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Jazmin

Questions and answers by visitors named Jazmin

Questions (122)

The company you work for plans to release a waste stream containing 7 mg/Lof benzaldehyde . Assuming that benzaldehyde degrades
1. 4 answers
2. 2,373 views
Assume equal aqueous concentrations of each of the following substances. Which has the lowest freezing point?C2H12O6 CH3OH
1. 5 answers
2. 4,613 views
IF 80mg of a radioactive element decays to 10mg in 30 minutes, the half-life of this element isa.10 min b.20 min c.30 min d.40
1. 6 answers
2. 5,801 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
1. 2 answers
2. 705 views
Plese can you help me with this:describe your strategy for factoring a polynomial, give an example showing all of you steps
1. 2 answers
2. 503 views
Similies1. 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. 1 answer
2. 440 views
Metaphors1. 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.
1. 4 answers
2. 1,632 views
Analogies1.Advent:arrival::exaggeration:____ 2.Allude:hint::____:self evident I need help making similies i don't quite
1. 1 answer
2. 424 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. 1 answer
2. 469 views
how long would a tulip live if it had salt mixed in with its water?
1. 1 answer
2. 284 views
what is the symbol of the element with 4d^4?
1. 1 answer
2. 356 views
how many outer electrons are there in [Ar] 4s^1?
1. 1 answer
2. 287 views
How many CO2 molecules would be formed from the reaction mixture that produces the greatest amount of products?2CH3OH(g)+3O2(g)-
1. 4 answers
2. 13,497 views
a solution weighs 44grams. this sample contains 12grams of salt calculate % m/m salt.
1. 3 answers
2. 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
1. 2 answers
2. 689 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. 1 answer
2. 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. 1 answer
2. 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. 1 answer
2. 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
1. 2 answers
2. 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. 1 answer
2. 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
1. 4 answers
2. 3,126 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
1. 2 answers
2. 502 views
100g of a clear liquid is evaporated and a few grams of whitecrystals remain. The original liquid wasa a) heterogeneous compound
1. 4 answers
2. 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
1. 4 answers
2. 3,702 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
1. 4 answers
2. 3,289 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
1. 2 answers
2. 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!
1. 2 answers
2. 1,102 views
How many valence shell electrons are there in a ground state silicon atom?Am i suppose to just count the electrons after the
1. 2 answers
2. 645 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. 1 answer
2. 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. 1 answer
2. 396 views
Suppose you have a 10 watt fluorescent light bulb. If this light bulb is 6 % efficient in turning electricity into light, then
1. 2 answers
2. 505 views
where are you helping from? I'm just curious
1. 9 answers
2. 562 views
find point(s) on the graph of the function f(x) = x^3 - 2 where the slope is 3
1. 5 answers
2. 1,460 views
Which atom has a larger atomic radius, Ca or Ra? Why?
1. 2 answers
2. 648 views
differentiate: y = 2x/1 - 3x^2
1. 1 answer
2. 309 views
A covalent bond forms when(1)two nuclei share electrons in order to achieve a complete octet of electrons (2) atoms form ions
1. 3 answers
2. 2,249 views
order the fractions from greates to least. 1/6, 2/7, 1/5.Can anyone help and explain this to me please
1. 6 answers
2. 953 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
1. 5 answers
2. 4,478 views
As a substance changes from liquid to gas, the average distance between molecules (1) decreases (2)increases(3) remains the same
1. 4 answers
2. 1,525 views
which phase change is endothermic ?(1)gas-->solid (2)gas-->liquid (3)liquid-->solid (4)liquid-->gas
1. 4 answers
2. 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
1. 3 answers
2. 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
1. 5 answers
2. 2,796 views
How do you get : x=1/3y+2 in the y=mxtb form ?
1. 1 answer
2. 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
1. 3 answers
2. 1,399 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
1. 3 answers
2. 986 views
Copper reacts with sulfuric acid according to the following equation: 2H3SO4 + Cu-> CuSO4 + 2H2O + SO2 How many grams of sulfur
1. 4 answers
2. 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
1. 3 answers
2. 1,882 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.
1. 2 answers
2. 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
1. 4 answers
2. 1,105 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
1. 3 answers
2. 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
1. 4 answers
2. 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
