Posts by Boo Boo

Total # Posts: 34

math
Determine the area of the square ABCD with AB=3rd

english part 1
the answer is B. there I read it for you

chemistry
a. what is the effect on the Kc when the temperature of an exothermic reaction is lowered? b. according to Le Chatelier's principle, how is equilibrium in part a established.

chemistry
If isomers of an alkane have the same molecular formula, how do they differ?

chemistry
How does a complete structural formula differ from a condensed structural formula?

chemisty
How many mL of a 0.5M Ca(OH)2 solution are needed to neutralize 38mL of a 2M HNO3 solution?

chemistry
what is the molarity of the acid in when a 30mL sample of HCl is titrated with 10mL of 6M NaOH?

chemistry
@20*C solubility - 22g CuSO4 / 100g H2O @40*C solubility - 42g CuSO4 / 100g H2O which is saturated and unsaturated a. @20*C is 6g CuSO4 / 25g H2O b. @20*C is 30g CuSO4 / 150g H2O c. @40*C is 99g CuSO4 / 250g H2O please show work thanks

chemistry
Does that mean when heat is added it favors the reactant side?

chemistry
Predict how changes effects equilibrium for N2(g) + 3H2(g) -----> 2NH3(g) + heat a. add heat b. remove heat c. add NH3(g) d. remove NH3(g)

chemistry
Calculate the amount of solute needed to make each of the solution. 225g of a 10% (m/m) K2CO3 solution .50kg of a 18% (m/m) KOH solution please show work thanks

chemistry
The following soluble salts are strong electrolytes. For each, write a balanced equation for their dissociation in water. a. LiBr b. NaNO3 c. FeCl3 d. Mg(NO3)2

chemistry
A solution containing 80g of NaNO3 in 75g of H2O at 50 degrees celsius is cooled to 20 degrees celsius. A. how many grams of NaNO3 remain in solution at 20 degrees celsius? B. How many grams of solid in NaNO3 crystallized after cooling?

chemistry
Determine whether a solid forms when solutions containing the follow salts are mixed. If so, write the ionic equation and the net ionic equation. a: Na3PO4 and AgNO3 b: K2SO4 and Na2CO3 C: Pb(NO3)2 and Na2CO3 d: BaCl2 and KOH

chemistry
explain the following observations; A. an open can of soda loses its fizz quicker at room temperature than in the frig. B. chlorine gas in tap water escapes as the water warms to room temperature. C. less sugar dissolves in iced coffee than in hot coffee.

chemistry
A solution containing 80g of NaNO3 in 75g of H2O at 50 degrees celsius is cooled to 20 degrees celsius, how many grams of solid NaCO3 crystallized after cooling?

chemistry
A sample containing 4.8 g of O2 gas has a volume of 15.0L. Pressure and temperature remain constant. What is the volume after 4.00g of He is added to the 4.8g of O2 gas in the container

chemistry
A sample containing 4.8g of O2 gas has a volume of 15.0L. Pressure and temperature remain constant. What is the new volume if 0.500 mole of O2 gas is added?

chemistry
Explain the observation: water used to sterilize surgical equipment is heated to 120 degrees celsius at 2.0 atm in an autoclave.

chemistry
Use the kinetic molecular theory of gases to explain each of the following: a. a container of nonstick cooking spray explodes when thrown into a fire. b. the air in a hot-air balloon is heated to make the balloon rise.

chemistry
For each reaction, calculate the moles of product (in parentheses) when 2.00 moles of each reactant is used A: 2SO2 + O2 = 2SO3 (SO3) B: 3Fe + 4H2O = Fe3O4 + 4H2 (Fe3O4) C: C7H16 + 11O2 = 7CO2 + 8H2O (CO2)

CHEMISTRY
In each reaction, calculate the moles of product (in parentheses) when 3.00 moles of each reactant is used. A: 4Li+O2 = 2Li2O (Li2O) B: Fe2O3+3H2 = 2Fe+3H2O (Fe) C: Al2S3+6H2O = 2Al(OH)3+3H2S (H2S) Please show work, Thanks

chemistry
how do the names of covalent compounds differ from the names of ionic compounds?

chemistry
what is the shape of a molecule if the central atom has two bonded atoms and two lone pairs

chemistry
Approximately what electronegativity difference would you expect for a polar covalent bond?

chemistry
How does the bond that forms between Na and Cl differ from a bond that forms between N and Cl?

chemistry
A patient with polycythemia vera(excess production of red cells) receives raioactive phosphorus-32. Why would this treatment reduce the production of red blood cells in the bone marrow of the patient?

chemistry
Technetium-99m emits only gamma radiation. Why would this type of radiation be used in diagnostic imaging rather than an isotope that also emits beta or alpha radiation?

Math 116 algebra
Solve using the addition and multiplication principles 5+ 6x < 53

Math 116 algebra
Find the domain of function g(x)=3/9-2x

Math 116 algebra
Graph on a munber line, where x is a real number -1< x ¡Ü 3

Math 116 algebra
use < or > to make the statement true -19 19

Math 116 algebra
solve by the elimination method 3r - 7s = -28 7r + 3s = 70

Math
Soybean meal is 18% protein; cornmeal is 9% protein. how many pounds of each should be mixed together in order to get 360lb mixture that is 11% protein? How many pounds of the cornmeal should be in the mixture? How many pounds of the soybeans meal should be in the mixture? The...