Which element has 38 electrons, is found in group 2, period 5? Fun fact: This element gives us the bright red colors in fireworks!

What is it called when particles travel from an area of high consentration to an area of low consentration?

What is the atomic number of hydrogen?

An monatomic ideal gas at 300 K has a volume of 15 liters at a pressure of 15 atm. Calculate a. The final volume of the system b. The work done by the system c. The heat entering or leaving the system d. The change in the internal energy e.

A standard solution contained 0.8 mg/mL. A student took 2 mL of the standard solution and added 10 mL of water. What is the new/final concentration?

In which order are the processes listed below most likely to occur? a. erosion-deposition-weathering b. deposition-erosion-weathering c. wethering-deposition-erosion d. wethering-erosion-deposition

5. Identify a suitable method that would be used to separate mixture of the follow [b]Water and ethanol c]Table salt dissolved in water d] iodine and potassium Pul the table below

How much energy is needed to convert 57.3 grams of ice at 0.00°c to water at 75.0°c? specific heat (ice) = 2.10 j/g°c specific heat (water) = 4.18 j/g°c heat of fusion = 333 j/g heat of vaporization = 2258 j/g?

A certain first-order reaction (A→productsA→products) has a rate constant of 9.90*10-3 s-1s-1 at 45 ∘C∘C. How many minutes does it take for the concentration of the reactant, [A][A], to drop to 6.

Assign the oxidation number for (NH4) 3PO4

When gold is melted and formed in a mold to make a piece of jewelry, what type of change is taking place?