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3 years ago

How would you find the mass of an object from its density and volume ?

Chemistry

1 answer:

Lina20 [59]3 years ago

7 0

Answer:

Mass= volume x density

Explanation:

Multiply the density by the volume.

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Which arrows represents the phase transitions in which he's energy is gained

ipn [44]

The correct answer would be the first option. The arrows 1, 2 and 3 represent the phase transitions where heat energy is gained. As heat energy is gained the kinetic energy of the molecules in a substance is increased which would cause them to change phases from solid to liquid and to gas.

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4 years ago

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A waterbed mattress has the following dimensions: 210 cm X 160 cm X 25 cm. The density of water is 62.4lb/ft3. What is the weigh

artcher [175]

Answer: The weight of water bed in pounds is 1850.16 lb

Explanation:

To calculate the volume of cuboid, we use the equation:

$V=lbh$

where,

V = volume of cuboid

l = length of cuboid = 210 cm

b = breadth of cuboid = 160 cm

h = height of cuboid = 25 cm

Putting values in above equation, we get:

$V=210\times 160\times 25=8.4\times 10^5cm^3=29.65ft^3$ (Conversion factor: $1cm^3=3.53\times 10^{-5}ft^3$ )

To calculate the mass of waterbed, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$

Density of waterbed = $62.4lb/ft^3$

Volume of waterbed = $29.65ft^3$

Putting values in above equation, we get:

$62.4lb/ft^3=\frac{\text{Mass of waterbed}}{29.65ft^3}\\\\\text{Mass of waterbed}=(62.4lb/ft^3\times 29.65ft^3)=1850.16lb$

Hence, the weight of water bed in pounds is 1850.16 lb

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4 years ago

CAN SOMEONE PLEASE HELP ME WITH THIS

klio [65]

me too please l need to know how to use this

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2 years ago

Is It shiny or dull?

marusya05 [52]

it is shiny and not dull

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3 years ago

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Use the data in the table above to calculate an approximate ΔH∘ in kilojoules for the synthesis of hydrazine from ammonia:

dmitriy555 [2]

On the left (reactant) side you have 6 N-H bonds and 1 Cl-Cl bond
On the right (product) side you have 4 N-H bonds, 1 N-N bond and 2 H-Cl bonds 

Add up the bond energies for each side (multiplying by the number of bonds) and calculate the difference for your ΔHº

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3 years ago