Sunday
August 28, 2016

Homework Help: Health: Substance Abuse

Recent Homework Questions About Substance Abuse

Science
Which of the following is not a postulate of the kinetic molecular theory? A. The collisions between gas molecules are elastic. B. The energy of a gas molecule is determined by quantum mechanics. C. Gas molecules travel in random, straight paths. D. The absolute temperature of...
Thursday, August 18, 2016 by Science

Chemistry
Calculate how many grams of the substance and how many grams of water is in a solution of 400g with a concentration of a 30%
Monday, August 15, 2016 by David

Chem
Doing which of the following generally increases the entropy of a substance? A. freezing it B. dissolving it in water C. condensing it D. all of the above My answer: D, all of the above.
Monday, August 15, 2016 by Cherry

physics
A substance has a melting point of 800ºC and a boiling point of 1465ºC. The substance is most likely A. water. B. hydrogen. C. gold. D. table salt. D?
Tuesday, August 9, 2016 by quick help needed

physics
The stiffness of an elastic substance is 700N/m calculate the extension of the substance when the load of 25 kg hang on it (g is 9.8m/s squred)
Monday, August 8, 2016 by oluwabunmi

Math
Suppose that the half-life of a substance is 250 yrs. .If there were initially 100 g of substance .How much will remain after 500 years??with solution please
Monday, August 8, 2016 by Queen

Chemistry
What is Anta basic substance?
Sunday, July 31, 2016 by Utsav

Chemistry
How do you determine the polarity of a substance? Example?
Friday, July 29, 2016 by George

life orientation
examine how each of following are responsible for road accident and propose the potential solution by community 1.1 competence of the driver 1.2 substance abuse 1.3 pedestrian 1.4 cyclists 1.5 live stock
Thursday, July 28, 2016 by phumudzo

Chemistry
For two questions below, first write and balance the equation for the chemical reaction.  Please, also review the material in Chapter 8, if you will feel you might need it in order to answer the questions.  Next, please answer the following questions: (a) ...
Wednesday, July 20, 2016 by Chem&Society

phy
The thermal capacity of 10g of a substance is 8 calories. the specific heat is in J/kg-K
Monday, July 18, 2016 by yogeg

chemistry
Solubility (g/100gH2O) Substance 20∘C 50∘C KCl 34.0 42.6 NaNO3 88.0 114.0 C12H22O11 (sugar) 203.9 260.4 Using the above table, determine whether each of the following solutions will be saturated or unsaturated at 50 ∘C. 1.) Adding 19.7 g KCl to 35.0 g H2O 2.)...
Sunday, July 17, 2016 by maria

Chemistry
For the following reaction, identify the substance being oxidized and reduced CH4 + 2 O2 = CO2 + 2 H2O
Wednesday, July 6, 2016 by Dylan

Chemistry
What is the oxidized substance in the following reaction? Fe + 2HCl → FeCl2 + H2
Wednesday, July 6, 2016 by Dylan

Physics
An unknown mass of a certain solid, initially at 60⁰C, is heated at a uniform at a uniform rate. After 4.0 min the solid reaches its melting point of 80⁰C, and it remains at that temperature for 3.0 min until completely melted. After a further 6.0 min of heating, ...
Monday, July 4, 2016 by John Carlo

Chemistry
I had to do a lab and had to calculate the molar mass for a substance with this equation MM=Mrt/pv but we had to calculate the mass of the substance and its temperature experimently. My question is why did we have to boil the liquide in a water containing becker. Why did we ...
Monday, June 27, 2016 by Gabby

CALCULUS
Let y(t) denote the mass of a radioactive substance at time t.t. Suppose this substance obeys the equation y′(t)=−14y(t). Assume that, initially, the mass of the substance is y(0)=M>0. At what time does half of the mass remain? (Round your answer to 3 decimal ...
Monday, June 20, 2016 by Sarah

english
give the substance of the poem daybreak.
Saturday, June 18, 2016 by sarbottam sau

physics
one cubic meter of water hass a mass of 1.0x10^-3. (a) determine the mass of 1.0 m^3. (b) assu!ing biological substance are 98% water, estimate the mass of cell with a 1.0 micrometer dia!eter, a human kidney and a fly. assume a kidney is roughly a sphere with radius of 4.0 cm...
Saturday, June 18, 2016 by Michael

