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3 years ago

Please help what are the number atoms for each?!

Chemistry

1 answer:

krok68 [10]3 years ago

6 0

Answer:

AI 2 ,CR 2, O 7

Explanation:

Tbh ion even know bro like imma need more info to answer that one cheif

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An old antacid commercial claimed that each tablet of their product could neutralize 47 times its mass in stomach acid. The acti

butalik [34]

Answer : The number of moles of HCl neutralize is, 0.00824 moles.

Explanation :

The given balanced chemical reaction is:

$NaAl(OH)_2CO_3+4HCl\rightarrow NaCl+AlCl_3+3H_2O+CO_2$

First we have to calculate the moles of $NaAl(OH)_2CO_3$

$\text{Moles of }NaAl(OH)_2CO_3=\frac{\text{Mass of }NaAl(OH)_2CO_3}{\text{Molar mass of }NaAl(OH)_2CO_3}$

Molar mass of $NaAl(OH)_2CO_3$ = 144 g/mol

$\text{Moles of }NaAl(OH)_2CO_3=\frac{0.296g}{144g/mol}=0.00206mol$

Now we have to calculate the moles of HCl.

From the balanced chemical reaction we conclude that,

As, 1 mole of $NaAl(OH)_2CO_3$ react with 4 moles of HCl

So, 0.00206 mole of $NaAl(OH)_2CO_3$ react with $0.00206\times 4=0.00824$ moles of HCl

Thus, the number of moles of HCl neutralize is, 0.00824 moles.

8 0

3 years ago

You weigh two different objects on the same scale in the same location on Earth. The weights are different. What must be differe

timofeeve [1]

They can be differnt shape or one must weight more then the other one

3 0

3 years ago

Read 2 more answers

A piece of aluminum has a volume of 12 cm3and a mass of 32 g. What is its density? Do not forget the units.

Contact [7]

Answer:

<h3>The answer is 2.67 g/cm³</h3>

Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume} \\$

From the question

mass of metal = 32 g

volume = 12 cm³

The density is

$density = \frac{32}{12} = \frac{8}{3} \\ = 2.6666666...$

We have the final answer as

Hope this helps you

3 0

3 years ago

HELPPP

maxonik [38]

1 endothermic 2 yes and exothermic 3 endothermic

3 0

3 years ago

Hexane is a common laboratory solvent and a component of petrol. Its combustion reaction is as follows: 2 C6H14 (9) + 19 02(9) +

Flauer [41]

Answer : The heat released by the combustion of 1.121 mol of hexane (kJ) is, $1.01\times 10^3$

Explanation :

The given balanced reaction is,

$2C_6H_{14}(g)+19O_2(g)\rightarrow 12CO_2(g)+14H_2O(l)$

Given:

Moles of hexane = 0.121 mol

$\Delta H$ = -8326 kJ/mol

The negative sign indicate that the reaction exothermic or amount of heat released.

As, 1 mole of hexane released heat = 8326 kJ

So, 0.121 mole of hexane released heat = 8326 × 0.121 = 1007.446 ≈ $1.01\times 10^3kJ$

Therefore, the heat released by the combustion of 1.121 mol of hexane is $1.01\times 10^3kJ$ .

4 0

4 years ago