Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions. The “ingredients” of a reaction are called reactants, and the end results are called products.
The answer is 1.88·10^-3 mg.
Here is the full question with choices: When hydrogen is attached to the more highly electronegative oxygen atom in a water molecule, __________.?
A. the hydrogen atom becomes partially positive
B. the electronegative atom becomes strongly positive
C. the hydrogen atom becomes partially negative
D. the oxygen atom becomes partially negative
The answers are A and D. The oxygen holds onto the electrons more of the time so is slightly negative, making H slightly positive and thus making a polar covalent bond.
It's a piece of glassware used for handling liquids, usually in a laboratory,
although I use one as a coffee cup.
They have markings on the side, like a kitchen measuring cup, so you can
measure different amounts of liquid, and they have a lip for pouring.
They're also usually made of a special type of glass (borosilicate) so that
they won't crack when very hot liquids are poured in.
Here's a picture of a beaker with 200 milliliters of some blue stuff in it.