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July 25, 2014

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Recent Homework Questions About Substance Abuse

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science
calculate the density of a liquid if 150g of a substance with 188mL volume
Thursday, August 11, 2011 at 12:07am

chemistry
1.If its molar solubility is designated by “x”, then which of the following expressions best represents the solubility product for the substance Ag2SO4? a) x2 b) 27x4 c) 4x3 d) 108x5 e) 3x4 2. Consider the equilibrium, 4HCl(g) + O2(g) 2H2O(g) + 2Cl2(g). The ...
Wednesday, August 3, 2011 at 5:45pm

chemistry
1. A solution of sodium oxalate has a pH of 7.82. The [OH-] in mol/L must be which of the following: a) 6.18 b) 1.5 x 10-8 c) 6.6 x 10-7 d) 7.82 e) -7.82 2. When 0.93 mol of O2 and 0.56 mol of NH3 are mixed together and allowed to come to equilibrium according to the equation...
Wednesday, August 3, 2011 at 5:41pm

Medical Terminology
Need help identifying 15 medical terms that would be unfamiliar to non-medical persons. Also providing singular and plural forms of selected medical terms. This is a 47-year-old male who was in his usual state of health until early this evening when he developed an acute ...
Tuesday, August 2, 2011 at 3:22pm

phiisical science
Suppose an unknown substance has a melting temperature of 1,200 degrees Celsius and a density of 16.7 g/cm3.
Tuesday, July 26, 2011 at 6:40pm

A/P Chem
A student wants to make a 5.00% solution of potassium chloride using .0377 g of the substance.What mass of water will be needed to make the solution?
Sunday, July 24, 2011 at 8:17pm

Pre Cal
a radio actice substance decays so that half of the substance decays every 2 minutes. if 100 g of the substance are present initially, how many grams will be present after 4 minutes and 8 minutes respectively?
Sunday, July 24, 2011 at 7:48pm

Chem
I have a chemistry test that I need help with. My answers have stars by them Can someone please help me with the answers to this test??? Part 1 – Matter as Energy & Structure 1. When a pair of electrons is shared between two atoms, a covalent bond is said to have formed...
Wednesday, July 20, 2011 at 1:52pm

physics
A piece of metal has a density of 0.20g/cm^3.what is the volume in cm^3 of a 1g sample of a substance?
Sunday, July 17, 2011 at 2:30am

English
Could someone review this essay for me? It is a rough draft of my persuasive essay. The Reality of Credit Cards and College Students Laurie A Johnson COM 156 Diana Bernste The Reality of Credit Cards and College Students Why do companies target a portion of the population that...
Saturday, July 16, 2011 at 1:41pm

child psychology
Is this a good example of cognitive perspectiive and do you have anything that you can add on to this to give more substance. The cognitive learning process involves thought processes and the behaviors that these thoughts cause. The best example that I can think of is the ...
Saturday, July 16, 2011 at 10:15am

chemistry
what is the substance in a solution that gets dissolved
Wednesday, July 13, 2011 at 7:29pm

chemistry
I have a unit cube question to which the answer is given that I'm trying to figure out. The question is: If under conditions of high pressure & temperature, the crystalline structure rearranges to form a face-centered cubic unit cell, what is the new density of the ...
Sunday, July 10, 2011 at 6:36pm

Chemistry
A certain substance has a heat of vaporation 56.21 kj/mol. At what kelvin temperature will the vapor pressure be 6.50 times higher than it was at 361k? I need help in setting the problem: I got 56.21/8.3145j/mol.k(1/T1-1/T2)?
Saturday, July 9, 2011 at 6:21pm

Chemistry
A certain substance has a heat of vaporation 56.21 kj/mol. At what kelvin temperature will the vapor pressure be 6.50 times higher than it was at 361k? Thank you
Saturday, July 9, 2011 at 3:35pm

Chemistry
A certain substance has a heat of vaporation 56.21 kj/mol. At what kelvin temperature will the vapor pressure be 6.50 times higher than it was at 361k? Thank you
Saturday, July 9, 2011 at 3:35pm

