Chemistry, 01.10.2019 16:30 ayani144

Brie is studying the law of conservation of mass at school, so she decides to test it. first, she measures and records the mass of 1 teaspoon of baking soda and 1 tablespoon of vinegar. then, she combines the two substances and observes what happens. she notices that the mixture bubbles vigorously. after the mixture stops bubbling, she measures and records the mass of it. when she examines her data, she notices that the mass of the mixture is less than the mass of the vinegar and baking soda added together. brie is confused because it appears as if mass is not conserved.

which statement best explains why the mass of the reactants in brie's experiment was greater than the mass of the products?

a. some of the products from the experiment were spilled before their mass was determined.
b. some of the products formed from the experiment escaped to the surroundings as a gas.
c. some of the products from the experiment were destroyed by the vigorous bubbling.
d. some of the products formed from the experiment were lower in density.

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Answer from: yeetusbobeetus

B; Some of the products formed from the experiment escaped to the surroundings as gas.

Explanation:

We are given that Brie is Studying the law of conservation of mass at school , so she decides to test it.First , she measures and records the mass of 1 teaspoon of baking soda and 1 table spoon of vinegar .

We have to find best explains the mass of reactants in Brie's experiment was greater than the mass of products.

Then , she combines the two substances and observes

The chemical formula of baking soda is NaHCO_3 (Base)

The chemical formula of vinegar is CH_3COOH (Acid)

$NaHCO_3+CH_3COOH\rightarrow CH_3COONa+CO_2+H__2O$

CH_3COONa = Sodium Acetate (Salt)

H_2O=Liquid =Water

CO_2 =Carbon dioxide=Gas

When we combine 1 teaspoon sodium bicarbonate and 1 teaspoon vinegar

Then sodium acetate salt , water and gas carbon dioxide are formed.

she. notices that mixture bubbles of carbon dioxide. vigorously .After the mixture stops bubbling, she measures and records the mass of it .

When she examine her data , she notices that the mass of mixture is less than the mass of the vinegar and baking soda added together because carbon dioxide is a gas which escape into surrounding . Therefore, the mass of product decreases due to escaping of gas.

Brie, is confused because it appears as if mass not conserved.

The mass of reactants is greater than the mass of products due to escaping of gas into surrounding. So , the mass is not conserved in Brie's experiment.

B; Some of the products formed from the experiment escaped to the surroundings as gas.

Answer from: Quest

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation:

What do lines on a contour map indicate?

Answer from: Quest

Iwould you figure it out but you don't have a picture or in your question as to what the physical property you're looking for is

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