Na2SO4 -> 0.5 mol
Na+ ions= 0.5 x 2 = 1
SO4(2-) = 0.5
conc of Na+ = 1 / 1.33 = 0.75
conc. of SO4 ion = 0.5 / 1.33 = 0.37
Answer:
9,480 mg
Explanation:
he average caffeine content of an 8-oz, brewed cup of coffee is 95 mg. A single espresso or espresso-based drink contains 63 mg, and decaf coffee contains about 3 mg of caffeine (on average).
Answer: Hydrogen belongs to group 1 metal elements in the periodic table.
Explanation:
The hydrogen is a highly active metal. It has a single electron in its valence shell and it can donate its electron to other metal atoms. Thus forming metal hydrides. The hydrogen when ignited it reacts with oxygen and burns explosively this is indicative of high reactivity and spontaneous reactivity of hydrogen atom.
Physical
When something is cooling it isn’t changing it’s chemical composition so it’s physical