Which equation represents a nuclear reaction that an example of an artificial transmutation?
1) 43/21 sc--> 43/20 ca + 0/+1 e
2) 14/7 n + 4/2 he --> 17/8 o + 1/1 h
3) 10/4be--> 10/5b+0/-1e
4) 14/6c--> 14/7n+0/-1e

Nitrogen (n), phosphorus (p), and potassium (k) are the main nutrients in plant fertilizers. according to an industry convention, the numbers on the label refer to the mass percents of n, p2o5, and k2o, in that order. calculate the n: p: k ratio of a 30: 10: 10 fertilizer in terms of moles of each element, and express it as x: y: 1.0.

When 225mg of anthracene, c14h10(s), was burned in a bomb calorimeter the temperature rose by 1.75k. calculate the calorimeter constant. by how much will the temperature rise when 125mg of phenol, c6h5oh(s), is burned in the calorimeter under the same conditions? (δch< (c14h10,s)=–7061 kj mol−1.)

Particles vibrate in a rigid structure and do not move relative to their neighbors.