Which term names catalysts that speed up chemical reactions in the human body? A. hormones B. enzymes C. reactants D. products

What is hybridisation

The process of filtration was used to separate a sample into its components. What conclusion about the sample can be formed based on the technique used? It was a pure substance. It was a compound. It was a heterogeneous mixture.

5. How does the abundance of isotopes of an element relate to its average atomic mass?

Which group of elements on the periodic table can have more than one possible charge? noble gases alkali metals alkaline earth metals transition metals

Blank! An organism whose presence or absence reveals the environmental condition?

How many grams do 4.8 x 1026 atoms of silicon weigh? Answer in units of g.

How many colors would you see if you were analyzing a pure substance through chromatography?

An ordered list of chemical substances is shown. Chemical Substances 1 CuO 2 O2 3 CO2 4 NO2 5 Fe 6 H2O Which substances in the list can be some of the reactants and products in the same combustion reaction?

Calculate percent composition of a compound that forms when 222.6g n combines 77.4g o

Why is gas chromatography used over paper chromatography, what can gas chromatography do that paper chromatography cant? Which phase does the carrier gas represent? Why use a syringe to deliver your samples?