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2 years ago

What is the temperature change the H2O sample

Chemistry

2 answers:

madreJ [45]2 years ago

7 0

Answer:

5.0 °C

Explanation:

To find the temperature change, you need to use the following equation:

Q = mcΔT

In this equation,

-----> Q = heat energy (J)

-----> m = mass (g)

-----> c = specific heat capacity (J/g°C)

-----> ΔT = temperature change (°C)

You can find the temperature change by plugging the given values into the equation and simplifying.

Q = 209 J c = 4.18 J/g°C

m = 10.0 g ΔT = ? °C

Q = mcΔT <----- Equation

209 J = (10.0 g)(4.18 J/g°C)ΔT <----- Insert values

209 J = (41.8)ΔT <----- Multiply 10.0 and 4.18

5.0 = ΔT <----- Divide both sides by 41.8

ki77a [65]2 years ago

4 0

Answer:

5° C temp change

Explanation:

Q = m c T

Given: Q =209 m = 10 c = 4.18 looking for T (change in temp)

209 = 10 * 4.18 T

T = 209 / (10*4.18) = 5° C

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The relative molecular mass of the gas : 64 g/mol

<h3>Further explanation</h3>

Given

Helium rate = 4x an unknown gas

Required

The relative molecular mass of the gas

Solution

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r₂ = unknown gas rate

M₁= relative molecular mass of Helium = 4 g/mol

M₂ = relative molecular mass of the gas

Input the value :

$\tt \dfrac{4r_2}{r_2}=\sqrt{\dfrac{M_2}{4} }\\\\16=\dfrac{M_2}{4}\\\\M_2=64~g/mol$

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an unknown molecule is found to consist of 24.2% carbon by mass, 4.0% hydrogen by mass and the remaining mass is due to chlorine

Paha777 [63]

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