there are 25 elements found in living things. how many of these elements are found in some organisms but not at all?

What is a number written in front of a chemical formula

For the reaction, X + Y → A + B, ΔGo is - 1324 kJ. Which one of the following statements is NOT valid concerning the reaction? a. The reaction is spontaneous as written. b. Three of these statements are valid. c.

35 When lithium reacts with bromine to form the compound LiBr each lithium atom (1) gains one electron and becomes a negatively charged ion (2) gains three electrons and becomes a negatively charged ion (3) loses one electron and becomes a

Is citric acid a organic

Which of these cannot be decomposed into simpler substances?

Why openness is important to the progress of science?

At a certain temperature the rate of this reaction is second order in NH4OH with a rate constant of 34.1 M^-1s^-1: Suppose a vessel contains NH4OH at a concentration of 0.100M.

If you go into the lab and dissolve 2.11 g of magnesium chloride in enough water to make 1500 ml of solution, what is the molarity of the resulting solution?

Which one of the following Acids is most likely to hurt you? Acid A: 1.0 M; Acid B: 0.0001M

Which statement accurately describes the atoms of a specific element? explain your answer in complete sentences. A. A Neon, Ne, atom contains 10 electrons outside the nucleus and 11 neutrons inside the nucleus. OR B.