a certain reaction has the following generaln form

72,094 results, page 67

math

the straight L has gradient 3 and passes through the point A(-6,4). a) find an equation for L in the form y=mx+c b) straight line R has the equation in the form of -7y+x+14=0. Given that R crosses the y-axis at the point B and intersects L at the point C, find the coordinates ...

Makalema secondary school

Aluminium reacts with oxygen to form aluminium oxide.How many grams of potassium chlorate would be heated to produce enough oxygen to form 5.1 grams of aluminium oxide?

math

3/4 of the girls in a 3rd form class play netball and 4/7 play volleyball . Every girl plays atleast one of these games. If 27 play both games,how many girls are there in the 3rd form

History Check Please!

I am having troubles with these 4 questions on my homework. Can someone help? 1. It is the responsibility of all citizens to A. run for political office. B. attend naturlization ceremonies. C. pay taxes and serve on juries.** D. join special interest groups. 2. Which is not a ...

chemistry

QUESTION 10 Ammonia gas is formed from nitrogen gas and hydrogen gas according to the following equation: N2 (g) + 3H2 (g) Imported Asset 2NH3 (g). If 112 grams of nitrogen gas is allowed to react with an excess of hydrogen gas to produce 120 grams of ammonia, what is the ...

physics again

Why don't sparklers burn you? i don't understand if they're hot then how do they have little heat? and were learning about electric forces so it must have something with that Sparklers produce light by means of an electroluminescent reaction. A chemical reaction excites an ...

Biology(Anatomy&Physiology)

1)Which organelle makes most ATP 2)The chemical reaction that joins two amino acids is called 3)In a single molecule of water which type of bond holds the H to the O? 4)Which type of chemical bond results from the transfer of an electron from one atom to another 5)A chemical ...

Chemistry

copper is a product of the reaction that occurs when dry ammonia is passed over a sample f heated copper(2) oxide.The equation for the reaction is given: 2NH3+3CuO=3Cu+3H2O+N2 Calculate the mass of copper produced if 0.12dm^3 of nitrogen is produced at room temperature and ...

Science Chemistry

LIST: Sodium carbonate. Calcium carbonate. Zinc sulfate. Zinc nitrate. (a) State a pair of chemicals from the list above that can be used to prepare zinc carbonate by a precipitation reaction involving mixing 2 aqueous solutions together. (b) Write a chemical equation reaction...

chemistry

Given this data in a study on how the rate of a reaction was affected by the concentration of the reactants Initial Rate, RUN #(A, M) (B, M) (C, M) (mol L-1 s-1 1 0.200 0.100 0.600 5.00 2 0.200 0.400 0.400 80.0 3 0.600 0.100 0.200 15.0 4 0.200 0.100 0.200 5.00 5 0.200 0.200 0....

AP CHEMISTRY

Phosphoric acid is triprotic acid (three ionizable hydrogens). The values of its stepwise ionization constants are Ka1= 7.5E-5, Ka2= 6.2E-8, and Ka3= 4.2E-13 1) Write the chemical equation for the first ionization reaction of phosphoric acid with water 2)Write the equilibrium ...

chemistry

When 0.752 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 12.2C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant figures. Do not ...

physics

Because a concave lens cannot form a real image of a real object, it is difficult to measure its focal length precisely. One method uses a second, convex, lens to produce a virtual object for the concave lens. Under the proper conditions, the concave lens will form a real ...

Finance

Evans Technology has the following capital structure. Debt ............................................ 40% Common equity .......................... 60 The aftertax cost of debt is 6 percent, and the cost of common equity (in the form of retained earnings) is 13 percent. a)...

Pre-Calculus Questions

Hi! Can someone help me with these? Thanks! 1.) Determine the slope and the y-intercept of the equation of the line passing through the points (-5, 3) and (1, -3). Write the equation of the line in slope intercept form. 2.) Determine the x- and y- intercepts and use them to ...

MATH HELP

1. Which ratios form a proportion? Use equivalent ratios to test each pair. A. 4/9, 2/3 B. 6/15, 9/12 C. 12/16, 15/20 D. 18/ 20, 24/30 2. Which ratio forms a proportion with 20/30? Use equivalent ratios to test each ratio. A. 16/24 B. 10/20 C. 17/51 D. 16/60 3. Which ratios ...

Chemistry- rate laws

CH3CHO decomposes into methane gas and carbon monoxide gas. This is a 2nd order reaction. Rate of decomposition at 140 degrees Celsius is .10M/s when the concentration of CH3CHO is .010. What is the rate of the reaction when the concentration of CH3CHO is .50M? Have not been ...

