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Jazmin
Questions and answers by visitors named
Jazmin
Questions (122)
Assume equal aqueous concentrations of each of the following substances. Which has the lowest freezing point?
C2H12O6 CH3OH
5 answers
4,613 views
IF 80mg of a radioactive element decays to 10mg in 30 minutes, the half-life of this element is
a.10 min b.20 min c.30 min d.40
6 answers
5,808 views
The company you work for plans to release a waste stream containing 7 mg/L
of benzaldehyde . Assuming that benzaldehyde degrades
4 answers
2,374 views
Arrange the digits 1-9 in 3 rows and 3 colums, in such a way that each row across and down has the same total. Hint: each row
2 answers
706 views
Plese can you help me with this:
describe your strategy for factoring a polynomial, give an example showing all of you steps
2 answers
504 views
Similies
1. As innocent as a lamb Metaphors 1. Love is a lemon-either bitter or sweet 2.Life is a mere dream,a fleeting shadow on
1 answer
441 views
Metaphors
1. Love is a lemon-either bitter or sweet this is the only one i couldn't find an answer to please help me thank you.
4 answers
1,632 views
Analogies
1.Advent:arrival::exaggeration:____ 2.Allude:hint::____:self evident I need help making similies i don't quite
1 answer
425 views
I need help understanding how population pyramids work. I know that the age groups go up and down, and that the gender and how
1 answer
470 views
how long would a tulip live if it had salt mixed in with its water?
1 answer
284 views
what is the symbol of the element with 4d^4?
1 answer
356 views
how many outer electrons are there in [Ar] 4s^1?
1 answer
287 views
How many CO2 molecules would be formed from the reaction mixture that produces the greatest amount of products?
2CH3OH(g)+3O2(g)-
4 answers
13,500 views
a solution weighs 44grams. this sample contains 12grams of salt calculate % m/m salt.
3 answers
1,180 views
5.50 grams of nitrogen triiodide are detonated in a closed 7.00 L flask that was under full vacuum initially. The nitrogen
2 answers
690 views
Chlorine is used to disinfect drink water supplies and pool water. Suppose you have 17.3 L of Cl2 in a cylinder at 1200 torr and
1 answer
427 views
The gas constant (R) has many different unit formulations. Convert the value of 8.314 (m3-Pa)/(K-mol) into units of
1 answer
333 views
I was wondering if someone can tell me if I did this right:
The gas constant (R) has many different unit formulations. Convert
1 answer
447 views
I was wondering if someone can tell me if I did this right:
The gas constant (R) has many different unit formulations. Convert
2 answers
496 views
Suppose you have a mixture of hydrogen and methane (CH4) gases that are at equilibrium. What is the ratio of the average speed
1 answer
514 views
the enthalpy change when a strong acid is neutralized by base is -56.1 kJ/mol.
If 135 ml of .450 M HI at 23.15 C is mixed with
4 answers
3,128 views
Suppose you add 81 ml of dilute acid to 54 ml of water. Both the water and acid were at room temperature (22 C) before being
2 answers
502 views
100g of a clear liquid is evaporated and a few grams of white
crystals remain. The original liquid wasa a) heterogeneous compound
4 answers
2,190 views
Styrene, C8H8, is one of the substances used in the production of synthetic rubber. When styrene burns in oxygen to form carbon
4 answers
3,703 views
In a sample of solid Al(NO3)3, the ratio of aluminum ions to nitrate ions is (1) 1:1 (2) 1:2 (3) 1:3 (4) 1:6
4 answers
3,290 views
How much of a 0.23 M NaOH solution is needed to neutralize 27 mL of a 0.85 M sulfuric acid solution? The units are mL.
Can you
2 answers
631 views
What is the wavelength of radiation that has a frequency of 6.912 × 10^14 s−1?
and does the s-1 make a difference? Thank you!
2 answers
1,103 views
How many valence shell electrons are there in a ground state silicon atom?
Am i suppose to just count the electrons after the
2 answers
647 views
A 52.0 g piece of copper at 110.0 C is placed in 75.0 g of water at 20.0 C. What is the temperature (in C) of the water once the
1 answer
386 views
How much of a 0.23 M NaOH solution is needed to neutralize 27 mL of a 0.85 M sulfuric acid solution? The units are mL
1 answer
396 views
Suppose you have a 10 watt fluorescent light bulb. If this light bulb is 6 % efficient in turning electricity into light, then
2 answers
506 views
where are you helping from? I'm just curious
9 answers
563 views
find point(s) on the graph of the function f(x) = x^3 - 2 where the slope is 3
5 answers
1,462 views
Which atom has a larger atomic radius, Ca or Ra? Why?
