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ElenaW [278]
3 years ago
10

According to the Periodic Table of Elements, Calcium has:

Chemistry
1 answer:
lana [24]3 years ago
3 0

Answer:

20 protons and 20 electrons

Explanation:

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Balance the equation below:<br> HNO3 + CaCO3 Ca(NO3)2 + H2O + CO2
Allisa [31]

Answer:

2 HNO3 + CaCO3 = Ca(NO3)2 + H2O + CO2

Explanation:

Given Equation :

HNO_3 + CaCO_3 = Ca(NO_3)_2 + H_2O + CO_2

Balanced Equation

2 HNO_3 + CaCO_3 = Ca(NO_3)_2 + H_2O + CO_2

8 0
3 years ago
The kidneys in human beings are a part of the system for​
Tpy6a [65]
The kidneys in humans are a part of the system for excretion

Extraction is the process of eliminating waste matter.
4 0
4 years ago
Given the incomplete equation representing a reaction:
sergey [27]

Answer : The formula of the missing product is, OH^_

Explanation :

The given incomplete equation representing a reaction,

2Na(s)+2H_2O(l)\rightarrow 2Na^+(aq)+2__(aq)+H_2(g)

When the sodium metal react with the water then it gives a colorless solution of sodium hydroxide and hydrogen gas. In the solution, sodium hydroxide is present in the form of ions i.e, Na^+ and OH^- ions.

The balanced chemical reaction will be,

2Na(s)+2H_2O(l)\rightarrow 2Na^+(aq)+2OH^-(aq)+H_2(g)

Therefore, the formula of the missing product is, OH^_

3 0
3 years ago
Read 2 more answers
Light energy (in both visible and invisible forms) is a form of _____ energy.
Ainat [17]

Answer:

D: Electromagnetic

Explanation:

Chemical energy is the energy in chemical bonds which is a type of potential energy, eliminating both B and C. While kinetic energy is the energy of motion, photons are a wave/ particle so thinking it would have kinetic energy wouldn't be your fault but light is on the electromagnetic spectrum making D the most likely answer.

7 0
3 years ago
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At the end of seafloor spreading, where does the molten rock solidify?
olganol [36]

Answer:

As the two plates move apart from each other, which often occurs at a rate of several centimetres per year, molten rock wells up from the underlying mantle into the gap between the diverging plates and solidifies into new oceanic crust. Spreading centres are found at the crests of oceanic ridges.

Explanation:

I found this answer by taking notes in class

8 0
3 years ago
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