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3 years ago

Can someone help with 1 2 3 please I give you brainlest

Chemistry

2 answers:

Kryger [21]3 years ago

6 0

1. opposite
2. positive
3. negative

S_A_V [24]3 years ago

5 0

Answer:

1. Option C : oppositely charged

2. Option B : positively charged

3. Option D : negatively charged

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Find the heat produced from an 8.00 L cylinder of propane gas under 5.00 atm at 25.0 oC, if one mole of propane can produce 2220

Andrei [34K]

Answer: 3597 kJ of heat

Explanation:

According to ideal gas equation:

$PV=nRT$

P = pressure of gas = 5.00 atm

V = Volume of gas = 8.00 L

n = number of moles = ?

R = gas constant = $0.0821Latm/Kmol$

T =temperature = $25.0^0C=(25.0+273)K=298K$

$n=\frac{PV}{RT}$

$n=\frac{5.00atm\times 8.00L}{0.0821 L atm/K mol\times 298K}=1.63moles$

As it is given :

1 mole of propane produces = 2220 kJ of heat

Thus 1.63 moles of propane produces = $\frac{2200}{1}\times 1.63=3597kJ$

Thus 3597 kJ of heat is produced

4 0

3 years ago

Read 2 more answers

A chemical change occurs whenever

Talja [164]

Answer:

Explanation:

A chemical change happens when one chemical substance is transformed into one or more different substances, such as when iron becomes rust.

8 0

3 years ago

Consider the reaction below. 2Al2O3 mc019-1.jpg 4Al + 3O2 How many moles of oxygen are produced if 11.0 mol of Al are produced?

andriy [413]

Answer: 8.25 moles of oxygen are produced.

Explanation: The reaction follows:

$2Al_2O_3(s)\rightarrow 4Al(s)+3O_2(g)$

By Stoichiometry,

As, 4 moles of Aluminium is produced by 2 moles of aluminium oxide

11 moles of aluminium will be produced by = $\frac{2}{4}\times 11=5.5moles$

Now, 2 moles of aluminium oxide produces 3 moles of oxygen, so

5.5 moles of Aluminium oxide will produce = $\frac{3}{2}\times 5.5=8.25moles$

Hence, 8.25 moles of oxygen will be produced.

8 0

4 years ago

Read 2 more answers

Convert 2.54 moles of CaCl, to liters.

Agata [3.3K]

2.54 moles of CaCl occupies 56.89 liters volume

Explanation:

Each mole of any gas occupies 22.4 liters volume at STP.
STP is defined as the standard temperature and pressure and those standard values are zero degree and one atmospherics pressure
22.4 liters is a constant number as Avogadro's number which is nothing but 6.022* $10^{23}$ .
Hence, to convert 2.54 moles just multiply it with 22.4 L
That is, 22.4*2.54= 56.89 L
So, 2.54 moles of CaCl occupies 56.89 L volume space

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3 years ago

Based on the leaf cross section shown above what do you know about the plant from which it came

SIZIF [17.4K]

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3 years ago