A chemist weighed out 101. g of beryllium Calculate the number of moles of beryllium she weighed out. Be sure your answer has the correct number of significant digits. square

How is Avogadro's number related to the numbers on the periodic table? The masses are all divisible by Avogadro's number which gives you the weight of one mole. The atomic mass listed is the mass of Avogadro's number's worth of atoms. The periodic table tells you the mass of one atom. From that,and Avogadro's number you know the number of moles. The periodic table only gives us atomic numbers not atomic mass. The mass listed is Avogadro's number.

Which is an lonic solid? Multiple Choice KCI Cu $SiO_{2}$ rubber

A gaseous form of any substance that is solid or liquid when at normal room temperature is known as a/an: gas mist vapor fume

Based on the activity series provided, which reactants will form products? $F\gt Cl\gt Br\gt I$ $Cu_{2}+Br_{2}\rightarrow $ $Cl_{2}+AlF_{3}\rightarrow $ $Br_{2}+NaCl\rightarrow $ $CuF_{2}+I_{2}\rightarrow $

Intermolecular forces hold atoms and molecules in place in a solid. True False

What did Boyle discover about fire? It transforms one chemical into another. It creates good conditions for chemical experiments. It needs air to exist. Its temperature is determined by the substances being burned.

For the reaction: $P_{4}(s)+3H_{2}O(l)\rightleftharpoons 2PH_{3}(g)+P_{2}O_{3}(g)$ At equilibrium, the reaction contains concentrations of: $P_{4}=1.20M$ $H_{2}O=4.50M$ $PH_{3}=3.50M$ $P_{2}O_{3}=1.50M$ Determine the value of the equilibrium constant K Answer

Outer electrons are referred to as __ electrons. scatter free roaming target

Phosphorus reacts with iodine as shown in the chemical reaction below.What is the percent yield of the reaction if 28.2 g $Pl_{3}$ is obtained from the reaction of 48.0 g of 12 with excess phosphorus? $2P(s)+3I_{2}(s)\rightarrow 2PI_{3}(s)$ 51.7 g 51.48 51.5 g None of the above 51.98

Select the pair that has the larger atom or ion listed first. $Br^{-},Se^{2-}$ $S,S^{2-}$ $Cl,Cl^{-}$ $F^{-},Ne$ $P,P^{3-}$