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2 years ago

Which of these equations is balanced?

Chemistry

2 answers:

olga nikolaevna [1]2 years ago

4 0

Both are already balanced. So, your answer would be: C. a and b

skelet666 [1.2K]2 years ago

3 0

To calculate your answer:
list atoms
multiply by subcript outside parentheses
multiply by coefficient

3 H2SO4 + 2Al → Al2(SO4)3 + 3H2

H 2 x3 =6 H 2 x 3 = 6
S 1 x 3 = 3 S 1x 3 = 3
O 4 x3 = 12 O 4 x 3 = 12
Al 1 x 2 = 2 Al 2

This one is balanced . . . now you try the other one. Let me know if you still need help

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A 1.0-L buffer solution is 0.10 M in HF and 0.050 M in NaF. Which action destroys the buffer? (a) adding 0.050 mol of HCl (b) ad

Volgvan

Answer:

(a) adding 0.050 mol of HCl

Explanation:

A buffer is defined as the mixture of a weak acid and its conjugate base -or vice versa-.

In the buffer:

1.0L × (0.10 mol / L) = 0.10 moles of HF -Weak acid-

1.0L × (0.050 mol / L) = 0.050 moles of NaF -Conjugate base-

-The weak acid reacts with bases as NaOH and the conjugate base reacts with acids as HCl-

Thus:

(a) adding 0.050 mol of HCl: The addition of 0.050moles of HCl produce the reaction of 0.050 moles of NaF producing HF. That means after the reaction, all NaF is consumed and you will have in solution just the weak acid destroying the buffer.

(b) adding 0.050 mol of NaOH: The NaOH reacts with HF producing more NaF. Would be consumed just 0.050 moles of HF -remaining 0.050 moles of HF-. Thus, the buffer wouldn't be destroyed.

3 0

2 years ago

Given that equation Na+(s)O2–> Na2O. Find the mass of sodium needed to produce 12.5 grams of sodium oxide.

Norma-Jean [14]

Answer: 9.27 g of Na

Explanation:Please see attachment for explanation

7 0

2 years ago

Why would a metal house not be a good idea in Florida or Alaska?

dolphi86 [110]

It wouldn’t be a good idea bc metal absorbs the weather around it. so in florida it would be too hot and in alaska it would be too cold!

3 0

2 years ago

Read 2 more answers

Why is conical flask used in the freezing point of naphthalene activity?

SpyIntel [72]

Answer:

D. To ensure the cooling process is not affected by surrounding temperature

Explanation:

The conical flask acts as a temperature jacket.

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2 years ago

How many mols of chlorine are in 120g of chlorine gas

xz_007 [3.2K]

Answer:

Number of moles of chlorine = 3.38 mol

Explanation:

Given data:

Mass of chlorine = 120 g

Moles of chlorine = ?

Solution:

Formula:

Number of moles = mass/molar mass

Molar mass of chlorine = 35.5 g/mol

Now we will put the values in formula.

Number of moles = 120 g/ 35.5 g/mol

Number of moles = 3.38 mol

6 0

2 years ago