3 years ago

Rb2SO4 is the formula for

Chemistry

2 answers:

RSB [31]3 years ago

5 0

Answer:

Rubidium sulfate

Explanation:

konstantin123 [22]3 years ago

3 0

Answer:

Rubidium sulfate !! Hope this helps <3

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When the pressure that a gas exerts on a sealed container changes from 22.5 psi to ? psi, the temperature changes from 110 degre

natta225 [31]

Using Gay-Lussac's Law, pressure is proportional to (absolute) temperature in Kelvin. We first convert the temperature values to Kelvin: 110 C = 383.15 K, while 65 C = 338.15 K.
P1/T1 = P2/T2
22.5/383.15 = P2/338.15
P2 = 19.9 psi

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3 years ago

How much heat is released when 75 g of octane is burned completely if the enthalpy of combustion is -5,500 kJ/mol CsH18? C8H18 +

aalyn [17]

Answer : The correct option is, (D) 3600 kJ

Explanation :

Mass of octane = 75 g

Molar mass of octane = 114.23 g/mole

Enthalpy of combustion = -5500 kJ/mol

First we have to calculate the moles of octane.

$\text{ Moles of octane}=\frac{\text{ Mass of octane}}{\text{ Molar mass of octane}}=\frac{75g}{114.23g/mole}=0.656moles$

Now we have to calculate the heat released in the reaction.

As, 1 mole of octane released heat = -5500 kJ

So, 0.656 mole of octane released heat = 0.656 × (-5500 kJ)

= -3608 kJ

≈ -3600 kJ

Therefore, the heat released in the reaction is 3600 kJ

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3 years ago

RUDIKE [14]

Answer:

The exhaust system of the car is the excretory system that removes waste.

The gas in the car is the digestive system that provides the necessary energy.

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3 years ago

Hi everyone how is your guys day huh I believe good right

Kisachek [45]

H, my day has been alright, how’s yours?

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1. organisms of different species that share similar characteristics most likely have..

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1. Parents from both species.

2. Because of natural selection.

Explanation:

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