Chemistry
A certain substance has a heat of vaporation 56.21 kj/mol. At what kelvin temperature will the vapor pressure be 6.50 times higher than it was at 361k? Thank you
Saturday, July 9, 2011 at 3:35pm

physical science
For each pair of substances, which of the substance with more thermal energy and explain why. a.500 g of water at 35„aC vs. 500 g of water at 85„aC b.500 g of water at 35„aC vs. 250 g of water at 35„aC I dont know how to determine the answer
Tuesday, July 5, 2011 at 10:30pm

hsm210
Scenario 3: Caring for the HomelessYou are a case manager in a community mental health center. Many of your clients are homeless and have either mental disorders or substance abuse and health problems. Health problems among the homeless are exacerbated by their homeless status...
Tuesday, July 5, 2011 at 9:10pm

chemistry
Which of the following pairs of molecules have the same oxidation number for carbon? CO and CO2 CH4 and CCl4 C6H12O6 and C(s) H2CO and COCl2 Carbon always has an oxidation number of +4 What mass of CuSO4.5H2O would you need to prepare 250.0 mL of a 0.250 M solution? [MW of ...
Sunday, July 3, 2011 at 6:37pm

Science
Part 1 Which of the following is a redox reaction? a. H2CO3 (aq) + 2NH3 (aq) → 2NH4+ (aq) + CO32- (aq) b. 2VO3- (aq) + Zn (s) + 8H+ (aq) → 2VO2+ (aq) + Zn2+ (aq) + 4H2O (l) d. Zn(NO) (aq) + 2NaOH (aq) → Zn(OH) (s) + 2NaNO (aq) part 2 For the redox reaction in...
Thursday, June 30, 2011 at 11:20pm

Homework Help ME! Science
In the reaction mechanism below, indicate what substance is acting like a catalyst. Step 1: H2O2 (aq) + I- (aq) → H2O (l) + IO- (aq) Step 2: H2O2 (aq) + IO- (aq) → H2O (l) + I- (aq) Is the catalyst in the problem above a heterogeneous or a homogeneous catalyst?
Thursday, June 30, 2011 at 11:13pm

English
During the afternoon, my cats are content to nap on the couch.What is the meaning of these sentence? Content is the meaning of "the amount of a substance that something contains".Is it right?But I don't understand meaning of word "content" in these ...
Saturday, June 25, 2011 at 8:31am

science
name the water soluble substance witch added with delute hcl and produce gas tarn lime water milky?
Saturday, June 25, 2011 at 5:24am

s.d
name the substance witch is insoluble in water is added to dilute hydrochloric acid a colourless gas is evolved?
Saturday, June 25, 2011 at 3:04am

Health Psychology
I want to make it clear that I do not want any answers to the project I am about to post on here. I only need help understanding it a little. I am trying to get online to speak with my professor but our school site is down at the moment. I think I know what I am doing, I just...
Friday, June 24, 2011 at 9:35pm

chemistry
What is the approximate boiling point of the substance represented by the complete heating curve below? (2 points) A) 30°C B) 40°C C) 50°C D) 100°C
Wednesday, June 22, 2011 at 2:00pm

Life orientation
Ways in which you critically discuss how substance abuse disease impact on the teenager
Sunday, June 19, 2011 at 8:06am

History.. Revisions made
Is morality is a Social Function (Construction)? This would imply that there is no such thing as REAL morality only the morality that society forces us to follow (both consciously and unconsciously). Use examples to explain your case. [ WARNING: If you do agree with this ...
Sunday, June 19, 2011 at 1:36am

Chemistry
Part A Calculate the standard enthalpy change for the reaction 2A+B --->2C +2D Use the following data: Substance Delta H(kJ/mol) A -263 B -391 C +203 D -523 Express your answer in kilojoules. MY ANSWER FOR PART A: Delta H =277 kJ PART B----THIS ONE I NEED HELP ON Express ...
Thursday, June 16, 2011 at 1:00pm

Chemistry
Part A Calculate the standard enthalpy change for the reaction 2A+B --->2C +2D Use the following data: Substance Delta H(kJ/mol) A -263 B -391 C +203 D -523 Express your answer in kilojoules. MY ANSWER FOR PART A: Delta H =277 kJ PART B----THIS ONE I NEED HELP ON Express ...
Thursday, June 16, 2011 at 12:59pm

chemistry
Substance A and substance B react to form substance C as described by the equation: A + B ↔ C If only substance A and substance B are placed in an enclosed vessel and allowed to react what would the reaction be?
Monday, June 13, 2011 at 3:18pm

