Monday
December 9, 2013

# Posts by shelly

Total # Posts: 250

chemistry 12
Calculate [H3O+] and [OH-] in 0.18M hyrdobromic acid, HOBr(aq) having, Ka of 2.0 x 10^-9

chemistry 12
sketch a ph curve for the titration 40.00 mLof 0.100M hyrazine H2NNH2(aq) having a Kb of 3.0 x 10^-6 by 0.100 M HCIO4(aq)

chemistry 12
Calculate [H3O^-] in a 0.15M solution of benzoic acid, HC7H5O2(aq) having a Ka of 6.4 x 10^-5 I got. 6.4x10^-5=(x)(x)/0.15 6.4x10^-5= x^2/0.15 6.4x10^-5 x 0.15 = x^2 square root of 9.6x10^-6 = square root of x^2 x= 0.003098 The pH solution is -log [0.003098] = 2.50 b.) Calcula...

chemistry 12
Identify the two conjugate acid-base pairs in each of the following. a.) H2PO4-(aq)+HSO4-(aq) <=> H2PO4(aq)+ SO4^-2(aq) b.) HI(aq)+ CN-(aq)<==>HCN-(aq)+ I-(aq)

Chemisrty
How many milliliters of a 2.0M NaOH solution are needed to neutralize 20.0 ml of a 2.5M CH3COOH solution? How do I begin to figure this out?

math
A movie theater runs two films continuously. One film runs for 85 minutes and a second film runs for 100 minutes. Both movies begin at noon. When will the two films start again at the same time?

calculus
Damon, so what you did was apply the quotient rule to the ax part? Wouldn't the -8 be -8x then? And if I'm doing it right, would my final equation be this? 0=(5x^4+10x^3+x^2+4x+4)/(x^2+x+2)^2

calculus
f(x)=8/(x^2+x+2) Set up an equation, which when solved will give the points where the tangent line has y-intercept 5.

statistics
The following gives the height of 100 men in centimeters. 153 162 168 154 151 168 162 153 161 167 157 154 165 156 163 165 160 171 170 173 164 158 163 155 167 162 168 153 161 166 163 162 163 163 163 164 165 163 162 162 163 161 162 162 158 162 167 158 169 168 168 156 160 158 169...

MATH
Can someone please HELP me figure this out? According to statistics gathered as part of a research project by a group of statistics students on the college campus, 376 out of the 439 deaths attributed to lightning strikes were male. If all of the names of the deceased were pla...

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