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Ivy
Questions and answers by visitors named
Ivy
Questions (104)
A pan with four eggs weighs 18 ounces. A pan with eight eggs weighs 24 ounces. What is the weight of the pan?
6 answers
653 views
1. What volume will a mixture of 5.00 mol of H2 and 0.500 mol of CO2 occupy at STP?
4 answers
714 views
Calculate the wavelength of light that must be absorbed by hydrogen atom in its ground state to reach the excited ste of
4 answers
2,535 views
Using a lever, a person applies 60 N of force and moves the lever 1 m. This moves a 200 N rock at the other end by 0.2 m. What
4 answers
566 views
Write the equation of the tangent at (2,2) to the curve x^2-2xy+y^2+2x+y-6=0
Can anyone please give me some ideas to do
4 answers
523 views
A cobble-sized sediment is naturally broken off the steep sides of a valley in a mountainous region. The sediment falls onto a
4 answers
2,697 views
1. Lead (Pb), has a density of 11.35 g/ml. If I have 3.45 cc of lead, what is the weight in
grams? 4. I am traveling at 100 mph
2 answers
878 views
which illustrates in an increase in potential energy?
a. a firecracker explodes b. a person climbs a set of stairs c. a wind-up
3 answers
976 views
Why is it important to clear a neurotransmitter quickly from the synaptic cleft? What might happen to the target muscle cell if
1 answer
501 views
What condition triggers its release(e.g., glucose in blood)
1.Thyroid hormone 2.ADH 3. Aldosterone 4. Epinephrine 5. Melatonin 6.
1 answer
409 views
Parathyroid hormone and calcitonin are synthesized where?
1 answer
451 views
The 16th term of an Arithmetric Progression is four times the 36th term, and exceeds it by 32. Finda the numbers.
2 answers
501 views
Other than a specific confirmatory test, give a simple test that would allow you to distinguish between the following pairs of
2 answers
541 views
1. What is the Kelvin temperature of a system in which 4.50 mol of a gas occupy 0.250 L at 4.15 atm?
2. In the lab, students
2 answers
1,297 views
Consider the following equation:
4NH3(g) + 5O2(g)----> 4NO(g)+6H2O(g) a. How many liters of oxygen are required to react with 2.5
4 answers
4,216 views
balance molecular formula, total ionic formula and net ionic formula of Sr(NO3)2 + Al2(SO4)3. Thank you
1 answer
474 views
balance molecular formula, total ionic formula and net ionic formula of Sr(NO3)2 + Al2(SO4)3. Thank you
3 answers
1,609 views
1. If 25 grams of Iron (III) hydroxide is dissolved in a 500mL volumetric flask, what is the Molarity of the solution?
2. An
2 answers
1,279 views
An unknown metal has a volume of 5.25 mL and a density 2.71 g/mL. What is
the weight of the metal in grams?
2 answers
497 views
An unknown metal, heated to an unknown temperature until a liquid is dropped
into a calorimeter that has 250 ml of water. The
2 answers
716 views
Your length measurement was 21.34 cm. The ‘accepted value’ was 21.77
cm. What is the percent error of your measurement?
1 answer
469 views
After subtracting the weight of the container, the Vanadium metal inside is
found to weigh 8.34 grams. After reacting with Oxygen
2 answers
483 views
A 19.18 mL of 0.125 M Oxalic Acid (H2C2O42H2O) is titrated with a Ca (OH)2
solution. The initial volume of Ca(OH)2 was 14.38
3 answers
492 views
Determine if the reaction produces a precipitate. For a
precipitate mark ‘a’ and if there is no precipitate mark ‘b’. 8.
2 answers
542 views
Why was there condensation of the beaker of cold water when a blue flame
was passes underneath? This experiment is from the Gas
2 answers
1,277 views
A 21.18 mL of 0.250 M NaOH is titrated with a H2SO4 solution. The initial
volume of H2SO4 was 13.28 and the final volume of H2SO4
3 answers
1,052 views
Which is not a ground state electron configuration?
A. 1s2 B. 1s2 2p1 C. 1s2 2s2 D. 1s2 2s2 2p1
1 answer
392 views
As one descends group 6A of the periodic table, the number of valence electrons
found in each element? A. Increases B. Decreases
1 answer
778 views
A 120. mL sample of a gas is at a pressure of 1.50 atm. If the temperature remains constant,
what will be its volume at 3.50 atm
2 answers
1,068 views
What is the concentration of a HCl solution if 20.0 mL of the solution is neutralized by
15.0 mL of a 0.10 M Ca(OH)2 solution?
1 answer
596 views
What is the concentration of a H2SO4 solution if 10.0 mL of the solution is neutralized by
7.8 mL of a 0.20 M NaOH solution?
