The volume of a rock was determined by the displacment method to be 550 cm cubed. It has a mass of 55 g. Calculate the density of the rock.

What is the electron arrangement of bromine

Which element has the greatest density at STP? (1) magnesium (3) barium (2) beryllium (4) radium

GeF 3H is formed from GeH 4 and GeF 4 in the combination reaction: GeH 4 3GeF 4 4GeF 3H If the reaction yield is 92.6%, how many moles of GeF 4 are needed to produce 8.00 mol of GeF 3H

Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. Which of these is the best evidence that a chemical reaction occurs when coal burns? Select one: A new substance is produced.

Boron has an atomic mass of 11. How many neutrons are in its nucleus? Use the periodic table if you wish.

Famous New Zealand scientist Ernest Rutherford was awarded a Nobel Prize in which field?

Which molecules is amphoteric? A) NH4+ B) H2O C) H2CO3- D) H2SO4

Nickel (i) iodide reacts with chlorine to produce?

What are some examples of not all liquid's evaporating at the same rate?

Suppose you went bowling, but instead of a bowling ball you rolled a ping pong ball down the alley. What do you think would happen?