physics
The horizontal door of a substance at a depth of 500m has an area of 0.4m^2 . Calculate the force exerted by the sea water on the door at this depth.
Tuesday, June 14, 2016 by somay

chemistry
Suppose a substance has been prepared that is composed of carbon, hydrogen, and nitrogen. When 0.1156 gram of this compound is reacted with oxygen, 0.1638 gram of carbon dioxide (CO2) and 0.1676 gram of water (H2O) are collected. Assuming that all the carbon in the compound ...
Friday, June 3, 2016 by Chansa

Physical Science
Diamond is a covalently bonded substance made of pure carbon. Each carbon atom has six total electrons so this means carbon shares ________ electron(s) with other carbon atoms. A) one B) two C) four D) six Help Please!
Wednesday, June 1, 2016 by Ben Dover

SCIENCE HELP
CAN SOMEONE CHECK THESE!! 1. Which of the following is a reason why a person might want to wear snowshoes if walking a distance in deep snow? (1 point) snowshoes spread the person’s weight out snowshoes reduce the amount of pressure on a given spot snowshoes keep the ...
Saturday, May 28, 2016 by gabby

physical science
Name the intermolecular forces in each of the above mentioned substance and water
Saturday, May 28, 2016 by lesego mosweu

ordinary differential equation
A contains 200 liters of solution in which is dissolved 40 kg of salt. Tank B contains 400 liters of solution in which are dissolved 80 kg of salt. Pure water flows into tank A at rate of 10 liters per second. There is a drain at the bottom of tank A. Solution leaves tank A ...
Saturday, May 21, 2016 by thigan

chemistry
calculate the masses of each substance formed when 10g of CaCO3 reacts with excess HCl so far I've found the ratio between the substances but from then on, I'm lost
Wednesday, May 18, 2016 by struggle

Chemistry
What does the symbol ∆H stand for? one Calorie given off by a reaction the heat capacity of a substance*** the heat of a reaction for a chemical reaction the specific heat of a substance
Monday, May 16, 2016 by Ben

Math
If a substance has a half life of 600 seconds. If a scientist begins with an initial amount of 1kg complete the following problems: create an exponential equation using proper variables?
Wednesday, May 11, 2016 by Cali

Algebra
A radioactive kind of nitrogen has a half life of 10 minutes. If you start with 64 grams of the substance, how much will be left after 20 minutes?
Friday, May 6, 2016 by Ana Y

Science test review
Here are all the word you can use I need help chemical property mixture heat capasity homogeneous viscosity sublimitation physical property compound chemical formula substance density mass tempurature pressure heterogenerous 14. A property of matter describes its ability to ...
Monday, May 2, 2016 by jj

Exponential Modeling
The half-life of a radioactive substance is one day, meaning that every day half of the substance has decayed. Suppose you have 100 grams of this substance. How many grams of the substance would be left after a week?
Sunday, May 1, 2016 by Anonymous

Physics
What is the maximum mass of a rubber block that can be pulled by a rope whose maximum tension is 3500N? The block is sitting on dry asphalt. (By the way, 1.2 would be used as the coefficient of static friction and 0.8 is the coefficient of kinetic friction for rubber substance...
Wednesday, April 27, 2016 by Kid

Calculus
The rate of decay is proportional to the mass for radioactive material. For a certain radioactive isotope, this rate of decay is given by the differential equation dm/dt = -.022m, where m is the mass of the isotope in mg and t is the time in years. A. If m(0)=20, write a ...
Saturday, April 23, 2016 by Anonymous

life orientation
Examine how each of the following are responsible for road accident and propose practical solutions by community: substance abuse, pedestrian,cyclists and livestock
Thursday, April 21, 2016 by afata

life orientation
Examine how livestock and substance abuse are responsible for road accident and propose practical solutions by community
Thursday, April 21, 2016 by afata

Advanced Chemistry
he vapor pressures of several solutions of water-propanol(Ch3Ch2Ch2OH) were determined at various compositions, with thefollowing data collected at 45C: XH2O Vapor pressure (torr) 0 74.0 .15 77.3 .37 80.2 .54 81.6 .69 80.6 .83 78.2 1.00 71.9 a.) Are solutions of water and ...
Wednesday, April 20, 2016 by Anonymous

science
the solubility of an unknown substance is 120 grams of water at 70 degrees celsius. What is it?
Wednesday, April 20, 2016 by Justin

