1) which is a physical change a) steam is condensed to water b) water is decomposed...
1) which is a physical change
a) steam is condensed to water
b) water is decomposed by electric current
(I'm very sure iron rust in air or a piece of paper is burned are not physical change)
2) which statements about the solubility of oxygen gas
in water is true?
a) it increases as temperatures increases
b) it increases as pressure increases
c) it is unaffected by temperature or pressure
d) it decreases with both Increasing temperature and pressure
THANK YOU ALL.
Homework Answers
Request Answer!
We need at least 10 more requests to produce the answer.
0 / 10 have requested this problem solution
The more requests, the faster the answer.
Add Answer to:
1) which is a physical change
a) steam is condensed to water
b) water is decomposed...
QUESTION 19 Which of the following, if any, is a physical property of matter? Water decomposes...
QUESTION 19 Which of the following, if any, is a physical property of matter? Water decomposes to form hydrogen and oxygen. Gasoline burns in a car's engine to form carbon dioxide and water. Iron rusts after being exposed to air and moisture. The density of water is about 1.00 g/mL at room temperature. None of the above is a physical change.
1.which one reperesents a chemical change? -heating water to form steam -sliced aplles, in contact with...
1.which one reperesents a chemical change? -heating water to form steam -sliced aplles, in contact with air, turning brown -sugar dissolving in hot coffee -mixing sugar and cinnamon -cutting a bar of sodium metal into pieces with knife 2 a subsatnce which can be decomposed in two or more simpler subtances by chemical action is called a(n) -element -metal -compound -mixture -solution
Question #12 10) The technique of recrystallization involves dissolving a crude solute in a minimum amount...
Question #12
10) The technique of recrystallization involves dissolving a crude solute in a minimum amount of solvent to create a followed by of the solute into a more pure form. A) saturated solution; condensation B) unsaturated solution; evaporation C) supersaturated solution, recrystallization D) concentrated solution; deposition E) dilute solution; reformation 11) 11) Which of the following statements is TRUE? A) In general, the solubility of a gas in water decreases with increasing temperature. B) In general, the solubility of...
1. Which of the following compounds should be soluble in CC14? a) Naci b ) H20...
1. Which of the following compounds should be soluble in CC14? a) Naci b ) H20 c) NaOH d) C3H18 e) None of these 2. with increasing CO2 pressure and_ with The solubility of carbon dioxide gas in water increasing temperature. a) increases, increases b) increases, decreases c) decreases, increases d) decreases, decreases e) remains constant, decreases 3. Pressure . Based on the Raoult's Law plot for a mixture of liquids A and B shown on the right, which of...
1. Energy stored in the phase change of water is called latent heat. a) True b)...
1. Energy stored in the phase change of water is called latent heat. a) True b) False 2. Higher pressure gradient forces (PGF) result in weaker winds. a) True b) False 3. What adiabatic lapse rate do you use when cooling a saturated air parcel? a) Dry adiabatic lapse rate b) Wet adiabatic lapse rate 4. If the amount of water in the atmosphere is held constant, increasing the air temperature will cause the humidity to a) Increase. b) Decrease.
massa volum volum mo olu 5. In which of the following solvents would you expect KBr...
massa volum volum mo olu 5. In which of the following solvents would you expect KBr to be most soluble? a) CH4 (hexane) d) CCM (carbon tetrachloride) b) CH CH OH (ethanol) e) C.Hz (cyclohexane) c) CH. (benzene) ___6. A 9.50 % by mass solution of acetone (C,H,O) in water has a density of 0.9849 g/mL at 20°C. What is the molarity of this solution? a) 0.621 M b) 1.61 Me) 1.66 Md ) 1.71 M e ) 16.9 M...
T/F (1) Additives added to ethanol will have the same effect on boiling point as the...
T/F
(1) Additives added to ethanol will have the same effect on boiling point as the same amount of additives added to water Ethanol changes its solution boiling point with additive mass fraction of 0.15 more than water changes its boiling point with a mass fraction of 0.25 If the activity coefficient of solute A in a solution is equal to 1, A has little to no preference to other molecules around it in solution It is likely that flavors...
1.) Saltwater is slightly denser than fresh water. If you swim below the surface in saltwater,...
1.) Saltwater is slightly denser than fresh water. If you swim below the surface in saltwater, will the pressure be greater than in freshwater at the same depth?/1 2.) Suppose that you balance a5 kg ball on the tip of your finger, which has an area of 0.0001 m. Find the pressure on your finger in Pa Don't forget to first find the force of gravity on the ball/3 3) Why isn't there a horizontal buoyant force on an object...
