Which value is equivalent to 7.2 kilograms? 720 grams 7,200 grams 72,000 grams 720 milligrams 7,200 milligrams

The value equivalent to 7.2 kilograms is 7,200 grams.

Explanation:

The kilogram has been the international standard unit for mass since 1901 and is therefore one of the seven basic units of the International System of Units. It is composed of a thousand grams and a million milligrams. Therefore, to know which is the correct value, we have to multiply 7.2 x 1,000 to know the value in grams, and 7.2 x 1,000,000 to know the value in milligrams.

7.2 x 1,000= 7,200 grams

7,2 x 1,000,000= 7,200,000 milligrams

As we can see, only 7,200 grams is the correct option.

b.

the accuracy of the data.

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.