Chemistry
The molar solubility of a generic substance, Mg(OH)2 ksp = (1.2x10^-11) in 0.10 M NH3 Kb = 1.8 x 10^-5 help me please =)
Monday, April 18, 2016 by Damon

Chemistry
What is the molecular mass of a substance X if 1.00 L of a solution containing 4, 5 g of X has an osmolality of 0.337 mmHg the 30° C?
Thursday, April 14, 2016 by Caline

science
Which of the following is true? Choose all that apply. a. When molecular kinetic energy transferred to a substance, the motion of the molecules in the substance increases. b. When molecular kinetic energy is transferred away from a substance, the temperature of the substance ...
Tuesday, April 12, 2016 by jai

science
Which of the following is true? Choose all that apply. a. When molecular kinetic energy transferred to a substance, the motion of the molecules in the substance increases. b. When molecular kinetic energy is transferred away from a substance, the temperature of the substance ...
Tuesday, April 12, 2016 by jai

science
Here are all the word you can use chemical property mixture heatcapasity homogeneous viscosity sublimitation physicalproperty compound chemicalformula substance density mass tempurature pressure heterogenerous A _________ property of matter describes its ability to change into...
Monday, April 11, 2016 by jacob

math
In a science experiment, the temperature of a substance is changed from 42 degrees Fahrenheit to -54 degrees Fahrenheit at an average rate of -12 degrees per hour. Over how many hours does the change take place?
Wednesday, April 6, 2016 by Anonymous

chemistry
When water freezes and becomes solid ice, the hydrogen bonds create a crystal structure and there is fixed space between each water molecule. This causes ice to? a.become more dense than liquid water because it is a solid* b.become less dense than liquid water and therefore ...
Tuesday, April 5, 2016 by Boberto

specialized patient record
You are the director of health information services in a major medical center that maintains both a psychiatric unit and a substance abuse unit in addition to general medical and surgical units. Your facility plans to join a computer network with fifteen hospitals throughout ...
Monday, March 28, 2016 by Anonymous

Science
13.)How can substance A and B be compared? Choose all that apply. A.)The particles of substance A have more energy than the particles of substance B.*** B.)The particles of substance A are more tightly held together than the particles of substance B. C.)The particles of ...
Wednesday, March 16, 2016 by #FreeGucci

science
1. What would happen to an object if the force of gravity on Earth was decreased by half? (1 point) Its mass would decrease. Its weight would decrease.* Its density would decrease. Its volume would decrease. 2. Which of the following represents a heterogeneous mixture? (1 ...
Wednesday, March 16, 2016 by jai

chemestry
In which of the following physical states does a given substance have the highest entropy? A. solid B. gas C. liquid D. all of the above would this be A?
Tuesday, March 15, 2016 by louren

Chemistry-DrBob222
I know I pored this already, but I for it to mention the assumption. See below. A calorimeter contains 30.0 mL of water at 15.0 C. When 1.50 g of X (a substance with a molar mas of 46.0g/ mol is added, it dissolves via the reaction X (s) + H2O (l) ----> X (aq) and the ...
Friday, March 11, 2016 by Student

Chemistry
A calorimeter contains 30.0 mL of water at 15.0 C. When 1.50 g of X (a substance with a molar mas of 46.0g/ mol is added, it dissolves via the reaction X (s) + H2O (l) ----> X (aq) and the temperature of the solution increases to 26.5 C. Calculate the enthalpy change for ...
Friday, March 11, 2016 by Student

math
The equation for the pH of a substance is pH = –log[H+], where H+ is the concentration of hydrogen ions. A basic solution has a pH of 11.2. An acidic solution has a pH of 2.4. What is the approximate difference in the concentration of hydrogen ions between the two ...
Wednesday, March 9, 2016 by Anonymous

