Which substance accounts for nearly 80 percent of Earth's atmosphere?

A. oxygen

B. nitrogen

C. carbon dioxide

D. argon

A stock solution containing Mn2 + ions was prepared by dissolving 1.166 g pure manganese metal in nitric acid? and diluting to a final volume of 1.000 L. The following solutions were then prepared by dilution. For solution A, 50.

A hydrogen atom requires a minimum energy of 2.18*10^-18 J atom to remove an electron from its ground state level. Determine whether a blueviolet light with a wavelength of 434.0 nm can affect this process.

How do you know what numbers in a chemical formula are significant

In which step of the four-stroke engine cycle does the car release CO2, H2O, and CO?

The precision of a balance is + 0.02 g. The accepted value for a measurement is 26.86 g. Which measurement is in the accepted range? • 26.029 26.82 g 26.87 g 26.90 g

What ionic bond occurs between what particles? A. Two Negative Ions B. A positive and negative ion C. Two positive ions D. Two neutral atoms

Which of the following are good traits of a hypothesis? it will be able to be tested it can predict an outcome it will explain the observations all of these

What is the mass of a box of nails

In a phase change of water between the liquid and the gas phases, 770.1 kJ of energy was released by the system. What was the product, and how much of it was formed in the phase change? (dа ta: H₂O (l) → H₂O (g) ΔH = 44.01 kJ/mol.) A.

Explain the problem surrounding the ammonia-making process in terms of chemical equilibrium. Chemical equation for producing ammonia: N2 + 3H2 ⇌ 2NH3 + energy