Chemistry
In the following reaction, which substance is acting as the Brønsted-Lowry acid? NH3 + H2O NH4+ + OH
Monday, June 13, 2011 at 10:50am

chemistry
calculate the molar concentration of substance in a solution containing 5,85g of Nacl2 in 200cm cube solution
Sunday, June 12, 2011 at 7:47am

science
what entropy changes occur whin a substance melts?
Thursday, June 9, 2011 at 7:35pm

med term
In theses 2 scenarios im suppose to find 15 med words and define them, now I have found more then 15 am I correct that there is more then 15? Dont want to know what they are just want to know that there is more then 15 I. AMBULATORY CARE FACE SHEET Admit Date: 7/8/20XX @ 20:22...
Thursday, June 9, 2011 at 4:53pm

physics
A 500.0 g metal block absorbs 1.125 × 104 J of heat to raise its temperature by 50.0 K. What is the substance? Specific Heats of Selected Substances ______________________________________ Substance C [J/(kg•K)] Water (ice-)2,060 Iron-450 Aluminum-897 Gold- 130 ...
Wednesday, June 8, 2011 at 9:56am

TEACHER AIDES
16. Which of the following sets of factors is most influential in contributing to violence? A. Child abuse and poor nutrition B. Persistent poverty and poor nutrition C. Media violence and poor-quality schools D. Persistent poverty and widespread substance abuse . I think its D.
Monday, June 6, 2011 at 8:51pm

Health
What are the short term effects of Cocaine: When someone consumes this substance what effect will it have on their body, mind, and behavior? Please answer ASAP I really need the answer... and please don't give the website for me to find the info, I don't have enough ...
Saturday, June 4, 2011 at 9:47pm

life orientation
substance abuse in (10-15)lines critically discuss 5 ways in which the human or environmental problem impact on the community?
Thursday, June 2, 2011 at 2:37pm

Life Orientation
Institutions/community organizations that are involved in supporting or giving redress to substance abuse.
Monday, May 30, 2011 at 3:00pm

substance
How alcoholism is a human factor that may cause ill health ,accidents,crises or disasters
Monday, May 30, 2011 at 9:31am

chem.
What is an ionic substance made from?
Sunday, May 22, 2011 at 9:06pm

substance drug addiction
A clear explanation of drug addiction how human factor that may cause ill health, accidents, crises or disaster.
Saturday, May 21, 2011 at 4:13pm

chemistry
in 1807 the English chemist Humphrey Davy passed an electric current through molten potassium hydroxide and isolated a bright, shiny reactive substance. He claimed the discovery of a new element, which he names potassium. In those days, before the advent of modern instruments...
Saturday, May 21, 2011 at 3:40pm

chemistry
which substance , glucosa or sodium chloride, will produce more freezing point depreccion whent added to equal amounts of water
Tuesday, May 17, 2011 at 1:15pm

chem
Two hundred grams of a substance requires 0.52 kJ of heat to raise its temperature from 25°C to 45°C. q = mCT. Mass (m) is in grams. Temperature is in degrees Celsius.
Tuesday, May 17, 2011 at 7:08am

chem
draw a titration curve for strong acid that indicates the starting substance had a pH of 1.5 And the base being used to titrate it had a pH of 13.
Monday, May 16, 2011 at 8:48pm

science
whats the physical form in which a substance exists?
Monday, May 16, 2011 at 8:44pm

Drug addiction substance
Human factors that cause ill health.accidents,crises/disaster and an appropriate way to deal with these
Monday, May 16, 2011 at 8:31am

Chem
which substance cannot be decomposed by a chemical change? carbon dioxide, methane, carbon monoxide, or carbon
Wednesday, May 11, 2011 at 3:49pm

