Which of these is an appropriate instrument to measure mass?

balance

scale

ruler

graduated cylinder

How many moles of alumminum os needed to react woth 6.34 moles of fe3o4 in thereaction below? 8al + 3fe3o4_ 4al2o3 + 9 fe

The amount of time it takes for half of a radioactive isotope to decay is known as the

In the process of making soap, I poured some of the cooked mixture through some muslin fabric, in order to separate the solid particles from liquid. What am I doing to this mixture? A) Serrating it B) Decanting it C) Mixing it D) Filtering it

The number of atoms in 12.0 grams of C-12 IS

The dopamine molecule has an intermediate hydrophobicity. Edit the dopamine molecule so that it is more hydrophobic.

Define buffer capacity. a. buffer capacity is the amount of acid or base that can be added to a buffer without destroying its effectiveness. b. buffer capacity is the amount of acid that can be added until all of the base is used up. c.

Which of the following is not a chemical reaction a) gas formation b) solid formation c) energy change d) state change

How many moles of copper are needed to react with sulfur to produce 0.25 moles Ol copper (1) sulfide according to the following reaction: 2 Cu + S + Cuzs

If you wish to warm 52 kg of water by 22 ∘c for your bath, find what the quantity of heat is needed. express your answer in calories cal.

Which of the following compounds is the most soluble in water? a) propanoic acid b) propane c) propanal d) l-bromopropane