What mass of ammonia, NH3, is necessary to react with 2.1 x 10^24 molecules of oxygen in the following reaction? 4NH3 (g) + 7O2 (g) - - > 6H2O (g) + 4NO2 (g)

In addition to identifying a chemical's composition, what can often be determined using gas chromatography, mass spectroscopy or infrared spectrophotometry or a combination of these tests?

A 0.25 m solution of the sugar sucrose (c12h22o11) in water is tested for conductivity using the type of apparatus shown. Bulb wires solution being tested plugged into wall outlet what do you predict will happen? 1.

Write a balanced equation for the combination reaction described, using the smallest possible integer coefficients. When diphosphorus pentoxide combines with water, phosphoric acid is formed.

Among the alkali earth metals, the tendency to react with other substances A) increases from bottom to top within the group. B) is shown by the ways they react with water. C) varies in an unpredictable way within the group.

A volume of 75.0 mL of H2O is initially at room temperature (22.00 ∘C). A chilled steel rod at 2.00 ∘C is placed in the water. If the final temperature of the system is 21.

The scientific study of the behavior of matter near 0 K is called

Lithium has one valence electron. Bromine has seven valence electrons. How might they form a covalent bond? A. Bromine donates seven electron to lithium B. Bromine donates an electron to lithium C. Lithium donates seven electrons to Bromine D.

What is the measurement 1042 L rounded off to two signicant digits?

2CO + 2NO yields 2CO2 + N2 which element was oxidized

What what is any harm to the physical chemical or biological health of the ocean ecosystem