2. How many copper atoms are contained in a 2.75 mole sample of copper

What specifically does STR measure? A) STR length B) the number of repeating units C) distance traveled on electrophoresis gel D) the difference between the number of repeating units between two STRs

What does cell division allow ALL multicellular organisms to do? A. reproduce B. repair tissue C. get rid of waste D. produce energy

Why is aluminium in group 3 of the periodic table?

What does ph stand for in chemistry

4HCI + O2 = 2H20 + Cl2 Which of the following would result from increasing the concentration of H20? The rate of the backward reaction increases. The volume of hydrochloric acid decreases. Im The rate of forward reaction increases.

How many joules of heat are needed to raise the temperature of 1.5 g of aluminum at 45°C, if the specific heat of aluminum is 0.75 J/g°C? Group of answer choices

Which is the best predictor of the radioactive nature of an isotope? (A) the proton-to-electron ratio (B) the neutron-to-proton ratio (C) the neutron-to-electron (D) ratio the electron-to-proton ratio

Which of the following statements correctly describes the relationship between fossils and rock strata? Fossils found in the rock strata are all the very small in size. Fossils are all found only in the top layers of the rock strata.

The trend for ionization energy is a general increase from left to right across a period. However, magnesium (Mg) is found to have a higher first ionization energy value than aluminum (Al).

A man is about to receive a bone marrow transplant. He is taking pills to suppress his immune system so that: A. his immune system does not attack the transplanted marrow. B. his immune system can recover after surgery. C.