An apple is placed on a scale. the scale shows that the apple weighs 1/4 a pound. this demonstrates that the apple has

A: Atoms.

B: Elements.

C: Vitamins.

D: Weight.

How are the electron structures of boron (B) and aluminum (Al) similar?

Determine the oxidation number for the indicated element in each of the following compounds: (a) Co in LiCoO2, (b) Al in NaAlH4, (c) C in CH3OH (methanol), (d) N in GaN, (e) Cl in HClO2, (f) Cr in BaCrO4.

Why is the ocean water near the poles less salty than other places? Question 8 options: Rain washes mineral ions from the land into water. Fresh water from the glaciers are melting into it. Active underwater volcanoes erupt nearby.

What is the molar mass of (NH4) 2O? Explain how you calculated this value.

The difference between a molecule and a compound is that a compound is made up of atoms from

Which statement describes the redox reaction that occurs when an object is electroplated? A. It is spontaneous and requires an electric current. B. It is spontaneous and produces an electric current. C.

How are electromagnetic different than all other waves

Find the ratio of speeds of an electron and a negative hydrogen ion (one having an extra electron) accelerated through the same voltage, assuming non-relativistic final speeds. Take the mass of the hydrogen ion to be 1.67*10^{-27} kg.

A type of rock that undergoes changes because of heat and pressure

How many milliliters of a 1.25 molar HCL solution would be needed to react completely with 60 g of calcium metal Ca+2HCl - - > CaCl2 + H2