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April

Questions Asked on April 8, 2017

4Fe + 3O2 ---> 2Fe2O3 Delta H -1652 kJHow much heat is released when 10 g Fe and 2 g O2 are reacted.
1. 1 answer
2. asked by Victor
3. 1,478 views
If cos x = 4/5, 0° x 90°, find the valueof (1 + tan x)/(1 - tan x)
1. 2 answers
2. asked by Lucky
3. 1,403 views
A swimmer sets off from one bank. The velocity of the swimmer relative to the water is 1.2 m / sat 45° to the river banks, as
1. 3 answers
2. asked by Saeed
3. 1,476 views
In about (500 words)write a composition ending with "when i woke up i realised that it was only a dream"
1. 1 answer
2. asked by JOHN
3. 603 views
Prove that there exists no positive real number such that:4x^2+1/4x <1 Can I simplify this inequality in the following way:
1. 4 answers
2. asked by Anon
3. 614 views
How many liters of chlorine gas at 25C and 0.950 atm can be produced by the reaction of 24.0 g of MnO2 with hydrochloric acid?
1. 2 answers
2. asked by Victor
3. 4,162 views
The reactionFe + Br2 ---> FeBr2 Delta H = -249.8kJ Calculate delta H when 10.0 g of FeBr2 is formed.
1. 2 answers
2. asked by Victor
3. 690 views
So Ag+ + Cl- ---> AgCl and delta H is -65.5 kJ. I'm supposed to calculate delta H when one mole of AgCl dissolved in water, so 1
1. 3 answers
2. asked by Victor
3. 1,827 views
solve the equation by completing the square. round to the nearest tenth. x^2+8x=10A. 1.1, 9.1 B. 1.1, -9.1 C. -1.1, 9.1 D.
1. 2 answers
2. asked by Cassandra
3. 3,001 views
what religious, economic, and political events led to the development of western Europe?
1. 2 answers
2. asked by Kanda
3. 574 views
the sunlight rae about 46 degree in a tree if the hight of trre is 8 what is length of the shadow
1. 1 answer
2. asked by ramish
3. 354 views
A person walks on the building.He slips 1m for every 5m he climbs. If the building is 53m high and he takes 5 seconds to climb
1. 6 answers
2. asked by Prateekshya
3. 5,737 views
A new process is started and the sum of the sample standard deviation for 20 subgroups, of size 8, is 750; Compute, to 3 decimal
1. 0 answers
2. asked by Cat
3. 456 views
Two dimensions. In the figure, three point particles are fixed in place in an xy plane. Particle A has mass mA = 4 g, particle B
1. 1 answer
2. asked by fadi
3. 1,375 views
Find the length of an arc of a circle of radius 5.6cm which subtends an angle of 60°at the centre of the circle of the circle
1. 1 answer
2. asked by Adeleye charlot
3. 630 views
solve the equation by completing the square. round to the nearest tenth. x^2+8x=10A. 1.1, 9.1 B. 1.1, -9.1 C. -1.1, 9.1 D.
1. 3 answers
2. asked by Cassandra
3. 1,204 views
A 30 g sample of water at 280 K is mixed with 50 g of water at 330 K. Calculate the final temperature of the mixture assuming no
1. 1 answer
2. asked by Victor
3. 2,236 views
Consider the combustion of propane. Delta H is -2221 kJ. Assume all heat is from combustion of propane. What mass of propane
1. 1 answer
2. asked by Victor
3. 12,111 views
What is the mechanical advantage of a machine that used 600N to overcome a load of 1200
1. 1 answer
2. asked by Eric
3. 505 views
The points plotted on the coordinate plane below are three vertices of a rectangle.ht tp : //imgur dotcom /a/eix1I What are the
1. 47 answers
2. asked by Dejavu
3. 13,126 views
from newton's second law of motion derive the formulae F=ma
1. 1 answer
2. asked by obura
3. 565 views
gaseous butane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water. Suppose 38.9 g of butane is
1. 3 answers
2. asked by John
3. 1,438 views
Jungle Warehouse signed a 9-month simple discount note with a face value of $5,600. Find the proceeds if the discount rate is
1. 1 answer
2. asked by mac
3. 1,419 views
Let f(x) = 3x^2 – x + 2 and g(x) = 5x^2 – 1. Find f(g(x)). Show each step of your work.I got 75x^4 -35x +6 If that is wrong
1. 2 answers
2. asked by Sanjay
3. 544 views
In the year 1997, the surface elevation of Lake Powell was 3887 feet above sea level. In the year 2001, the surface elevation of
1. 1 answer
2. asked by Cindy
3. 720 views
Given the expression 5a^2b – 13ab + 7a^3 – 4b, do the following as instructed below:Put it in decending order. I got
1. 1 answer
2. asked by Marcus Peerbocus
3. 669 views
