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3 years ago

This is a material through which electricity can flow? A. Conductor B. Circuit C. Motor D. Resistor

Chemistry

1 answer:

Dvinal [7]3 years ago

4 0

The conductor rotates through a magnetic field to provide

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Wat substance cannot be separated physically or chemically?

Tresset [83]

Answer:

Anything that cannot be separated physically or chemically is an element.

5 0

3 years ago

Read 2 more answers

This is hard, isn't it? please help me though. PLEASE

Liono4ka [1.6K]

I think it might be A. i am not totally sure though

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3 years ago

How much hear must be obsorberd by 375.0 grams of water to raise its temperature from 10.0c to 35.0c? The specific heat capacity

inysia [295]

Answer:

The heat absorbed by water is 39243.75 J.

Explanation:

Given data:

Mass of water = 375.0 g

Heat absorbed by water= ?

Initial temperature = 10.0°C

Final temperature = 35.0 °C

The specific heat capacity of water = 4.186 j/g.°C

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = T2 - T1

ΔT = 35°C - 10°C

ΔT = 25°C

Q = m.c. ΔT

Q = 375.0 g× 4.186 j/g °C × 25°C

Q = 39243.75 J

The heat absorbed by water is 39243.75 J.

3 0

3 years ago

solution contains 174 grams of lithium bromide in 360 grams of water, what is the mole fraction of lithium bromide

Luba_88 [7]

Answer:

$\large\boxed{\large\boxed{0.091}}$

Explanation:

The mole fraction of a component in a mixture is the number of moles of the component divided by the total number of moles of all the components, multiplied by 100.

The symbol X is used to represent the mole fraction.

$X_A=\dfrac{\text{number of moles of component A}}{\text{number of moles of all the components}}\times 100$

1. Convert masses in grams to number of moles

Formula:

number of moles = mass in grams / molar mass

a) Lithium bromide

Chemical Formula: LiBr
Molar mass: 86.845 g/mol

$\text{Number of moles}=\dfrac{174g}{86.845g/mol}=2.00mol$

b) Water

Chemical formula: H₂O

Molar mass: 18.015 g/mol

$\text{Number of moles}=\dfrac{360g}{18.015g/mol}=19.98mol\approx 20.0mol$

c) Total number of moles = 2.00 mol + 20.0 mol = 22.0 mol

2. Mole fraction of lithium bromide

$\text{Mole fraction of lithium bromide}=\dfrac{2.00}{22.0}=0.091$

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3 years ago

he process by which plants and animals incorporate the NO3- and ammonia formed through nitrogen fixationand nitrification

ruslelena [56]

Transpiration I believe

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3 years ago