Art

an environment artist created a piece in protest of trash. Anticipation negative public reaction, the artist decided to display the work anyway. what is the most likely reason? A. The artist believed that the purpose of the work was to stir up awareness B. The artist did not ...

Art

An environment artist created a piece in protest of trash. Anticipation negative public reaction, the artist decided to display the work anyway. what is the most likely reason? 1. The artist believed that the purpose of the work was to stir up awareness 2. The artist did not ...

Chemistry

The combustion of liquid ethanol (C2H5OH) produces carbon dioxide and water. After 4.60mL of ethanol (density=0.789g/ml) was allowed to burn in the presence of 15.45g of oxygen gas, 3.70mL of water (density=1.00g/ml) was collected. a)Determine the theoretical yield of H2O for ...

chemistry

sodium burns in chlorine to produce sodium chloride according to the reaction: 2Na(s) + Cl2(g) = 2NaCl(s). A student is asked to predict the mass of sodium chloride produced when 71 g of sodium is placed in a container of 200 g of chorine. The container is heated until the ...

CHEMISTRY

You carefully weigh out 20.00 g of CaCO3 powder and add it to 81.00 g of HCl solution. You notice bubbles as a reaction takes place. You then weigh the resulting solution and find that it has a mass of 92.80 g . The relevant equation is CaCO3(s)+2HCl(aq)→H2O(l)+CO2(g)+CaCl2(...

chemistry

Given one of the starting materials and end product for each of the following reactions, show all reactants, reaction conditions in brackets (where known) and products. sorry i know this question has been posted already, but i need help. could you explain to me how to do them...

chemistry

The indicator methyl red has a pKhln=4.95 . It changes from red to yellow over the pH range from 4.4 to 6.2. If the indicator is placed in a buffer solution of Ph = 4.56, what percent of the indicator will be present in the acid form,Hln- , AND what percent will be present in ...

Geometry

Please help 1. If segment LN is congruent to segment NP and ∠1 ≅ ∠2, prove that ∠NLO ≅ ∠NPM: Overlapping triangles LNO and PNM. The triangles intersect at point Q on segment LO of triangle LNO and segment MP of triangle PNM. Hector wrote the following proof for his...

Chemistry

1) How does the atomic radius change from left to right across a period in the periodic table? A) It tends to decrease*** B)It tends to increase C) It first increases, then decreases D) It first decreases, then increases 2) What is the charge of a cation? A) A positive charge...

Chemistry

1) How does the atomic radius change from left to right across a period in the periodic table? A) It tends to decrease*** B)It tends to increase C) It first increases, then decreases D) It first decreases, then increases 2) What is the charge of a cation? A) A positive charge...

Chemistry

For the following reaction, 5.20 grams of propane (C3H8) are allowed to react with with 23.1 grams of oxygen gas. propane (C3H8) (g) + oxygen (g) carbon dioxide (g) + water (g) What is the maximum amount of carbon dioxide that can be formed? grams What is the FORMULA for the ...

algebra

How do I convert the following polar expression to rectangular form? 3 sec (beta) r= ---------------- 4 sec (beta) + 4 [If not clear, the equation is r equals 3 times secant of angle beta divided by 4 times the sec of angle beta plus 4.]

statistics

AB ia a uniform rod of length 120 cm and weight 18kg.wt it rotates about a hinge at its end A. its end B is pulled by a light string whose other end is tied to point C over A. the rod is in equilibrium when it inclines to the horizontal at 30degree if the reaction of the hinge...

English essay yr9.

Um can any body help me with this. LOl :( It's uhh.. to do with an essay comparing and contrasting the use of language, form, structure and the content of texts. I have to identify australian cultural elements in the following 2 poems; "The Shearer's Wife" by Louis Esson and "...

Chemistry

Table sugar consists primarily of sucrose, C12H22O11(s). The standard enthalpy of combustion for sucrose is the ΔHo for the reaction: C12H22O11(s) + 12 O2(g) → 12 CO2(g) + 11 H2O(l) Calculate this ΔHo. Give your answer in units of kJ to five significant figures. Use the ...

Chem II

The equilibrium constant, Kp for the reaction PCl5 <---> PCl3 + Cl2 is 1.05 at 250 degrees C. The reaction is started with PCl5, PCL3 and Cl2 at 0.177, 0.223, and 0.111 atm at 250 degrees C. When the reaction comes to equilibrium, the pressure of _________ PCl3 must have...

Chem

Change in enthalpy problem. Consider the reaction represented below. Referring to the data in the table below, calculate the standard enthalpy change for the reaction at 25 degrees C. O3(g)+NO(g)-->O2(g)+NO2(g) Standard enthalpy of formation in kJ/mol: O3(g) 143 NO(g) 90 ...

Chemistry

What is the difference between a chemical change and a chemical reaction?? My answer: A chemical change leads to a solidifed chemical reaction but more or less they are the same thing because it's a change in which one or more pure substances are converted into diffeent pure ...

Social Studies

name if the following involve, seperation in powers, checks and balances, judicial review, federalism, or some combination of these principles, and say why A) the state law requires that a prayer be said each day in public schools. The courts rule that law wiolates a first ...

Chemistry

Consider the following reaction. 2 HCl(aq) + Ba(OH)2(aq) BaCl2(aq) + 2 H2O(l) ΔH = -118 kJ Calculate the heat when 103.6 mL of 0.500 M HCl is mixed with 300.0 mL of 0.550 M Ba(OH)2. Assuming that the temperature of both solutions was initially 25.0°C and that the final ...

Chemistry

Consider the following reaction. 2 HCl(aq) + Ba(OH)2(aq) BaCl2(aq) + 2 H2O(l) ΔH = -118 kJ Calculate the heat when 114.8 mL of 0.500 M HCl is mixed with 300.0 mL of 0.400 M Ba(OH)2. Assuming that the temperature of both solutions was initially 25.0°C and that the final ...

Biology

sorry a few more questions why can DNA form fibres that allow it to seprate from RNA while RNA cant form such fibres? also, when treated with DNAse, I know DNA viscosity reduces because its cut up into smaller pieces. but on a graph of viscosity vs time, I have this ...

Chemistry

Based on pressure values for each component of the reaction, what is the value of the reaction quotient, Q? Equation: C2H2 + 2 H2 -> C2H6 C2H2 has a pressure of 5.05 atm H2 has a pressure of 4.35 atm C2H6 has a pressure of 0.0225 atm

Chemistry

Based on pressure values for each component of the reaction, what is the value of the reaction quotient, Q? Equation: C2H2 + 2 H2 -> C2H6 C2H2 has a pressure of 5.05 atm H2 has a pressure of 4.35 atm C2H6 has a pressure of 0.0225 atm

Chemistry

Using data from the following reactions and applying Hess's law, calculate the heat change for the slow reaction of zinc with water (answer must be in kJ/mol Zn): Zn(s) + 2 H2O(l) ----> Zn^2+(aq) + 2 OH-(aq) + H2(g) (ΔHrxn = ?) H+(aq) + OH-(aq) ----> H2O(l) (Δ...

chemistry

Using data from the following reactions and applying Hess's law, calculate the heat change for the slow reaction of zinc with water (answer must be in kJ/mol Zn): Zn(s) + 2 H2O(l) ----> Zn^2+(aq) + 2 OH-(aq) + H2(g) (ΔHrxn = ?) H+(aq) + OH-(aq) ----> H2O(l) (Δ...

Biochem

Glycerol 3-phosphate dehydrogenase catalyzes the reversible reaction: G3P + NAD+ --> NADH + H+ + DHAP If in the cell, the concentrations of G3P, NAD+, NADH, and DHAP are 2 mM, 4 mM, 6 mM, and 8 mM respectively. Determine if the reaction spontaneous as written? DHAP + 2e...

chem (science)

Which of the following pairs of elements are likely to form ionic compounds: A) helium and oxygen B) magnesium and chlorine C) chlorine and bromine D) potassium and sulfur E) sodium and potassium F) nitrogen and oxygen I believe the answer is d and f Would appreciate a ...

chem help

The reaction of methane and oxygen yields carbon dioxide gas and water. The unbalanced reaction is as follows: CH4(g) + O2(g)CO2(g) + H2O(g) A. If 1.26 grams of methane are reacted, how many grams of water vapor are produced? B. If 2.796 grams CO2 are released, how many grams ...

Science

4)Explain why,when a soccer ball is kicked, the action and reaction forces don't cancel each other. a)The force of the player's foot on the ball greater than the force on the ball on the player's foot. b)They act on two different objects. c)The reaction force happens after the...

chemistry

Hydrogen peroxide can be produced in the lab by reacting barium peroxide with hydrochloric acid. another product of the reaction is barium chloride. 1). what is the balanced chemical equation for the reaction? 2). what mass of hydrogen peroxide should result when 1.50g of ...

chemistry

The reaction for the complete combustion of acetylene is shown below. C2H2(g) + 5/2 O2(g) -----------> 2 CO2(g) + H2O(l) ΔH = -1299 kJ Use this reaction and the data below to calculate the heat of formation for acetylene. ΔHf[H2O(l)] = -285.8 kJ/mol Î...

chemistry

The reaction for the complete combustion of acetylene is shown below. C2H2(g) + 5/2 O2(g) -----------> 2 CO2(g) + H2O(l) ΔH = -1299 kJ Use this reaction and the data below to calculate the heat of formation for acetylene. ΔHf[H2O(l)] = -285.8 kJ/mol Î...

chem

A piece of lithium metal with a mass of 3.25g reacts with sufficient hydrochloric acid in a closed flask containing 235 mL of air originally at 0.991 atm and 18 C. The heat released in this reaction raises the temperature to 41.0 C inside the flask. a)What is the pressure in ...

chemistry

Given these standard reduction potentials at 25oC: Cr3+ + e- -> Cr2+ (E1^o = -0.407V) Cr2+ + 2e- -> Cr(s) (E2^o = -0.913V) Determine the standard reduction potential at 25oC for the half-reaction equation: Cr3+ + 3e- -> Cr(s) This seems like a really simple problem (...

Chemistry

Potassium permanganate, KMnO4, a common oxidizing agent, is made from various ores that contain manganese (IV) oxide, MnO2. The equation shows the net reaction for one process that forms potassium permanganate 2MnO2+2KOH+O2=2KMnO4+H2 What is the maximum mass, in kilograms, of ...

chemistry

the diagram below shows a structural formulae of 3 cabon compounds labelled 1 2 and 3 and the eaction between compounds 1 and 2. The equation for this reaction is incomplete only the reactants are shown, the missing products being indicatedby a? :o ch2 =ch-ch -oh + ch3 - ch - ...

Chemistry - Chemical Kinetics

1) if the concentrations of trace constituients of the atmosphere are expressed in molecules/cm3 , what would be the units of reaction rate???? i think the ans is molecules/cm3 per seconds since the usual units of reaction rate is mol per dm3 per seconds.....am i correct?

Chemistry

For the reaction: V2O5 + 6HCl --> 2VOCl3 + 3H2O If 13.65g of VOCl3 was produced in this reaction, how many grams of V2O5 were reacted in excess HCl? I used stoichiometry and converted 13.65g of VOCl3 into grams of V2O5. I got 73.28 g. However, I feel like this isn't right ...

Chemistry

Nitrogen dioxide decomposes at 300°C via a second-order process to produce nitrogen 14) monoxide and oxygen according to the following chemical equation. 2 NO2(g) → 2 NO(g) + O2(g). A sample of NO2(g) is initially placed in a 2.50-L reaction vessel at 300°C. If the ...

Chemistry

Nitrogen dioxide decomposes at 300°C via a second-order process to produce nitrogen 14) monoxide and oxygen according to the following chemical equation. 2 NO2(g) → 2 NO(g) + O2(g). A sample of NO2(g) is initially placed in a 2.50-L reaction vessel at 300°C. If the ...

Biotechnology

Consider the titration of 25.0 mL of 0.050 0 M Sn2+ with 0.100 M Fe3+ in 1 M HCl to give Fe2+ and Sn4+, using Pt and calomel electrodes. (a) Write a balanced titration reaction. (b) Write two half-reactions for the indicator electrode. (c) Write two Nernst equations for the ...

Math

Would 72,060,964,765 look like the following in it's expanded form? 7X 10,000,000,000 + 2X 1,000,000,000 + 0X 100,000,000 + 6X 10,000,000 + 0X 1,000,000 + 9X 100,000 + 6X 10,000 + 4X 1,000 + 7X 100 + 6X 10 + 5X 1 been working on this for 1 hour!

Statistics

A VP of manufacturing claims that more than 3% of items produced using a certain assembly line are is defective. A random sample of 100 items from the assembly line had 4 defectives. At the 5% level of significance, which of the following would be part of the standardized ...

math

The following table of values represents a line. x | y -10 | 19 0 | -1 10 | -21 50 | -101 Identify the equation of the line. Write the equation in slope-intercept form. My answer: −2x+(−1) The answer came out incorrect, and the correct answer was −2x+−1...

