Which of the following materials is a metalloid or semi-metal (has some metallic properties and some properties similar to non-metals) ?

Group of answer choices

Na

silicon (Si)

NaCl

selenium (Se)

One half of a balanced chemical equation is shown. 3Mg (OH) 2 + 2H3PO4 Which lists the numbers of each atom the other half of the equation would contain? 3 Mg, 2 P, 14 O, 12 H Mg, 2 P, 14 O, 6 H 3 Mg, 8 P, 7 O, 6 H 6 Mg, 6 P, 2 O, 12

What is the value for the acceleration of gravity

The number of different bond angles for the most polar isomer of Pbr2F3 is? A. 7 B. 6 C. 5 D. 8

What is the molar mass of CaI2?

Diatomic O2 can react with the element magnesium to form magnesium oxide (MgO). The balanced chemical equation is: O2 + 2 Mg → 2 MgO If 97.

How many bromine atoms are present in 39.9 g of CH2Br2

Chemists use activity series to determine whether which type of reaction will occur?

1. Does the temperature rise or drop when you mix vinegar and baking soda. 2. Does the temperature rise or fall when you mix baking soda and water.

Use the balanced equation from number four above to determine the limiting reactant if we had a mixture of 5.0 moles of Fe and 4.0 moles of O2.

Using the kinetic theory what happens to oxygen particles as they are cooled