# Christopher

### Chemistry (give appropriate reagents & observations)?

1 AnswerChemistry1 year ago### Chemistry acid-base question?

For a 0.1mol/L of monoprotic weak acid (HA) at a certain temperature, the ratio between the unionized and ionized molecules is 50:2, find the value of ionization constant (Ka) for the acid, HA.

1 AnswerChemistry1 year ago### Factorise the following?

(i) (a-1)^3 -8 + (a+1)^3 +6(a²-1)

(ii) x²-y²-2z²+zx+3yz

3 AnswersMathematics1 year ago### If the function f:R->R satisfies f(2x-1)=5x+2, find f^(-1) (3x+1)?

given answer: (6x-7) /5

3 AnswersMathematics1 year ago### What's up chemistry?

A saturated calcium hydroxide solution is prepared. 25mL of this solution is titrated with 0.05mol/L hydrochloric acid and 23.75mL are required for completed neutralization. Calculate the solubility product of calcium hydroxide.

1 AnswerChemistry1 year ago### The figure shows the curve represented by the polar equation r=cos 3θ ,0≤θ≤π. Find the area of the region enclosed by the curve?

Answer given is π/4

1 AnswerMathematics1 year ago### Math Pro PLs solve?

Given that O is te origin , and the polar coordinates of A and B are (-3, 7π/6) and (5, -π/2) respectively. Find the area of 🔺OAB.

The answer provided = (15√3)/4

2 AnswersMathematics1 year ago### If the length of the tangent from the point (a,1) to the circle x²+y²+5x+7y+3=0 is 5, find the value of a.?

given answer -7 or 2

2 AnswersMathematics1 year ago### Complex number math?

Given that z is an imaginary root of the equation x⁵=1 and z≠1, find the value of z+z^2+z^3+z^4.

given answer is -1

7 AnswersMathematics1 year ago### Circle (Math)?

A circle with center on the x-axis passes through point A(-1,1) and B(1,3). Find the equation of this circle.

5 AnswersMathematics1 year ago### Math Question?

Show that the curve of the equation=3/(2sinθ-cosθ) is a straight line

1 AnswerMathematics1 year ago### Chemistry experts do you know how to solve this?

If the formula of sulfate of a metal is Rn(SO₄)m. What is the formula of the chloride of R?

4 AnswersChemistry1 year ago### Math Question of de moivre's theorem?

Find the principal values of am(4+3i)^(1/3)

(am is amplitude)

2 AnswersMathematics1 year ago### Math Experts pls help?

A wire of length 6m is cut to form 15 squares and arranged in order of increasing size. Suppose the difference between the perimeters of any two consecutive squares is 4cm, find the length in cm of the side of the smallest square.

2 AnswersMathematics1 year ago### Math Complex numbers?

x^8=1, one root is α=cosπ/4+i sinπ/4. Prove that the roots can be expressed as 1+α+α²+α³+......+α⁷ if can also represent them on Argand diagram .Prove that also 1+α+α²+α³+......+α⁷=0

2 AnswersMathematics1 year ago