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scZoUnD [109]
3 years ago
10

Which statement below describes a physical property of a substance?

Chemistry
2 answers:
Rama09 [41]3 years ago
8 0

Answer:

A

Explanation:

levacccp [35]3 years ago
6 0

Answer:

A

Explanation:

Because density is a physical property and the rest are all chemical properties

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Methane and oxygen react to form carbon dioxide and water. what mass of water is formed if 3.2 g of methane react with 12.8 g of
inn [45]
<span>7.2 g of water.
       
This is a simple matter of adding up the masses of the initial reactants and determining the mass of the results. You started with 3.2 g of methane and 12.8 g of oxygen. So the total mass you start with is 3.2 + 12.8 = 16.0 grams. The reaction results in water and carbon dioxide. The mass of the carbon dioxide is 8.8 g, so the mass of the water will be 16.0 - 8.8 = 7.2 g.</span>
8 0
3 years ago
Which of the following is the electrical charge on an atom that contains 6 electrons, 3 neutrons, and 4 protons?
Y_Kistochka [10]

Answer:

Its electrical charge is -2.

4 0
3 years ago
What is the difference between a diatomic molecue and a normal molecue
Mekhanik [1.2K]

If a diatomic molecule consists of two atoms of the same element, such as hydrogen (H2) or oxygen (O2), then it is said to be homonuclear. Otherwise, if a diatomic molecule consists of two different atoms, such as carbon monoxide (CO) or nitric oxide (NO), the molecule is said to be heteronuclear.

7 0
4 years ago
How many moles of hexane (C6H14) must burn to form 18.4 mol of carbon dioxide?
avanturin [10]
The combustion reaction of hexane:

2 C6H14 + 19 O2 = 12 CO2 + 14 H2O

2 mol C6H14 ---------> 12 mol CO2
x mol C6H14 ---------> 18.4 mol CO2

12 * x = 18.4 * 2

12 x = 36.8

x = 36.8 / 12

x = 3.067 moles of CO2

hope this helps!.
3 0
3 years ago
Read 2 more answers
A technician prepared a solution by heating 100 milliliters of distilled water while adding KCl crystals until no more KCl would
almond37 [142]

Answer:

At lower temperatures the solubility of the KCl decreased and recrystallization occurred

Explanation:

Solubility refers to the amount of solute that dissolves in one litre of water at a particular temperature. Solubility is a property referring to the ability for a given substance, the solute, to dissolve in a solvent. It is measured in terms of the maximum amount of solute dissolved in a solvent at equilibrium. The resulting solution is called a saturated solution.

Solubility is dependent on temperature. This is the reason why we must state the particular temperature at which a given solubility data was collected. Above or below the quoted temperature, the solubility data may no longer be accurate.

Let's return to the question, at elevated temperatures, we can see that the KCl is very soluble in water as evidenced by the clear solution obtained at high temperature. However, as the temperature decreases, the solubility of KCl also decreases accordingly and recrystallization of the solute occurred hence the formation of a cloudy solution and the settling of some solid at the bottom of the flask.

6 0
4 years ago
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