Chemistry
Identify the acid or base behavior of each substance in this reaction: H2PO4 + H2O <----> H3O+ + HPO4-
Wednesday, May 11, 2011 at 12:59am

life orientation
substance abuse that cause ill health ,accident,crises and disaster in south africa 5 ways in which the human problem impacts on the environment
Sunday, May 8, 2011 at 2:17pm

maths
The mass of a particular substance is known to grow exponentially at a rate of 0.5% per hour. Its initial mass was 25 grams and, after t hours, it weighed 31 grams. The equation modelling this growth is 25×1.005 t  =​196; 31. Use the ...
Sunday, May 8, 2011 at 10:34am

Chemistry
If 609.5 grams of vanadium (II) oxide, VO, and 832 grams of iron(III) oxide, Fe2O3, are put into a container and allowed to react according to the equation above, which substance(s) and how many grams of each would be present in the container after the reaction is complete?
Thursday, May 5, 2011 at 10:41am

chemistry
The compound X2C is a very hard substance commonly used to coat metal cutting tools to make them sharper and more resilient. Carbon repersents 3.2% of the compound. what is the element represented by X.
Wednesday, May 4, 2011 at 6:41pm

Chemistry
A student places 5.77 grams of wex (a mythical substance often burned for light on other planets) in a test tube and then melts it. When the wex starts to freeze, the test tube (with the wex) is put into 237.6 g of water at 34.7oC. If the final temperature of the water is 51....
Tuesday, May 3, 2011 at 7:33pm

life orientation
in 15 lines critically discuss 5 ways in which the substance abuse impacts on the community. Provide relevant sources to support your claims.
Tuesday, May 3, 2011 at 4:00pm

Science (Asap)
Compare and contrast: When you combine two or more different substances,you get a mixture.The substance aren't mixed evenly.Their properties don't change.The substance can be separated from the mixture.For example,sand is a mixture that can be separated into rocks and ...
Monday, May 2, 2011 at 7:43pm

English 102
Can someone give me feedback on this please. Introduction Is same-sex marriage going to create issues in our society? Same-sex marriages will most likely produce issues in many political agendas. Religious leadership of Abrahamic faith everywhere will also be confrontational ...
Friday, April 29, 2011 at 7:13pm

Statistics
Among companies doing highway or bridge construction, 80% test employees for substance abuse. A study involves the random selection of 10 such companies. Find the probability that exactly 5 of the 10 companies test for substance abuse.
Wednesday, April 27, 2011 at 12:35pm

allied health part2-19
of the following types of information, which one has the strictest rules regarding the release of informationg? a. substance abuse information b. mental illness information c. genetic information d. adoption information
Wednesday, April 13, 2011 at 7:15pm

allied health part 2-17
if an institutional review board is involved in a request for information, the information is likely sought by a a. health care facility b. researcher c. court d. substance abuse center
Wednesday, April 13, 2011 at 7:14pm

physics
Lead is a very dense substance. 12 cm^3 of lead has a mass of 136.8g. Wgat is the density of the lead?
Monday, April 11, 2011 at 10:12am

Calculus
In a chemical reaction, substance A combines with substance B to form subtance Y. At the start of the reaction, the quantity of A present is a grams, and the quantity of B present is b grams. Assume a is less than b. At time t seconds after the start of the reaction, the ...
Sunday, April 10, 2011 at 7:00pm

Calculus
In a chemical reaction, substance A combines with substance B to form subtance Y. At the start of the reaction, the quantity of A present is a grams, and the quantity of B present is b grams. Assume a is less than b. At time t seconds after the start of the reaction, the ...
Sunday, April 10, 2011 at 6:01pm

Calculus
In a chemical reaction, substance A combines with substance B to form subtance Y. At the start of the reaction, the quantity of A present is a grams, and the quantity of B present is b grams. Assume a is less than b. At time t seconds after the start of the reaction, the ...
Sunday, April 10, 2011 at 3:51pm

chemistry
iron+sulphur together are a mixture of small grains yellow and dark grey.Its chemical symbol is 'Fe + S'.When it reacts with oxygen they create a new chemical substance; Iron Sulphide. What do you put for 'explain the reaction using the Big Idea of Energy? :S HELP xxx
Sunday, April 10, 2011 at 3:20pm

