Which of the following elements does not form hydride by direct heating with hydrogen gas?
A. Be
B. Mg
C. Si
D. Ba

I believe the answer is A.

Hope this helps! ^^

Because you ate playdough

Answerit curves up and levels out.explanationwe assume that the container contains absolutely no ammonia to begin with as it states that "nitrogen gas and hydrogen gas" react to "produce ammonia."at dynamic equilibrium, the product and reactant concentrations are equal.this means that, starting from a concentration of zero, [nh₃] must curve "up" from zero and then level out to a constant concentration.