Calculate the gram formula mass of NH4Cl.
53g/mol
What is the mass, symbol, and charge of an alpha particle
a, mass of 4u, positive charge
Provide a molecular formula for an alkene
answers may vary
Which statement describes the particles of an ideal gas, based on the kinetic molecular theory?
(1) There are attractive forces between the particles.
(2) The particles move in circular paths.
(3) The collisions between the particles reduce the total energy of the gas.
(4) The volume of the gas particles is negligible compared with the total volume of the gas.
(4) The volume of the gas particles is negligible compared with the total volume of the gas.
Is AgSO4 a soluble compound?
NO
A 2400gram sample of an aqueous solution contains 0.012gram of NH3. What is the concentration of NH3 in the solution, expressed as parts per million?
5ppm
What is a transmutation?
When the nucleus of an atom decays and the element changes into a different element with a different # of protons (element/nucleus transforms into a different element)
an ester and water
Under which conditions of pressure and temperature is a real gas most like an ideal gas?
(1) low pressure and low temperature
(2) low pressure and high temperature
(3) high pressure and low temperature
(4) high pressure and high temperature
2. low pressure and high temperature
58g of NaCl is added to 2L of water. What is the molarity?
0.5M
One sample of a green vegetable contains 0.0035gram of boron. Determine the total number of moles of boron in this sample.
0.00032 moles
Complete this nuclear equation
24Na --> 0e + __________
11 -1
24Mg
12
Draw the structural formula for propyne.
Will draw on the board.
Which two gas samples contain equal numbers of atoms (all at 100kPa)
(1) helium and neon
(2) helium and argon
(3) neon and argon
(4) neon and krypton
(2) helium and argon
Name two metals more easily oxidized than Sr.
answers may vary.
What is the percent composition of H in (NH4)2SO4?
6.0%
After 3 half lives, 12.5 grams of an original sample remains unchanged. What is the mass of the original sample?
100g.
Draw two isomers of 1-heptene
answers may vary
What is the boiling point of ethanol at STP?
78C
What. is the mass of KNO3(s) that must dissolve in 100 grams of water to form a saturated solution at 50C?
84grams. (82-86 will be acceptable)
Balance the follow equation
Al(s) + CuSO4(aq) --> Al2(SO4)3(aq) + Cu(s)
2,3,1,3
48.126 days
Draw the structural formula for a molecule with one chlorine and three carbons. Then name the organic molecule.
will draw and name on the board.
A 220.0mL sample of helium gas is in a cylinder with a movable piston at 105kPa and 275K. The piston is pushed in until the sample has a volume of 95mL. The new temperature of the gas is 310K. What is the new pressure of the sample?
274kPa.
30mL of 0.6M Hal solution is neutralized by 90mL of NaOH solution. What's the concentration of the base?
0.2M