Ethalpy Change of a Chemical Reaction, Sample calculations for Run 2 B, all questions, please hel...
Ethalpy Change of a Chemical Reaction, Sample calculations for
Run 2 B, all questions, please help me, thank you very much
A chemical reaction involves breaking, making, or changing chemical bonds. These alterations in bonding lead to a change in enthalpy, AHo, between the products and reactants. This enthalpy change takes into account the change in intermal energy in the system and the work done by the system on its surroundings during the reaction. If the reaction occurs at a...
1. [6.4% ) Write down the electron configuration for Br. 2. [6.4 %) Draw resonance structures...
1. [6.4% ) Write down the electron configuration for Br. 2. [6.4 %) Draw resonance structures for (a) NO:, (b) NNO (a) N-NEO (b) NN-o 3. [6.4%) In which pair do both compounds exhibit predominantly covalent bonding? A. BaCl and H-O B. NaBr and SO C. K O and NBr D. CCl and Asl 4. [6.4 % ) Rank the following hydrocarbons in order of increasing vapor pressure: CHe, CvoH, CH, CH16, C22H 5. [6.4%) O and N2 in air...
QUESTION 19 Which of the following, if any, is a physical property of matter? Water decomposes to form hydrogen and oxygen. Gasoline burns in a car's engine to form carbon dioxide and water. Iron rusts after being exposed to air and moisture. The density of water is about 1.00 g/mL at room temperature. None of the above is a physical change.
Question #12
10) The technique of recrystallization involves dissolving a crude solute in a minimum amount of solvent to create a followed by of the solute into a more pure form. A) saturated solution; condensation B) unsaturated solution; evaporation C) supersaturated solution, recrystallization D) concentrated solution; deposition E) dilute solution; reformation 11) 11) Which of the following statements is TRUE? A) In general, the solubility of a gas in water decreases with increasing temperature. B) In general, the solubility of...
1. Which of the following compounds should be soluble in CC14? a) Naci b ) H20 c) NaOH d) C3H18 e) None of these 2. with increasing CO2 pressure and_ with The solubility of carbon dioxide gas in water increasing temperature. a) increases, increases b) increases, decreases c) decreases, increases d) decreases, decreases e) remains constant, decreases 3. Pressure . Based on the Raoult's Law plot for a mixture of liquids A and B shown on the right, which of...
massa volum volum mo olu 5. In which of the following solvents would you expect KBr to be most soluble? a) CH4 (hexane) d) CCM (carbon tetrachloride) b) CH CH OH (ethanol) e) C.Hz (cyclohexane) c) CH. (benzene) ___6. A 9.50 % by mass solution of acetone (C,H,O) in water has a density of 0.9849 g/mL at 20°C. What is the molarity of this solution? a) 0.621 M b) 1.61 Me) 1.66 Md ) 1.71 M e ) 16.9 M...
T/F
(1) Additives added to ethanol will have the same effect on boiling point as the same amount of additives added to water Ethanol changes its solution boiling point with additive mass fraction of 0.15 more than water changes its boiling point with a mass fraction of 0.25 If the activity coefficient of solute A in a solution is equal to 1, A has little to no preference to other molecules around it in solution It is likely that flavors...
1.) Saltwater is slightly denser than fresh water. If you swim below the surface in saltwater, will the pressure be greater than in freshwater at the same depth?/1 2.) Suppose that you balance a5 kg ball on the tip of your finger, which has an area of 0.0001 m. Find the pressure on your finger in Pa Don't forget to first find the force of gravity on the ball/3 3) Why isn't there a horizontal buoyant force on an object...
Ethalpy Change of a Chemical Reaction, Sample calculations for
Run 2 B, all questions, please help me, thank you very much
A chemical reaction involves breaking, making, or changing chemical bonds. These alterations in bonding lead to a change in enthalpy, AHo, between the products and reactants. This enthalpy change takes into account the change in intermal energy in the system and the work done by the system on its surroundings during the reaction. If the reaction occurs at a...
1. [6.4% ) Write down the electron configuration for Br. 2. [6.4 %) Draw resonance structures for (a) NO:, (b) NNO (a) N-NEO (b) NN-o 3. [6.4%) In which pair do both compounds exhibit predominantly covalent bonding? A. BaCl and H-O B. NaBr and SO C. K O and NBr D. CCl and Asl 4. [6.4 % ) Rank the following hydrocarbons in order of increasing vapor pressure: CHe, CvoH, CH, CH16, C22H 5. [6.4%) O and N2 in air...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago