Sayid recorded the temperatures of four substances in a chart. which conclusion is best supported by the data?

A mixture was found to contain 1.05 g if silicone dioxide, 0.69 g cellulose, 1.82 g of calium carbonate. what percent of calcium carbonate is in thise mixture?

1. What is the difference between an open system, a closed system, and an isolated system? What can a chemist do to try to make a system as isolated as possible?

Human organ systems work together in many ways. Which statement accurately explains the relationship between two body systems? A. the excretory system regulates the temperature of the integumentary system. B.

Can someone reword this? A magnetic substance has magnetic fields. These fields start at the North Pole wrap around the magnet, and terminate at the south pole of the magnet. All magnetic substances have north and south poles

In a balanced chemical reaction, the total mass of the products always equals the Select one: a. proportional masses of the reactants. b. molar mass of the reactants. c. total mass of the reactants. d. atomic mass of the reactants.

In a laboratory, Carlos places one plate with grape jelly and another plate with cooked brown rice inside an ant farm. The next day, he finds that both plates are filled with ants.

Which statement is true at STP? (The atomic mass of Zn is 65.39 u.)

A sample of gas has a volume of 2.4 L and a pressure of 1.2 atm. What would the pressure of the same gas sample be if the volume is reduced to 1.8L at a constant temperature?

The elements most likely to form more than type of ion are the ... A. Transition metals B. alkali metals C. halogens D. alkaline earth metals

Mole-Mass Conversions How many moles in 28. o grams of Oxygen? What is the mass of 5.0 moles of Iron? Find the number of moles of argon in 452 g of argon. Find the grams in 16.5 mol of Hydrogen.