Naomi Aronson
Chemistry teacher | Tutor for 9 years
With a passion for chemistry ignited at Hope College, my journey into the intricacies of matter began. Armed with knowledge and enthusiasm, I'm here to guide you through the world of atoms and molecules. From balancing equations to exploring the wonders of organic chemistry, I'm committed to making complex concepts clear. Let's unravel the mysteries of science together, one question at a time.
Questions
What are the elements #S, F, Se# in order of decreasing electronegativity?
What happens when an acid and base react?
What is the freezing point of bromine?
A sample of ammonium nitrate having a mass of 3.88 grams of water is dissolved in 60.0 g of water. The temperature of the water decreases from 23.0°C to 18.4°C. What is the molar enthalpy of dissolution for ammonium nitrate?
What is the formula mass of ammonium carbonate (#(NH_4)_2CO_3#)?
If 1.93 * 10^-3 mol of argon occupies a 65.8-mL container at 20 degrees Celsius, what is the pressure (in torr)?
What is an example of a saturation practice problem?
A buffer solution contains 0.20 M #CH_3COOH# and 0.30 M #CH_3COONa# at #25^oC#? (#Ka=1.8 x10^-5#). What is the pH after the addition of (a) 20.0 mL of 0.050 M #NaOH# or (b) 20.0 mL of 0.050 M #HCl# to 80.0 mL of this buffer solution?
Which will normally warm faster: a black pot of cold water or a silvered pot of cold water? Which will cool faster?
Magnesium metal (0.100 mol) and a volume of aqueous hydrochloric acid that contains 0.500 mol of HCl are combined and react to completion. How many liters of hydrogen gas, measured at STP, can be produced? #"Mg"(s) + 2"HCl"(aq) -> "MgCl"_2(aq) + "H"_2(g)#
Which species is oxidized in the reaction below?
How was Le Chatelier's principle used to determine the extinction coefficient?
How many grams of solid sodium hydroxide are required to make 175.00 mL of a 0.5100 M #NaOH# solution?
What is the molar mass for Mn2O7, an oxide of manganese?
C7H12 reacts with O2 to produce CO2 and H2O. Suppose 348 g of CO2 are produced in this reaction. What mass of O2 reacted?
Which has a more pronounced ionic character FeCl2 or FeCl3? Fe+6 is ionic or has a more pronounced covalent character?
The slight negative charge at one end of one water molecule is attracted to the sight positive charge of another water molecule. What is this attraction called?
How do you use electronegativity values to determine the one element that always has a negative oxidation number when it appears in any binary compound?
What is the name of #PbO#?
A sample of rock is known to contain the isotopes U 238 and Pb 206 in the mass ratio of 2:1. What is the age of the sample assuming all the Pb 206 has originated from the decay of U 238 ?The half - life of U 238 is #4.468xx10^9# years.