Which of these equations is balanced? a. 3 H2SO4 + 2Al → Al2 (SO4) 3 + 3H2 b. 2KCl + Pb (NO3) 2 → KNO3 + PbCl2 a b a and b neither

Which of these is an example of pseudoscience? A) predicting the time of sunrise based on data on position of Earth B) predicting the date of the moon phases based on data on position of Earth C) predicting eclipses based on the position of the sun

Which element (s) is/are not balanced in this equation? MgO + 2 LiCl - - > MgCl2 + Li2O

A flask contains a mixture of N2 and O2 at STP. If the partial pressure exerted by the N2 is 40.0 kPa, the partial pressure of O2 is?

Which of the following will most likely happen if the pancreas does not produce sufficient glucagon? 1. Blood sugar will decrease because glucagon increases blood sugar when it falls too low. 2.

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

Explain what a alloy is and how the atomic structure of the alloy can make it stronger

Liz is examing a plant cell under a Microscope she seems many small green oranganelles inside the cell

Four different methods are described for validating the results of a particular analysis. Indicate for each whether the method primarily checks the accuracy of the analysis or the precision of the analysis. a.

How does the molar entropy of a substance change with increasing temperature

Compare the discoveries of Henri Becquerel with the discoveries of Marie Curie