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Alex_Xolod [135]
3 years ago
7

Samuel adds a teaspoon of salt to a glass of water. He notices that the salt disappears. Samuel takes a sip to discover that the

water tastes salty. What kind of change has occurred?
A.
It’s a chemical reaction because a new substance has formed.
B.
It’s a physical change because the water and the salt kept their original properties.
C.
It’s an example of synthesis because two substances reacted to give one substance.
D.
It’s a chemical reaction because the water now tastes salty but originally did not.
Chemistry
2 answers:
jeyben [28]3 years ago
7 0

Answer:a

Explanation:It’s a chemical reaction because a new substance has formed.

Vera_Pavlovna [14]3 years ago
4 0

Answer:

B

Explanation:

B It’s a physical change because the water and the salt kept their original properties.

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Determine the type of reaction for the following equation:<br> C2H6 + O2à H2O + CO2
valkas [14]

Answer:

The type of reaction for the following equation is combustion equation.

Explanation:

Combustion reaction is defined as the chemical reaction in which a hydrocarbon reacts with oxygen gas to produce carbon dioxide gas and water molecule.

\text{hydrocarbon}+O_2\rightarrow CO_2+H_2O

The reaction given to us:

C_2H_6 + \frac{7}{2}O_2\rightarrow 3H_2O + 2CO_2

When 1 mole of ethane reacts with 7/2 moles of oxygen gas it gives 3 moles of water and 2 moles of carbon dioxide gas.

The type of reaction for the following equation is combustion equation.

4 0
3 years ago
silicon, tin, and lead are all in the same group. the density of tin is about 7.28 g/cm3 and the density of lead is about 11.34
Sophie [7]

The atom's radius and mass increase from top to bottom. The density of elements from top to bottom also increases in a periodic table.

Density of Sn= Mass of Sn/Volume of Sn

                     =24.3968/7.28

                     =3.49 g/ml*ml/cm³

                     =3.49 g/cm³

It is accurate to assume that the density of Sn will fall between that of Si and lead .  the mass number and radius of the atoms increase from group to group as we move from top to bottom in a periodic table.. The density rises because the increase in mass number is greater than the increase in radius. Simply multiplying by the molar mass of the gas  allows one to derive the formula for mass density from the formula for number density. Do not forget that the mass is equal to the moles (n) times the molar mass (M).  Smaller masses can be measured in grams instead of kilograms (kg), which is the standard SI unit for mass.

To learn more about density please visit:

brainly.com/question/406690

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7 0
1 year ago
Which is least likely to occur after an experiment i conducted to test a hypothesis?
Alenkinab [10]

Answer:

The hypothesis becomes a theory if the results support it is answer.

Explanation:

I hope it's helpful!

8 0
3 years ago
A benzene bonded side group is called?
hammer [34]
It is called a phenyl group
3 0
3 years ago
If you were given 10.0 mL of 2.0 M H3X, how many milliliters of 2.0 M NaOH would it take to completely neutralize the acid?
Shtirlitz [24]
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<span>2.0 x Ans = 30.0 x 0.5 </span>

<span>Ans = 7.5 mL</span>
4 0
3 years ago
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