Question 1: Express the following out of scientific
1 answer:
Expanding the following out of scientific notation gives:
1. 1.5× cm= 15000cm
2. 2.7× cm= 0.0027cm
Numbers that are either too large or too little to be conveniently stated in decimal form can be expressed using scientific notation. It is also known as standard form in the UK and scientific form, standard index form, and standard form.
Using scientific notation, one can express extremely big or extremely small values. When a number between 1 and 10 is multiplied by a power of 10, the result is represented in scientific notation.
So, the expanded forms are;
1. 1.5× cm= 15000cm
2. 2.7× cm= 0.0027cm
Learn more about scientific notation here;
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Answer:
The activation energy of an endothermic reaction
A) must be greater than the required △H
Explanation:
endothermic reaction : Are those which absorbs heat from the surrounding
.<em>This energy provide activation energy for the reaction to occur</em>.
So activation energy becomes more than enthalpy.
2M
Explanation:
Given that:
V1 = 50mL
M1 = 40M
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unknown:
M2 = ?
Solution:
Concentration is the number of moles solute in a solution.
Since the number of moles in the solute remains the same;
Concentration =
number of moles = concentration x volume
Number of moles before and after the dilution remains the same;
M1 x V1 = M2 x V2
M1 is initial concentration
V1 is initial volume
M2 is final concentration
V2 is final volume
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Molarity brainly.com/question/9324116
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