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inna [77]
3 years ago
7

Which of the following is a way that trees have been negatively impacted by human use?

Chemistry
1 answer:
Novay_Z [31]3 years ago
5 0
The people cut down the trees
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2Fe + 6HCl -> 2FeCl3 + 3H2 If 7.0 moles of HCl is added to enough iron that the HCl is completely used up, how many
DENIUS [597]

Answer: 3.5 moles of hydrogen gas will be produced.

Explanation:

The balanced chemical equation is:

2Fe+6HCl\rightarrow 2FeCl_3+3H_2

As HCl gets completely used up, HCl is the limiting reagent.

According to stoichiometry :

6 moles of HCl produces =  3 moles of H_2

Thus 7.0 moles of  HCl produces=\frac{3}{6}\times 7.0=3.5moles  of H_2

 Thus 3.5 moles of hydrogen gas will be produced.

3 0
2 years ago
Which statement best describes mechanical energy?
pav-90 [236]

Answer:

The energy of moving parts and motion

Explanation:

Mechanical energy doesn't have change in temperature or heat, so electricity and heat would be cancelled out. Mechanical energy is more about motion.

3 0
2 years ago
What is a process of reacting an acid with a base until an equivalence point is reached
Brrunno [24]
TITRATION is the process of reaching equilibrium between acids and bases.
8 0
3 years ago
Which of these is the smallest volume 500mL, 2,500 cm3, 5.5•10-1, 25 m3
mezya [45]
25m³.
500mL = 500cm³
25m³ = 2,500cm³
5.5x9 = 49.5(cm³)
25m³ is the smallest among the others.
5 0
3 years ago
1. Addition of which of the following will increase the solubility of CaCO3 in water? Consider the equilibrium process:
kolbaska11 [484]

Answer: HCl

Explanation:

calcium carbonate dissolves in HCl acid producing CO 2 gas. It will not dissolve in pure water. The Ksp for calcium carbonate in water is 3.4 x 10-9 moldm-3 which is very low. What takes place here is actually a chemical reaction:

CaCO 3 (s) + 2HCl(aq) → CaCl 2 (aq) + H 2CO 3(aq)

This reaction accounts for the solubility of the Calcium carbonate in HCl and not in pure water.

6 0
3 years ago
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