-
After a few days, it is time to depart Cape Town and fly to Paris, a distance of 9,306 km. You take your Dassault Falcon 2000LXS jet, which cruises rather effortlessly at 450 knots. If 1 knot = 1.1508
$15.00
Chemistry
Answered
-
Can someone help me with drawing the lewis structure of (CH3)2CHCH2OCH2CH3? I've done it twice already and it still says it is incorrect. I don't see the problem and I'm about to quit. Here is a pictu
$12.00
Chemistry
Waiting for answer
-
3.6 grams of salt will dissolve in 10 grams of water. How many grams of salt will dissolve in 1000 grams of water?
$20.00
Chemistry
Waiting for answer
-
How many grams of methane gas (CH4) are in a 15.8-liter sample at 1.2 atmospheres and 27°C? Show all work used to solve this problem.
$10.00
Chemistry
Answered
-
Consider the balanced equation. PCl3 + 3H2O mc032-1.jpg H3PO3 + 3HCl What is the percent yield of HCl if 42.0 g of HCl are produced from the reaction of 62.0 g of PCl3?
$20.00
Chemistry
Answered
-
Create a scale for your model thermometer. Divide the distance between the two marks into 5-mm intervals. Starting with the lowest point, label the intervals on the straw 0, 1, 2, 3, and so on. Descri
$10.00
Chemistry
Answered
-
What is the freezing point of a solution prepared from 50.0 g ethylene glycol (c2h6o2) and 85.0 g h2o?
$35.00
Chemistry
Answered
-
The heat of formation of fe2o3(s) is -826 kj/mol. calculate the heat of the reaction for 4fe(s) 3o2 (g) → 2fe2o3(s) when a 55.8-g sample of iron is reacted. answer: δh of reaction
$20.00
Chemistry
Waiting for answer
-
Sodium hydroxide is used extensively in acid-base titrations because it is a strong, inexpensive base. a sodium hydroxide solution was standardized by titrating 30.65 ml of 0.1159 m standard hydrochlo
$10.00
Chemistry
Waiting for answer
-
0 ml of 0.120 m naoh is added to 565 ml of 0.200 m weak acid (ka = 8.25 × 10-5). what is the ph of the resulting buffer?
$50.00
Chemistry
Waiting for answer
-
High-density polyethylene may be chlorinated by inducing the random substitution of chlorine atoms for hydrogen. determine the concentration of cl (in wt%) that must be added if this substitution occu
$10.00
Chemistry
Answered
-
Calculate the concentration of the lactate ion in a solution that is 0.100 m in lactic acid (ch3ch(oh)cooh, pka = 3.86) and 0.080 m in hcl.
$10.00
Chemistry
Answered
-
Calculate the freezing point of a 2.5 m aqueous sucrose solution. (Assume that Kf for water is 1.86∘C/m.)
$50.00
Chemistry
Waiting for answer
-
Acetone is a common solvent and has a density of 0.7899 g/ml. What volume of acetone in ml has a mass of 28.6g
$50.00
Chemistry
Answered
-
At standard pressure, which substance becomes less soluble in water as temperature increases from 10 degrees Celsius to 80 degrees Celsius?
$15.00
Chemistry
Waiting for answer
-
An aluminum kettle weighs 1.05kg. What is the heat capacity of the kettle? How much heat is required to increase the temperature of this kettle from 23.0 °C to 99.0 °C? How much heat is required to
$12.00
Chemistry
Waiting for answer
-
A 14.01 g sample of N2 reacts with 3.02 g of H2 to form ammonia (NH3). If ammonia is the only product, what mass of ammonia is formed? (3 points) Equation of reaction: N2 + 3 H2 2NH3 Hint: First d
$35.00
Chemistry
Answered
-
Amy performed an experiment in lab. She improperly mixed the chemicals, and an explosion of light, sound, and heat occurred. When Amy mixed the chemicals, energy was
$12.00
Chemistry
Waiting for answer
-
In the following reactant 1.63g of NH3 is reacted with 3.47g of cl2. How much of the excess reactant is used
$20.00
Chemistry
Waiting for answer
-
The following table lists molar concentrations of seven major ions in seawater. Using a density of 1.022 g/mL for seawater, convert the concentrations for the two ions in the question below into molal
$15.00
Chemistry
Answered
-
Why do molecular compounds of low molecular weight tend to be gases at room temperature why not ci2?
$12.00
Chemistry
Answered
-
Neutron activation analysis for a sample of a rock revealed the presence of 140 56ba ,which has a half-life of 12.5 days . assuming the isotope was freshly separated from its decay products, what is t
$12.00
Chemistry
Answered
-
If 100 grams of copper (cu) completely react with 25 grams of oxygen to form only cuo with no reactant left over, how many grams of cuo will form from 140 grams of copper and excess oxygen?
$15.00
Chemistry
Waiting for answer
-
A zero-order reaction has a constant rate of 1.80×10−4 m/s. if after 35.0 seconds the concentration has dropped to 5.00×10−2 m, what was the initial concentration?
