B) a molecule
A molecule is formed when two atoms join together with a covalent bond.
At STP, P = 1 atm, and T = 0 C
Thus, PV = nRT => V = nR(273). We will use this later...
if you have 35.4 Ca, and the molar mass of Ca is 40.08, you get .883 moles Ca. Thus, since it takes 2 moles of Ca to form a reaction, you only need half the moles of Ca of O2. Thus, n(O2) = .883/2
Tie this back to the first equation and you get
V = .442 * <span>0.082057(which is R) * 273 = 9.9 L</span>
Well , it can be a lot of things. stimulus slow down the body . so it may be a, c, d
The yield of ammonia rises as reaction pressure is raised. The yield of ammonia in the reaction actually declines as reaction temperature rises.
<h3 /><h3>What is ammonia ?</h3>
Ammonia, the simplest pnictogen hydride and a stable binary hydride, is a colorless gas with a strong, pungent odor. It contributes considerably to the nutritional demands of terrestrial creatures by serving as a precursor to 45 percent of the world's food and fertilizers. Biologically, it is a common nitrogenous waste, especially among aquatic animals. About 70% of ammonia is used to create fertilizers, including urea and diammonium phosphate, in a variety of shapes and compositions. Additionally, pure ammonia is sprayed straight onto the ground.
To learn more about ammonia from the given link:
brainly.com/question/12276882
#SPJ4