Chemistry
Calculate the molarity of a solution which contains 0.40 mol of a substance dissolved in 1.6 L of a solution.
Tuesday, March 8, 2016 by Jasmine

science
1. The current atomic model would be revised if (1 point) better microscopes were being used to study its structure. better microscopes are invented in the future. new information about an atom’s structure is discovered. a new element is discovered in the future. 2. ...
Thursday, March 3, 2016 by Anonymous

Physics
3/2/2016 An unknown substance at a temperature of 20 degrees Celsius is warmed up to 50 degrees when water at 80 degrees is added to it. The sum of the masses of the unknown substance and water is equal to 1000grams. In another experiment, the same substance at 20 degrees is ...
Wednesday, March 2, 2016 by Marilynn on behalf of Victor Hopman

Chemistry
what is the concentration of each substance if a solution is prepared by mixing 5.00g of NaC2H3O2 with 15.0 ml of 1.45M acetic acid and then bringing the total volume to 250.0 ml?
Monday, February 29, 2016 by Ali

Science
4.)When two or more atoms of the same of the same element are in a chemical bond, the substance is called a(n)________ A.)Compound B.)Molecule C.)Nucleus D.)Particle*** Am I'm correct? BUT My mom disagree's and says C?, isn't she wrong?
Wednesday, February 24, 2016 by #FreeGucci

Chemistry
Pyridine, a substance used as a catalyst in some synthetic reactions is a very weak base its degree of ionization is equal to 0.03% in solution 0.02 mol L -¹. Determine the ionization constant.
Tuesday, February 23, 2016 by Michael

Chemistry1
The questions asks to write a word equation and a balanced chemical equation for a reaction between aqueous copper (ii) sulfate and solid iron. Assume that iron forms the Fe2+ ion.) Include proper states of matter after each substance (s, l, g, aq). Here is what I got ANSWER: ...
Monday, February 22, 2016 by Dina

Health (can someone plz check my answers??)
1. The functions of the respiratory system are... (there are two answers) A. To pump blood to the body B. To deliver oxygen to the body*** C. To remove carbon dioxide from the body*** D. To absorb nutrients 2. The dome-shaped muscle that lies below the lungs and is important ...
Monday, February 22, 2016 by Anonymous

Health
1. The exchange of carbon dioxide and oxygen takes place in the A. alveoli** B. asthma C. bronchi D. diaphragm 2. ________ is a substance in tobacco smoke that reduces the blood ability to carry oxygen A. Tar B. Nicotine C. Asthma D. Carbon monoxide** Check
Friday, February 19, 2016 by Carmen

Health
1. The functions of the respiratory system are (choose 2) A. to pump blood to the body** B. to deliver oxygen to the body** C. to remove carbon dioxide from the body D. to absorb nutrients 2. ______ is a substance in tobacco products that causes stained teeth and skin A. ...
Friday, February 19, 2016 by Hanna

Health and Physical Ed
If you choose to smoke, your body will use this substance less efficiently. 1:microorganisms 2:carbon dioxide 3:plasma 3:oxygen I think it is #3
Friday, February 19, 2016 by Gabby

science
a 54-gram sample of an unknown material has a volume equal to 20cm3 what is the identity of the substance
Thursday, February 18, 2016 by kyle

Math
An unknown radioactive substance has a half-life of 124 years. How long will it take a 67 grams sample to degrade to 18 grams?
Wednesday, February 17, 2016 by Maria

science
construct a heating curve for a substance that is heated to 150 deg centigrade. The substance is originally solid at 35 deg c, melts at 75 deg c and boils at 126 dec c
Wednesday, February 17, 2016 by vidya

Science
The diagram below shows the structural formula and 3D model of the same substance. Which substance is represented by the diagram above? A. H2O ? B. OH C. H2O2 D. OH2 PLZ HELP ASAP @miss sue
Tuesday, February 16, 2016 by Anonymous

chemistry
Limestone rock contains solid calcium carbonate that can react with acid to give products. In one experiment, 1.452 g of limestone rock is pulverised and then treated with 25.00 mL of 1.035 M HCl solution. After the reaction is completed, the resulting mixture is still acidic...
Friday, February 12, 2016 by Anonymous

