The only definite evidence of a chemical reaction is

A) The production of new substances

B) Changes in phase

C) Formation of a gas

D) A color change

Give me a paragraph about the sun

A scientist took a sample of enzymes from cow saliva and mixed them with a form of starch found in grains. After a while the starch broke into many smaller molecules. This shows that Question 2 options: cows should not be fed grains.

Which actions are part of the process of scientific inquiry? Check all that apply

Spectral lines produced from the radiant energy emitted from excited atoms are thought to be due to the movements of electrons

You have a 28.2-g sample of a metal heated to 95.2°c. you drop it in a calorimeter with 100. g of water at 25.1°c. the final temperature of the water is 31.0°c.

Sara and Sam went for a two-hour drive. According to the graph, between. 75 hours and 1.25 hours into their trip, they A) slowed down to a speed of 15km/hour. B) travelled at a constant rate of 30km/hour.

Define the following terms: acids, bases, oxoacids, oxoanions, and hydrates.

Calculate the concentration of a solution that has 6.7 moles in a volume of 0.6 liters.

Is sidewalk cement an element or a compound?

1.4 Explain why it is important to support individuals to challenge information about services that may present a barrier to participation