Calculus
In a chemical reaction, substance A combines with substance B to form subtance Y. At the start of the reaction, the quantity of A present is a grams, and the quantity of B present is b grams. Assume a is less than b. At time t seconds after the start of the reaction, the ...
Sunday, April 10, 2011 at 12:23am

Physics
Calculate the net charge on a substance con- sisting of a combination of 3.5 × 1013 protons and 6.3 × 1013 electrons. Answer in units of C.
Friday, April 8, 2011 at 7:38pm

math
The decay of 333 mg of a radioactive substance is given by A(t) = 333e-0.024t, where t is time in years. Find the amount left after 17 years.
Friday, April 8, 2011 at 7:17pm

Math
the concentration of a certain substance in our organism is given by the model Q9t) = Q(subscript 0) e^-0.1960t a) what quantity of substance is present in the organism of this individual 3 hours after ingestion? b) after how many hours will there only be 10% of this substance...
Thursday, April 7, 2011 at 12:51am

English
Select the answer that contains the correct punctuation for the following sentence. A diamond is the hardest natural substance it can scratch any other stone. A. The sentence is correct. B. ... substance, it can... C. ... substance; it can... D. ... substance; and, it can... I...
Wednesday, April 6, 2011 at 5:51pm

physics
calculate the net charge on a substance consisting of a combination of 2.6e13 protons and 6.0e13 electrons. answer in units of C.
Wednesday, April 6, 2011 at 4:55pm

science
if we mix 2 substance A and B of 30 degrees celsius and 70 degrees celsius respectively.what will be the temp of the mixture
Wednesday, April 6, 2011 at 12:50pm

chemistry
What substance is produced at the cathode during the electrolysis of molten calcium bromide, CaBr2? Assume standard conditions.
Tuesday, April 5, 2011 at 7:02pm

Chemistry(HELP)
Can you check this answer? 1. Heat of combustion is the heat released by the complete combustion of one mole of a substance. a.) True b.) False Answer: b.) False Is this right?
Tuesday, April 5, 2011 at 11:42am

Chemistry: Answer check please!
1. Reactions follow the law of conservation of mass. a.) True b.) False Answer: True 2. Reactants are the materials used in a chemical reaction. a.) True b.) False Answer: True 3. In a chemical equation, the mass on the left of the arrow equals the mass on the right. a.) True ...
Saturday, April 2, 2011 at 7:32pm

chemistry
what is the specific heat capacity of substance X when 34.80 g of X is heated from a starting temperature of 20.5 C to 40.9 C by 2.54 kJ of energy
Thursday, March 31, 2011 at 6:46pm

Biology
Which substance does not leave the nephrons by active transport? a)Potassium ions b)Water c)Calcium ions d)Phosphate ions e)glucose I think its either water or glucose... Another question.. Two strategies- negative feedback and antagonistic hormones- have evolved to maintain a...
Thursday, March 31, 2011 at 6:32pm

Chemistry
Iron(III) oxide can be reduced by carbon monoxide. Fe2O3(s) + 3CO(g) 2Fe(s) + 3CO2(g) Use the following thermodynamic data at 298 K to determine the equilibrium constant at this temperature. Substance: Fe2O3(s) CO(g) Fe(s) CO2(g) ΔH° f (kJ/mol): -824.2 -110.5 0 -393.5...
Thursday, March 31, 2011 at 5:56pm

Chemistry
On the basis of the solubility curve for KNO3 what type of substance would you expect KNO3 to be?
Wednesday, March 30, 2011 at 2:27pm

chemistry
A 79.9-L sample of a gaseous hydrocarbon, measured at 1.00 atm pressure and 25.0°C, is burned in excess oxygen, liberating 4.24 × 10^3 kJ of heat at constant pressure. What is the identity of the hydrocarbon? (R = 0.0821 L · atm/(K · mol)) Substance H&...
Wednesday, March 30, 2011 at 12:09am