2 answers
649 views
differentiate: y = 2x/1 - 3x^2
1 answer
310 views
A covalent bond forms when
(1)two nuclei share electrons in order to achieve a complete octet of electrons (2) atoms form ions
3 answers
2,253 views
order the fractions from greates to least. 1/6, 2/7, 1/5.
Can anyone help and explain this to me please
6 answers
954 views
which substance has a definite shape and a definite volume at STP ?
(1)NaCl(aq) (2)Cl2(g) (3)CCl4(l) (4)AlCl3(s) is it 4 because
5 answers
4,480 views
As a substance changes from liquid to gas, the average distance between molecules (1) decreases (2)increases
(3) remains the same
4 answers
1,525 views
which phase change is endothermic ?
(1)gas-->solid (2)gas-->liquid (3)liquid-->solid (4)liquid-->gas
4 answers
2,687 views
the difference between the boiling point and the freezing point of pure water at standard pressure is
(1)32 K (2)273 K (3)100 K
3 answers
649 views
the difference between the boiling point and the freezing point of pure water at standard pressure is
(1)32 K (2)273 K (3)100 K
5 answers
2,798 views
How do you get : x=1/3y+2 in the y=mxtb form ?
1 answer
267 views
Ammonia gas can be prepared by the reaction CaO(s) + 2NH4Cl(s) -> 2NH3(g) + H2O(g) + CaCl2(s) If 112 g CaO reacts with 224 g
3 answers
1,400 views
Ammonia gas can be prepared by the reaction CaO(s) + 2NH4Cl(s) -> 2NH3(g) + H2O(g) + CaCl2(s) If 112 g CaO reacts with 224 g
3 answers
986 views
Copper reacts with sulfuric acid according to the following equation: 2H3SO4 + Cu-> CuSO4 + 2H2O + SO2 How many grams of sulfur
4 answers
1,677 views
Groundwater in Pherric, New Mexico, initially contains 1.800 mg/L of iron as Fe3+. What must the pH be raised to in order to
3 answers
1,883 views
Calculate the "exact" alkalinity of a water that contains 0.6580 mg/L of bicarbonate, as the ion, at a pH of 5.66.
2 answers
735 views
One liter of a gas mixture at 0 degree Celsius and 108.26 kPa contains 250 mg/L of H2S gas. Calculate the partial pressure
4 answers
1,107 views
Convert the concentration of SO2 from 80µg/m^3 to units of parts per million. The gas has temperature of 25 degree Celsius and
3 answers
676 views
A chemical is placed in a beaker containing 20 g of soil and 500 mL of water. At equilibrium, the chemical is found in the soil
4 answers
1,497 views
The anchor shackle supports a cable force of 600 lb. If the pin has a diameter of 0.25 in., determine the average shear stress
3 answers
859 views
A municipal landfill has available space of 16.2 ha at an average depth of 10
m. Seven hundred sixty-five (765) m3 of solid waste
4 answers
3,519 views
Each month the Speedy Dry Cleaning Company buys one barrel (0.160 m3)
of dry cleaning fluid. Ninety percent of the fluid is lost
4 answers
1,943 views
Each month the Speedy Dry Cleaning Company buys one barrel (0.160 m3)
of dry cleaning fluid. Ninety percent of the fluid is lost
2 answers
710 views
If boron hydride, B4H10, is treated with pure oxygen, it burns to give B2O3 and H2O.
2 B4H10(s) + 11 O2(g) 4 B2O3(s) + 10
1 answer
1,001 views
Another “grand challenge” for engineering is managing the nitrogen cycle. Use the nature of the chemical bond in diatomic
4 answers
1,023 views
100 lb of loose gravel can fill a 1-ft^3 box. Its specific gravity is 2.68. What is the dry rodded weight?
4 answers
1,210 views
If 14.8 kJ of heat is given off when 1.6 g of HCl condesses from vapor to liquid, what is the delta Hcond. for this substance?
5 answers
3,289 views
Estimate the chronic daily intake of 1,1,1-trichloroethane from exposure to
city water supply that contains a
1 answer
875 views
The solubility of NaCl in water is 35.7g NaCl/100g H2O. Suppose that you have 500.0g of NaCl. What is the minimum volume of
2 answers
595 views
The solubility of NaCl in water is 35.7g NaCl/100g H2O. Suppose that you have 500.0g of NaCl. What is the minimum volume of
5 answers
4,133 views
Lake Kickapoo, TX, is approximately 12 km in length by 2.5 km in width.
The inflow for the month of April is 3.26 cubic meter per
4 answers
1,390 views
(10 Points) A contractor is trying to estimate the distance to be expected of a drawdown
of 4.81 m from a pumping well under the
3 answers
963 views
(10 Points) A water initially contains 50 mg/L of Mg
2+ The pH of the water is increased . until the concentration of hydroxide
1 answer
422 views
which is the adjective in the sentence.
