Each element has its own emission bright line spectrum pattern. True or false?

Studystack if a substance can be physically separated into its components, is it a pure substance or a mixture?

Which characteristic makes legumes a good food source for food-insecure populations? A) They are a source of starchy carbohydrates B) They are inexpensive to cultivate C) They are a source of fermented sugars D) They are bred over thousands of years

Which of these planets has the coldest surface temperature? Question 2 options: Earth Jupiter Mars Neptune

If I have 1.9 moles of gas held at a pressure of 4.95 atm and in a container with a volume of 5000.0 mL, what is the temperature of the gas?

What is it called when a consume wastes and dead organisms?

If the specific heat of copper is 0.711 J/g•°C, how much copper would it take if the heat given off is 54.85 calories and the temperature change is 205°C.

Why is it is difficult to compress a liquid? a. liquid takes the shape of its container. b. the liquid particles flow away when compressed. c. liquid becomes solid when compressed. d. the liquid particles are very close together.

A mixture of two compounds, a and b, was separated by extraction. after the compounds were dried, their masses were found to be: 105 mg of compound a and 91 mg of compound b. both compounds were recrystallized and weighed again.

What are the five types of chemical reactions?

Which chemical reaction do plants use to take carbon dioxide out of the air