At STP, which 4.0-gram zinc sample will react fastest with dilute hydrochloric acid?

(1) lump (3) powdered (2) bar (4) sheet metal

So2 is covalent or ionic

Why do atoms exhibit line spectrum?

Calculate the external pressure that must be applied to seawater, 1.12 M total ion concentration at 10 degrees celsius if the maximum concentration allowed in the product water is 171 mg/L.

An apple turning brown after being cut is an example of what type of change

Whitch star is the hottest? Blue Giant, Super Giant, Red Giant, Sun, or WHite Dwarf

Testing a hypothesis is called a

When molten rock undergoes crystallization above ground, what type of rock results? a. intrusive igneous rock b. extrusive igneous rock c. metamorphic rock d. sedimentary rock

A 150ml sample of hydrochloric acid completely reacted with 60.0mL of a 0.100 M NaOH solution. What was the original concentration of the HCl solution

Rearrange in to a quadratic 5.333 = (0.6 + 2p) ² / (0.135 - p)

How hot would a 2.3 L balloon have to get to expand to a volume of 3.0 L? Assume the initial temperature of the balloon is 24 °C, and that the pressure inside the balloon remains constant. A. 3 K B. 42 K C. 128 K D. 390 K