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3 years ago

The reaction of hydrogen gas with oxygen gas is what type of reaction precipitation single replacement

1 answer:

5 0

The reaction of hydrogen gas (H2) with oxygen gas (O2) is a COMBINATION or SYNTHESIS reaction, because multiple substances combine to form fewer substances. Here, the two gases form one substance, water (H2O):
2H2 + O2 -- > 2H2O

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Which of the following are ionic, and which are molecular? (a) Sc2O3 ionic molecular (b) NaI ionic molecular (c) SCl2 ionic mole

tangare [24]

Answer :

Ionic compound : (a), (b), (d), (e), (f), (g) and (h)

Molecular compound : (c)

Explanation :

Ionic compound : It is defined as the compound which is formed when electron gets transferred from one atom to another atom.

Ionic compound are usually formed when a metal reacts with a non-metal.

Covalent compound : It is defined as the compound which is formed by the sharing of electrons between the atoms forming a compound.

The covalent compound are usually formed when two non-metals react.

All the polyatomic ions always form an ionic compound.

Polyatomic ions : It is a charged species that composed of two or more atoms and these charged species are bonded by the covalent bond.

As we know that the molecular compounds are the covalent compounds.

(a) Sc₂O₃

This is an ionic compound because it is made up of scandium metal and oxygen non-metal elements.

(b) NaI

This is an ionic compound because it is made up of sodium metal and iodine non-metal elements.

(c) SCl₂

This is an molecular compound because it is made up of sulfur and chlorine non-metal elements.

(d) Ca(NO₃)₂

This is an ionic compound because it is made up of calcium metal and polyatomic ion $(NO_3^-)$ non-metal elements.

(e) FeCl₃

This is an ionic compound because it is made up of iron metal and chlorine non-metal elements.

(f) LaP

This is an ionic compound because it is made up of lanthanum metal and phosphorous non-metal elements.

(g) CoCO₃

This is an ionic compound because it is made up of cobalt metal and polyatomic ion $(CO_3^{2-})$ non-metal elements.

(h) (NH₄)₂SO₄

This is an ionic compound because it is made up of ammonium ion and sulfate ion.

3 0

3 years ago

While performing a recrystallization, a chemist notices that a small amount of the sample will not dissolve, even after the recr

Tpy6a [65]

Answer: A. Perform a gravity filtration with a stemless funnel.

Explanation: Gravity filtration with a stemless funnel prevent blocking up the funnel. Undissolved sample may come out in the stem when the solution cools down thus will be blocking the funnel. Using stemless funnel prevent this problem.

7 0

4 years ago

An isotope of mercury has 80 protons and 120 neutrons. What is the mass number of this isotope?

n200080 [17]

The correct answer is two hundred for its mass number as eighty plus hundred and twenty is two hundred hence the answer is the last option

5 0

3 years ago

In the periodic table which of these elements has the smallest atomic radius ?

vivado [14]

I think its Helium correct me if I'm wrong plz.

7 0

3 years ago

Nitric oxide (NO) reacts with oxygen gas to produce nitrogen dioxide. A gaseous mixture contains 0.66 g of nitric oxide and 0.58

tigry1 [53]

Answer:

NO is the limiting reagent.

In this reaction 0.886 mole of NO2 is produced

Explanation:

The chemical equation for this reaction is

2NO(g) + O2(g) → 2NO2(g)

In this limiting reagent reaction, 2 moles of NO reacts with one mole of O2 to produce 2 mole of 2NO2

0.886 mole of NO * (2 mole of NO2/2 mole of NO) = 0.886 mole of NO2

0.503 mole of O2 * (1 mole of NO2/1 mole of O2) = 1.01 mole of NO2

Hence, NO is the limiting reagent.

In this reaction 0.886 mole of NO2 is produced

3 0

3 years ago