$50.00
Chemistry
Answered
-
Plato! In this redox reaction, identify the reducing agent. 2MgO---> 2Mg + O2 1)H2O 2)Mg 3)Mg0 4)0
$12.00
Chemistry
Answered
-
Determine the freezing point of a solution that contains 58.8 Napthalene dissolved in 360ml of Benzene (d= .877 g/ml) Pure Benzene has a melting point of 5.50 C and a freezing point depression constan
$20.00
Chemistry
Answered
-
I am stuck on the following question:A reinforced concrete column 300 mm square supports a direct load of 2.2 MN. What is the compressive stress in the column? I tried using this equation:But my answe
$12.00
Chemistry
Waiting for answer
-
Determine the amount of heat needed to convert 250 grams of ice at -9.50 degrees to water at 45 C degree?
$35.00
Chemistry
Answered
-
Which of the following is congruent with the figure above? Click the image below until you find the correct image.
$15.00
Chemistry
Waiting for answer
-
Write the mechanism for the two steps of the hydroboration/oxidation reaction of indene.please with details ?
$15.00
Chemistry
Answered
-
When the fission of uranium-235 is carried out, about 0.1 percent of the mass of the reactants is lost during the reaction. What happens to this “lost” mass? It is converted into another element.
$10.00
Chemistry
Waiting for answer
-
You made a 100.0 mL of a lead(II) nitrate solution for lab but forgot to cap it. The next lab session you noticed that there was only 80.0 mL left (the rest had evaporated). In addition, you forgot th
$15.00
Chemistry
Answered
-
You could add aquous hydrochloric to the solution to precipitate out silver chloride. What volume of a 0.130 M aqueous hydrochloric solution is needed to precipitate the silver ions from 30.0 mL of a
$35.00
Chemistry
Answered
-
The molecular scenes below illustrate two different mixtures. when mixture a at 273 k is heated to 473 k, mixture b results
$15.00
Chemistry
Answered
-
How many moles of magnesium hydroxide are needed to produce 74.7 milliliters of water, if the density of water is 0.987 g/mL? Show all steps of your calculations as well as the final answer. HNO3 + M
$20.00
Chemistry
Waiting for answer
-
How many grams of glucose (FW = 180.16 g/mol) are in 10.0 mL of a 0.25 M solution of glucose in water?
$20.00
Chemistry
Answered
-
Newborn Infants require 80 mg of Cu per kilogram of body mass per day . The Cu content of a popular baby formula is 0.48 mg of Cu per milliliter. How many milliliter should 7.0 lb baby consume per day
$20.00
Chemistry
Waiting for answer
-
How many liters of fluorine gas, at standard temperature and pressure, will react with 23.5 grams of potassium metal? Show all of the work used to solve this problem. 2K + F2 yields 2KF
$12.00
Chemistry
Answered
-
Predict how the addition of a catalyst would affect the rate of the reaction below, and explain your prediction H2 (g) + I2 (g) yields 2 HI
$50.00
Chemistry
Answered
-
When sensitivity of the balance is taken into account the two values obtained for the unknown mass are considered to be
$35.00
Chemistry
Answered
-
What is the third step of the hydrogen fusion process? A. + → + e+ + v + energy B. + → +2 + energy C. + → + energy D.6 + 2 → + 2 + energy + 2v
$10.00
Chemistry
Answered
-
A sponge and a bar of soap occupy the same amount of space, but the soap is much more dense than the sponge? The soap has a greater volume than the sponge. The soap has more mass than the sponge. The
$20.00
Chemistry
Answered
-
What are some applications of the field of spectroscopy? Check all that apply. for identifying elements in a sample for determining the distance and velocity of galaxies for producing neon lights for
$10.00
Chemistry
Waiting for answer
-
Identify the number of significant figures (sig figs) in each of these values. note: if any part of this question is answered incorrectly, a single red x will appear.
$12.00
Chemistry
Waiting for answer
-
Calculate the cal (kcal) in 1 cup of whole milk that contains 12g of carbohydrates, 9g of fat and 9g of protein
$20.00
Chemistry
Waiting for answer
-
A subset of patients with DLD deficiency experience muscle cramps after exercise. Based on your knowledge of the regulation of glycolysis and/or TCA why would this symptom appear. HINT: your answer
$10.00
Chemistry
Waiting for answer
-
A 48.10-mL sample of an ammonia solution is analyzed by titration with HCl. The reaction is given below. NH3(aq) + H +(aq) → NH4+(aq) It took 39.56 mL of 0.0963 M HCl to titrate (react completely wi
$35.00
Chemistry
Waiting for answer
-
A 100.0-ml sample of water is heated to its boiling point. how much heat (in kj) is required to vaporize it? (assume a density of 1.00 g>ml.)
$20.00
Chemistry
Answered
-
How much heat energy is produced by 0.5 Wh of electrical energy? A. 2.6 Btu B. 0.4 Btu C. 1.7 Btu D. 0.15 Btu
$20.00
Chemistry
Waiting for answer
-
The pk of phospohirc acid is 7.21. what isthe useful buffering range of this acid and its conjugate base
$20.00
Chemistry
Waiting for answer