4. W 1. The purpose of studying the various
velocities and the distances of galaxies in
these studies was:
WC
A. To prove that galaxies were moving
B. To determine the Hubble constant
(H.) which helps determine the age
of the universe
C. To determine the size of a galaxy
which helps determine the Hubble
constant (H)
D. To determine the age of the universe
which helps determine the Hubble
constant (H.)

What’s the physical properties in calcium chloride

The chemical composition of soil varies with depth. an article in communications in soil science and plant analysis describes chemical analyses of soil taken from a farm in western australia. fifty specimens were each taken at depths 50 and 250 cm. at a depth of 50 cm, the average no3 concentration (in mg/l) was 88.5 with a standard deviation of 49.4. at a depth of 250 cm, the average concentration was 110.6 with a standard deviation of 51.5. find a 95% confidence interval for the difference in no3 concentrations at the two depths.

How many ammonium ions and how many sulfate ions are present in a 0.270 mol sample of ?