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dybincka [34]
3 years ago
15

Acids are used to make... 1. mortar and cement 2. baking soda 3. car batteries

Chemistry
1 answer:
mr Goodwill [35]3 years ago
7 0
That is correct! Great Job High School!
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If 45.6 grams of water decompose at 301 Kelvin and 1.24 atmospheres, how many liters of oxygen gas can be produced? Show all of
Artyom0805 [142]

This reaction is called the electrolysis of water. The balanced reaction is:

 2H2O = 2H2 + O2

<span>
We are given the amount of water for the electrolysis reaction. This will be the starting point of our calculation.

45.6 grams H2O (1 mol H2O / 18.02 g H2O) (1 mol O2 / 2 mol H2O) = 1.27 mol O2

V = nRT/P = </span><span>1.27 mol O2 (0.08206 atm L / mol K) (301 K) / 1.24 atm
V = 25.20 L O2</span>
6 0
3 years ago
Calculate the standard enthalpy change for the reaction at 25 ∘ C. Standard enthalpy of formation values can be found in this li
Anastasy [175]

Answer:

-179.06 kJ

Explanation:

Let's consider the following balanced reaction.

HCl(g) + NaOH(s) ⟶ NaCl(s) + H₂O(l)

We can calculate the standard enthalpy change for the reaction (ΔH°r) using the following expression.

ΔH°r = 1 mol × ΔH°f(NaCl(s)) + 1 mol × ΔH°f(H₂O(l)) - 1 mol × ΔH°f(HCl(g)) - 1 mol × ΔH°f(NaOH(s))

ΔH°r = 1 mol × (-411.15 kJ/mol) + 1 mol × (-285.83 kJ/mol) - 1 mol × (-92.31 kJ/mol) - 1 mol × (-425.61 kJ/mol)

ΔH°r = -179.06 kJ

7 0
3 years ago
What happens to metal when rapidly heated then cooled
Anna [14]

Answer:

It is called tempering. Its tensile strength may reduce but it will become more rigid and hard to break compared to the original metal.

Explanation:

( Source : Quora )

4 0
2 years ago
I need help on #'s 4 and 5
kompoz [17]
The answer for four is frequency.
3 0
3 years ago
My sister is a peach" is a metaphor.<br><br><br> TrueFalse
dolphi86 [110]
Yes that is a metaphor 

6 0
3 years ago
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