The chemical equation below shows the burning of magnesium (mg) with oxygen (o2) to form magnesium oxide (mgo). 2mg + o2 mc019-1.jpg 2mgo niven wants to calculate the mass of mgo that is produced by the burning of 28.0 g of mg. what is the first step in niven’s calculation? balance the chemical equation. convert grams of mg to moles. determine whether heat is given off by this reaction. find the number of mg atoms in the sample. the answer is b. convert grams of mg to moles.

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?

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

Which substance is a steroid? cholesterol fatty acid monosaccharide trans fat