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3 years ago

13

n ideal gas is stored in a container at constant volume. If the temperature (T) were increased to 3T, what would be the change i

n pressure (P)?

1 answer:

Ber [7]3 years ago

7 0

Pressure is proportional to absolute temperature of a gas
if temperature is 3T the pressure will be the same value, 3P

[3P]

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In one meter there are how many milimeters?

Anastasy [175]

In one meter, there is 10000 milimeters. Just multiply however many meters you have by 10000, and youll have your answer.
~Silver

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3 years ago

3.5g of a Certain compound X, known to be made of carbon, hydrogen, and perhaps oxygen, and to have a molecular molar mass of 15

shutvik [7]

Answer:

C₅H₁₀O₅

Explanation:

1. Calculate the mass of each element in 2.78 mg of X.

(a) Mass of C

$\text{Mass of C} = \text{5.13 g CO}_{2}\times \dfrac{\text{12.01 g C}}{\text{44.01 g }\text{CO}_{2}}= \text{1.400 g C}$

(b) Mass of H

$\text{Mass of H} = \text{2.10 g H$_{2}$O}\times \dfrac{\text{2.016 g H}}{\text{18.02 g H$_{2}$O}} = \text{0.2349 g H}$

(c) Mass of O

Mass of O = 3.5 - 1.400 - 0.2349 = 1.87 g

2. Calculate the moles of each element

$\text{Moles of C = 1400 mg C}\times\dfrac{\text{1 mmol C}}{\text{12.01 mg C }} = \text{116.6 mmol C}\\\\\text{Moles of H = 234.9 mg H} \times \dfrac{\text{1 mmol H}}{\text{1.008 mg H}} = \text{233.1 mmol H}\\\\\text{Moles of O = 1870 mg O} \times \dfrac{\text{1 mmol O}}{\text{16.00 mg O}} = \text{116 mmol O}$

3. Calculate the molar ratios

Divide all moles by the smallest number of moles.

$\text{C: } \dfrac{116.6}{116.6}= 1\\\\\text{H: } \dfrac{233.1}{116.6} = 1.999\\\\\text{O: } \dfrac{116}{116.6} = 1.00$

4. Round the ratios to the nearest integer

C:H:O = 1:2:1

5. Write the empirical formula

The empirical formula is CH₂O.

6. Calculate the molecular formula.

EF Mass = (12.01 + 2.016 + 16.00) u = 30.03 u

The molecular formula is an integral multiple of the empirical formula.

MF = (EF)ₙ

$n = \dfrac{\text{MF Mass}}{\text{EF Mass }} = \dfrac{\text{150 u}}{\text{30.03 u}} = 5.00 \approx 5$

MF = (CH₂O)₅ = C₅H₁₀O₅

The molecular formula of X is C₅H₁₀O₅.

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4 years ago

Which characteristic do all owl families share? A.) small eyes B.) large body size C.) nighttime hunting D.) heart-shaped faces

Bond [772]

Answer:

all owl families have nighttime hunting

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2 years ago

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Which scientist is credited with developing the first scientific atomic theory

Dvinal [7]

Dalton

Dalton's theory was the first scientific theory because it relied on scientific investigative processes.

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3 years ago

How much time does it take for a truck to slow down if its acceleration is -15m/s2 and the change in velocity is -30m/s

damaskus [11]

Answer:

2s

Explanation:

Given parameters:

Acceleration of the truck = 15m/s²

change in Velocity = 30m/s

Unknown:

Time taken for the body to slow down = ?

Solution:

Acceleration is the rate of change of velocity ;

Acceleration = $\frac{change in velocity}{time}$

time = $\frac{change in velocity }{acceleration}$

Now insert the parameters and solve;

time = $\frac{30}{15}$ = 2s

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3 years ago