Here’s a
the relative formula mass of a compound is the sum of the relative atomic
masses of the atoms in the numbers shown in the formula. use the a, values
given at the start of this activity to calculate the m, of the following substances:
1) н2
2) co2
3) h20
4) nh3
5) ch4
6)naoh
7)h2so4
8)na2co3
9)mg(no3)2

Part of molten rock at mid-ocean ridges

The reaction q+r2=r2q is found to be first order in r2 and

Select the correct answer from each drop-down menu.describe what happens to a carbon-11 atom when it undergoes positron emission.the decay of a carbon-11 atom _1_, and this causes it to emit _2_.options for 1: > changes a neutron into a proton> changes a proton into a neutron> is hit with a neutron> reconfigures its protons and neutronsoptions for 2: > a negatively charged electron-sized particle> a positively charged election-sized particle> two atoms and several neutrons> two neutrons and two protons