Answers by visitors named: Jeconiah

Calculate the mass of lithium hydroxide that must be added to 50ml of water so that it may react exactly with 5ml solution of 1.5M nitric acid.

13 years ago

When sulfuric acid reacts with ammonia solution an ammonium salt and water are produced. Calculate the volume of 3mol/dm3 of acid required to react exactly with 25ml of a 2.5mol/dm3 of ammonia solution.

13 years ago

Calulate the volume of carbon dioxide produced when 0.5 tonnes of iron are produce.When iron oxide is heated with carbon monoxide, pure iron and carbon dioxide are formed.

13 years ago

2.8g of iron (¡¡) reacted with 100ml of 2M sulfuric acid. Which reactant is in excess? And what volume of hydrogen gas is produced at RTP?

13 years ago

28g

13 years ago

2.8g of iron(¡¡) reacted with 100ml of 2M sulfuric acid. A.Which reactant is in exces? B. What volume of hydrogen gas is produce at RTP? C. How many moles of iron sulfate is produced? D. How many atoms of hydrogen gas were evolved?

13 years ago

Calculate the mass of ammonia salt that would remain if the solution were evaporated to dryness. When sulfuric acid reacts with ammonia solution an ammonium salt is produced.

13 years ago

Find the roots of x3-x2-10x-8=0

13 years ago

Calculate the mass of ammonia salt that would remain if the solution were evaporated to dryness. When sulfuric acid reacts with ammonia solution an ammonium salt is produced. 2.5M * 0.025L/2=x/132 =4.125g

13 years ago

Calculate the volume of carbon dioxide produced when 0.5 tonnes of iron are produced. When iron oxide is heated with carbon monoxide, pure iron and carbon dioxide are formed. Ans: 500000g/112g/mol= 13392.9L

13 years ago

Is this formula (Fe2O3) iron oxide?

13 years ago

Is this chemical formula (Fe2O3) iron oxide?

13 years ago

The vertices of a triangle are (-2,3),(2,1) and (2,7). What is the area of this triangle?

13 years ago

If cos x >0 ans sin x= -4/5, then tan x=?

13 years ago

Solve for x: 9/28 + 3/x+2 = 3/4.

13 years ago

The first term of the sequence is -168 and every term after the first is 8 more than term immediately proceeding it. Find the 88th term.

13 years ago

Solve for x: 9/28 + 3/x+2 = 3/4.

13 years ago

If cos x >0 ans sin x= -4/5, then tan x=?

13 years ago

A piece of wire 168cm. long is to be cut into two pieces, each to be bent to make a square. The lenght of a side of one square is to be 2cm. greater than the lenght of aside of the other. What is the area of the smaller square? Ans= 80

13 years ago

When the object is placed beyond 2f, where should you put your eyes for getting the clear image of it?

13 years ago

What is the chemical formula for alluminium hydroxide?

13 years ago

Solve for x: 9^x-3^x-8=0

13 years ago

Formulate the acronym for "READING THROUGH PARTNERSHIP"

13 years ago

What exactly do computer scientists do?

13 years ago

What is the MAIN reason for storing sodium metal in mineral oils?

13 years ago

An aqueus solution of sodium mitrate(NaNO3) contains 0.85 grams of sodium nitrate and its concentration is 0.1mol L^-1. What is the volume. in millilitres, of the sodium nitrate solution?

13 years ago

Solve this using elimination method: 4x-3y=-4

13 years ago

Use substitution method to solve x-2y-5=0, 3x-5y=8

13 years ago

Solve this pair of equations by the graphical method: 4x+y=9 , 3y-2y=49

13 years ago

Find the coordinates of the vertex of the parabola:y=x^2-8x+2

13 years ago

A cylindrical can is open at both ends. It is of height 14 cm and radius 4.2 cm. Find the external surface area of the can.

13 years ago

Sketch the graph of y=x^2-x and find the minimum value of y.

13 years ago

An aeroplane needs to fly due east from city A to city B at a speed of 400km/hr. However a 50km/hr wind blows constantly from the north. In what direction must aeroplane head and at what speed must it travel?

