Which of the three substances has the greatest porosity?

a. gravel

b. sand

c. silt

d. all are equal

Which color has a higher frequency, A. red light B. blue light

The Haber process for producing ammonia commercially is represented by the equation N2 (g) + 3H2 (g) - > 2NH3 (g). To completely convert 9.0 mol hydrogen gas to ammonia gas, how many moles of nitrogen gas are required?

The element least likely to form a bond is group

Which term describes the degree to which an element attracts electrons?

The thermite reaction, in which powdered aluminum reacts with iron oxide, is highly exothermic: 2al (s) + fe2o3 (s) →al2o3 (s) + 2fe (s) use standard enthalpies of formation to find δh∘rxn for the thermite reaction.

In the second step of this reaction, isocyanic acid reacts to form melamine and carbon dioxide: HNCO (l) →C3N3 (NH2) 3 (l) + CO2 (g) Balance this reaction and enter the coefficients below.

If the Kelvin temperature of a gas is tripled and the volume if doubled, the new pressure will be ___. A. 3/2 the original pressure B. 1/6 the original pressure C. 5 times the original pressure D. 2/3 the original pressure the answer isnt b or c

To squeeze gas into a smaller space

What kind of solution would have a Kb value much greater than 1? A. a weakly acidic solution B. a strongly basic solution C. A strongly acidic solution D. A weakly basic solution

Zoom all the way in to Daphne Major. Describe its appearance in two sentences.