Marco wants to investigate the chemical properties of sodium bicarbonate, or baking soda. He plans to carry out the tests below. Test 1: Mix a teaspoon of sodium bicarbonate into a cup of warm water to see if it dissolves. Test 2: Mix a teaspoon of sodium bicarbonate into a cup of vinegar to see if it fizzes. Test 3: Heat a teaspoon of sodium bicarbonate in the oven to see if its melting point is less than 400 degrees Fahrenheit. Which statement provides the best assessment of his tests?

Test 2: Mix a teaspoon of sodium bicarbonate into a cup of vinegar to see if it fizzes.

Explanation:

The statement that provides the best assessment would be the test in which a teaspoon mix of the substance with vinegar is tested for fizzleness.

The test was an investigation of the chemical test of the compound. By definition, a chemical test is one in which a qualitative or quantitative procedure is used to identify, characterize, or quantify a chemical group.

In this case, a mix of sodium carbonate and vinegar will produce a fizzle of carbon dioxide gas. This is a characteristic test for compounds with carbonates. The equation is as below:

a. population growth is decreasing

-2

+4

-10

-3

-8

-3

so the population decreased by 24 because 3+3+8+10+2=26-2=24.

hoped i !

explanation:

on island x the species needed to adapt because they were being subject to predators which didn't inhabit island y.