Our house is built from wood. can any help, by the way if theres no adjective its fine
6 answers
429 views
The pH of a 0.10 M solution of ammonia is 11.1. Find the hydroxide concentration.
3 answers
666 views
Write a balanced chemical equation for the overall cell reaction represented as:
a) Ag(s)|Ag^+(aq)||Sn^4+(aq), Sn^2+(aq)|Pt(s) b)
4 answers
2,499 views
Write a balanced chemical equation for the overall cell reaction represented as:
a) Ag(s)|Ag^+(aq)||Sn^4+(aq), Sn^2+(aq)|Pt(s) b)
1 answer
675 views
Azomethane, CH3NNCH3, is not a stable compound, and once generated, it decomposes. The rate of decomposition was measured by
1 answer
513 views
I do not know how to rationalize this:
2(-2/radical 77)(77/73)......the answer is -4 radical 77/73 Thank you!!!
1 answer
335 views
Last month, your electric bill was $25.32 for 450 kilowatt-hours of electricity. At that rate, what would be the bill for 240
2 answers
579 views
what is the primary result of a fisson reaction ?
1 conversion of mass to energy 2 conversion of energy to mass 3 binding
2 answers
547 views
compared to an ordinary chemical reaction, a fission reaction will
1 release smaller amounts of energy 2 release larger amounts
7 answers
6,189 views
which process occurs in a controlled fusion reaction?
1 light nuclei collide to produce heavier nuclei. 2 heavy nuclei collide to
1 answer
497 views
which process occurs in a controlled fusion reaction?
1 light nuclei collide to produce heavier nuclei. 2 heavy nuclei collide to
3 answers
4,918 views
a radioisotope is called a tracer when it is used to
1 kill bacteria 2 kill cancerous cells determine the age of animal skeletal
3 answers
1,236 views
which isotope can be used as a tracer to study the age of organic material ?
1 C-12 2 C-14 3 Tc-99 4 U-238
2 answers
968 views
radiated food can be safely stored for a longer time because radiation
1. prevents air oxidation 2. prevents air reduction 3.
3 answers
1,375 views
K-42 has a half-life of 12.4 hours. If you begin with 250g of
K-42, determine how much you will have left after 4 half-lives. How
2 answers
833 views
Turn "theta = 2" into rectangular form.
1 answer
313 views
which of the following 10 g samples will decay the most in 28 days?
a.P-32 b.Kr-85 c.Fr-220 I-131 the answer is c.Fr-220 but i
1 answer
388 views
determine the value of N:
N/20 * 100%=60% can someone explain
1 answer
404 views
What place value is ten times smaller than ten millions place?
A) hundred trillion B) one trillion C) hundred billion D) ten
3 answers
429 views
Israel has 72 apples.12of them are red .What percentage of the apples are red
2 answers
466 views
Kayla is 5 feet tall, and Maria is 5.5 feet tall. Kayla's shadow at 3pm outdoors measured 3feet. The length of each persons
3 answers
535 views
a 0.2kg rubber ball is dropped from the window of a building. It strikes the sidewalk below at 30 m/s and rebounds up at 25 m/s.
4 answers
1,797 views
a skier moving at 15 m/s down a 20 degree slope encounters a region of wet snow of coefficient of friction is 0.8. how far down
3 answers
813 views
a 0.2kg rubber ball is dropped from the window of a building. It strikes the sidewalk below at 30 m/s and rebounds up at 25 m/s.
3 answers
1,133 views
A 6.7 kg package starts from rest and slides down a mail chute that is 50 m long and has a vertical drop of 10m. If the velocity
1 answer
470 views
Jeremy got scores of 93,82,91, and 88 on his first four math test. What score must he get on the fifth test to have an average
4 answers
682 views
Treasure Mountain International School in Park City, Utah, is a public middle school interested in raising money for next year's
3 answers
1,793 views
How does estimating help you add two digit numbers
1 answer
399 views
A 33.3 kg cyclist is riding a 10.7 kg bicycle at a velocity of 7.0 m/s. If the cyclist applies a brake that applies a force of
3 answers
549 views
A snack bar sells ice snow cones. An ice cube has a side length of 24 centimeters.after shaved all linear dimensions of the ice
1 answer
484 views
On a test you answered six 5-point questions and eight 2-point questions. You earned 92% of the possible points. How many points
6 answers
1,648 views
Javier rides his bicycle at a rate of 15 miles per hour. Javier's speed is equivalent to _____ ft per speed.
7 answers
2,505 views
Which of the following transformations preserves the measures of the angles but changes the lengths of the sides of the figure?
3 answers
871 views
Healthy people 2020 includes a set of of objectives aimed at reducing risky health behaviors. A major focus is on _____ -taking
5 answers
1,422 views
What does a file extension tell you?
A. what the file is about B. where the file is located C. what type of file it is D. who
2 answers
714 views
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