Atoms of which two elements in the ground state contain the same number of valence electrons

A - al & si

B - al & b

C - al & zn

D - al & ge

A calorimeter is used in an experiment. The initial temperature of the system was found to be 32 degrees Celsius. The final temperature was found to be 48 degrees Celsius.

Which correctly defines molar volume of an ideal gas? the volume that is occupied by 1 mol of an ideal gas at stp, which is 22.4 l the volume that is occupied by 1 mol of an ideal gas at stp, which is 1.0 l the volume that is occupied by 22.

What does the questions "how much?" and "how many?" have in common?

Sandstone is a sedimentary rock. Which processes cause sand particles to form sandstone? Check all that apply. cementation compaction cooling erosion heating

Chemistry how do you count atoms? 4 HNO3

Methane (ch4) and the perchlorate ion (clo-4) are both described as tetrahedral. what does this indicate about their bond angles?

How many moles are contained in each number of grams of table sugar (c12h22o11, molar mass 342.3 g/mol) ?

6. Which atomic particle has a positive (+) charge?

One reason ionic compounds do not dissolve well in nonpolar solvents is that ___. a. ion-solvent interactions are not strong enough to solvate the ions in solution. b.

Muscles undergo fermentation when no carbon dioxide is available. no oxygen is available. no pyruvate is available. no water is available. no atp is available.