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Questions (99)

What is the difference between poems and poetry?
1. 2 answers
2. 948 views
Does knowledge acquired in highschool liberate or hinder studnets?
1. 5 answers
2. 413 views
Does knowledge acquired in highschool liberate or hinder students?Please help explain the question and your opinion.
1. 3 answers
2. 398 views
You have 2.0 g of solid A, 100.00 mL of water (100.0 g of water), and the total mass of solid A combined with 100.00 mL of water
1. 4 answers
2. 458 views
1)The reaction of methane and oxygen yields carbon dioxide gas and water. The unbalanced reaction is as follows: CH4(g) +
1. 4 answers
2. 2,340 views
A. What is the mass of Solution 3? in gB. What is the density of Solution 2? g/ml solution 1: Mass Empty Flask (g):42.252 Mass
1. 2 answers
2. 637 views
An auditorium measures 35.0 m multiplied by 15.0 m multiplied by 5.0 m. The density of air is 1.20 kg/m3. What is the weight of
1. 3 answers
2. 466 views
An automobile tire is rated to last for 60,000 miles. To an order of magnitude, through how many revolutions will it turn?i put
1. 1 answer
2. 1,227 views
Infrared, ultraviolet, and visible radiation are all part of the electromagnetic spectrum.Arrange the three types of radiation
1. 3 answers
2. 751 views
1)14 moles of Ar 12 moles of N2 2 moles of BF3 If the total number of mol present in the mixture visualized is 1.43, calculate
1. 3 answers
2. 399 views
If the ratio of the rate of effusion of an unknown gas to that of CO under the same conditions is 0.7978, calculate the molar
1. 1 answer
2. 470 views
Using the balanced equation, determine the number of NaNO3 units in the visualization in the reaction.3Ca(NO3)2(aq) +
1. 2 answers
2. 604 views
Calculate the molality (m) of CH2Cl2 in a solution generated by combining 846 g of the solute CH2Cl2 with 11.2 L of the solvent
1. 2 answers
2. 490 views
How do the bond angles in the six atom ring (created when ASA binds to Fe3+) differ fromthe bond angles of the six atom benzene
1. 2 answers
2. 527 views
Why isn’t the six atom ring created when ASA binds to Fe3+ flat like the benzene ring?is it because that Fe3+ distorted the
1. 1 answer
2. 422 views
1)An increase in temperature ____________ the kinetic energy and average speed of the gas particles.A. decreases B. increases
1. 2 answers
2. 561 views
If 6.38 g of a polyethylene glycol is dissolved in 7550 ml of water at 300 oK, the solution has an osmotic pressure of 0.171
1. 3 answers
2. 489 views
A 4.14 m solution of the solute methylene chloride dissolved in the solvent ethanol is available. Calculate the mass ( kg ) of
1. 2 answers
2. 537 views
Transfer the tablet to a clean 125-mL Erlenmeyer flask. Add 10-mL of 1M NaOH and heat the mixture to a gentle boil. Once the
1. 1 answer
2. 607 views
If 1373 g of a substance is dissolved in 2315 g of cyclohexane solvent, the boiling point of the solution is 87.69 oC. Calculate
1. 3 answers
2. 525 views
If 1373 g of a substance is dissolved in 2315 g of cyclohexane solvent, the boiling point of the solution is 87.69 oC. Calculate
1. 2 answers
2. 554 views
1)gaseous sulfur trioxide and gaseous nitrogen monoxide form when gaseous sulfur dioxide and gaseous nitrogen dioxide react.2)En
1. 4 answers
2. 611 views
Based on the balanced equation,10Li + N2F4 → 4LiF + 2Li3N calculate the formula units of LiF formed when 54 molecules of N2F4
1. 2 answers
2. 580 views
Based on the balanced equation2I2O5 + 10NO → 5N2O4 + 2I2 calculate the number of excess reagent units remaining when 188 I2O5
1. 2 answers
2. 484 views
Based on the balanced equation2Al + 6HCl → 2AlCl3 + 3H2 calculate the number of excess reagent units remaining when 140 Al
1. 4 answers
2. 1,992 views
Based on the balanced equation2Ba + O2 → 2BaO calculate the number of BaO formula units formed when 142 Ba atoms and 73 O2
1. 3 answers
2. 1,538 views
If 600 mL of 1.05 M aqueous CaCl2 and 720 mL of 0.792 M aqueous Na3PO4 are reacted stoichiometrically according to the balanced
1. 1 answer
2. 459 views
for NaTl, is the unit cell of it based on the repetition of body centered cubic and the holes in this unit cell are octahedral?h
1. 2 answers
2. 503 views
for NaTl, is the unit cell of it based on the repetition of body centered cubic and the holes in this unit cell are octahedral?
