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frez [133]
3 years ago
10

1. Which one of the following is not a step used for balancing chemical equations? A. Always change subscripts to balance an equ

ation B. Write the chemical equation using formulas and symbols C. Count the atoms in each substance in the reactants and products D. Choose coefficients that will balance the equation
Chemistry
1 answer:
zysi [14]3 years ago
3 0

Answer:

B. Write the chemical equation using formulas and symbols

Explanation:

When balancing a chemical equation, the formulas and symbols of the reactants and products are already given and it is not necessary to modify them.

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A car at rest ends accelerates for 12 seconds. After this time the car is going 36 m/s. What was its acceleration?
Zigmanuir [339]

Acceleration is defined as velocity per unit time.

Acceleration=\frac{Velocity}{time}

a=\frac{dv}{dt}

Here, a=acceleartion,

v=velocity=36 m/s

t=time=12 s

a=\frac{dv}{dt}

a=\frac{36}{12}

a=3 ms⁻²

A car at rest ends accelerates for 12 seconds. After this time the car is going 36 m/s. So acceleration that is a=3 ms⁻².


4 0
3 years ago
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Which type of property can be observed only by changing a substance into a different substance?
Svetradugi [14.3K]

Answer: chemical property.


Explanation:


The chemical properties are the capacity or incapacity of a substance to transform into one or more different substance either by reacting with one or more different substances or by decomposition.


Such properties can only be observed when such change (reaction) takes place and the substance, therefore, is transformed into one or more different substances.


On the other hand, the physicial properties can be observed or measured without changing the composition of the sample.

4 0
4 years ago
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