Answer:
poH= -log(oh^-)
= - log (0.500* 10^-11)
= =- log 0.5 + log (10^-11)
= -( -0.30 +(-11))
=+ 11.3
It has more lines in it compared to hydrogen emission spectrum. It is mainly because the helium atom has more electrons than a hydrogen atom. Therefore, more electrons get excited when we pass a white light beam through a helium sample, and it causes the emission of more spectral lines
Answer:
94.3 grams
Explanation:
MW of C2HF3O2 is 114g/mol
MW of oxygen in C2HF3O2 is 32g/mol
% composition of oxygen in C2HF3O2 = 32/114 × 100 = 28.1%
Mass of oxygen = 26.5 grams
Mass of trifluoroacetic acid = 26.5/0.281 = 94.3 grams
Answer:
d) the signals must be changed to another form at ground stations to travel through space.
Explanation:
Spacecraft use transmitters to communicate with people on Earth. This are sent in the form of signals.
Answer:
Hi
Explanation:
Decomposition reactions are really the opposite of combination reactions. In decomposition reactions, a single compound breaks down into two or more simpler substances (elements and/or compounds).