1. 2 answers
2. 516 views
1) Calculate the specific heat capacity (J/g oC) of iron, if a 803 g sample lost 937.4 J of heat energy in going from an initial
1. 3 answers
2. 564 views
1)RuO2 is molecular, but why is it insulator even though Ru is metal?2)Why is TiO ionic? I thought only group 1 and 2 would make
1. 2 answers
2. 621 views
what if compound has those metalloids(metal near stair case) with gas element, is it going to be semiconductor. Can you think of
1. 3 answers
2. 385 views
is CaO soluble
1. 1 answer
2. 393 views
Liquid quinoline reacts according to the balanced equation. When 1200 g of C9H7N is reacted, calculate the sign and magnitude
1. 1 answer
2. 476 views
Gaseous carbon monoxide reacts according to the balanced equation. If a total of 1040 kJ of heat is generated in the reaction as
1. 2 answers
2. 522 views
why is lim of tanx as x approaches to (pie/2)+ is negative infinity. Shouldnt it be positive infinity since pie/2 is approaching
1. 2 answers
2. 506 views
if a particle has work of 8J and doubles its speed. how much work it has done? Can we still determine work in this problem
1. 4 answers
2. 1,216 views
if velocity vector is changing but speed is constant, can there still be work
1. 1 answer
2. 292 views
2 mol of solid iron (C = 25.1 J/(mol K)) is heated from 20C to 200C. How much does its internal energy change?U = q +W but no
1. 3 answers
2. 395 views
lets just say that 5g of solid benzoic acid burns under gaseous oxygen atmoshphere. Temperature increases from 20c to 50c. So is
1. 3 answers
2. 524 views
by the way, how can you tell if work is 0 for 2 mol of solid iron (C = 25:1 J/(molK)) is heated from 20C to 200C. How much does
1. 1 answer
2. 352 views
Why is HF has lower boiling point than CsI, even though HF has hydrogen bond.Does HF have higher boiling point than O2
1. 2 answers
2. 550 views
did i order the intermolecular forces correctlyion-ion > ion-dipole force > dipole-dipole >ion-induced dipole> dipole-induced
1. 2 answers
2. 942 views
is Li3As a semiconductor
1. 1 answer
2. 304 views
Does the basicity decreases as going down the column and right across the periodic table? How does the size of an element or
1. 2 answers
2. 612 views
A 1.00 L volume of 0.609 M HNO3 is condensed to a volume of 0.750 L, calculate the molarity (M) of H+ in the new solution
1. 1 answer
2. 399 views
please check my answer(one with star). The solubility of borax is directly proportional to temperature. Therefore, the sign of H
1. 3 answers
2. 513 views
If 0.0490 mol of solid Al reacts stoichiometrically according to the balanced equation with 990 mL of aqueous Cl-, what molarity
1. 5 answers
2. 649 views
When a reaction mixture with a total volume of 1750 mL that is 0.0263 M aqueous K+ was stoichiometrically produced as per the
1. 2 answers
2. 930 views
When a reaction mixture with a total volume of 1720 mL that contains 0.605 L of gaseous CO2 measured at STP dissolved in 940 mL
1. 4 answers
2. 728 views
If 6.01 g of K2SO3 dissolved in 930 mL of water reacts stoichiometrically according to the balanced equation in a reaction
1. 2 answers
2. 620 views
If 0.755 g of Al3+ dissolved in 960 mL of water reacts stoichiometrically according to the balanced equation, what volume (mL)
1. 2 answers
2. 616 views
If 0.836 g of solid Al reacts stoichiometrically according to the balanced equation in a reaction solution with a total volume
1. 2 answers
2. 598 views
When a reaction mixture with a total volume of 1390 mL that is 0.00791 M aqueous Ba2+ was stoichiometrically produced as per the
1. 1 answer
2. 623 views
sorry to repost this question but i'm confused on this partThe solubility of borax is directly proportional to temperature.
1. 2 answers
2. 975 views
The freezing point of a solution isA. lower than the freezing point of the solvent alone because higher temperature is required
1. 2 answers
2. 576 views
Which of the following is NOT true of colligative properties? Colligative properties are...A. dependent on the mass of solute
1. 3 answers
2. 629 views
Why doesn't potassium ion K+ from KMnO4 appear in the following two unbalanced equations: MnO4– + C2O42– Mn2+ + CO2MnO4– +
1. 2 answers
2. 655 views
Wich of the following is NOT true about the blank for the experiment, 'Analysis of a Complex Iron Salt'?A. A blank is titrated
1. 2 answers
2. 1,175 views
when finding area, what does it mean when it says that the function is below by the x-axis, can you give me example of this
1. 1 answer
2. 327 views
how do you take log(-63)
1. 1 answer
2. 261 views
From the Standard Potential Table in your general chemistry textbook: Which reaction has been chosen as the 'standard' against
1. 5 answers
2. 444 views
For the cell: C(s) C+(aq) B+(aq) B(s).Metal ______ is the "negative" electrode. is it C(s)
1. 4 answers
2. 540 views
in an adiabatic process from A to B, do A and B have same temperature?
