Explain how cobalt-60 and cobalt - 59 can be the same element but have different mass numbers

What is a base used in toothpaste sorbitol carrageenan magnesium hydroxide sodium lauryl sulfate

How many milliliters of 2.0 M NaCl solution would you need to make 250 ml of 0.15 M solution

How many moles of Ne gas will occupy 40.0 L of space at STP

What's the mass of 0.75 moles of CO2? (Show the equation and your working)

What are structure for each of the compounds listed. Explain why the name given is incorrect. And give a correct name in each case (1) 1-methylbutane (2) 1,1,3-trimethylhexane (3) 5octyne (4) 2-ethyl-1-propanol (5) 2,2-dimethyl1-3-butanol

An electron in a sodium atom moves from the third shell to the fourth shell. This change is a result of the atom (1) absorbing energy (3) gaining an electron (2) releasing energy (4) losing an electron

Which of the following best describes how erosion by groundwater might create a landform? A. Slightly acidic water dissolves Serbian rocks underground to form a cavern B.

What is this mass in pounds? (1lb=453.6g)

What is a cathode? A. The electrode that releases ions into the solution B. The electrode at which a reduction reaction occurs C. The electrode that is oxidized in a redox reaction D. The electrode that donates electrons to the system

Air is about 78.0% nitrogen molecules and 21.0% oxygen molecules. Several other gases make up the remaining 1% of air molecules. What is the partial pressure of the other gases in air (excluding oxygen and nitrogen) at an atmospheric pressure of 0.