smart.gov.qa
Home
Search
Login
Search
Chemistry
Chemistry
High School
Draw the Lewis structure for HCCH.Draw the molecule by placing atoms on the canvas and connecting them with bonds. Include all hydrogen atoms and nonbonding electrons.
Chemistry
High School
what is the ph of a solution prepared by mixing 25.00 ml of 0.10 m ch3co2h
Chemistry
High School
what is the equivalence point volume, in milliliters, for titration of 51.5 ml of 0.15 m h c l o 4 with a sample of 0.35 m n a o h ?
Chemistry
High School
it is observed that 7.5 mmol of baf2 will dissolve in 1.0 l of water. use these data to calculate the value of ksp for barium fluoride.
Chemistry
High School
what is the concentration of hcl if 20m of acid is neutralized by 30 ml of a 0.1 m solution of sodium hydroxide
Chemistry
High School
select the statements that correctly describe an object in thermal equilibrium with a reservoir.
Chemistry
High School
what is hrxn for the following chemical reaction? co2(g)+2koh(s)h2o(g)+k2co3(s)
Chemistry
High School
which soil particle has the greatest total surface area per gram?
Chemistry
High School
which equation correctly represents the neutralization of aluminum hydroxide by sulfuric acid?
Chemistry
High School
how many moles of h2o contain 4.02 1022 atoms of hydrogen?
Chemistry
High School
how many unpaired electrons would you expect for the complex ion [cocl4] 2- if it is a tetrahedral shap
Chemistry
High School
Which of the following must be true for a spontaneous exothermic process? a. only that ASsys 0 b. only that ASsys>0 c. both ASys
Chemistry
High School
hy. please help. calculate the volume of water should be added into 25 ml of 0.10 m HCL solution to diluted 5 times
Chemistry
High School
ammonia is a weak base that will react in water following the equation below. nh3 h2ox oh what is the chemical formula for the conjugate acid of nh3?
Chemistry
High School
the carbon-14 dating method can be used to determine the age of a
Chemistry
High School
Q3 (10 points) Find w, x, y and z such that the following chemical reaction is balanced. w Ba3 N + xHO yBa(OH)2 + 2NH3
Chemistry
High School
Chromosomes are correctly described by which of the following?Always formed in an X shaped moleculeTwo polymers strands of amino acids that bond together and wrap like a spiralTwo polymers strands of nucleotides that bond together and twist around .all of the choices are correct
Chemistry
High School
the entropy change for a real, irreversible process is equal to:
Chemistry
High School
Calculate the standard reaction enthalpy for the reaction below: 3Fe2O3(s) 2Fe3O4(s) + O2(g)
Chemistry
High School
the skeletal formula represents what type of alcohol? group of answer choices primary secondary tertiary quaternary none
Chemistry
High School
draw a structural formula for the intermediate in the following reaction:ch2cl2
Chemistry
High School
the following question refers to a 1.0-liter buffered solution created from 0.34 m nh 3 ( k b = 1.8 10 5) and 0.26 m nh 4f. when 0.10 mol of h ions is added to the solution what is the ph?
Chemistry
High School
use standard enthalpies of formation in the table above to determine horxn for the reaction: al2o3(s) 3co(g)2al(s) 3co2(g) 1393 kj -3188 kj -1392.7 kj 826.7 kj
Chemistry
High School
In glycolysis, fructose 1,6-bisphosphate is converted lo two products with a standard free energy change (DeltaG^10 of 23.8 kJ/mol. Under what conditions (encountered in a normal cell) will free energy change (DeltaG) be negative, enabling the reaction to proceed forward? Under standard conditions, enough energy is released to drive the reaction to the right e reaction will not 90 to the right spontaneously under any conditions because DeltaG^10 is positive When there is a high concentration of fructose 1.6-bisphosphate relative to the concentration of products When there is a high concentration of a product relative to the concentration of fructose 1.6 bisphosphate If the concentrations of the two products are high relative to that of fructose 1,6-bisphosphate
« Previous
Page 1
Next »