Thursday
October 2, 2014

Homework Help: chem

Posted by Angel Locsin on Friday, November 30, 2012 at 12:34am.

a.)How many moles of NaOH are required to prepare 2.00L od 0.380M solution? answer is 0.760 mole of NaOH (mole/l * 2.00L)
b.)What will be the molarity of a solution if 3.50 g of KOH are dissolved in water to make 150.0 mL of solution? answer is 0.52 M KOH (gKOH/molar mass KOH=mole KOH; M=mol KOH/L)
c.)What volume of (mL) of 0.400M solution can be prepared by dissolving 5.00g of KOH in water? answer is 300mL (gKOH/molar mass=mole KOH;mole KOH * Molarity of the solution 0.400M=L of solution *ml)
d.) Calculate the weight of HCl in 35.0mL of comcentrated HCl (12.00M) solution. my asnswer is 15 g HCl ( mL to L; L * M=mol; mole* molar mass= g)
pls check my answers.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

chemistry 101 - If 15g of NaOh is dissolved in 285 g of water, calculate the ...
Chemistry - What is the molarity of the resulting saline solution when you mix 1...
Chemisty (please read soon) - which will become a buffer in 1L of H2O? a) 0.3 ...
Chemistry - NaOH + HS0-+ Hp + NaS0 24 24 Which of the following is the number of...
CHEMISTRY - Not for homework, just practice problems I'm having trouble with. ...
Chemistry - I've been working on this problem for hours and cant figure it out. ...
chemistry - how much NaOH would be needed to dissolve in H2Oto prepare 2.00L of ...
Chemistry - Under an O2(g) pressure of 1.00 atm , 28.31mL of O2 (g) dissolves ...
Chemistry - Under an O2(g) pressure of 1.00 atm , 28.31mL of O2 (g) dissolves in...
chimestry - more volume of NaOH means more moles of NaOH (volume * molarity = ...

Search
Members