How many moles of gold are present in a solid 500g nugget? a 8.76 moles b 3.97 moles c 2.54 moles d 2.14 moles

Ethanol is increasingly being used as a fuel for cars. The standard enthalpy change of formation of carbon dioxide is - 393 kJmol. The standard enthalpy change of formation of water is - -286 kJmol.

What would occur if some of the red blood cells were placed in beaker C/plasma? Recall that red blood cells normally float in plasma. A The concentration of water inside and outside the cells would be equal, so no diffusion would occur.

The space shuttle___.

Jellyfish, mushrooms, oak trees, and bacteria contain cells. Which component of cell theory does this best illustrate? A. all living things are made of cells B. Most organisms are made of cells C. All cells come from other cells D.

Which source is the most reliable? a. a report published on wikipedia b. an article evaluated by other scientists c. a blog about plant growth d. an advertisement about weight loss

What is the nature of the Ca-Cl bond in a molecule of calcium chloride (CaCl2) if the electronegativity value of calcium is 1.0 and that of chlorine is 3.167 O A nonpolar covalent B. moderately polar covalent C.

Which statement is true about oxidation and reduction in an electrochemical cell? (1) Both occur at the anode. (2) Both occur at the cathode. (3) Oxidation occurs at the anode and reduction occurs at the cathode.

For a solar eclipse to occur,

How many times does the citric acid cycle occur for each molecule of glucose?

Which planet is made of mostly gas