Chemistry
Suppose that 0.650 mol of methane, CH4(g), is reacted with 0.800 mol of fluorine, F2(g), forming CF4(g) and HF(g) as sole products. Assuming that the reaction occurs at constant pressure, how much heat is released? Substance & Enthalpy of Form. (kJ/mol) C(g) 718.4 CF4(g) -679....
Monday, March 28, 2011 at 10:02pm

chemistry
Substance x has a molar mass of 107.6 g/mol. when 2.50 g of substance x burns in an iron calorimeter the temp. of calorimeter and water (2.000Kg)increases from 25.8 d Celsius to 38.7 d celsius. What is the molar heat of combustion of substance x in kJ/mol. the heat capacity of...
Sunday, March 27, 2011 at 3:14pm

chemistry
there are __ reprensentative particles in a mole of any substance
Sunday, March 27, 2011 at 12:42pm

chemistry
substance X has a molar mass of 107.6 g/mol. When 2.50 g of substance x burns in an iron calorimeter, the temp. of the calorimeter and the water (2.000 Kg) increases from 25.8 deg. C to 38.7 deg. C. What is the molar heat of combustion of substance X in KJ/Mole. Heat capacity ...
Sunday, March 27, 2011 at 10:42am

Chemistry
H2C2O4 * 2H2O (s) is a primary standard substance. 2.3688 grams of oxalic acid dihydrate were completely neutralized by 42.56 milliliters of NaOH solution. Calculate the molar concentration of the NaOH solution.
Saturday, March 26, 2011 at 11:39pm

CHEMISTRY
The equilibrium constant for the reaction, SO2(g)+ NO2(g) <----> NO(g)+ SO3(g) has been experimentally determined as a function of temperature. The results are presented in the table below. T (°F) KC 285 662 752 156 842 93.4 932 59.6 1022 40.2 If 0.0791 ft3 SO2, 0....
Thursday, March 24, 2011 at 11:39pm

Chemistry
If the cyclohexane is initially contaminated with a soluble non-reactive, non-volatile substance, will the change in freezing point, delta Tf, be a. Higher b. Lower c. The same as the uncontaminated cyclohexane? There will be no change hence delta Tf will be the same as the ...
Tuesday, March 22, 2011 at 2:30am

Chemistry
A: A student must make a five-fold dilution of a 2.15 M HCl solution. If the student wishes to make 75.0 mL of the diluted solution, what volume of the 2.15 M solution will he need to dilute? B: What is the concentration of the diluted substance?
Monday, March 21, 2011 at 2:16pm

chemistry
in stoichiometry, after you have balanced the formula, how do you know which substance is the one you use to convert all 4 times to get the wanted reults
Wednesday, March 16, 2011 at 4:07pm

Chemistry
the specific heat of a substance is the energy (Joules) required to raise one gram of substance by one degree celsius (units J/g°C). Heating 225.0° cm3 of a solid from 36.1° to 74.3°C takes 35850 J of energy. The density of the solid at 36.1°C is 1.75 g/cm3...
Tuesday, March 15, 2011 at 11:27pm

chemistry
In a chemical reaction, substance A combines with substance B to form substance Y. At the start of the reaction, the quantity of A present is a grams, and the quantity of B present is b grams. Assume a> and <img src=. At time t seconds after the start of the reaction, ...
Monday, March 14, 2011 at 2:50am

science
how many half-lives have passed if 87.5% of a substance has decomposed? how many if 99.999% has decomposed?
Monday, March 14, 2011 at 12:42am

physics
Find the density of a substance whose mass is 28 grams and whose volume is 4 cubic centimeters
Thursday, March 10, 2011 at 7:13pm

chemistry
what is the molarity of 40g in 0.5L of solution. Molecular weight of substance is 100.09g/mole.
Thursday, March 10, 2011 at 10:36am

chemistry
if you have 1000g of a substance at -20 degrees celsius with a specific heat of .110 c/1 degree celsius and you add 12 kilojoules to it what is the resulting temperature?
Tuesday, March 8, 2011 at 9:41am

Physics
Calculate the net charge on a substance con- sisting of a combination of 1.9 × 10^13 protons and 3.9 × 10^13 electrons. Answer in units of C.
Monday, March 7, 2011 at 9:37pm

Physics
Calculate the net charge on a substance con- sisting of a combination of 1.9 × 10^13 protons and 3.9 × 10^13 electrons. Answer in units of C.
Monday, March 7, 2011 at 9:36pm

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