Sciences
What is a substance that cannot be separated into simpler substances by physical or mechanical methods such as filtering, boiling, or sifting? A crystalline solid A sublimation A pure substance •• An amorphous solid Correct me if I'm wrong
Wednesday, February 10, 2016 by Kiana

health help plz
1. the exchange of carbon dioxide and oxogen takes place in the A. alveoli**** B.asthma C.bronch D.diaphragm 2. _______ is a substance in tabacco products that causes stained teeth and skin. A.nicotine B.carbon monoxide**** C.tar D.menthol 3. _______ is a substance in tabacco ...
Monday, February 8, 2016 by k.c undercover

Health-Please Help!!!
1. The functions of the respiratory system are (select all that apply) A. to pump blood to your body B. to deliver oxygen to the body C. to remove carbon dioxide from the body D. to absorb nutrients 2. The dome-shaped muscle that lies below the lungs and is important in the ...
Monday, February 8, 2016 by Sammy

Math
I need help in algebra 1. I have 4 questions, I already answered 3 of them, but I need help with the other Andrew measures the amount of a very unstable substance to be 100 moles. The half-life of this substance is 3 days (after 3 days, half is gone). 1. Write an exponential ...
Monday, February 8, 2016 by Ayriel

Chemistry
Construct a cooling curve (looks the same as a heating curve) for a substance with a molar mass of 200 that has a gas phase specific heat capacity of 2.9J/g K, a boiling point of 525 K,a liquid phase specific heat capacity of 3.24 J/g K, a freezing point of 352 K, a solid ...
Sunday, February 7, 2016 by Neveah

Chem
For a substance to look red, describe how it interacts with white light?
Friday, February 5, 2016 by Dee

Chemistry
a. Calculate the expected freezing-point depression of a 0.200 m KNO3 solution. b. Will the value you calculated match the actual freezing-point depression for this solution? Why or why not? a). -0.372 degrees Celsius b). Possibly because not all of the substance ionizes 100% ...
Wednesday, February 3, 2016 by Drew

criminal justice
Schlomo occasionally drinks beer with friends. His drinking doesn’t interfere with his job or personal obligations. He gets a pleasant “buzzed” feeling from two beers and doesn’t feel a need to drink more. Alcohol has not caused him any physical or ...
Monday, February 1, 2016 by Julia

Chemistry
Of the following (a through e), which increase and which decrease, as the strength of the attractive noncovalent interactions increases? Explain. a) Deviations from the ideal ga law b) Boiling Temperature c) Sublimation temperature d) Vapor Pressure e) The energy it takes to ...
Sunday, January 31, 2016 by Anonymous

Physica
Had this question answered answered before but I could not understand the explanation. Can someone else please help me? What is the likely identity of a substance (see Table 10-1) if a sample has a mass of 9.38 g when measured in air and an apparent mass of 8.55 g when ...
Sunday, January 31, 2016 by Larisa

Physics
What is the likely identity of a substance (see Table 10-1) if a sample has a mass of 9.38 g when measured in air and an apparent mass of 8.55 g when submerged in water? A)Copper B)Iron or steel C)Aluminum D) Lead E)Concrete F)Gold
Sunday, January 31, 2016 by Larisa

Science
if a strong odour is smelt continuously for some time the sensation of smell of that substance weakness why?
Sunday, January 31, 2016 by Rabin

Science
Plz correct me!! A student combined water, sugar, and salt in a beaker. Which of the following statements is true? (1 point) The individual substances can be separated by physical means. The individual substances cannot be separated by physical means.* A new substance is made ...
Thursday, January 28, 2016 by Vanessa

Science
Check my answers!! Plz 1. What would happen to an object if the force of gravity on Earth was decreased by half? (1 point) Its mass would decrease. Its weight would decrease.* Its density would decrease. Its volume would decrease. 2. Which of the following represents a ...
Thursday, January 28, 2016 by Vanessa

chemistry
Describe the circumstances in which the following processes could be used to separate the components of a mixture. -sublimation -crystallization -evaporation of a solvent from a solution -dissolving of an impure substance in a solvent
Wednesday, January 27, 2016 by cara

Science Plzz correct me!!!
What would happen to an object if the force of gravity on Earth was decreased by half? (1 point) Its mass would decrease. Its weight would decrease.* Its density would decrease. Its volume would decrease. 2. Which of the following represents a heterogeneous mixture? (1 point) ...
Wednesday, January 27, 2016 by Samantha

