated cylinder containing water,the liquid level rises from 21.25 mL to 26.47 mL.What is the density of the ore?

How many significant figures are there in the answer for the following problem? = ?

Quiz 1: Chemistry: Matter and Measurement

How many significant figures are there in the answer to the following problem? ( 9) 992 × 3.200) + 0.610 = ?

In a periodic table rows are called ________ and columns are called ________.

If 1.4% of the mass of a human body is calcium,how many kilograms of calcium are there in a 185-pound man?

A fishing boat accidentally spills 3.0 barrels of diesel oil into the ocean.Each barrel contains 42 gallons.If the oil film on the ocean is 2.5 × 102 nm thick,how many square meters will the oil slick cover?

Pb is the symbol for the element ________.

How many significant figures are there in the answer for the following problem? 56) 4 + 0.8822 + 21 = ?

Round off 00 907506 to four significant figures.

Because of the high heat and low humidity in the summer in Death Valley,California,a visitor requires about one quart of water for every two miles traveled on foot.Calculate the approximate number of liters required for a person to walk 10.kilometers in Death Valley.

Calculate the kinetic energy of a 150-g baseball moving at a speed of 36.m/s ( 81 mph) .

An acetylene molecule contains 2 atoms of carbon.The number 2 represents how many significant figures?

A preliminary explanation of the results of many experiments that can be used to make predictions and suggest further experimentations is a ________.

A mass of mercury occupies 0.950 L.What volume would an equal mass of ethanol occupy? The density of mercury is 13.546 g/mL and the density of ethanol is 0.789 g/mL.

The symbol for mercury is ________.

Which of the following numbers has the greatest number of significant figures?

The factor 10-3 corresponds to which prefix?

How many of the following numbers contain 3 significant figures? 0) 408 9.040 0.0 400 9.05 × 1024

Chemistry is the study of the composition,properties,and transformations of ________.

The element Se can be found in period ________ and group ________ of the periodic table.

A piece of metal ore weighs 8.25 g.When a student places it into a graduated cylinder containing water,the liquid level rises from 21.25 mL to 26.47 mL.What is the density of the ore?

How many significant figures are there in the answer for the following problem? = ?

In a periodic table rows are called and columns are called .

A fishing boat accidentally spills 3.0 barrels of diesel oil into the ocean.Each barrel contains 42 gallons.If the oil film on the ocean is 2.5 × 10² nm thick,how many square meters will the oil slick cover?

The factor 10^-3 corresponds to which prefix?

How many of the following numbers contain 3 significant figures? 0) 408 9.040 0.0 400 9.05 × 10²⁴

The element Se can be found in period and group of the periodic table.