4 answers
4,202 views
What is the molarity of the resulting solution when 300. mL of a 0.400 M solution is diluted
to 800. mL?
4 answers
5,945 views
What mass of silver nitrate is dissolved in 40.0 mL of a 0.400 M solution of silver nitrate?
4 answers
2,825 views
What is the mole of oxalic acid?
Equation:H2C2O4 + 2NaOH---> Na2C2O4 + 2H2O *Moles of oxalic acid dihydrate is 0.032 mole. *
3 answers
1,449 views
What is the mole of oxalic acid?
Equation:H2C2O4 + 2NaOH---> Na2C2O4 + 2H2O *Moles of oxalic acid dihydrate is 0.032 mole. *
1 answer
1,206 views
A 21.18 mL of 0.250 M NaOH is titrated with a H2SO4 solution. The initial
volume of H2SO4 was 13.28 and the final volume of H2SO4
1 answer
482 views
As one descends group 6A of the periodic table, the number of valence electrons
found in each element? A. Increases B. Decreases
1 answer
511 views
Which is not a ground state electron configuration?
A. 1s2 B. 1s2 2p1 C. 1s2 2s2 D. 1s2 2s2 2p1
6 answers
2,119 views
You know the solution forms a precipitate when?
(A) when it changes color (B) when you can’t see through it (C) because it
3 answers
348 views
A 21.18 mL of 0.250 M NaOH is titrated with a H2SO4 solution. The initial
volume of H2SO4 was 13.28 and the final volume of H2SO4
2 answers
1,088 views
Which is not a ground state electron configuration?
A. 1s2 B. 1s2 2p1 C. 1s2 2s2 D. 1s2 2s2 2p1
1 answer
407 views
As one descends group 6A of the periodic table, the number of valence electrons
found in each element? A. Increases B. Decreases
2 answers
872 views
Which one in this pair has the larger radius? Explain
a. Calcium atom or calcium ion b. Aluminum ion or Magnesium ion
1 answer
493 views
A sample of propane gas, C3H8, was collected over water at 25 degree Celsius and 745 torr. The volume of the wet gas is 1.25 L.
2 answers
597 views
A sample of propane gas, C3H8, was collected over water at 25 degree Celsius and 745 torr. The volume of the wet gas is 1.25 L.
4 answers
1,655 views
Which one in this pair has the larger radius? Explain
a. Calcium atom or calcium ion b. Aluminum ion or Magnesium ion
3 answers
1,810 views
What volumes will each of the following occupy at STP?
a. 1.80 x 10^24 molecules of SO3 b. 7.5 mol C2H6 c. 25.2 grams chlorine
4 answers
1,342 views
how many molecules of CH4 gas are present in a 1.00 L flask of CH4 gas at STP?
4 answers
1,282 views
A patient’s blood cell count shows 15,000 white blood cells (WBCs) per µL of blood. A normal WBC count is about 9,000
2 answers
547 views
Obesity is defined medically as 20% above a person’s ideal weight. If a person’s ideal
weight is 72 kg, when (above what
2 answers
602 views
If a man’s ideal weight is 165 lbs. and he weighs 185 lbs., how many pounds above his ideal weight is he? What percent above
2 answers
1,297 views
Classify each of the eight living things listed below into one of the two groups according to an important physical
2 answers
1,151 views
For the reaction: C4H10 + O2 �¨ CO2 + H2O ( is this balanced?) , how many moles of CO2 is formed when 5.00 moles C4H10 reacts
3 answers
1,039 views
Fill in the table with information about the action of pharmaceutical drugs on neurological disorders.
Name of drug 1.Valium
1 answer
447 views
Match the poison/drug to the effect.
a. curare b. tetanus toxin c. a-bungarotoxin d. strychnine e. botulinum toxin f. neostigmine
2 answers
524 views
There may be more than one region in which the neurotransmitter is active. Choose one, and make sure your answer in column 4
2 answers
535 views
Compare and contrast the activity of acetylcholine, dopamine, serotonin, and norepinephrine. If the statement applies to more
1 answer
478 views
A sample of propane, \rm C_3H_8, contains 12.8 moles of carbon atoms. How many total moles of atoms does the sample contain?
2 answers
653 views
Calculate each of the following quantities in 0.183 mole {\rm (C_3H_5)_2O}: Find the Atoms of H and C
1 answer
410 views
If you placed the stethoscope on the patient's bracial artery, but did not put the BP cuff on the patient, you wouldnt hear
2 answers
530 views
If Tums is added to 55.0 {\rm mL} of 0.750 {\rm M}{\rm HCl}, how many grams of {\rm CO}_{2} gas are produced?
