Chemistry

Oxygen gas O2 was placed into a closed container at 273.15K. What is the change in temperature that is required in order to increase the pressure from 2.50atm to 7.50atm and decrease the volume from 3.50L to 1.50L?
1 Answer
4) A solution has a pH of 2.0. What is true about this solution? *The [H+] is greater than the [OH-].The poH is 7.It is a basic solution.It has a [OH-] of 0.01.
1 Answer
Review the following chemical equation: Find the molar ratio between C6H6 tocarbon dioxide, CO2. 2C6H6 + 1502 YEILDS 6H20 - 12C02
1 Answer
Plz help ASAP it is number 13 yall have to answer
1 Answer
ASAP Would you expect the odor of an open bottle of perfume to spread through the air faster when the room temperature is 85F or 55F
1 Answer
Which of the following does NOT take place in the mouth?a)An enzyme is added to your food to help break it down.b)The teeth mechanically break down food into smaller pieces.c)Nutrients are absorbed into the blood stream.d)Both mechanical & chemical digestion begin.
2 Answers
SCENARIO:A species of rabbits lives on both sides of a small stream. They can move across the stream by jumping or wading but they cannot swim. A flood caused the stream to widen into a permanent river. The rabbits become 2 groups, one on each side of the river. Being unable to swim, they could not cross the river. After many years, the climate changed so that on the northern side of the river the temperatures were consistently lower than on the southern side of the river.1. What will happen to the members on each side of the river with unfavorable traits for their climate?2. What event isolated the rabbits?3. If the river and climate conditions remain the same as described above, what will happen to the original species of rabbit?4. Why?5. What type of isolation is represented in this scenario? 6. Could a new species form? Why? {i need to answer all the questions help}
1 Answer
4NH3(g) + 3O2(g) --> 2N2(g) + 6H2O(l)H = 1530.4 kJIf the temperature of this system is increased, then the equilibrium will shift to the _______ and the amount of N2 gas will _________.a. left, increaseb. left, decreasec. right, decreased. right, increase
1 Answer
The enthalpies of formation of the compounds in the combustion of methane, , are CH4 (g): Hf = 74.6 kJ/mol; CO2 (g): Hf = 393.5 kJ/mol; and H2 O(g): Hf = 241.82 kJ/mol. How much heat is released by the combustion of 2 mol of methane? Use .
2 Answers
A flask containing 500 liters of hydrogen gas was collected under a pressure of 980mmHg. What will be the volume if the pressure is changed to 900mmHg?
1 Answer
A compound is 2.00% H by mass, 32.7% S by mass, and 853% O by mass. What is its empiricalformula?The final step is to use the mole ratios of the elements to write the empirical formulaThe mole ratios of the elements are:mole ratio of H:S:0 = 2:14The mole ratios show the ratios of the elements in the compound. Use these ratios to identify thesubscripts on each element in the empirical formula Remember that the subscript 1 is not shownWhat is the correct empirical formula for this compound?HSOHSO4H2SO4
2 Answers
Which type of plant used light, feathered seeds?What would a zebra be?consumerdecomposerproducer
2 Answers
How much heat will be absorbed by 122 g of water when its temperature is raised by 17oC? The specific heat for water is 4.18 J/g oC. Use significant figures.
2 Answers
A student collects data during an experiment Mass of empty beaker- 77.25 Mass of 100L water-100.0 gMass of salt- 20.0 gTotal mass-197.25 gAfter the salt and water are mixed in the beaker and stirred for 1 minute what will be the mass of the contents
1 Answer
A sample of helium gas at room temperature is compressed from 100 cm3 to 20 cm3. Its new pressure is now 30 cm Hg. What was the original pressure of the gas?
1 Answer
Which characteristic of a substance is considered a chemical property
1 Answer
Which is not a reason that water is used to store spent fuel rods from nuclear power plants? Water increases the speed of the chain reaction in the fuel rods. Water protects nuclear power plant workers from the high temperature and radiation of the fuel rods. Water acts as a radiation shield to reduce the radiation levels. Water cools the spent rods.
1 Answer
Which of the following is an example of a Lewis base?O A. H+B. BF3O C. NH3O D. H20+
1 Answer
PLEASE help! BRAINLIEST to correct answer!
2 Answers
Explain what the Kb for aniline (C6H5NH2) tells you (Kb = 4.3 x 10-10).
1 Answer
Relate dark matter to the development of the universe after the Big Bang. In 3-5 sentences, speculate on how the development of the universe would have been different if there had been no dark matter. In your answer, use the term structures.Please answer this and ill mark you as brainliest
1 Answer
Ummmm!! Can somebody please help me answer this question
2 Answers
I AM GIVING BRAINLIEST PLEASEEEEEE HELPPPPPPPPPP I NEEDDDDDDDD HELPPP PLEASEHow many grams of solute are needed to make 2.66L of a 1.99M C 12 H 22 O 11 solution?
1 Answer
Which statement is true about the total mass of the reactants during a chemical change?
2 Answers