When mixed with equal volumes, which of the following solutions would function as an effective pH buffer? a. 0.250 MNaCl and 0.250 MHCI
b. 0.250 MNaClO and 0.250 MHCIO
c. 0.250 MNaOH and 0.250 MHCI
d. 0.250 MNH4Cl and 0.250 MNH3
e. 0.250 MHN03 and 0.250 MNaNO3

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

Achemistry student weighs out 0.306 g of citric acid (h3c6h5o7), a triprotic acid, into a 250 ml volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with 0.1000 m naoh solution. calculate the volume of naoh solution the student will need to add to reach the final equivalence point. be sure your answer has the correct number of significant digits.

1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6