What has to do with the closeness of a measurement to the true value?

Which is the molar mass of BF3? 10.81 g/mol 29.81 g/mol 48.81 g/mol 67.81 g/mol

What information is given by the superscripts in an electron configuration?

CCl2F2 (g) + 4H2 (g) → CH2F2 (g) + 2HCl (g) What volume of hydrogen at 225atm and 33,5 °C would be required to react with 1 ton of CCl2F2?

The chemical formula for aluminum hydroxide is Al (Oh) 3. How many hydrogen atoms are present in 1 molecule here?

Which is not part of the first law of thermodynamics? A. Energy cannot be created or destroyed. B. The total amount of energy in the universe is constant. C. Energy can change forms. D. The universe is always slowly gaining energy

What is the change in heat energy when 132g of copper at 32.2°C is raised to 45.0oC? The specific heat of copper is 0.385 J/g °C.

Polar covalent bonds are formed when the electrons in the bond are not shared equally between the two nuclei. which one of these molecules contains polar bonds?

The flame from my candle gives off black smoke heat and light what type of changes do these indicate

Which one of the following processes results in a decrease in the number of neutrons? corrosion electron capture gamma emission positron emission alpha emission

Calculate the root mean square velocity of F2, Cl2, and Br2 at 304 K.