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Ganezh [65]
3 years ago
9

Write the electronic configuration of calcium having an atomic number of 33-

Chemistry
1 answer:
algol [13]3 years ago
3 0

Answer:

Ca scans scan sk wo wka d Turkey show alone kar s

Explanation:

HHhah hahah ahhahh she sha aja aw

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Burning 87.81 grams of hexane will release __ g of water.
olchik [2.2K]
<h3><u>Answer;</u></h3>

<u>= 128.772 g of water</u>

2C6H14 + 13 O2 → 6CO2 + 14 H2O

<h3><u>Explanation</u>;</h3>

1 mole of Hexane contains 86 g

Therefore;

87.91 grams of hexane will contain

= 87.91 g/86 g

= 1.022 moles

The balanced reaction for the combustion of Hexane is given by

2C6H14 + 13 O2 → 6CO2 + 14 H2O

Therefore; the mole ratio of C6H14 :H2O is

= 2 : 14

= 1: 7

therefore moles of water from 1.022 moles of Hexane will be;

= 1.022 ×7

= 7.154 moles

Mass of water will be;

= 7.154 moles× 18

<u>= 128.772 g of water</u>

7 0
3 years ago
Read 2 more answers
Example for next four problems:
Lena [83]

Answer:

Compound formula : HCl

Element H

# atoms:1

Elements Cl

#atoms : 1

gram formula weight (g) = 36.46

4 0
3 years ago
TIMED TEST PLEASE HURRY!!! The development of a new experimental method is most likely to change a theory if it makes it possibl
uysha [10]

Answer:

1. analyze the samples while they are frozen

stuff can react differently when it's colder

hope I could help good luck

5 0
3 years ago
Read 2 more answers
How many moles of gas does it take to occupy 25.6 liters at a pressure of 6.2 atmospheres and a temperature of 309.3 K?
Vilka [71]

Answer:

45 moles.

Explanation:

7 0
3 years ago
Hydrogen is prepared commercially by the reaction of methane and water vapor at elevated temperatures. CH₄(????) + H₂O(????) ⇌ 3
sammy [17]

Answer:

6.2846

Explanation:

Given that:-

Concentrations at equilibrium :-

[CH_4]=0.126\ M

[H_2O]= 0.242\ M

[CO]= 0.126\ M

[H_2]= 1.15\ M

The equilibrium reaction is:-

CH_4+H_2O\rightleftharpoons 3H_2+CO

The expression for equilibrium constant is:

K_{c}=\frac {\left [ H_2 \right ]^3\left [ CO \right ]}{\left [ CH_4 \right ]\left [ H_2O \right ]}

Applying the values as:-

K_c=\frac{1.15^3\times 0.126}{0.126\times 0.242}=6.2846

<u>The equilibrium constant for the reaction is:- 6.2846</u>

5 0
3 years ago
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