Why do hydrogen atoms accompany electrons as they are transferred in biological systems?

Which of the following is necessary for plants to exhibit phototropism? A. Gravity B. Touch C. Auxin D. Dormancy

A compound is found to contain 63.65 % nitrogen and 36.35 % oxygen by mass. what is the empirical formula for this compound?

What metric units does a graduated cylinder use?

Which scenario would result in a positive population growth? Use this formula: population growth = (birth rate + immigration) - (death rate + emigration) A) 30 individuals emigrate, 30 individuals die, 30 individuals are born, 0 individuals

explain briefly why a tightly corked glass bottle filled to the brim with fresh palm wine shatters on standing for sometime

A sample of hydrogen gas is mixed with water vapor. The mixture has a total pressure of 755 torr and the water vapor has a partial pressure of 24 torr. What amount (in moles) of hydrogen gas is contained in 1.55 L of this mixture at 298 K?

Both equation I and II are balanced, but equation II is the correct way to write the balanced equation. Why do you think this is? (Hint: Think fractions.) I) 2 SnO2 + 4 H2 → 2 Sn + 4 H2O II) SnO2 + 2 H2 → Sn + 2 H2O

If some of the salt remains adhered to the weighing paper (and therefore is not transferred to the calorimeter), will the enthalpy of solution for the salt be reported too high or too low?

In one process, 5.95 kg of caf2 is treated with an excess of h2so4 and yields 2.45 kg of hf. calculate the percent yield of hf.

What are 3 ways to increase the solubility of a solid substance in a solid?