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Gnesinka [82]
3 years ago
15

What family has 4 valence electrons?

Chemistry
1 answer:
PilotLPTM [1.2K]3 years ago
4 0

Answer:carbon group

Explanation:

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Answer:

Weight is mass times gravity

Explanation:

The mass is the weight gravity is the force of attraction and weight is the power pulled by the gravity or smthn like that

6 0
4 years ago
3. What is natural selection?
Alex17521 [72]

Answer:

Explanation:Natural Selection is where animals move to a new enviornment and the ones that can survive mate and those that survive will mate.

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3 years ago
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Thermal energy always moves from a greater energy level to a lesser energy level
Nookie1986 [14]

Answer:

\fbox{Law -Based \: on \: laws \: of \: thermodynamic}

Explanation:

At constant pressure Thermal energy always moves from a greater energy level to a lesser energy level, laws of thermodynamics prove that.

Nature always likes to attain equilibrium either it's movement of heat energy or flow of water from higher region to lower region. The first and second law of thermodynamics are profe of that, the first law says that the total energy of universe is Constant. Energy can not be destroyed it always changes from one form to another, by work and heat. The second law explains why thermal energy moves from a greater energy level to a lesser energy level, it deals with the change in entropy of a system and surrounding and states heat flows from hot environment to cold environment.

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6 0
3 years ago
When zinc react with concentrated hydrochloric acid
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The reaction between zinc and hydrochloric acid is Zn + HCl = H2 + ZnCl2. It is a single replacement reaction where zinc metal displaces the hydrogen to form hydrogen gas and zinc chloride, a salt. Zinc reacts quickly with the acid to form bubbles of hydrogen.
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Barium and lead both produce yellow precipitate with the chromate ion as part of their confirmation tests. if you had a sample t
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Barium is an element that is primarily used in fireworks because of its distinct green colour while on the other hand, lead is used in electrical industries due to its unique properties. The ions of these elements can simply be identified when its insoluble salts get precipitated by any process.
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