How would I solve this problem?

15 = 10z/[2 - (5x4) ]

What is the Noble gas notation of sulfur (S) ?

Food can spoil through mere exposure to air because it will lose electrons. This loss of electrons creates free radicals, which destroy chemical bonds in the food, causing it to spoil. What is this process called?

How do you get rid of a splinter?

Looking at group 2A of the periodic table, which of these element probably has the lowest ionic radius?

Which statement about ribosomes is correct? Prokaryotic ribosomes are larger than eukaryotic ribosomes. Prokaryotic ribosomes are smaller than eukaryotic ribosomes. Prokaryotic and eukaryotic ribosomes are same in size.

Does it require more energy to melt an ionic compound or dissolve it in water? It requires much more energy to melt it. It takes about the same amount of energy. It requires much more energy to dissolve it. Ionic compounds are insoluble in water.

Which element has an ion that is smaller than an ion calcium? Potassium, strontium, cesium, magnesium

A peregrine falcon can travel 537,600 furlong/fortnight. A race car travels 212ft/s. A spider can jump with a maximum velocity of 9,000,000 cm/hr. Which travels the fastest?

how many energy levels (shells) does an atom of oxygen have? How do you know this by looking at the periodic table?

A student needs to use 0.575 moles of sodium chloride in an experiment. How many grams should he mass out?