Which of the following is an example of a pure substance?

A. air

B. salt water

C. granite

D. aluminum

How many moles are there in 78.3g of CO2?

Substances that transfer heat better than others are called

Which of the following was NOT among Democritus's ideas? Group of answer choices Atoms are indestructible. Atoms are indivisible. Atoms retain their identity in a chemical reaction. Matter consists of tiny particles called atoms.

The average time it takes for a molecule to diffuse a distance of x cm is given by t=x^2/2D where t is the time in seconds and D is the diffusion coefficient. Given that the diffusion coefficient of glucose is 5.

11. Many metals are described as ductile, which means they can be O mixed with other metals to form alloys O hammered into a shape O drawn into a wire O broken apart with a sharp blow

Explain, in terms of electrons, why the radius of a calcium ion is smaller than the radius of a calcium atom.

The silkworm feeds on what

For the reaction? Fe+? H2o ⇀↽? Fe3o4+? H2, a maximum of how many grams of fe3o4 could be formed from 354 g of fe and 839 g of h2o? Answer in units of g

Quicklime (CaO) is produced by the thermal decomposition of calcium carbonate (CaCO3). Calculate the volume of CO2 at STP produced from the decomposition of 152 g CaCO3 by the reaction. CaCO3 - > CaO + CO2

What is the nearest star in Gemini