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Darina [25.2K]
2 years ago
7

Make a quantitative and qualitative statement about the following:. water, carbon, iron, hydrogen gas, sucrose, table salt, merc

ury, gold, air.
Chemistry
2 answers:
gladu [14]2 years ago
8 0
The elements in this list are mercury, gold, iron, carbon and hydrogen. The compounds in this list, on the other hand, are sucrose, table salt, water and air. Elements are composed only of one substance while compounds are composed of two or more substances.
EastWind [94]2 years ago
4 0

Explanation:

Quantitative statement provide us information regarding the quantity which can be measured or can be written down in numeric form.

Qualitative statement provide us information regarding the quality or trat which cannot be measured.

1) Water has density of 1 g/ml.

Water is colorless in color.

2) Carbon has 6 electrons , 6 protons and  6 neutrons in it atom.

Carbon is an element which has black color and non metal.

3) Iron has boiling point of 2,862 °C.

Iron is a metal and good conductor of electricity.

4)Hydrogen gas has two hydrogen atom in its molecule

Hydrogen gas is a colorless gas.

5) Sucrose is an organic molecule made up of three different atoms

:carbon, oxygen, hydrogen.

Sucrose is termed as table sugar which tastes sweet to our tongue.

6) Table salt is compound made up of two atoms of sodium and chlorine.

Table salt is white in color.

7) Mercury has melting point of -38.83 °C

Mercury is liquid at room temperature.

8) Gold has an atomic mass of 198.97 g/mol.

Gold is shinny hard metal.

9) Air contains 78% of nitrogen , 21 % of oxygen and 1 % of other gases.

Air is a colorless mixture of gases which are the integral of the Earth planet.

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Answer is 74,844 calories

8 0
2 years ago
Write down the dissolution equation for rubidium chromate dissolving in water. (Chromate is a polyatomic ion with the formula Cr
ycow [4]

Answer:

Four moles of the cation

Explanation:

2Rb2CrO4(s)<--------> 4Rb^+(aq) + 2CrO4^2-(aq)

Now looking at the reaction equation, it can be seen that one mole of rubidium chromate contains two moles of rubidium ions and one mole of chromate ions.

The dissolution of two moles of rubidium chromate should then yield four moles of rubidium ions and two moles of chromate ions since the ratio of ions present is 2:1.

This explains the reaction equation written above for the dissolution of two moles of rubidium chromate as shown.

5 0
2 years ago
When iron pyrite (FeS2) is heated in air, the process known as "roasting" forms sulfur dioxide and iron(III) oxide. When the equ
Ronch [10]

Answer:

The coefficient of O2 is 11

Explanation:

Step 1:

The equation for the reaction:

FeS2 + O2 → SO2 + Fe2O3

Step 2:

Balancing the equation. The equation can be balance as follow:

FeS2 + O2 → SO2 + Fe2O3

There are 2 atoms of Fe on the right side and 1 atom on the left. It can be balance by putting 2 in front of FeS2 as shown below:

2FeS2 + O2 → SO2 + Fe2O3

There are 4 atoms of S on the left side and 1 atom on the right side. It can be balance by putting 4 in front of SO2 as shown below:

2FeS2 + O2 → 4SO2 + Fe2O3

Now, there are a total of 11 atoms of O on the right side and 2 atoms on the left side. It can be balance by putting 11/2 in front of O2 as shown below:

2FeS2 + 11/2O2 → 4SO2 + Fe2O3

Multiply through by 2 to clear the fraction as shown below:

4FeS2 + 11O2 → 8SO2 + 2Fe2O3

Now the equation is balanced.

The coefficient of O2 is 11

8 0
2 years ago
A solid sample of a compound and a liquid sample of the same compound are each tested for electrical conductivity. which test co
marshall27 [118]
If these are you choices: 
(1)  Both the solid and the liquid are good conductors.

(2)  Both the solid and the liquid are poor conductors.

(3)  The solid is a good conductor, and the liquid is a poor conductor.

(4)  The solid is a poor conductor, and the liquid is a good conductor. 

 Then the answer is number 4. This is because ionic compound conducts electricity when it is dissolved in water.

8 0
2 years ago
Apumpis used toraisethe pressure of a fluid, and it operatesby converting the mechanical shaft work to mechanicalenergyof the fl
Ksivusya [100]

Answer:

maximum possible volume flow rate = V = 0.5m^3/s

Explanation:

Given power consumed = 3.5kW

pressure difference ( delta -P) = 7kPa

let maximum possible volume flow rate = V

The rate of flow of work = W = V x Delta -P

hence, V = W/delta P

V = 3.5/7

V = 0.5m^3/s

6 0
2 years ago
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