A population of an animal decreased, and it is believed to be due to industrialization (pollution). What is the

When 4.5 mol al react with 11.5 mol hcl, what is the limiting reactant, and how many moles of h2 can be formed?

ahrayia [7]

1°/ . 2 Al + 6 HCl → 2 AlCl3 + 3 H2

k1 = n(Al) / 2 = 4,5 / 2 = 2,25 
k2 = n(HCl) / 6 = 11,5 / 6= 1,92 

k2 < k1 ==> HCl is the limiting reactant 

6 mol of HCl ---> 2 mol of H2 
11,5 mol of HCl ---> 3,83 mol of H2

5 0

3 years ago

Aluminum reacts with excess copper(II) sulfate according to the unbalanced reaction

labwork [276]

Answer: The mass of Cu produced is 4.88 g

Explanation:

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

The equation used is:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ ......(1)

Given mass of aluminum = 2.98 g

Molar mass of aluminum = 27 g/mol

Plugging values in equation 1:

$\text{Moles of aluminum}=\frac{2.98g}{27g/mol}=0.1104 mol$

The given chemical equation follows:

$2Al(s)+3CuSO_4(aq)\rightarrow Al_2(SO_4)_3(aq)+3Cu(s)$

By the stoichiometry of the reaction:

If 2 moles of aluminum produces 3 moles of Cu

So, 0.1104 moles aluminium will produce = $\frac{3}{2}\times 0.1104=0.1656mol$ of Cu

Molar mass of Cu = 63.5 g/mol

Plugging values in equation 1:

$\text{Mass of Cu}=(0.1656mol\times 63.5g/mol)=10.516g$

The percent yield of a reaction is calculated by using an equation:

$\% \text{yield}=\frac{\text{Actual value}}{\text{Theoretical value}}\times 100$ ......(2)

Given values:

% yield of product = 46.4 %

Theoretical value of the product = 10.516 g

Plugging values in equation 2, we get:

$46.4=\frac{\text{Actual value of Cu}}{10.516g}\times 100\\\\\text{Actual value of Cu}=\frac{46.4\times 10.516}{100}\\\\\text{Actual value of Cu}=4.88g$

Hence, the mass of Cu produced is 4.88 g

8 0

3 years ago

S Data: Cu 63.55 g mol¹; Ag 107.87 g mol-¹ the entities trate Please help me!!!

natulia [17]

Answer: 34.5 g of Copper reacts with 70.2 g of silver nitrate according to the following balanced equation: Cu + 2AgNO→ Cu(NO3)2 + 2Ag a) What is the limiting reactant

Explanation:

5 0

2 years ago

What structure does a eukaryotic cell have that a prokaryotic cell does not?

Stolb23 [73]

The answer is a Nucleus. Eukaryotic cells have nuclei while;e prokaryotic cells do not.

5 0

3 years ago

What can you use a convex lens to do when you hold it close to an object?

andrew-mc [135]

Clearly, moving the object closer to the lens makes the image become both larger and further away. As you move the object closer and closer to the focal point, the image will become further and further away. ... As expected the image moves further away and becomes much bigger than the object.

5 0

3 years ago

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