Questions asked by KiraTiss
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Why would you get electrocuted if you went swimming in a pool during an electrical storm? Hint: think about what people put in pools in order to kill bacteria.

Composite function : If #f(x)= 3x+1# and #g(x) = x/(x^2+25)#, how to solve #g(f(x))=0# ?

Function f and g are defined by f(x) = #sqrt((x^22x))# and g(x) = 3x +4. The composite function is undefined for x ∈ ]a;b[ . Find the value of a and b?

5,7% of error in a Hydrated Crystal lab, is it too high?

What amount of atoms, in mol, is present in 128g of sulfur dioxide? Why?

Which sample of fluorine gas, F2, contains the greatest number of fluorine molecules? (multiple choice)

What is the total number of ions present in the formula Na2SO4?

A compound has a molar mass of approximately 56 #g.mol^(1)#. Which compound might this be? (multiple choice)

Which sample has the greatest mass? (multiple choice)

What would be the empirical formula of a hypothetical compound that contains 60% by mass of element A (#A_(r1) = 10#) and 40% by mass of element B (#A_(r2) =20#)?

When 60g of calcium carbonate is heated, 16.8g of Calcium oxide are formed. What is the percentage yield? (multiple choice)

What volume of ammonia, in #cm^3#, can be prepared by reacting 20 #cm^3# of nitrogen gas with 30 #cm^3# of hydrogen gas?

What amount, in mol, of carbon dioxide will be formed when three moles of methyl propane are combusted completely?

10 #cm^3# of carbon monoxide and 10 #cm^3# of oxygen are mixed. What will be the total volume of gas present, in #cm^3#, after the reaction?

Which solution contains 0.2 mol of potassium hydroxide, KOH? (multiple choice)

What volume of, in #cm^3#, of 0.200 mol of #dm^(3)# NaOH is required to neutralize 25.0 #cm^3# of 0.100 mol #dm^3# of H2SO4?

How much energy is released when 14.0 g of carbon monoxide are completely combusted?

(R + RCos (2,57 (20)) = 12), How to solve for R?

Is Fritz Haber consider as a criminal against humanity?

Why concentrated sulphuric acid is used as a catalyst instead of dilute sulphuric acid or a weak acid in esterification?

What is the equilibrium of concentrated nitric acid + sulfuric acid to form nitrobenzene obtained by nitrating benzene?

The second and fifth term of a geometric series are 750 and 6 respectively. Find the common ratio of and the first term of the series?

The velocity of a particule is v = 2t + cos (2t). When t = k the acceleration is 0. Show that k = pi/4?

Why does i2 (iodine) has a oxidation number of 0?

A student wants to investigate the amount of Ascorbic acid in orange juice, with a simple NaOH titration what other substances/compounds of the juice might interfere the results, to which extent?

How do you calculate the amount of ethene (in moles) in 100 cm3?

Let f(x) =x^2+Kx and g(x) = x+K. The graphs of f and g intersect at two distinct points. Find the value of K?

What is the difference between the Endometrium and the uterine lining?

If we bury organic matter deep enough, would it produce fossil fuels?

Why can't we stop methane from leaking?

Is there a membrane that stop liquid water but let Methane gas in?

How do you name the polypeptide AlaSerGlyValThrLeu?

Which Chloride should have the greatest covalent character?

Nernst Equation, what is the 2.303 value used in some case of the equation? Mathematically, where does it come from?

A proton moving with a speed of vo = #3.0 * 10^4 m/s# is projected at an angle of 30o above a horizontal plane. If an electric field of 400 N/C is acting down, how long does it take the proton to return to the horizontal plane?

Four charges are brought from infinity and placed at one meter intervals as shown. Determine the electric potential energy of this group?

Two protons, each of charge #+1.60 * 1019 C#, are #2.00 * 105 m# apart. What is the change in the electric potential energy of this pair of charges if they are brought #1.00 * 105 m# closer together?

The positive difference between the zeroes of the quadratic expression #x^2 + kx +3# is #sqrt(69)#. What are the possible values of k?

Help with signs, The sum of two numbers is 8, and their product is 9, 75, what are they?

#Area = 210x  2x^2#, what value of x gives the maximum area?

How to solve #16 + 2^x = 2^(x+1)# without calculator?