if a liter
of water is heated from 20oc to 50oc, what happens to its
volume?
at constant pressure it
volume increases as given by V1T2 =V2 T1
1 * 50 = V2 * 20
V2 = 2.5LITRES
chlorine boils
at 239 k THIS MEANS
at this point its vapor
pressure is equal to the atmospheric pressure
the density of aluminum
is 2.7 g/cm3. what is the volume of 5.0 g of aluminum?
density = mass/ volume
volume =
density * mass
= 2.7 * 5 = 13.5cm3
what is the sum
of 2.7 g and 2.47 g
2.7 + 2.47 = 5.17 g
the density of ethanol
is 0.789 g/cm3 at 20°c. what volume of ethanol has a mass of 15.5
grams?
density = mass/ volume
volume =
density * mass
=0.789 * 15.5 =12.2295cm3
what is the density
of an object having a mass of 4.0 g and a volume of 39.0
cubic centimeters?
density = mass/ volume
4.0/39 =0.1026g/cm3
if a liter of water is heated from 20oc to 50oc,
what happens to its volume?
the volume multiplies by 50/20= 2.5 times, the
new volume is 2.5 l
what is the
mass at 20°c of 5 liters of air
mass
=density * volume
density
of air is 1.225 kg/m3
therefore mass =1.223 * 5litres
what is the
volume in liters of a kilogram of ice at 0 c
volume = density * mass
at 0
celcius density of ice is 0.9998g/cm3
therefore 0.9998 * 1000(1kg)
=9.998cm3
an automobile can travel 40.0 miles on one gallon of gasoline. how many kilometers per
liter is this
a gallon is five litters , if
40
miles = 1 gallon
x miles
= 1/5 gallon
40/5=
8miles
and 8
miles = 8 * 1.60934 = answer in
kilometres
chlorine boils at 239 k. what is the boiling point of chlorine expressed in degrees
celsius?
273kelvin
= 0 celcius
239
kelvin will be
239 -273
=-34 celcius
which would be true if you went to the moon?
your
weight will be lost by 1/6 or yoyu will be lose your body mass by 6 times
the density of gold is 19.3 g/cm3. the volume of a
solid piece of gold is 2.50 cm3. find its mass.
mass=
density * volume
19.3 *
2.5 = 48.25 grams
what is the density
of an object having a mass of 8.0 g and a volume of 25 cm
density
= 8/25 g/cm3=0.32
what is the quantity
0.0075 meters expressed in centimeters?
0.75cm
what is the
temperature -34c expressed in kelvins
239kelvin
which state has never recorded a temperature above
100° f?
100
fahrenheit = 100celcius -32 = 68celcius
is 373
kelvin
239kelvin
what is the quantity of 987 milligrams expressed in grams
987/10 =
98.7 mg
if the
temperature changes by 100k by how much does it change in °c
it changes by 100°C
what is the measurement
111.009 mm rounded off to four significant digits?
IS 111
express the sum of 7.68 m and 5.0 m using the
correct number of significant figures
12.68
which temperature scale has no negative temperatures
KELVIN
how many
significant figures are in the measurement 40,500 mg?
3
what is the result
of multiplying 2.5 × 1010 by 3.5 × 10–2?
8.75= 108
the mass of the electron is 9.10939 x10-34
TRUE
OR FALSE
what is the temperature
128k expressed in degrees celsius
128-273
= -145 KELVIN
express 0.05 grams in kilograms
0.05 *
0.001 = 5 * 10-5 kg
what is
the volume of 80.0 g of ether if the density of ether is 0.70
g/ml
v=
density * mass
= 80 * 0.7 =56ml
find the number of kilometers in 92.25 miles
1 mile= 1.60934
km
92.25
miles =1.60934 * 92.25 =?
what is the
volume in cubic centimeters of a sample of gold that has a
mass of 0.715 kg
volume
=density * mass
=19.32 * 0.715 * 100 =?
if
this sample of gold is a cube what
is the length of each edge in centimeters
all have same lenght
if the temperature of a piece of steel decreases
what happens to its density
it
increases
23 heat transfer by conduction in metals occurs when
physical
contact
what is the volume of an object with a density
of 7.73 g/cm3 and a mass of 5.40 10 g
volumes = mass * density
5.4010 *
7.73=?
what happens to the volume of a 1 kg of water when
it is heated from 0oc to 2oc?
it turns
to liquid.
the accepted length is 200 cm and experimental value 198 cm—what is % error?
[200-198/198
]* 100
which has the greater
density a lake full of water or a cup full of lake water
a cup full of lake water
which is denser ice at 0 degrees or water at 4 celcius
water at
4 degree celcius
the equatorial radius of the earth is about 6370 km
true or false
smaller
283k on Kelvin scale
answer
this question
answer
this question
yes
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