Science
1. What would happen to an object if the force of gravity on Earth was decreased by half? (1 point) Its mass would decrease. Its weight would decrease.* Its density would decrease. Its volume would decrease. 2. Which of the following represents a heterogeneous mixture? (1 ...
Wednesday, January 27, 2016 by Samantha

chem
How much heat (in kJ) is required to warm 10.0 g of ice, initially at -13.0 ∘C, to steam at 109.0 ∘C? The heat capacity of ice is 2.09 J/g⋅∘C and that of steam is 2.01 J/g⋅∘C. The heat capacity of liquid water is 4.18 J/g⋅∘C. ...
Sunday, January 24, 2016 by Gaby

Chemistry
Nicotine is a basic substance and its dissociation constant is about 1.0 x 10-6. To prepare a solution water with 0.01 mol L-1, calculate the PH
Friday, January 22, 2016 by Alan

Biochemistry
If the same amount of heat is added to equal masses of each of the following substances, which substance will undergo the largest temperature change? Substance Specific heat(j/gC) Al (s) 0.90 Cl2(g) 0.48 C6H6(l) 1.7 H2O (l) 4.2 NaCl(s) 0.87 temp. change = 1/S.H. (specific heat...
Friday, January 22, 2016 by Jessie

Science
Which of the following is pure substance? Chocolates milk Orange juice Seawater Hydrogen peroxide I'm not sure what's the right answer!!
Friday, January 22, 2016 by Jacky

Health connexues academy
when reading a recipe ingredients, which substance make the recipe an unhealthy choice if it is present in a high amount A.fiber B.protein C. trans fat D. unsaturated fat
Monday, January 18, 2016 by dasha

Chemistry
Would a substance that has a granular appearance, is not soluble, melts under a bunsen flame, and does conduct as a solid or liquid have an ionic, covalent or metallic bond?
Friday, January 15, 2016 by Anonymous

Chemistry
Would a substance that is shiny, does not dissolve in water, does not melt under a bunsen flame, and does not conduct as a solid have a covalent, ionic, or metallic bond?
Friday, January 15, 2016 by Anonymous

Physics
If the substance of 1kg mass is converted completely into energy then how many kilowatt energy will be produced?
Thursday, January 14, 2016 by Akhter

Chemistry
Would a substance that is shiny, does not dissolve in water, does not melt under a bunsen flame, and does not conduct as a solid have a covalent, ionic, or metallic bond?
Wednesday, January 13, 2016 by Anonymous

SCIENCEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
1. The current atomic model would be revised if (1 point) better microscopes were being used to study its structure. better microscopes are invented in the future. new information about an atom’s structure is discovered. a new element is discovered in the future. 2. ...
Wednesday, January 13, 2016 by CUPCAKE HELP

HEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEELPP
Melinda’s science teacher gave her an unknown substance to identify based on its properties. After a few tests, Melinda listed her observations in a chart. reflects light very well warms up in my hand flattens out when hit with a hammer conducts electricity Which kind of...
Monday, January 11, 2016 by CANDY HELP

math
the amount of radioactive substance prsent at anytime is given by q(t)=Q0e-0.1 How will it take for the radioactive substance x to decay to 30% of its original amount?
Sunday, January 10, 2016 by robyn

MATH Precalculus
1) A radioactive substance decays exponentially. A scientist begins with 150 milligrams of a radioactive substance. After 26 hours, 75 mg of the substance remains. How many milligrams will remain after 46 hours? 2) A house was valued at $110,000 in the year 1988. The value ...
Saturday, January 9, 2016 by Hai

Chemistry
Substances A and B, initially at different temperatures, come in contact with each other and reach thermal equilibrium. The mass of substance A is twice the mass of substance B. The specifi c heat capacity of substance B is twice the specifi c heat capacity of substance A. ...
Wednesday, January 6, 2016 by Anonymous

chemistry, physics
How would you be able to utilize a calorimeter to determine the specific heat of substance that has a lower density than water?
Wednesday, December 16, 2015 by miyabi

maths
The half-life of lead is 22 years. How long will it take for a sample of this substance to decay to 80% of its original amount
Sunday, December 13, 2015 by Anonymous

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Homework Help: Health