how many electrons does nitrogen gain in order to achieve a noble-gas electron configuration? is it 4?
Nope, it's 3. Looking across period 2, you can see that Nitrogen has 5 valence electrons. It wants 8. 8-5=3.
Thanxs. How many significant figures are in the measurement 811.40 grams?
Five. Here is a good site for s.f.
http://science.widener.edu/svb/tutorial/sigfigures.html
how many significant figures are in 811.40
convert the rate 60m/s to units of km/hr?
To convert from meters per second (m/s) to kilometers per hour (km/hr), you need to use conversion factors.
First, note that there are 1000 meters in a kilometer, and 3600 seconds in an hour.
So, to convert 60 m/s to km/hr:
1. Multiply by the conversion factor of 1 kilometer/1000 meters:
60 m/s * (1 km/1000 m) = 0.06 km/s
2. Multiply by the conversion factor of 3600 seconds/1 hour:
(0.06 km/s) * (3600 s/1 hr) = 216 km/hr
Therefore, the conversion of 60 m/s to km/hr is 216 km/hr.