CaCN2 + 3H20 - CaCO3 + 2NH3 What is the percent yield if 15.5 g of NH3
is produced upon reaction of 65.5 g of CaCN2
and 451 g of water? The molar mass of CaCN2
is 80.11 g/mol and the molar mass of CaCO3
is 100.09 g/mol.
1. 1.79%
2. 14.5 %
3. 69.7 %
4. 89.75 %
5. 27.8 %
6. 55.8%
7. 80.15 %

What provides structure to the human body?

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles