# How to Calculate..

24,021 results

Chemistry
Calculate the pH of a buffer that is 0.130M in NaHCO3 and 0.295M in Na2CO3

Chemistry
Calculate the pH of a solution that is 0.185M in HC2H3O2 and 0.125M in KC2H3O2

Chemistry
Calculate pH of a solution that is 0.255M in CH3NH2 and 0.105M in CH3NH3Br

Maths
If 192;x;y;3 form a geometric progression, calculate the value of x and y.

chemistry
There are 5.00*10^-3 moles of lead II nitrate. Calculate how man grams this is.

Mathematics
Calculate the radius of a circle in which a chord of length 10 cm is 12 cm from the centre

Chemistry
Calculate the volume occupied by 5.25 g of nitrogen at 26*c [temperature] and 74.2 cm of pressure.?

algebra
If 192,x,y,3 form a geometic sequence, calculate the valuest of x and y.

physics
Vector B~ has x, y, and z components of 9.6, 6, and 8.5 units, respectively. Calculate the magnitude of B~ .

physics
Calculate the energy absorbed when 8.5g of ice is melted at 0 celsius

chemsitry
The weak acid HQ has pKa of 4.89. Calculate the [H3O+] of .035 M HQ. Thanks.

Mathematics
The point P,Q and R have co-ordinates. P=(-3,7) Q=(-2,3) and R =(2,2) calculate the length of line PQ

physics
Calculate the Specific Gravity of an object that sinks in water if m = 21.97 g and mA = 17.40 g.

Chemistry
Calculate The volume occupied at s.t.p by 0.24g of ozone ( o=16, G.M.V=22.4dm3

chemistry
Devils food cake has a [H+] of 2.7 x 10-8 mol/L. calculate pH pOH [OH-]

science
Calculate the PH of the 0.4g of NaoH in water to give 200ml of solution

math
If the sides of a triangle are 4p, 5p and 6p, calculate the size of the lagest angle.

maths
using the information that 3.19 x 78.3 = 217.871 calculate 0.319 x 7.83

accounting
how to calculate the remaining lifespan of 3 trucks owned by a business

eee
calculate normality oh hcl ? given specific gravity 1.18 and w/w 36.5

Math
The side of retangular floor are xm and (x + 7)m.the diagonal is (x + 8)m,calculate the value of x

Science
Calculate the frequency of rotation of the second hand clock

Chemistry
If it is known that the iron(ii) salt is FeSO4.7H20 calculate the %Fe from the formula

accounting
how to calculate depreciation using carrying value method?

chemistry
60 gram of urea is dissolved in 250ml. Calculate the molarity

chemistry
calculate the number of moles of Mg in 0.12g(relative mass of Mg=24)

science
Calculate the no of neutrons present in 12x10^25 atoms of oxygen (8O^17)?

chemistry 12u
how do i calculate this.. a solution of nitrous acid has a pH of 2.73 what is the [H3O+] ?

science
Calculate the equilibrium constant of NH4HS H2S + NH3

maths
calculate normality of 0•3molar H3PO3(phosphorus acid)

chrmistry
calculate the molar concentration of 1ppm solution of NaCl?

chemistry
calculate the normality of 5.56 grams of K2Cr2O7 dissolved in 500 mL

PHYSICAL SCIENCES
CALCULATE THE ENERGY OF A PHOTON OF RED LIGHT

Science
Calculate the volume of solute percent in 90ml solution with 5%

Science
Calculate the no. Off molecules atom in 360gm of water...??

chemistry
Calculate the pH of a solution containing 10 g / L of NH4Cl (Kb NH3 = 1.8x10-5

Physics
Calculate the λSWL for molybdenum, when the accelerating potential is 15 kV

Che
Calculate the fundamental particles in HCN and na2co3 and k2so4

science
Calculate the pH of the solution 5ml of M/5,HCl+10ml of M/10 NaO

history
calculate the tariff of your total stay in khaplu hotel.?

CHEMISTRY
CALCULATE THE DECREASE IN TEMPERATURE FOR 22.0 G SILVER THAT LOSES 625 J

Science
Calculate the energy release in 1 gram of Uranium 235

Maths
Calculate The Probability That At Least One Ball Is Blue.

CHEMISTRY
calculate the weight of co2 by complete combustion of 1.5 \g of ethane

maths
calculate the surface area of a sphere of which the volume is 9000mm^3

science
A sample of calcite have 50%cao 40% L.o.i.calculate %of caco3?

chemistry
calculate the normality of 4g of sodium hydroxide in 100ml of solution

math
-8x 20 is a tangent to f(x) x^3 x^2 bx 18 at x=1 calculate the values of a and b I tried the question but I failed

Chemistry
Calculate the number of H Atoms present in 0.125 g CH3OH

Math
The side of a square is 15 cm. Calculate the length of its diagonal. (1dp)

maths
the net of a cube has an edge of 5cm. calculate the perimeter

Maths
Given that 3^9 + 3^12 + 3^15 + 3^n is a perfect cube number. Calculate the value of n.

CHEMISTRY
CALCULATE THE OSMOLARITY OF THE FOLLOWING ).1M KNO3 & ).35M Na3PO4 & 0.35

Chemistry
calculate number of moles of NH3 if 8g of H2 reacts in excess N2

chemistry
Calculate pH of 6ml of 3M HNO3 diluted to 18 litres of water

science
calculate the moles of oxygen atom in 6.2 g of calcium carbonate?

Chem
Calculate the mass of 0.025 moles of sodium bicarbonat

chemistry
calculate the mass at 15.0 L at NH3 at 27 digree Celsius and 900 mm hg?

modern physics
Calculate the commutator [ p, e^ik.x ] where the function e^ik.x may be expanded as: e^ik.x = ∑infinite,n=0 (ik.x^n/n!)

Chemistry 151
Calculate the concentration in g/dm3 of HNO3 in solution A. (H=1; N=14; O=16; Na=23)

chemisrty
Calculate the density of Argon (Ar) gas at 400.0K and 1.23 atm.

mechanical
A cylindrical tank with flat endplates is constructed from two sections that are welded together circumferentially.The outer diameter of the tank is 1.20, and the wall of the tank is 20.0 mm thick and the mamimum internal pressure is 2.00 MPa. (a) Calculate the maximum hoop ...

mathematics
The basic wage earned by a truck driver for a 40 hr work week is \$560.00. A)Calculate his hourly rate. Is the ans \$14 per hour 2) For overtime work, the driver is paid one and a half time the basic hourly rate. B)Calculate his overtime wage for 10 hrs of overtime Is the ans...

math
Calculate the value of the following in exponential form, using standard scientific or "e" notation (for example, 105 = 1.05e2). Enter your answer with the correct number of significant figures. 885.75 g + 10.151 g - 25.50 g Calculate the value of the following in exponential ...

Finance
High Hills plc produce underwater turbines to generate energy and are considering introducing machinery that will reduce the labour hours required to produce a turbine from 5 hours to 2 hours for the remainder of the product life cycle of 3 years. The production volumes are ...

Math - Statistics
I roll 12 4-sided dice. What is the probability that I roll at least one 2? What is the probability that I roll exactly three 2s? So i take it, on any give roll, the probability of rolling a 2 is .25 (25%); the probability of rolling something else must be .75 The probability ...

Science
How much sodium hydroxide, at what concentration, do I need to add to 500 mL of 0.1 N HCL to obtain pH 6.8. How do you calculate this? pH = -log(H^+) M HCl = N HCl mols = M x L. After you know mols HCl you have, then make a solution of NaOH and calculate how much of that must ...

Can someone help me on math?
Calculate the simple interest for each situation. Choose THREE that have a simple interest greater than \$800.00. a. \$2,000.00 at 6% for 7 years *** b. \$4,500.00 at 3% for 6 years *** c. \$1,400.00 at 6% for 9 years d. \$5,000,00 at 7% for 3 years *** e. \$800.00 at 15% for 5 ...

A 1220 N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A W = 1990 N crate hangs from the far end of the beamThe angle between the beam and the horizontal is 30 degrees upwards and the angle between the horizontal and the ...

Chemistry 30
How do i do this question?? A 10.00ml Sample was taken from a 2Liter Container of Tropicana Orange juice. This sample was analyzed for its citric acid content by titration with a known 0.1112M NaOH base solution. A Phenoolphthalein indicator was added to detect the endpoint ...

physics
Proponents of astrology claim that the positions of the planets at the time of a baby's birth will affect the life of that person in important ways. Some assert that this effect is due to gravity. Examine this claim with Newton's law of gravity. Calculate the maximum force ...

calculus
I have the following problem on a takehome assignment and am stuck. A particular stock has value V(t) at time t where V(t)=Ke^(1/2) where K>0. Assume that alternative investments grow in value to e^(rt). Calculate the instantaneous rate of change in the value of the stock. ...

Statistics Algebra 2
A 10-question multiple choice test has 4 possible answers for each question. A student guesses on all ten answer. a)What is the probability that the student selects at least 6 correct answers? b)Is getting exactly 10 questions correct the same probability as getting exactly ...

Healthcare finance
Milwaukee Surgical Supplies, Inc., sells on terms of 3/10, net 30. Grosee sales for the year are \$1,2000,000 and the collections department estimates that 30% of the customers pay on the tenth day and take discounts, 40% pay on the thirtieth days, and remaining 30% pay, on ...

devry
A small startup software developer company needs to create a program that will calculate the pay of its employees. For the third version of the program, the company wants the program to accept an employee’s name, the number of hours the employee worked, and the hourly pay ...

College Chemistry
We will calculate the amount of acid to use in each titration. Assume that you are using 0.0512 M NaOH(aq). A good volume of NaOH(aq) to use per titration is 15mL. From this molarity and volume, the moles of NaOH can be calculated. Since the unknown acid is monoprotic, this ...

Chemistry Dr. Bob222
Ok, UMMMM I thought I was good.. Till now.. Ok, For Cup C Mass of cup,water,stirrer: 55.15 Mass of sodium bicarbonate: 2.02g mass of citric acid: 0.77g total mass: 57.94g mass of cup,solution, stirrer after reaction: 57.64 difference (CO2): 0.30g Part B: Limiting Reactants ...

Physics
One very long wire carries a current of 30A to the left along the x-axis.A second very long wire carries a current of 50A to the right along the line(y=0.280m,z=0) A)Where in the plane of the two wires is the total magnetic field equal to zero? B)A particle with a charge of -2...

accounting
On December 31, 2008, University Theatres issued \$500,000 face value of bonds. The stated rate is 6 percent, and interest is paid semiannually on June 30 and December 31. The bonds mature in 10 years. Required: If required, round your answers to the nearest whole dollar. ...

ap chemistry
A sample of gas in a cylinder of volume 4.2 L at 316 K and 2.68 atm expands to 7.21 L by two different pathways. Path A is an isothermal, reversible expansion. Calculate the work for Path A. Answer in units of J Path B has two steps. In the first step, the gas is cooled at ...

physics (Kinematics)
A motorist drives north for 35.0 s at 25.0 m/s and then stops for 23.0 s. He then continues north traveling 13.0 m in 2.00 s. (a) What is his total displacement? (b) What is his average velocity (magnitude and direction)? I am just clueless on this one. I don't even know where...

Statistics
Consider the following frequency distribution of daily sales for a shop that was kept for the months of November and December in 2013. Daily Sales (\$) 60-70 70-80 80-90 90-100 100-110 110-120 Number of days 5 11 22 13 7 3 a. From this frequency distribution, (i) draw a ...

Jungle, Inc., has a target debt−equity ratio of 0.72. Its WACC is 11 percent, and the tax rate is 31 percent. (Do not include the percent signs (%). Round your answers to 2 decimal places. (e.g., 32.16)) Required: (a) If Jungle's cost of equity is 14 percent, its pretax ...

AP Chemistry
(a) When 300.0 milliliters of a solution of 0.200 molar AgNO3 is mixed with 100.0 milliliters of a 0.0500 molar CaCl2 solution, what is the concentration of silver ion after the reaction has gone to completion? (b)Write the net cell reaction for a cell formed by placing a ...

Chemistry
Calculate the theoretical pH after 2.50 mL and 9.50 mL of NaOH has been added in both the titration of HCl and of HC2H3O2. Indicate if the volume of NaOH is before or after the equivalence point. Compare these theoretical values with the actual values found on the titration ...

Chemistry
Question from text: "The reaction between phosphorus and chlorine is described by the equation, P4(s) + 6 Cl2(g) ↔ 4 PCl3(l). At equilibrium, the concentration of Cl2 is found to be 0.87 M. Calculate Keq." Keq = [PCl3]^4 / [P4] [Cl2]^6 I am not seeing how to solve this ...

Chemistry
0.717 g of a compound containing carbon, hydrogen, and oxygen is burned and found to produce 1.02 g CO2 and 0.624 g H2O. The molar mass of the compound is 124 g/mol. (a) Write a chemical equation for the combustion of this unknown hydrocarbon. (b) Determine the # of g and ...

physics
a) What is the frequency of a photon of UV radiation ( = 2.00 x 10^-7 m)? (b) Calculate the energy of a photon of UV radiation. (C) What is the frequency of a photon of infrared radiation ( = 1.083 x 10^-6 m)? (d) Calculate the energy of a photon of infrared radiation. (e) How...

Physics "Space Travel"
Suppose you want to go to the immense red giant Betelgeuse, which is about 500 light years away. (A light year is the distance that light travels in one year.) You plan to travel at constant speed in a 1000 ig rocket ship. A: If the rocket ship's speed is 0.500 c, calculate ...

math
A cone has a radius of 6 inches and a height of 9 inches a) calculate the volume of the cone. use pi. as my answer for part a i got 339.92 cubic inches,,,,,,, Is my answer correct ?? I need help doing part b and c. b) calculate a possible radius and height of a cylinder that ...

Physics
a student performing the centripetal force experiment added some mass to the 25.0g acceleration block. when he did the experiment, he found that the speed at which the accelerated block separate from the magnet was 102 m/s^2. The radius of the circular motion before breakaway ...

Physics
a student performing the centripetal force experiment added some mass to the 25.0g acceleration block. when he did the experiment, he found that the speed at which the accelerated block separate from the magnet was 102 m/s^2. The radius of the circular motion before breakaway ...

physics
Two crates A and B connected together by a light rope are pulled along a factory floor by an applied force, F. Crate A has a mass of 50 kg and the coefficient of friction (μ) between crate A and the floor is 0,25. Crate B has a mass of 35 kg and μ between B and the ...

ap chemistry
The weak acid HQ has pKa of 4.89. 1)Calculate the [H3O+] of .035 M HQ. 2)Calculate the (OH-) of 0.500 M HQ ....Am I correct? a) pKa = 4.89 => - log(Ka) = 4.89 => Ka = antilog(- 4.89) = 10-4.89 = 1.29x10-5 1. Given concentration of HQ, C = 0.035 M Dissociation of HQ is ...

Physics
A storage tank of negligible mass and 30m high is filled with gasoline. Please calculate the following. Use density values found in the book. a) The gauge pressure and absolute pressure at the bottom of the tank. b) The force that acts on a square access hatch at the bottom of...

Calculus - average velocity
*VELOCITY OF A CAR* Suppose the distance s (in feet) covered by a car moving along a straight road after t sec is given by the function s = f(t) = 2t^2 + 48t. a. Calculate the average velocity of the car over the time intervals [20,21], [20, 20, 20.1], and [20, 20.01]. b. ...

math
The ratio of Juma’s and Akinyi's earnings was 5:3. Juma’s earnings rose to shilling 8400 after an increase of 12%. Calculate the percentage increase in Akinyi’s earning given that the sum of their new earnings was shilling 14100. (b) Juma and Akinyi contribute all the ...

for Drbob222
how do I calculate pressure exerted by H2 in a Mg and HCl reaction? (weighing by redox)

chem
2 HNO3(aq) + Na2CO3(s) 2 NaNO3(aq) + H2O(l) + CO2(g) (a) Calculate H° for this reaction. kJ

ETH 125
What are some measurements sociologist use to calculate prejudice.

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