1. 1 answer
2. 359 views
what does it mean by in phase and out of phase for orbitals. Is in phase means that it's bonding and out of phase is
1. 2 answers
2. 636 views
Which equation describes the relationship between the rates at which Cl2 and F2 are consumed in the following reaction?a)-d(Cl2)
1. 2 answers
2. 536 views
Which equation describes the relationship between the rates at which Cl2 and F2 are consumed in the following reaction?Cl2(g) +
1. 2 answers
2. 1,239 views
Which of the following will be affected by the addition of a catalyst to a chemical reaction?a)the value of the reverse rate
1. 5 answers
2. 700 views
Which equation describes the relationship between the rates at which Cl2 and F2 are consumed in the following reaction?Cl2(g) +
1. 2 answers
2. 775 views
A 50-mL Mohr buret is connected to a 1-ft length of capillary tubing. The buret is then filled with water and the volume of
1. 4 answers
2. 625 views
Which of the following rate laws suggests that the reaction probably occurs in a single step?why is this problem cant be answer
1. 1 answer
2. 513 views
Which of the following rate laws suggests that the reaction probably occurs in a single step?why is this problem cant be answer
1. 2 answers
2. 539 views
when do we have pka=ph
1. 1 answer
2. 305 views
do we have buffering region and ph=pka in any of these conditions:strong base vs strong acid strong base vs weak acid weak base
1. 1 answer
2. 1,075 views
for both of these objectsystem1: earth and ball if a ball is falling down, is the work done on it positive since force and
1. 1 answer
2. 424 views
if the system is a basket,the basket is tied to a rope and it is stopped by a fixed clamp when it is falling down, I know there
1. 1 answer
2. 360 views
how do i write this reaction in cell notationI2(s) + 2MnO4-(aq) + 4H+(aq) → 2IO3-(aq) + 2Mn2+(aq) + 2H2O(l)
1. 1 answer
2. 472 views
for the reaction, determine the number of transferring electrons so then i can pug into G=-nFEI'm assigning charges to each of
1. 4 answers
2. 573 views
Pt(s) | Mn2+(aq), MnO4-(aq), H+(aq) || H+(aq), IO3-(aq) | I2(s) | Pt(s)Pt(s) | Mn2+(aq) | MnO2(s) | H+(aq) || H+(aq) || PbO2(s)
1. 4 answers
2. 862 views
A balanced equation that represents an overall cell reaction is shown. Choose the cell notation which corresponds to the
1. 2 answers
2. 572 views
The electrochemical cell described by the cell notation has a standard cell potential of -0.35 V. Calculate the Wmax (kJ) the
1. 2 answers
2. 544 views
The electrochemical cell described by the cell notation has a standard cell potential of -0.35 V. Calculate the Wmax (kJ) the
1. 2 answers
2. 601 views
can you what is G and G knot in terms of spontaneity and chemical equilibrium. I know that G is spontaneous when is negative but
1. 1 answer
2. 348 views
HCl (aq) + Cu (s) + HNO3 (aq) yield CuCl2 (aq) + NO (g) + H2O (l)do i say that HNO3 is oxidizing agent or just N+5 is the
1. 3 answers
2. 728 views
CoSO4 + KI + KIO3 + H2O  Co(OH)2 + K2SO4 + I22KI yield I2 + 2e 2KIO2 10e yield I2 are there 10 electrons being transferred or
1. 2 answers
2. 1,027 views
what is the device called for eye laser surgery and do you know which company use it
1. 1 answer
2. 377 views
what is the device used called for eye laser surgery and do you know which company use it
1. 3 answers
2. 458 views
in a skew symmetric, how do we explain that its diagonal entries has to be all 0 without giving examples to support it
1. 3 answers
2. 455 views
for a strict triangular form, does it has to be in I matrice or just the main diagonal entries are all 1]\
1. 2 answers
2. 729 views
how is this series 3+ 9/4 +27/16 +81/64... is converge to 12?i represent the series as 3^(n+1)/4^n n starts from 0 to infinity,
1. 4 answers
2. 1,676 views
how do i represent 1/(1+x^4) in general taylor polynomial. I know the pattern is 1-x^4+x^8-x^16..... I don't know how to
1. 1 answer
2. 1,052 views
how do i represent 1/(1+x^4) in general taylor polynomial. I know the pattern is 1-x^4+x^8-x^16..... I don't know how to
1. 1 answer
2. 383 views
how do i represent 1/(1+x^4) in general taylor polynomial. I know the pattern is 1-x^4+x^8-x^16..... I don't know how to
1. 2 answers
2. 1,182 views
for this infinite series (-1)^n/n^2if i use alternating series test to show that sequence does of a^n does not go to 0, then
1. 1 answer
2. 765 views
are both ER and secretory vesicles have double bilayer membrane
1. 1 answer
2. 329 views
how do i calculate the pressure of a pipe with same area and constant velocity. I tried to use bernoulli's equation but it only
1. 1 answer
2. 441 views
Input range: -100mV to +60mVVoltage supplies to the op-amp= ±15V how do we find the input offset voltage?
1. 2 answers
2. 489 views
if i use 30 ul from a total volume of 600ul to get 40ug/ml. So to get the total ug only, do i take
1. 1 answer
2. 321 views
if i use 30 ul from a total volume of 600ul to get 40ug/ml. So to get the total ug only, do i take
1. 1 answer
2. 366 views

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