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BabaBlast [244]
4 years ago
9

What subatomic particle gives off visible light when it drops back down to a lower energy state?

Chemistry
1 answer:
Black_prince [1.1K]4 years ago
4 0
The subatomic particle that gives off visible light is electrons
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A 50 kg object _____.
stich3 [128]

Answer:

will have more mass the moon than the earth

Explanation:

hope this helps

8 0
3 years ago
What type of reaction occurs in a hand warmer?<br> Exothermic<br> Endothermic
storchak [24]

Answer:

The reaction is exothermic.

Explanation:

8 0
3 years ago
What is the pH of a solution that contains 25 grams of hydrochloric acid (hcl) dissolved in 1.5 liters of water?
Darina [25.2K]
First we calculate the concentration of HCl:

Moles = mass / Mr
= 25 / 36.5
= 0.685 mol

Concentration = 0.685/1.5 = 0.457 mol / dm³

For a strong monoprotic acid, the concentration of hydrogen ions is equal to the acid concentration.

pH = -log[H+]
pH = -log(0.457)
= 0.34
4 0
3 years ago
Acids and bases can neutralize each other in double displacement reactions. For example, if hydrogen chloride (a strong acid, HC
scoray [572]

Answer:

The answer to your question is    HCl  +  NaOH   ⇒   NaCl  +  H₂O

Explanation:

Data

Double displacement reaction

Balanced chemical reaction

               HCl  +  NaOH   ⇒   NaCl  +  H₂O

           Reactants           Elements                Products

                 1                  Chlorine (Cl)                    1

                 1                   Sodium (Na)                   1

                 2                 Hydrogen (H)                  2

                 1                   Oxygen (0)                      1

As we can see, the reaction is balanced and the coefficients of all reactants and products are 1, but the number is not written in a balanced reaction.

8 0
3 years ago
If u answer will answer the brainlest
klio [65]

Answer:

the electricity dissipated, because of the time.

Explanation:

electricity dissipates.

6 0
2 years ago
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