What is the energy of a wave with a frequency of 8.0x1014 Hz. Round your answer to 2 sig figs. E = hf (h = 6.63 x 10^-34)
A. 5.3x10-19 J
B. 5.30x1019 J
C. 3.75x107J
D. 2.49x1040 J
I need help with this, someone

How does litmus paper indicate an acid?

3.09 lab: reaction of metals 1 which combinations of substances resulted in a chemical change? for each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. make a general statement about the reactivity of the metals in this experiment.

Detrimental the length of the object shown 1. 97.8mm 2. 97.80 mm 3. 97mm 4. 98mm