13 years ago

The displacement of a particle is given by: x=t^3-7/2t^2+2t-1. Find the particles initial displacement. And find when the particle is at rest.

13 years ago

Define linear momentum.

13 years ago

A model helicopter of mass 5kg rises vertically from rest to a height of 60m with a constant acceleration in 10 seconds. Calculate the total thrust with which the helicopter rises.

13 years ago

Two forces of 4 N and 6 N act at a point along the same horizontal line. What is its resultant force?

13 years ago

The sum of three times a first number n twice second number is 8. If the second number is subtravted from twice the first number, the result is 3, find the numbers.

13 years ago

When secondary alcohol oxidized it produces alkanes. Draw the structure of 2,2 dimethyl 3-butanol + oxygen and give the names for it.

13 years ago

what is deepest lake in the world?

12 years ago

solve 6x-2x^3 with first principal

12 years ago

simpliy the following: (a) {[4x^2-49]/[8x^3+27]} *{ [4x^2+12x+9]/[2x^2-13x+21]} (b) {[x^2+x-6]/[x^2+7x-6]}*{[20x^2-7x-3]/[6x^2-25x+4]}*{[4x^2-11x-3]/[6x^2-19x+3]}

12 years ago

simplify: {[3x^2+10x-8]/[5x-15]}/{[x^3+64]/[x^2-9]}

12 years ago

please help me solve these question, simlify: (x^4-y^4)/(x^3-y^3)

12 years ago

(3a^2+6ab-a-2b)/(9a^2-6a+1)

12 years ago

simplify: [(2x^2+5x-6)/(5x^2+7x-6)]*[(20x^2-7x-3)/(6x^2-25x+4)]/[(4x^2-11x-3)/(6x^2-19x+3)]

12 years ago

simplify: (9x^2-16/x+1)/(4x-3)

12 years ago

simplify: (x^2-y^2)/(x^2+y^2)

12 years ago

Find the quotients and remainder when: 4a^2 + 9b^2 + 25c^2 - 12ab + 20ac - 30bc divided by 2a - 3b + 5c

12 years ago

solve 2x^2-5x-1 divided by x-3

12 years ago

Find the quotient and remainder when: (x+1)+(x-1) divided by [1-(x+1)(x-1)]

12 years ago

solve: 2x^2-3x+5 divided by 2x-1

12 years ago

4a^2+9b^2+25c^2-12ab+20ac-30bc divided by 2a-3b+5c.

12 years ago

if (x-7) and (x-4) are the factors of px^3 + qx^2 - 5x +84, find the values of p and q.

12 years ago

solve (2x)/(-x^2 + 2)

12 years ago

Please help me to write a short narrative story based on non-traditional hero.

12 years ago

Margie is responsible for buying a week's supply of food and medication for the dogs and cats at a local shelter. The food and medication for each dog costs twice as much as those supplies for a cat. She needs to feed 164 cats and 24 dogs. Her budget is K...

12 years ago

Solve for x: log5(x-2)+ log5 (x-4) = log6(x-1)

12 years ago

Bill and Steve decide to spend the afternoon at an amusement park enjoying their favorite activities, the water slide and the gigantic Ferris wheels. Their tickets are stamped each time they slide or ride. At the end of the afternoon they have the followi...

12 years ago

Solve for X: log4(3x-7)^2 = 10

12 years ago

Slove for x: ln (x^2 -6x -16) = 5

12 years ago

log(x-2) +log8 (x-4) =log6 (x-1)

12 years ago

Find the vakue of x: (1)logx2 = 2 (2) log3x^2 = -1

12 years ago

In order to earn $1,000 in interest over 2 years at an annual rate of 4%, how much principal must be put into a saving account?

12 years ago

Over a three-year period, the total interest paid on a $4500 loan was $1620. What was the interest rate?

12 years ago

How long will it take for a $3000 savings account to double its value at a simple interest rate of 10%?

12 years ago

solve and graph y>2x-1

12 years ago

solve for the value of x: 6log (x^2+1)-x=0. please help me because I do not have any idea in this topic.

12 years ago

Find the coordinates by solving and graphing the equation : -x^2-x+30=0

12 years ago

what is the longest river in the world?

12 years ago

Jeconiah

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