Derive the following
Sinx
Cosx
Tanx
Secx
Cscx
Cotx
What is
Cosx
-Sinx
Sec^2
SecxTanx
-cscxcotx
-csc^2
100
An unknown compound with a molecular weight of 1.08633 kg/mol consists of carbon,hydrogen,oxygen and bismuth was determined to have 17.67% oxygen, 1.392% hydrogen and 23.22% carbon by mass. What is the empirical formula?
What is C7H5O4BI
200
A tentative proposal that explains observations
What is a Hypothesis?
200
y= x^2sinPIx
What is x(PIxcosPIx + 2sinPIx)
200
The total mass of a substance does not change during a chemical reaction
What is the law of mass conservation?
200
Criteria for Continuity
What is
1.) f(a) is defined
2.) lim -> a f(x) exists
3.) They must be equal
200
How many molecules are in 18.06 mL of H20?
(Density H20 =9.98X10^-4 g/mm^3
1gallon= 3.785dm^3,
1ml=1cm^3 )
What is 6.024x10^23 ?
300
Name 5 of the 7 SI Units and their abbreviation
What is Mass (kg), Length(m), Time(s), Temperature(k), Electric Current(A), Amount of a substance(mol), Luminous intensity(cd)
300
y=cot(3x^2 +5)
deriveeee
What is -6xcsc^2(3x^2+5)
300
Name the four components of Daltons atomic theory
What are
1.) All matter consists of atoms
2.) Atoms of one element cannot be converted to atoms of another element
3.) Atoms of an element are identical, atoms of different elements are different
4.)Ratio
300
Manganese (Mn) is a transition element essential for the growth of bones. What is the mass in grams of 3.22x10^22 Mn atoms.
What is 2.94x10^-2
400
Convert 68 degrees Fahrenheit to Celsius and Kelvin
What is 20 degrees Celsius and 293K
400
find h' in terms of f' and g'
h(x)= f(x)g(x)
________
f(x) + g(x)
What is h'(x)=f'(x)[g(x)]^2 + g'(x)[f(x)]^2
_____________________
[f(x) +g(x)]^2
400
Give the name and formula for the acid derived from each of the following anions
a.) hydrogen sulfate
b.) Cyanide
c.) HS-
What is
H2SO4, SULFURIC ACID
HCN, HYDROCYANIC ACID
H2S, HYDRO SULFURIC ACID
400
lim (x^2)-9/
(x^2) +2x -3
x-->3
What is 3/2
400
Determine the mass % of all elements in the active ingredient in Pepto- Bismol. The formula is C12H15O12Bi3
What is
C=23.22%
H=1.392%
O=17.67%
Bi=57.73%
500
Perform the following calculation paying special attention to sig figs, rounding, and units.
[(6.026x10^-34 J*s) (2.9979x10^8 m/s)]
__________________________________
489x10^-9 m
What is 4.06x10^-19 J
500
If a rock is thrown vertically upward from the surface of Mars vith velocity 15 m/s, its height after t seconds is h=15t - 1.86t^2
a.) what is the velocity of the rock after 2s
b.) what is the velocity of the rock when its height is 25m on its way up? on its way down?
What is
a.) 7.56 m/s
b.) 6.24 m/s ; -6.24m/s
500
A compound of copper and sulfur contains 88.39g of metal and 44.61g of nonmetal. How many grams of copper are in 5264kg of compound? How many grams of sulfur?
What is 3.498x10^6 g Cu and 1.766x10^6 g S
500
lim cos(x+sinx)
x-->0
What is 1
500
Convert the following into a balanced equation
: Liquid hexane burns in oxygen gas to form carbon dioxide gas and water vapor.
What is 2C6H14(l) + 19O2(g) ---> 12CO2(g) + 14H20(g)