Ch1

°F to °C

(°F-32)/1.8

What temperature is 77 K when converted to degrees Celsius?

-196C

Ammonia boils at -33.4C. What temperature is this in F?

-28.1 F

At what temperature does the numerical reading on a Fahrenheit thermometer equal that on a Celsius thermometer?

-40F Explanation: since the temperature reading is the same so that mean °F = °C ? F = [°C × 9/5 ] + 32 °F Let temperature = t t = [t × 9/5 ] + 32 °F t - 9/5 t = 32 °F -4/5 t = 32 °F t = - 40 °F = -40 °C

is the freezing point of water = 273 °K = 32 °F

0 °C

The diameter of an atom is approximately 1 x 10-7 mm. What is this diameter when expressed in nanometers?

1 x10-1 nm

There are three temperature scales, their units are

1) Degrees Celsius °C 2) Degrees Fahrenheit °F 3) Kelvin °K

is the boiling point of water = 373 °K = 212 °F

100 °C

Deci

10^-1

Pico

10^-12

Femto

10^-15

atto

10^-18

centi

10^-2

milli

10^-3

micro

10^-6

nano

10^-9

Tera

10^12 (trillion)

The SI prefixes Tara and nano represent, respectively:

10^12 and 10^-9

Peta

10^15 (P)

kilo

10^3 (1000)

mega

10^6 (1,000,000)

Giga

10^9 (billion)

The SI prefix giga and micro represented by

10^9 and 10^-6

The SI prefixes giga and micro represent, respectively

10^9 and 10^-6.

1 pico meter =_____________centimeter

1x10^-12+2=10^-10

1 nanometer=____________picometers

1x10^-9+12=1000

1 kilogram =_____________miligrams

1x10^3+3=10^6

How many cubic centimeters are there in exactly one cubic meter?

1x10^6 cm3

How many meters in 2.3 nm?

2.3 x 10^-9

How many mm in 2.3 m?

2.3 x 10^3

Convert -77F to kalvin ?

212.6K

Choose the smallest value of the following a-0.1 kg b-200 g c-2X 10-3 μg

2X 10-3 μg

What temperature is 37 °C when converted to kelvin.

310.15

The freezing point of water at 1 atm pressure is...

32 °F

What temperature is 95 °F when converted to degrees Celsius?

35c

The number 0.0005678 expressed in scientific notation is:

5.678 x 10-4 Explanation: Since this number is less than one star moving the decimal point to the right until there is ONE non- zero number to the left of the decimal point. Write the rest of the number as is. Write the exponent as the number of places the decimal point was moved.

Express 500 cm into GM

500x10^-2-9

6.0 km is how many micrometers?

6.0x10^9 μm

Express 7.5 ng as Tg

7.5 x 10^-21 Tg

Iron has a density of 7.9 g/cm3. What is the mass of a cube of iron with the length of one side equal to 55.0 mm? a-2.1×104 g b-4.3×102 g c-1.3×103 g d-1.4g

7.9 g/cm3 × 166.375 cm3

Express 75 Tg as pg

75 X1024 pg

80 °F is equivalent to......

80-32/1.8= 26.67 °C

Which of these quantities represents the smallest mass? A)2.0 x 102 mg B) 0.0010 kg C) 1x10^5ug D)2.0 x 10^ 2 cg

A)2.0 x 102 mg B) 0.0010 kg C) 1x10^5ug✅ D)2.0 x 10^ 2 cg

The S I unit of electric current is

Ampere

K - 273.15°

C =

Which of the following SI base units is not commonly used in chemistry?

Candela

is the amount of matter in agiven amount of space

Density (d) :

If the temperature is 25°C, what is the temperature in Fahrenheit

F=(1.8xc)+32 =77F

A temperature of ________° K is the same as 63 °F.

First 63-32/1.8=17.22c Second k=c+273.15=290k

unitofdensity for solid

G/Cubic centimeter

unitofdensity For gases

G/l

unitofdensity for liquid

G/ml

What is the density of a piece of wood that has a mass of 20 g and a volume of 2 cm3? a-9.45 g/cm3 b-10.00 g/cm3 c-19.45 g/cm3 d-40.00 g/cm3

H

°C + 273.15°

K =

is the SI Base Unit of Temperature

Kelvin

SI unit of temperature

Kelvin (K)

Which of the following prefixes means 1000?

Kilo

What is the abbreviation for the prefix mega

M

Density is equals to

Mass divided by volume

Which of the following is length si unit

Meter

The following prefix 10^-3 means

Milli

Which of the following prefixes means 1/1000?

Milli

SI derived unit of pressure

Pascal

The SI base unit of time is the

Second

The SI unit of time is the

Second

Density of gases are

Very low

Which of these quantities represents the largest mass? a) 2.0 x10^2 mg b) 0.0010 kg c) 1.0 x10^5 ug d) 2.0 x 10^2 cg

a) 2.0 x10^2 mg b) 0.0010 kg c) 1.0 x10^5 ug d) 2.0 x 10^2 cg✅

Which of the following is the smallest distance? a) 21m b) 2.1 x 102 cm c) 21 mm d) 2.1 x 104 pm

a) 21m b) 2.1 x 102 cm c) 21 mm d) 2.1 x 104 pm✅ Explanation: Even though 2.1 x 104 is the largest number in this question, the units of pm (picometers) are the smallest units here, making it the smallest distance

Which of the following is not an SI base unit? a) Kilometer b) Kilogram c) Second d) Kelvin

a) Kilometer ✅ b) Kilogram c) Second d) Kelvin

4) Choose the largest value of the following a-0.1 kg b-200 g c-2X 10-3 μg d-3 X 109 ng

a- 0.1 kg × 103 = 100 g b- 200 g ✅ c- 2 × 10-3 μg × 10-6 = 2 × 10-9 g d- 3 × 10-9 ng × 109 = 3 g

All of the following is considered an si base unit except

a-Kg. b-meter c-second ((D-celsius ))

The SI unit of volume is

cubic meter

Which of the following is not SI base unit?

gram

SI derived unit for density

kg/m^3

Density decreases with

temperature

[ 1.8 × °C] + 32°

°F =