Consider the reaction below. 2Al2O3 4Al + 3O2 How many moles of oxygen are produced when 26.5 mol of aluminum oxide are decomposed? 17.7 mol19.9 mol39.8 mol53.0 mol

Matter are anything that is made up of atoms. The quantity of matter can be observed only on the basis of mass and volume calculation. Option A, C, D are correct option.

What is matter?

Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science. Matter can be solid, liquid or gas.

Matter is anything that is made up of atoms. Anything around us that can be physically seen and touched are matter. Ice, water and water vapors are example of matter.

So as we saw that matter has some mass so mass can be measured in gram only. Mass can also be represented as number of molecules. We also saw that matter occupy some volume and that volume is measured only in liter. Degree of Celsius is used to measure temperature which has nothing to do with matter.

Thus option A, C, D are correct option.

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Answer:

Degrees Celsius

Explanation:

Just took the test lol

Answer is 56 protons and 56 electrons.

Explanation;

Atomic number is equal to number of protons. Hence, when the atomic number is 56, it means that atom has 56 protons.

When the element is in neutral state,number of protons = number of electrons. Hence, we can say that barium atom has 56 electrons.

But same element can have different number of neutrons. Those are called isotopes. Hence, we cannot say that there are 56 neutrons in barium atom without having its mass number. (Mass number = number of protons + number of neutrons)

Pb (lead) is in the 6th period

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Answer:

Sea floor spreading

Explanation:

In case of a divergent plate motion, two plates move away from another. Due to this motion, there occurs separation of the seafloor, resulting in the addition of new materials to the crust along the mid oceanic ridge. This mid oceanic ridge marks the boundary of separation of the oceanic plates. It often generates deep focus earthquakes and forms volcanoes or chains of volcanic arcs.

Thus, the separation of the two plates under water causes seafloor spreading,  and the magma fills the space along the mid oceanic ridge.

Answer:

Its acrylic, nylon, and polyester :)

Explanation: