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Answer: alkali metal

Explanation: ONLY if that is in you suggestions

if not i think this is right

Answer:

Explanation:

Balance the reaction of Al + HCl = AlCl3 + H2 using this chemical equation balancer!

Answer:

The produced mass of copper should equal the starting mass of copper.

Answer:

Explanation:

It would be positively charge

Answer:

a water suppley is water that pepople buy to dreak and ues

Explanation:

laboratory safety rules:

~Avoid wye contact with all chemics

~ Avoid skin contact with all chemicals

~Always wear safety glasses

~Don't eat in the lab

~Don't drink anything in the lab

~Avoid wearing jewellery

~Don't taste or sniff any chemicals

~Kn0w emergency exit routes

~Never leave containers of chemicals open

~Avoid distracting anyone else working in the lab

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Answer:A

Explanation:

Answer: 760 mm

Explanation:

At sea level, a mercury column will rise a distance of 760 mm. At higher altitudes, the atmospheric pressure is decreased and so the column of mercury will not rise as high.

Answer:

Accuracy

I guess

Cause then it makes sense

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Answer:

Once the parachute is opened, the air resistance overwhelms the downward force of gravity. The net force and the acceleration on the falling skydiver is upward. ... The skydiver thus slows down. As the speed decreases, the amount of air resistance also decreases until once more the skydiver reaches a terminal velocity.

When the skydiver is falling at a constant velocity after the parachute is open, acceleration is zero.

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Answer:

Pure substances made of more than one element are called. compounds. The chemical formula for a molecule of nitrogen is. N2. The balanced equation for the formation of water from the elements hydrogen and oxygen is.

Answer:

A compund

Explanation:

Did test got 100

Answer:

D

Explanation:

Its D

Answer:

Its d for edge

Explanation:

When the cell potential is positive then the electrochemical reaction is spontaneous. The Ecell is positive when Zn serves as cathode and Mg serves as anode hence the reaction is spontaneous.

An electrochemical cell is any type of cell in which energy is produced by a spontaneous chemical reaction. Redox reactions that occur in an electrochemical cell produce energy.

An electrochemical cell becomes spontaneous only when Ecell is positive. Ecell is positive when a metal that has a more negative electrode potential serves as the anode.

Since Mg has a more negative electrode potential that Zn, it follows that a cell in which Mg is the anode and Zn is the cathode will have a positive Ecell and the reaction will be spontaneous.

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Explanation:

A balanced equation demonstrates the conservation of mass by having the same number of each type of atom on both sides of the arrow. enjoy

Answer:

It show that no atoms have been gained or lost during reaction

Explanation:

Answer:

4chlorine;12thousand ;17zinc;2grams;three 8carbon;15aluminium

Answer:

the first one

Explanation:

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Answer:

The answer is true. ozone in the stratosphere is a toxic pollutant that can cause tightness or shortness of breath.

The scientific principle was surmised by Werner Heisenberg and it is called Heisenberg's uncertainty principle.

In 1927 German scientist Werner Heisenberg propounded the uncertainty principle which states that both the position and momentum of a particle cannot be measured simultaneously with certainty.

That is, the more accurate we measure the position of the particle, the less accurate we would measure its momentum.

Heisenberg's uncertainty principle is stated mathematically as ΔpΔx ≥ h/4π where p is the momentum, x is the position and h is Planck's constant.

So, the scientific principle was surmised by Werner Heisenberg and it is called Heisenberg's uncertainty principle.

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C)

Only valence electrons are involved in forming chemical bonds betwen two atoms.

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Answer:

The answer is unsaturated

Answer:

supersaturated

Explanation:

Answer:

Lung function decreses at a faster rate for young people (last answer choice)

Explanation:

Answer:

true/ correct

Explanation:

Answer:

Prokaryotic / Eukaryotic

Answer:

Combustion

Explanation:

The process of adding oxygen to anything is called combustion

Answer:

Gold is chemically stable and conducts electricity.

Small pockets of gold are used to make mobile phone circuit board.

The plastic is lined to act as antenna gate. It's what makes a phone not a calculator but a communication point, since it allows the data flow, Bluetooth connection, Wi-Fi. Mainly, it allows radio waves to flow.

The source of gases for the secondary atmosphere of the earth was Volcanic Eruptions.

The scientist think that the atmosphere today is completely different from what it used to be originally and therefore they call it secondary atmosphere.

Internal volcanic activity or the deposit of debris from comet collisions produce a secondary atmosphere. 

The secondary atmosphere is thought to have formed as a result of the numerous volcanic eruptions that occurred from the start of Earth's early periods.

Although each volcano is unique, they all emit gases such as H₂O, CO₂, SO₂, H₂S, HCl, N₂, NO₂, and others.

These gases are formed due to melting of the Earth's crust.

Volcanic activity  renew the atmosphere's molecules.

These molecules are not the Nitrogen and Oxygen that make up the atmosphere today.

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