In some pine trees, long needles are dominant over short needles. which of the following statements is true?

1.) a pine tree with long needles must be homozygous dominant

2.) a pine needle with short needles must be heterozygous recessive

3.) a hybrid pine tree will have the same phenotype as a homozygous dominant pine tree

4.) a hybrid pine tree will have the same genotype as a homozygous recessive pine tree

n+h→nh3

we must remember that nitrogen and hydrogen are both diatomic molecules in their standard gas form. this adjusts the equation to

n2+h2→nh3

now we need to adjust coefficients in order to balance the atoms on each side of the equation. currently we have 2 atoms of nitrogen and 2 atoms of hydrogen on the reactant side and 1 atom of nitrogen and 3 atoms of hydrogen on the product side.

we can balance the hydrogens by placing a coefficient of 2 in front of ammonia and a coefficient of 3 in front of the hydrogen.

n2+3h2→2nh3

this gives us 6 hydrogen on each side and coincidentally the nitrogens now equal 2 on each side.

the answer for sodium is 0.186

the answer for rubidium is 0.251