So I am doing this science experiment about light. I chose to do one where you put a pencil in a glass of water and the light
1. 0 answers
2. asked by Reeses
3. 524 views
Calculate the distance between the two proton such that the electrical repulsive force between them is equal to the weight of
1. 2 answers
2. asked by Ayushi
3. 2,037 views
a car of mass 1000 kg moving at a speed of 20 m/s is brought to rest through a distance of 100 m by applying the
1. 2 answers
2. asked by pherlysstar
3. 935 views
ht t p: / / imgur. c o m / a/ Fn4ghI really need help with this question, I believe it is C, can someone help please? P.S: put
1. 1 answer
2. asked by Dejavu
3. 589 views
If the sides of a triangle are tripled, by what number would the area be multiplied?I Don't understand the question so I don't
1. 1 answer
2. asked by Sainatha. B
3. 521 views
a forklift lifts a 100 kg of concrete through a vertical height of 16 m in 20 sec.the power applied to the motor un driving the
1. 1 answer
2. asked by pherlysstar
3. 626 views
I am completely lost with this question. If 50 ml of 0.5M HCl is added to 800 ml of pure water, what will be the approximate pH
1. 2 answers
2. asked by Sarah
3. 379 views
I keep getting this wrong and can't figure out why{60x+10y=-16 -50x-100y=50 The solution to the system is:
1. 2 answers
2. asked by Carlos
3. 542 views
If the length of a triangle is 6cm and 4cm respectivly what will be the length of third side
1. 1 answer
2. asked by Patil mayuri
3. 474 views
Find the values of e,a,b,and c for r=21/5-2costheta?
1. 1 answer
2. asked by Anonymous
3. 728 views
I need help ?you are employed as an IT manager in GOTEC ,which is a small sized company (with 20 employers )that is based in
1. 0 answers
2. asked by maryam
3. 725 views
{-9x-3y=147-x+7y=-101 The solution of the system is:
1. 0 answers
2. asked by Carlos
3. 386 views
I need help ?you are employed as an IT manager in GOTEC ,which is a small sized company (with 20 employers )that is based in
1. 0 answers
2. asked by maryam
3. 715 views
If there are 45 drops of alcohol/mL, and the density of alcohol is 0.789 g/mL, what is the blood alcohol concentration of your
1. 0 answers
2. asked by Courtney
3. 830 views
How many squares in the plane have two or more vertices on dots in this 2x3 grid? All dots are an equal distance from their
1. 40 answers
2. asked by Thomas
3. 4,516 views
The maturity value of a $28,000, 6%, 60-day interest-bearing note on August 6 is
1. 1 answer
2. asked by leah
3. 1,711 views
What is the percentage recovery if 0.98g of copper is left when reacting 0.5g of copper sulphate with excess zinc?
1. 0 answers
2. asked by Erron
3. 472 views
Five years ago, A was three times as old as B and ten years later, A shall be twice as old as B. What are the present ages of A
1. 2 answers
2. asked by ravindar
3. 583 views
A river is flowing at 3mps.A man can swim in still water at a speed of 6mps.The angle at which the bank at which the swimmer
1. 1 answer
2. asked by Anonymous
3. 542 views
Let f(x) be a twice differentiable function (i.e. f(x), f′(x) and f′′(x) are defined for all x), and let a ∈ R (a is a
1. 0 answers
2. asked by Kenny
3. 695 views
For each of the following examples:i) Express the negation of the statement using propositional notation, simplifying as much as
1. 1 answer
2. asked by Kenny
3. 609 views
Adeline and Mandy had some money in the ratio 3:7. After Adeline receive $92 and Mandy receive $40, both girls had an equal
1. 1 answer
2. asked by Kathy
3. 450 views
Hello,Struggling to get my head around this. So we have this statement. ----------------------------------- If it rains on
1. 2 answers
2. asked by Anon
3. 577 views
if Mr Dhaka earn N$ x in a week and spend N$ y, what part of his weekly salary did he save?
1. 1 answer
2. asked by vaino
3. 390 views
Find the length of an arc of a circle of radius 5.6cm which subtends an angle of 60°at the centre of the circle take pie 22 \7
1. 2 answers
2. asked by Adeleye charlot
3. 919 views
Factorize completely 16y³+16y² +4y
1. 1 answer
2. asked by Adeleye charlot
3. 786 views
Construct a quadrilateral ABCD such that /AB /=4cm, /BC /,=5cm, /AD /=3.5cm and CAB=30°.measure /AB/
1. 2 answers
2. asked by Adeleye charlot
3. 888 views

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