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a_sh-v [17]
2 years ago
10

Paintball is a popular recreational activity that uses a metal tank of compressed carbon

Chemistry
1 answer:
Dovator [93]2 years ago
5 0

Answer:

Explanation:

Here we have the mass of CO₂ added = 340 g

From

Number \, of \, moles = \frac{Mass}{Molar \, mass}

We have, where the molar mass of CO₂ is 44.01 g/mol

Therefore,

Number \, of \, moles = \frac{340}{44.01} = 7.73 \, \, \, moles

71. Included drawing attached

72. Here we have the pressure of the gas given by Charles law which can be resented as follows;

\frac{P_1}{P_2} =\frac{T_1}{T_2}

Where:

P₁ = Initial pressure = 6.1 atmospheres

P₂ = Final pressure

T₁ = Initial Temperature = 293 K

T₂ = Initial Temperature = 313 K

Therefore,

P_2= T_2 \times \frac{P_1}{T_1} = 313 \times \frac{6.1}{293} = 3.312 \, \, \, atmospheres

 

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A sample of hexane (C6H14) has a mass of 0.580 g. The sample is burned in a bomb calorimeter that has a mass of 1.900 kg and a s
Mama L [17]
Use the formula, Q= mcT

Q= heat
m= mass= 1.900Kg= 1.900 x 10^3 grams
c= specific heat= 3.21 
T= 4.542 K

Q= (1.900 x10^3g)(3.21)(4.542K)= 14.6 Joules.
7 0
2 years ago
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Glade air freshener gel “disappearing” is an example of
netineya [11]

Answer:

Vaporization

Explanation:

Vaporization is the change of a specie to the gaseous state. To 'disappear' in this case simply means to change to the gaseous state.

Substances with high vapour pressure tend to be easily converted to vapour phase. Hence if Glade air freshener gel 'disappears' easily, then it has a high vapour pressure and is easily converted to vapour (gas).

8 0
2 years ago
4. a) The enthalpy change of combustion of hexane was measured using a calorimeter containing 200 cm3 of water; 0.5g of hexane (
mamaluj [8]

Answer:

The heat of combustion of hexane is -4324kjmol-1

Explanation:

Heat of combustion is the heat evolved when a mole of a substance is burned completely in oxygen under standard conditions.

To solve this problem, all the required values have been given.

Change in temperature ΔT = 30K

Mass of water =200cm3= 200g

Mass of Hexane burned = 0.5g

Step 1:

Find the amount of hear given off

Heat evolved= mass * specific eat capacity of water* temperature change

= 200 * 4.18 * 30

= 25080J

Step 2:

Calculate the relative molecular mass of hexane

RMM of C6H14 = 86g/mole.

Step 3:

Calculate the number of moles of Hexane burned

Numbrt of mole of hexane = mass / molar mass

n = 0.5 / 86

n = 0.0058mole

Step 4:

Calculate the enthalpy change of combustion for 1mole

Combustion of 0.0058mole hexane produces 25080J of heat energy

I mole hexane produces 25080 /0.0058

= 4324kJ of heat energy.

The enthalpy change of combustion of Hexane is -4,324kJmol-1.

There is no need to do anything else for the question.

7 0
2 years ago
A compound contains 30. percent sulfur and 70. percent fluorine by mass. the empirical formula of the compound is
iogann1982 [59]
Assume 100 g of compound. This turns percent to mass. Calculate moles: 

S ---> 30/32 = 0.9375 
F ---> 70 / 19 = 3.6842 

get whole number ratio: 

0.9375 / 0.9375 = 1 
3.6842 / 0.9375 = 3.93 = 4 

Answer : SF4
7 0
2 years ago
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What is the chemical formula of a compound that is composed of the ions Camc007-1.jpg and Brmc007-2.jpg?
AlekseyPX
Calcium ions have oxidation state 2+ => Ca (2+).

Bromime ions (bromide) have oxidation state 1- => Br (-).

So, to be neutral the compound has to have two Br (-) ions per each Ca(2+) ion.

That is represented in the chemical formula as Ca Br2, where the number 2 to the right of Br is a subscript meaning that there are two atoms of Br per each atom of Ca (the lack of subscript means 1 atom).

Answer: Ca Br2.
6 0
2 years ago
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