Which of the following elements would be considered a nonmetal?

fluorine (#9)

silicon (#14)

cobalt (#27)

sodium (#11)

Consider the following elementary steps that make up the mechanism of a certain reaction: 3X→E+F E+M→F+N Part A What is the overall reaction? Express your answer as a chemical equation.

List a homogeneous material that is not a pure substance

Which unit would be used to measure the amount of matter in an object?

Which statement best describes an electron 1) it has a smaller mass than a proton and a negative charge 2) it has a smaller mass than a proton and a positive charge 3) it has a greater mass than a proton and a negative charge 4) it has a greater

How many grams of hydrogen peroxide (H2O2) must be added to 1,500 mL of water to produce a concentration of 1.33 m (molal solution) ? (Recall that the density of water is 1.0 gram/mL.)

Which of the following is the correct name for the compound hgs? mercury sulfide mercury (i) sulfide mercury (ii) sulfide mercury monosulfide?

Which of these has the most impact on the apparent brightness of a star seen from Earth? Gravitational pull, temperature of star, distance from earth, earths orbital pattern

What are 6 abiotic factos from finding nemo?

Which of the following is an element? a. carbon monoxide gas (co) b. magnesium chloride salt (mgcl) c. hydrochloric acid (hcl) d. zinc metal (zn)

Describe the formation of an aqueous KI solution when KI dissolves in water