Algebra
f(x)=x^2-1 ; x = -3, -2, -1, 0, 1, 2, 3 i got 8,3,0,-1,0,3,8 as the answer when i plugged in x. how would i graph these numbers from this function?
Econ
Do people living in countries with higher real GDP necessarily have better living standards compared to countries with relatively lower GDP? Give practical example. 2. What measures would better compare the well-being (living standard) for residents of different countries? How...
Chemistry
Which of the following pairs of compounds will give a precipitate in a diluted solution?** a) Cu(NO3)2 and Na2CO3 b) KNO3 and NaCl c) MgCl2 and Ba(NO3)2 d) NH4Cl and Al2(SO4)3 A solution contains I-, Br- and OH- ions. If Ag+ is added, what will the precipitate(s) be? a) AgOH b...
Chemistry
Acetic acid dissociates/ionizes itself as follows: CH3COOH(aq) ⇔ H+(aq) + CH3COO-(aq) If you add sodium acetate, CH3COONa, to the solution: a) a precipitate will be formed b) more acetic acid will be ionized c) the concentration of hydrogen ions will decrease d) the solu...
Chemistry
A mixture of lead, magnesium, nitrate and chromate ions are present in a solution. What will the precipitate be?** a) MgPb b) Pb(NO3)2 c) PbCrO4 d) MgCO3
Chemistry
Consider the reaction 3X + Y ⇔ 2W + Z. At equilibrium, [X] is 7.0 M, [Y] is 6.0 M, [W] is 5.0 M and [Z] is 7.0 M at 298 K. The value of the equilibrium constant at this temperature is: a) 0.085 b) 0.560 c) 1.800 d) 11.760
Chemistry
0.80 mol/L of A and B are mixed. They react very slowly to produce C and D as follows: A(aq) + B(aq) ⇔ C(aq) + 2D(aq) When equilibrium is attained, the concentration of C is 0.60 mol/L and the concentration of A is: a) 0.20 M b) 0.40 M c) 0.60 M d) 0.80 M
Chemistry
In the system A(g) + 2B(g) ⇔ 2C(g) + 2D(g) ΔH=21 kJ/mol, it is possible to increase the quantity of C by: a) adding a catalyst b) decreasing the [B] c) increasing the pressure d) increasing the temperature
Chemistry
For the following acids: i. CH3COOH ii. HNO2 iii. HCN a) What is the dissociation equation in an aqueous solution? b)Give the KA expression for each of the acids. c)Identify the acid-base pairs.
Chemistry
A weak acid solution, HX 0.37 M, has a pH of 3.70. Calculate the acidity constant for this acid.
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