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vredina [299]
3 years ago
6

What is a chemical change?

Chemistry
1 answer:
iris [78.8K]3 years ago
4 0

Answer:

D. A reaction or change in a substance that results in a different substance

Explanation:

Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances.

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How should you add metal to the graduated cylinder so that it will not crack the glass at the bottom?
ella [17]

Answer:

you tilt the cylinder at a slight angle so that the metal slides down the sides, rather than drops all it`s weight to the bottom

5 0
3 years ago
Which of the following equations has correct formulas and also is a balanced equation?
aliya0001 [1]

Answer : The correct option is, (B)

Explanation :

Balance equation : Balanced equation are those equation in which the number of atoms of each element and the total charge must be same on products side and reactants side.

In the given options, only option (B) equation has correct formula and also a balanced equation.

2Be+O_2\rightarrow 2BeO

while the other options has incorrect formulas and also an unbalanced equations.

The correct equation for option A is, CaCO_3\rightarrow CaO+CO_2

The correct equation for option C is, 2Mg+O_2\rightarrow 2MgO

The correct equation for option D is, KCl+HNO_3\rightarrow HCl+KNO_3

Hence, the correct answer is, (B) 2Be+O_2\rightarrow 2BeO

5 0
3 years ago
Which of the following tools is not used for measurement?
Verdich [7]

Answer:

tape measure

Explanation:

I am helping

8 0
3 years ago
In Balancing Equations, why do I put a 3 before reactant H?
Katena32 [7]
You have 3 (h2(so4)) on the reactants side so you need to have 6 total hydrogen’s on the products side. Therefore 3(h2) is required.
5 0
3 years ago
What happens when water is added to quicklime? Write two observations.
Neporo4naja [7]

Answer:

1.Most metal oxides are insoluble in water but some of these (e.g. Na2O.

Explanation:

2.: (i) A hissing sound is observed.

1.ii) The mixture starts boiling and lime water is obtained.

3 0
3 years ago
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