1 answer
326 views
How many milliliters of 3.60 {\rm M} {\rm HCl} are required to react with 140 {\rm mL} of 1.60 {\rm M}{\rm Al}({\rm OH})_{3}?
3 answers
488 views
what is the meaning of the numeral represented by X in the general formula for hydrate salt * XH2O
4 answers
4,255 views
If 39.2 of 0.177 is required to neutralize completely 22.0 solution, what is the molarity of the acid?
2 answers
552 views
Draw the condensed structural formulas of ethyl alcohol
1 answer
396 views
In your own words, explain the second law of thermodynamics and explain why it is not violated by living organisms?
1 answer
453 views
What happened if you put the Elodea leaf cells in a solution of 0.5% NaCl,1.8% NaCl and 0.9%NaCl?
1 answer
717 views
HOw much energy is required to ionize a mole of Hydrogen atoms?
3 answers
1,566 views
what are the formulas of the salts that may precipitate when the reaction mxture is cooled?
2 answers
524 views
Why does the alkyl halide layer switch from the top layer to the bottom layer at the point where water is used to extract the
1 answer
1,103 views
An ether and an alkene are formed as by-products in this reaction. Draw the structure of these by-products and give mechanism
4 answers
2,080 views
Aqueous sodium bicabonate used to wash the crude n-butyl bromide.
a) What was the purpose of this wash? Give equation. b)Why
4 answers
1,347 views
Why must the alkyl halide product be dried carefully with anhydrous calcium chloride before the distillation?
1 answer
818 views
A parking lot is 60 meters wide and 80 meters long. At $ 15 per square meter, how much will it cost to pave the parking lot?
2 answers
498 views
A swimming pool is 16 meters wide and 25 meters long. At $50 per square meter. how much will a child-proof covering for the pool
2 answers
1,074 views
Why is it important to understand the relationship between nerves and muscles?
1 answer
436 views
if antiseptic hydrogen peroxide is 3% H2O2 by mass, approximately how many moles of H2O2 are present in each gram of antiseptic
2 answers
1,227 views
Rick rides 11 1/8 miles in an hour with his bike in second gear going uphill. If Rick rides downhill in fourth gear he goes 2
4 answers
1,648 views
What is the source of the magma that fuels the island arc complex?
4 answers
599 views
Calculate the pH of .100 of a buffer solution that is .25 M in HF and .50 M in NaF. What is the change in pH on addition of the
2 answers
838 views
Eric is planning a 7-day resort vacation. He will play golf on four mornings. He also wants to play tennis but can only play
2 answers
579 views
A ship sails north, then turns 45° in a clockwise direction. After another hour, it turns clockwise 90°. In which direction is
2 answers
471 views
Write a proportion using an unknown value x and the ratio 5:6 then solve it.
In an orchestra, the ratio of trombones to violas is
5 answers
1,163 views
1. Write a proportion using an unknown value x and the ratio 5:6 then solve it.
5/6 = x/12 6 * 2 = 12 5 * 2 = 10 x = 10 2. In an
4 answers
2,188 views
You train for A race by running at a speed of 6 mph.
A) At this speed, how many minutes does it take for you to run 3.2 miles? B)
4 answers
2,935 views
I need help! We have to create a business and i have no clue what a 'mission statement' is or anything so please help me! (^~*)
1 answer
450 views
When Cheryl goes mountain climbing, she rests every 15 minutes that she climbs if Cheryl’s combined time is 2 hours, how many
2 answers
612 views
What is half of the answer in the sequence:1,1,2,8,3,27,4
3 answers
464 views
Using the graph on world trade and production, which describes the impact increased production in 1932 had on world trade?
While
4 answers
2,375 views
A sales lady earns 12% Commission on goods sold above sh 200,000.Calculate the value of goods sold if she earned sh 14400 as
3 answers
300 views
Facts and details that the author writes clearly in the text are called what?
explicit information obscure information educated
5 answers
869 views
you ran out of money while shopping at the mall, but your friend still have plenty of money. One of them even has her dad's
5 answers
514 views
the Minnesota area was acquired through the Louisiana Purchase. This agreement was between the united states and which of the
10 answers
684 views
how did the clearing of forests by the settlers impact native Americans?
7 answers
450 views
What evidence supports the concept of plate tectonics and explains the movement of the continents?
2 answers
1,191 views
X is partly constant and partly varies as Y when y=2, x=30, and when y=6, x=50
1 answer
255 views
How to contruct the mediator of a line
1 answer
52 views
Determine if 7xv2+y=5 is a linear or nonlinear function.
2 answers
54 views
What role did the Church play in feudal society?
2 answers
101 views
What early kingdoms formed in Europe from the 400s to the 700s?
4 answers
57 views
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