What is water displacement?????

Answers

Answer 1

Answer: When you put an object in water it moved the water to make room for itself. It is used to measure

Answer 2

Answer: Water displacement was discovered by the Greek thinker Archimedes in the 3rd century BC. He worked out that if you put an object in water, the amount of water displaced (thrown out) is equal to the volume of that object. By measuring the overflow of water, you can work out the volume of the object (it only really works if the object is non-porous/ can't soak up the water. In fluid mechanics, displacement occurs when an object is immersed in a fluid, pushing it out of the way and taking its place. The volume of the fluid is displaced can then be measured.

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What is the balanced chemical equation for the reaction between Hydrochloride acid and calcium carbonate when the products of the reaction are calcium chloride Carbon Dioxide and water

Answers

Answer: 2HCl + CaCO3 => CaCl2+ CO2 + H2O

Explanation:

The equation is now balanced.

2 atoms H in both reactant and product side.

Cl have 2 atoms on both sides.

Ca have 1 atom in both sides.

C have 1 atom on both sides and

O have 3 atoms on both reactant and product side

Water initially present in a state where molecules are far apart. During a chnge of state, its molecules slow down. Which change of state has most likely taken place?A. From gas to a liquid
B. From a liquid to gas
C. From solid to liquid
D. From a gas to plasma

Answers

Answer:

is the letter A. from gas to a liquid

2.2.4 Quiz: The Periodic TableQuestion 3 of 10
2. Points
How is hydrogen in heavy water different from hydrogen in normal water?
A. The hydrogen atoms in heavy water have a neutron in the nucleus,
doubling the mass.
B. The hydrogen atoms in heavy water have an extra proton in the
nucleus.
O
C. The hydrogen in heavy water is radioactive.
O
D. The heavy water molecules contain 3 hydrogen atoms instead of

Answers

Hydrogen in heavy water different from hydrogen in normal water as the hydrogen atoms in heavy water have a neutron in the nucleus,doubling the mass.

What is an atom?

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

Learn more about atom,here:

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Answer:

Explanation:

Heavy water (deuterium oxide, 2

2O, D

2O) is a form of water that contains a larger than normal amount of the hydrogen isotope deuterium (2

H or D, also known as heavy hydrogen), rather than the common hydrogen-1 isotope (1

H or H, also called protium) that makes up most of the hydrogen in normal water.[4] The presence of deuterium gives the water different nuclear properties, and the increase of mass gives it slightly different physical and chemical properties when compared to normal water. It can be used to create ice and snow at higher temperatures since its melting point is 3.82 C.

To safely observe the odor of a chemical in a test tube you should?

Answers

Answer:

Waft

Explanation:

You should waft you hand from the tube to your face you should never smell directly or it could harm you hope this helped :)

Whenever dealing with any chemicals it is important to wear safety googles, gloves, safe cloths, and especially a safety mask. You never know how bad can the chemicals harm your body, so its important for you to not inhale them or even get contact with any part of your body. The most safely way to observe the odor of a chemical in a test tube, you should always were safety gears.

Hope this Helps!

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What coefficient values will balance the reaction?Mg + O2 ?MgO
A. 1,2,1
B. 1,2,2
C. 2,1,2
D. 1,1,2

Answers

Answer:

Explanation:

1,2,2

we O2 then we supposed to balance the one that will give Mg+O2-2MgO

Ethanol contains the elements carbon, hydrogen, and oxygen. When ethanol burns, it chemically reacts with oxygen gas.C2H6O + O2
ethanol oxygen gas

What elements will be present in the substances that are created when ethanol burns?
A.
nitrogen, sulfur, and sodium only
B.
carbon, hydrogen, and oxygen only
C.
the elements cannot be determined
D.
carbon and hydrogen only
correct answer is B I answered my own question! lol

Answers

Answer: The correct answer is Option B.

Explanation:

Every balanced chemical equation follows law of conservation of mass. This law states that mass can neither be created nor be destroyed but it ca only be transformed from one form to another form.

In a chemical reaction, total number of individual atoms on the reactant side must be equal to the total number of individual atoms on the product side.

During a chemical reaction, the atoms on the reactant side must also be present on the product side.

For the given reactants, the chemical equation will follows:

$2C_2H_6O+6O_2\rightarrow 6CO_2+6H_2O$

As, the reactant side contained carbon, hydrogen and oxygen atoms only. So, the product will also contain the same atoms.

Hence, the correct answer is Option B.

B. carbon, hydrogen, oxygen

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