is aluminum foil a compound element or mixture?

A reaction takes place with a mass defect of 0.030kg. How much energy does this correspond to?

Which example is a trace fossil? {A} dinosaur egg {B} dinosaur footprint {C} dinosaur bone {D} shark tooth

If we had three moles of sulfuric acid, how many moles of sodium hydroxide would we need?

In order to buffer a strong acid into a weak acid, which has a less dramatic effect on ph, what chemical should be used as the buffer?

Observe the reactions given below. Classify the reactants based on whether they are oxidized or reduced. Zn (s) + Cu2 + (aq) →Zn2 + (aq) + Cu (s) 3Fe (s) + 4H2O (g) →Fe2O3 (s) + 4H2 (g) Drag the appropriate items to their respective bins.

What is the relationship between frequency and velocity of a wave direct inverse or no relationship

How do scientist know that atoms and molecules combine in well-ordered arrays?

Explain why potassium and argon react together

Which indicator will be the same color in hydrochloric acid as it is in pure water? 1. methyl orange 2. phenolphthalein 3. bromcresol green

Based on your knowledge of energy resources conservation, which of the following statements is true? a) Manufacturers can increase a light bulb's energy efficiency by using technology that decreases the amount of electromagnetic energy the bulb