Math

The following table of values represents a line. x | y -10 | 19 0 | -1 10 | -21 50 | -101 Identify the equation of the line. Write the equation in slope-intercept form. My answer: −2x+(−1) The answer came out incorrect, and the correct answer was −2x+−1...

Math help Ms. Sue please

1. What is the simplified form of the expression? 7m^2 + 6.5n - 4n + 2.5m^2 - n 9.5m^2 + 1.5n 4.5m^2 + 1.5n 1.5m^2 - 4.2n 9.5m^2 - 1.5n 2. What is the sum? 9/4 + (-1/5) 41/20 -41/20 -1/3 8/20 3. Order the following numbers from least to greatest. √7, -2.3, √3, 5.1...

math, algebra,correction & help

directions are: write each fraction in simplest form: (-15x^3y^3)/(-20x^1y^4) My answeris: (3x^2)/(4y) THESE TWO NEXT ONES ARE THE ONES THAT I DON'T UNDERSTAND: pROBLEM #1 DIRECTIONS: Write each expression in simplest form. (4x-28)/(5x-35) Problem #2 directions: Write each ...

physic

The drawing shows a device that you can make with a piece of cardboard, which can be used to measure a person's reaction time. Hold the card at the top and suddenly drop it. Ask a friend to try to catch the card between his or her thumb and index finger. Initially, your friend...

Art

I urgently need you to check these sentences. Thank you. 1) Focus on Richardson’s Pamela and answer briefly the following questions. 2) What does Pamela recount to her mum in letter XV? 3) What does Mr B accuse her of and how does she apologize herself to him? 4) What does ...

chemistry

I have to calculate the ΔV= final volume-initial volume For the first trial the final volume was .005mL the initial volume was .03mL, which equaled to -.025mL. The volume was negative because it was exothermic reaction. For the second trial the final volume was 0.015 and ...

chemistry

I have to calculate the ΔV= final volume-initial volume For the first trial the final volume was .005mL the initial volume was .03mL, which equaled to -.025mL. The volume was negative because it was exothermic reaction. For the second trial the final volume was 0.015 and ...

Chemistry

2. When a 1.000 g sample of the rocket fuel hydrazine, N2H4, is burned in a bomb calorimeter which contains 1200g of water, the temperature rises from 24.62C to 28.16C. If the C for the bomb is 840 J/C Calculate: q reaction for combustion of a one-gram sample and q reaction ...

vectors in three space

a) Describe the form of the coordinates of all points that are equidistant from the x- and y-axes. b) Describe the form of the coordinated of ll points that are equidistant from the x-, y- and z-axes.

Please double check...GK or Dr.Bobb22

Hi, i actually posted this up before..please double check the answers if i got them right have to hand in on Wednesday: The Chemicals are: Baking Soda- NaHC03 Calcium Chloride- CaCl2 Bromothymol Blue - (acid base indicator) _______________________________________ What is: (a) ...

Chemistry

The enthalpy of combustion of butane C4H10 is described by the reaction: C4H10(g) + (13/2) O2(g) -> 4CO2(g) + 5H2O(g) ΔH°rxn = –2613 kJ/mol Given the following enthalpies of formation: ΔH°f[CO2(g)] = -393.5 kJ/mol ΔH°f[H2O(g)] = -241.8 kJ/mol Calculate the value of ...

Math

Cubes with edge length of 1/3 foot will be fit perfectly to form the right rectangular prism shown on the picture. Length 1 2/3, Width 1/1, and Height 2 1/3 1 cube = 1/3 ft 1) How many small cubes are needed to form the prism? 2) What is the volume of one of the small cubes? ...

Chemistry

For the reaction CH3COOH- CH3COO + H+, which of the following statements is true? CH3COO- is an Arrhenius base. CH3COO- is a conjugate CH3COOH- is a Brønsted-Lowry acid. <my choice CH3COOH- is a Brønsted-Lowry base.

science

What do you think causes certain landforms to be in same place and not others?

social studies

Why are grapes able to grow in certain areas of the NORTHEAST????????

english

how can i formally start and essay about a certain interest? Any suggestions?

college

Are there certain curricular areas in which technology is more useful than in others?

Auto

If the engine is vibrating within a certain rpm range, what is the likely cause?

HELP 13

Practices by a certain group of people A. Customs B. Beliefs C. Traditions D. Norms C

science

Does the human tongue have definite areas for certain tastes

math

A certain pencil comes 4 in a package for $.75. Find the cost of 24 pencils.

