 Lv 1143 points

# Emma

• ### Find where increasing/decreasing, concavity, local extrema and inflection points ?

for f(x)=ln/x

find where increasing/decreasing, concavity, local extrema and inflection points

show work please this is complicated and I am confused how to explain

• ### Find limit using l'hopitals rule ?

Find (if it exists) limx→0 xe raised to the -1/x using L'hopitals rule

• ### At what pH is the amino acid dissociated?

At what pH is the amino acid glycine with a Ka of 2.51 x 10-10 96% percent dissociated? A) 9.60 B) 10.60 C) 9.89 D) 10.10

• ### What is pH of a solution ?

What is the pH of a solution made by mixing 40.00 mL of 0.10 M HCl with 30.00 mL of .10 M KOH? Assume that the volumes of the solutions are additive

• ### Calculate solubility?

8) Calculate the solubility (in g/L) of mercury carbonate in water at 25°C if the Ksp for Hg2CO3 is 8.4 x 10-12

A) 4.4 x 10-2 g/L B) 3.5 x 10-2 g/LC) 05.9 10-2 g/L D) 8.0 x 10-4 g/L

Chemistry1 week ago
• ### What is pH prepared by mixing 25.00mL?

What is the pH of a solution prepared by mixing 25mL of .10M CH3CO2H with 25 mL of .010M CH3CO2Na? Assume that the volume of the solutions are additive and that Ka= 1.8 x 10-5 for CH3CO2H

• ### When 50mL of .10M NaF is added?

When 50 mL of 0.10 M NaF is added to 50 mL of 0.10 M HF, relative to the pH of the 0.10 M HF solution the pH of the resulting solution will a) become 7. b) decrease. C. increase d. Remain the same

• ### The titration of water soluble vitamin C found 14.50 mL of 0.200 M NaOH was required to react completely with 0.670 g of vitamin C tablet?

The titration of water soluble vitamin C found 14.50 mL of 0.200 M NaOH was required to react completely with 0.670 g of vitamin C tablet. What is the percentage of Ascorbic acid in this Vitamin C tablet? Vitamin C active ingredient is Ascorbic acid and it reacts with NaOH as below. Molecular formula of Ascorbic Acid is HC6H7061 Enter only numerical answer without % mark] HC6H70. (aq) + NaOH(aq) = H20 (1) + NaC.H70. (aq)

Personal Finance2 weeks ago
• ### In which solution is [H+] equal to .100M?

Options:

A. 0.100 M CH3COOH(aq)

B. 0.100 M H2SO4 (aq)

C. 0.100M HCl (aq)

Can be more than one answer

• ### Predict the sign of delta S?

Predict the sign of delta S of the system:

1. 2C (graphite) +O2 (g)--> 2CO (g)

2. C4H10(g)--> C4H10(l)

Options

A. Delta S should be negative for both

B. Delta S should be negative for 1 and positive for 2

C. Delta S should be positive for 1 and negative for 2

D. Delta S should be positive for both

• ### Integrals in calculus problem?

• ### Determine the value of each of the following?

Find g(-8)

g(-4)

g(1)

g(5)

The absolute max of g(x) occurs at x=

and is the value=

Mathematics2 weeks ago
• ### Use the area of the shapes in the graph and the laws of definite integrals to solve?

I got -2 but I am not sure if that is right, or how to integrate the graph into solving

• ### Given the dissolution of borax find moles....?

Given this table and the chemical equation for the dissolution of borax

Na2[B4O5(OH)4] • 8H2O --> 2Na+ + B4O5(OH)2- 4 +8H2O

<--

find moles of H+, moles of borax, molar solubility and Ksp

Chemistry2 weeks ago
• ### find theoretical yield?

The reaction is FeCl3+ 3K2C2O4+ 3H2O -> K3Fe(C2O4)3 * 3H2O + 3KCl

The moles of FeCl3 were found to be 0.0123 mol, so you have to use this to find the moles of K3Fe(C2O4)3 * 3H2O and then convert to grams to get theoretical yield.

The stoichiometry is what is confusing me to find the moles of  K3Fe(C2O4)3 * 3H2.

• ### Why would you heat a solution before titration? ?

Specifically why do you heat an oxalate and sulfuric acid mixture before titrating with potassium permanganate?

• ### Find the values given the information below?

I am very confused, I tried to substitute/use what was given but its not correct.

• ### Apply geometry, the graph and the law of definite integrals to solve ?

Solve for ∫ (-2 on top/over the sign, 4 under/bottom of sign) times f(x) dx. From my research you have to find F(x) first but Im not sure how or where to start to apply and use the law of definite integrals to solve

• ### Given the second derivative find f(x)?

f’’(x)= 8x+ 9sin(x)

f(0)= 4

f’(0)= 3

find what f(x) is