This alkyl halide can be prepared by electrophilic addition of HBr to 3 different alkenes. Draw them.

If a swimming pool contains 2,850 kiloliters (kL) of water, how many gallons (gal) of water does it contain? (1 gal = 3.785 L)

siniylev [52]

we are given

a swimming pool contains 2,850 kiloliters (kL) of water

2,850 kiloliters (kL)=2850000L

we know that

$1gal=3.785L$

$3.785L=1gal$

Firstly , we will find for 1L

$1L=\frac{1}{3.785}gal$

now, we can multiply both sides by 2850000

$2850000*1L=2850000*\frac{1}{3.785}gal$

$2850000L=2850000*\frac{1}{3.785}gal$

$2850000L=752972.25892gal$

so,

a swimming pool contains 752972.25892gal of water...........Answer

6 0

4 years ago

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C₂H₅0H+30₂→2CO₂+3H₂0,the change of enthalpy was ΔH= - 1235.7 KJ/mol

igor_vitrenko [27]

Answer:

The total enthalpy of the reaction has negative value which mean that the heat is lost during the chemical reaction into surroundings.

Explanation:

Exothermic reactions are defined as the reactions in which energy of reactants is more than the energy of the products. In these reactions, energy is released by the system.

The total enthalpy of the reaction $(\Delta H)$ comes out to be negative.

Endothermic reactions are defined as the reactions in which energy of products is more than the energy of the reactants. In these reactions, energy is absorbed by the system.

The total enthalpy of the reaction $(\Delta H)$ comes out to be positive.

$C_2H_5OH+3O_2\rightarrow 2CO_2+3H_2O$ ,ΔH= -1235.7 kJ/mol

The total enthalpy of the reaction has negative value which mean that the heat is lost during the chemical reaction into surroundings.

5 0

3 years ago

If I have one mole of gold atoms, how many gold atoms do I have?

yuradex [85]

Answer:

6.022 X 10^23

Explanation:

avatars number states that for every mole of an element there are 6.p22 X 10^23 atoms of that element

3 0

3 years ago

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Oxygen gas, generated by the reaction 2 KClO 3 ---- 2 KCl + 3 O 2 , is collected over water at 27 C in a 2.00 L vessel at a tota

laila [671]

Answer:

The moles of KClO3 = 0.052 moles

Explanation:

Step 1: Calculate the pressure of oxygen gas

The oxygen has a total pressure (including water vapour) of 760 mmHg

The pressure of Oxygen = (760 - 26) mmHg

= 734 mmHg of water vapor

Step 2: Calculate the no of moles of oxygen

Using Ideal gas equation

P V = n R T

P = pressure of oxygen in N/m2 ( you should convert 734 mmHg to pascal or N/m2) = 97,858.6 N/m2 or pas

V = 2 litres = 0.002 m3

R = gas constant = 8.31

T= 27oC = 300 K

Applying this equation P V = n R T

97,858.6 x 0.002 = n x 8.31 x 300

n = 0.0785 mol of Oxygen

From the balanced equation

2 KClO 3 ---- 2 KCl + 3 O 2

3 moles of oxygen is produced from 2 moles KClO3

so 0.0785 mole of oxygen will be produced from x

x = (0.0785 x 2 ) / 3

x = 0.052 moles of KClO3

5 0

4 years ago

4. Chemical formula, mg (Cl0₃)2

grin007 [14]

Answer:

0.017mole

0.0033M

Explanation:

Given parameters:

Formula of the compound:

Mg(ClO₃)₂

Mass of the sample = 3.24g

Unknown:

Number of moles of the sample = ?

Molarity = ?

Solution:

The number of moles of any substance is given as:

Number of moles = $\frac{mass}{volume}$

Molar mass of Mg(ClO₃)₂ = 24 + 2[35.5 + 3(16)] = 191g/mol

Number of moles = $\frac{3.24}{191}$ = 0.017mole

Molarity is the number of moles of a solute in a solution:

Molarity = $\frac{number of moles }{volume}$

Volume given = 5.08L

Molarity = $\frac{0.017}{5.08}$ = 0.0033M

5 0

4 years ago