Math

The circumference of a certain circle is doubled. By what factor is its area increased?

Chemistry

A 0.10M solution of a certain monoprotic weak acid has a pH of 2.44. Calculate Ka.

Math

Describe and correct the error in writing the number 81,700,000 in scientific notation. Standard form 81,700,000 product form 81.7*100,000 scientific notation 81.7*10

Algebra 2

Can someone check my answers. Write the following equations in standard form. 1) x^2 - 2x + y^2 + 4y = 11 answer: (x-1)^2 + (y+2)^2 = 16 2) 4x^2 + 24x - y + 34 = 0 answer: y = 4(x-3)^2 + 2 3) The graph of which equation is a circle? A. 5x^2 + 10x = 9 + 5y^2 B. 5x^2 - 10x = 0...

physics

A particle is traveling counterclockwise in a circle of radius r = 2.85 m. At some instant in time, the particle is located by the angular coordinate α = 34.0°, the total acceleration has a magnitude of a = 19.0 m/s2 and is directed at an angle β = 20.0° with ...

Chemistry

Nitrogen dioxide, a pollutant in the atmosphere, can combine with water to from nitric acid. One of the possible reactions is shown below. Calculate ∆G0 and Kp for this reaction at 25oC and comment of on the spontaneity of the reaction (MUST plot the data and find ...

Chemsitry

Nitrogen dioxide, a pollutant in the atmosphere, can combine with water to from nitric acid. One of the possible reactions is shown below. Calculate ∆G0 and Kp for this reaction at 25oC and comment of on the spontaneity of the reaction (MUST plot the data and find ...

College Chemistry.

During volcanic eruptions, hydrogen sulfide gas is released and is oxidized by the oxygen in the air yielding sulfur dioxide gas and water vapour. Calculate the standard enthalpy change for this reaction given the following: 3S(rhombic) + 2H2O(g) → 2H2S(g) + SO2(g) Δ...

physics

The "reaction time" of the average automobile driver is about 0.700 s. (The reaction time is the interval between the perception of a signal to stop and the application of the brakes.) If an automobile can slow down with an acceleration of 12.0 ft/s^{2}, compute the total ...

Chemistry

Can someone explain in easier terms the spontaneous process, entropy, and free energy. The textbook is hard to understand. Just a simple explanation. Thanks. Appreciate it! Free energy is the amount of energy that can be released in a chemical reaction. If free energy is ...

physics

A meter stick is held vertically above your hand, with the lower end between your thumb and first finger. On seeing the meter stick released, you grab it with these two fingers. You can calculate your reaction time from the distance the meter stick falls, read directly from ...

HELP PLEASE

I am extremely confused on how to balance a chemical equation. I have an exam tomorrow and I'm lost. In the book it says Chemical Equation: CH4 + O2 > CO2 + H2O Balanced Chemical Equation: CH2 + 2O2 > CO2 + 2H2O How did this happen? Thanks. Oh and what is the main rule ...

Chemisty

For the following reaction, 0.390 moles of nitrogen gas are mixed with 0.139 moles of oxygen gas. nitrogen (g) + oxygen (g) nitrogen monoxide (g) What is the FORMULA for the limiting reagent? What is the maximum amount of nitrogen monoxide that can be formed? moles

hard history question

hi, what was the other european nation besides france and spain that supported the american rev. by declaring war on britain? thanks in advance! http://www.authorama.com/history-of-holland-26.html I am not certain that the Dutch ever declared war on Britain, however, Britain ...

Chemistry

Calculate the value of the equilibrium constant for the following reaction: PbI2 (s) + 2I- (aq) <-> PbI4 ^ 2- (aq) The solubility product constant Ksp for PbI2 is 9.8e-9 and the formation constant Kf for PbI4^2- is 3.0e4 I have Ksp=[PbI4^2-] Kf= [PbI4^2-] / [PbI2][I-]^2 ...

Science

1.Is molar mass always done for one mol of substance? Let me make up an example: 2H2(g)+O2(g)--> 2H2O When finding molar mas of water would it be 2(2(1.01)+2(16)) or just 2(1.01)+16? 2. I'm not really sure about endergonic exergonic reaction because my teacher is teaching ...

algebra

could someone please check these roblems for me and if they are not rightWOULD YOU PLEASE HELP E WITH THE CORRECT ONES THANKS!!! 1. Slove for X, wher X is the real number, square root 5x + 9= square root 9x + 13= 27 2. Find the value: ^3 square root -27= 9 3. Write the ...

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