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drek231 [11]
4 years ago
15

Help?

Chemistry
1 answer:
bezimeni [28]4 years ago
6 0

Answer: -35x+105

Hope it help. :)

Explanation:

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The water in a glass does not contain any other substance.what kind of water is it​
Nastasia [14]

Answer:

natural mineral water.

8 0
3 years ago
What do the brackets in chemical equations mean?
Alex777 [14]
The bracket just separate an atom or the ion and in the above it means there are two hydroxide molecules
so bracket function is just to  separate ions and molecules
hope it helps
7 0
3 years ago
The complete combustion of copper(I) sulphide is according to the following equation:
MaRussiya [10]

Answer:

a) 7.94 x 10²³ molecules, b) 5.62 g SO2, c) 1.97 L

Explanation:

a) We need to first convert Cu2S to moles. Since molar mass of Cu2S is 159.14 g/mol, 14.0 g = 0.0880 mol. Using molar ratios (3 mol O2/2 mol Cu2S, 0.0880 mol of Cu2S = 0.132 mol O2. Since 1 mol contains 6.02 x 10²³ molecules, 0.132 mol O2 = 7.94 x 10²² molecules O2.

b) Since the molar ratios of Cu2S to SO2 is 1:1, 0.0880 mol of Cu2S produces 0.0880 mol SO2. To convert mol to grams, we use the molar mass of SO2 (64.06 g/mol) to figure out that 0.0880 mol SO2 = 5.63 g SO2.

c) At STP, 1 mol occupies 22.4 liters. 0.0880 mol SO2 x 22.4 L/1 mol = 1.97 L

If you would like more tutoring in chemistry or other subjects for FREE, check out growthinyouth.org.

5 0
3 years ago
In a roller coaster, both the kinetic and potential energy in the car decreases at
Lemur [1.5K]

We can confirm that in a roller coaster, kinetic and potential energy in the car decreases at  each successive hill because of  the force of gravity which converts potential  energy into  kinetic energy.

<h3>What are potential and kinetic energy?</h3>
  • Potential energy is referred to as <em><u>positional energy</u></em>.
  • This means that the object in question gains energy based on its position relative to others.
  • Kinetic energy is the energy of movement.
  • Gravity causes the roller coaster to fall, losing potential energy.
  • This causes it to gain all of the potential energy as kinetic energy.
  • Once at the bottom, the coaster no longer moves and thus loses the kinetic energy as well.

Therefore, we can confirm that gravity is the force that causes the shift from potential energy to kinetic energy and thus causes them both to decrease after each successful hill in the roller coaster.

To learn more about kinetic energy visit:

brainly.com/question/999862?referrer=searchResults

6 0
3 years ago
What happens when you mix acid and base?
kap26 [50]
Acids are chemicals with a pH less than 7 that can donate a proton or H+ ion in a reaction. Bases have a pH greater than 7 and can accept a proton or produce an OH- ion in a reaction. If you mix equal amounts of a strong acid and a strong base, the two chemicals essentially cancel each other out and produce a salt and water. Mixing equal amounts of a strong acid with a strong base also produces a neutral pH (pH = 7) solution. This is called a neauturization and looks like 
HA + BOH → BA + H2O + heat
6 0
3 years ago
Read 2 more answers
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