1. 3 answers
2. 859 views
A municipal landfill has available space of 16.2 ha at an average depth of 10m. Seven hundred sixty-five (765) m3 of solid waste
1. 4 answers
2. 3,518 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
1. 4 answers
2. 1,942 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
1. 2 answers
2. 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. 1 answer
2. 1,001 views
Another “grand challenge” for engineering is managing the nitrogen cycle. Use the nature of the chemical bond in diatomic
1. 4 answers
2. 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?
1. 4 answers
2. 1,209 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?
1. 5 answers
2. 3,287 views
Estimate the chronic daily intake of 1,1,1-trichloroethane from exposure tocity water supply that contains a
1. 1 answer
2. 873 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
1. 2 answers
2. 592 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
1. 5 answers
2. 4,132 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
1. 4 answers
2. 1,387 views
(10 Points) A contractor is trying to estimate the distance to be expected of a drawdownof 4.81 m from a pumping well under the
1. 3 answers
2. 960 views
(10 Points) A water initially contains 50 mg/L of Mg2+ The pH of the water is increased . until the concentration of hydroxide
1. 1 answer
2. 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
1. 6 answers
2. 429 views
The pH of a 0.10 M solution of ammonia is 11.1. Find the hydroxide concentration.
1. 3 answers
2. 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)
1. 4 answers
2. 2,498 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. 1 answer
2. 674 views
Azomethane, CH3NNCH3, is not a stable compound, and once generated, it decomposes. The rate of decomposition was measured by
1. 1 answer
2. 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. 1 answer
2. 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
1. 2 answers
2. 578 views
what is the primary result of a fisson reaction ?1 conversion of mass to energy 2 conversion of energy to mass 3 binding
1. 2 answers
2. 546 views
compared to an ordinary chemical reaction, a fission reaction will1 release smaller amounts of energy 2 release larger amounts
1. 7 answers
2. 6,188 views
which process occurs in a controlled fusion reaction?1 light nuclei collide to produce heavier nuclei. 2 heavy nuclei collide to
1. 1 answer
2. 496 views
which process occurs in a controlled fusion reaction?1 light nuclei collide to produce heavier nuclei. 2 heavy nuclei collide to
1. 3 answers
2. 4,918 views
a radioisotope is called a tracer when it is used to1 kill bacteria 2 kill cancerous cells determine the age of animal skeletal
1. 3 answers
2. 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
1. 2 answers
2. 964 views
radiated food can be safely stored for a longer time because radiation1. prevents air oxidation 2. prevents air reduction 3.
1. 3 answers
2. 1,367 views
K-42 has a half-life of 12.4 hours. If you begin with 250g ofK-42, determine how much you will have left after 4 half-lives. How
1. 2 answers
2. 832 views
Turn "theta = 2" into rectangular form.
1. 1 answer
2. 312 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. 1 answer
2. 387 views
determine the value of N:N/20 * 100%=60% can someone explain
1. 1 answer
2. 404 views
What place value is ten times smaller than ten millions place?A) hundred trillion B) one trillion C) hundred billion D) ten
1. 3 answers
2. 429 views
Israel has 72 apples.12of them are red .What percentage of the apples are red
1. 2 answers
2. 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
1. 3 answers
2. 534 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.
1. 4 answers
2. 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
1. 3 answers
2. 812 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.
1. 3 answers
2. 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. 1 answer
2. 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
1. 4 answers
2. 681 views
Treasure Mountain International School in Park City, Utah, is a public middle school interested in raising money for next year's
1. 3 answers
2. 1,792 views
How does estimating help you add two digit numbers
1. 1 answer
2. 397 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
1. 3 answers
2. 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. 1 answer
2. 483 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
1. 6 answers
2. 1,647 views
Javier rides his bicycle at a rate of 15 miles per hour. Javier's speed is equivalent to _____ ft per speed.
1. 7 answers
2. 2,504 views
Which of the following transformations preserves the measures of the angles but changes the lengths of the sides of the figure?
1. 3 answers
2. 871 views
Healthy people 2020 includes a set of of objectives aimed at reducing risky health behaviors. A major focus is on _____ -taking
1. 5 answers
2. 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
1. 2 answers
2. 713 views

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