2. Which minerals contain the two most abundant elements by mass in Earths

a. Fluorite and calcite

b. magnetite and pyrite

c. amphibole and quartz

d. galena and sulfur

Write an algebraic expression to repro 1.4 times a number, increased by 7

An atom of nitrogen has several protons in its nucleus. How many electrons does it have

3. The formula for table salt is NaCl. Is table salt ionic or covalent? Explain

What substances conducted heat the best?

What are the indicators for determining acids?

What changes do you shown in the model

Select all the correct answers. What are the products of the acid-base reaction between HClO3 and LiOH? LiClO4 H2O LiH LiClO3 HClO4

Under what conditions will light bend? a) Never b) When it slows down while going through space c) When it speeds up while going through space d) When it passes from one medium to another

Cells can manipulate the free energy of reactions by: (Select all that apply) Changing the concentrations of products and reactants Changing the concentration of the enzyme involved in the reaction Using enzymes A.

NH3 is an example of A. an element. B. an atom. C. a mixture. D. a compound.