03/07/18

How do I solve this problem on concentration,pH, and pOH?
Calculate the Ka for a 0.100M HF solution if the [H+] concentration is 8.13×10^-3M.   What is the [H+] in a solution of phenol (C6H5OH) if the Ka is 1.02×10^-10?   Calculate the pH and pOH of... more
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03/07/18

How do I solve this rate law problem on the reaction 2A+B==>C+2D?
The rate law for this reaction is first order in A and first order in B. If the rate law constant at 25°C is 3.01×10^2 s^-1, find the rate of reaction when the concentration  of A is 0.47M and the... more
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03/07/18

How do I solve this problem on the reaction A+2B==>C
Consider the reaction A+2B==>C. The rate law for this reaction is second order in A and second order in B. If the the rate constant at 25°C is 1.25×10^-2 s^-1, find the rate of reaction when the... more
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03/07/18

How do I solve this rate law problem?
The rate for a particular reaction is Rate=[A][B]^2. If the inital concentration of B is increased from 0.1M to 0.3M, the initial rate will increase by what factor?
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03/07/18

A substance contains 35.0 g nitrogen, 5.05 g hydrogen, and 60.0 g of oxygen. How many grams of nitrogen are there in a 150-g sample of this substance?
help! need help with this
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03/07/18

How many grams of chromium are in 17.5 g of K2Cr2O7?
 chemistry.. help!
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03/07/18

How do I solve this problem on the reaction of 2A+B==>C+D?
For the reaction 2A+B==>C+D, if the concentration of A is doubled, the reaction rate doubles. If the concentration of B is halved, there is no change in the reaction rate.   Determine the... more
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03/07/18

How do I solve this problem on a first order reaction?
The reaction 2NO2 (g)+O3 (g)==>N2O5(s)+O2(g) is first order with respect to  each  reactant.    A. Write the rate law for this reaction.   B. How does doubling the concentration of NO2... more
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03/07/18

How do I solve this rate law problem?
A reaction rate has the experimental rate law of Rate=k [A]^2   A. What happens if the concentration of A is tripled?   B. What happens if the concentration of A is reduced to 1/3 its initial... more
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03/07/18

I walked 1/4 mile daily for 6 days. How many miles total did i walk
I walked 1/4 miles daily for 6 days..what is the total miles I walked
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03/07/18

If she only wants to make half of her recipe, how many cups of chocolate chips will she need?
Phyllis is baking cookies. Her recipe calls for 2.5 cups of chocolate chips and 3.5 tablespoons of sugar.
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03/07/18

the reaction of 1.462 mol CaCl2 with 2.010 mol Na2CO3 will theoretically produce how many moles of CaCO3?
I am given moles and I always set the problem up wrong to find the moles of the product.
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03/07/18

The width, w , of a rectangle is 13 its length, l .The width, w of the rectangle is 5 inches. What is the perimeter of the rectangle?
The width, w , of a rectangle is 13 its length, l .The width, w of the rectangle is 5 inches.What is the perimeter of the rectangle?
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03/07/18

What is the formula for Barium oxide?
Formula for Barium oxide?  
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03/07/18

what would be the effect on the Cu/Fe mole ratio if some of the iron filings had been spilt after weighing?
Based on the Cu/Fe mole ratio
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03/07/18

Reactivity Trends of Periodic Table
It would be much appreciated if anyone can assist me in these two questions: a) How do you best explain the reactivity of the elements of group 17 as you move down the group? b) How do you best... more
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03/06/18

Benzene diazonium chloride is an ionic compound,,,,true or false
Is it true or false
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C

03/06/18

24.0mL of an unknown concentration of HCI are titrated with 1.8M KOH. How many moles of KOH are used if the volume titrated is 6.5mL?
Trying to figure out how to get a answer to this.
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03/06/18

For a reaction that follows the trend 1/[A]t = kt + 1/[A]0, a graph of 1/[A]t on the y-axis versus t on the x-axis will have what slope?
1. a. For a reaction that follows the trend 1/[A]t = kt + 1/[A]0, a graph of 1/[A]t on the y-axis versus t on the x-axis will have what slope? b. For a reaction that follows the trend ln[A]t = -kt... more
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03/06/18

The data below is for the reaction of NO(g) from automobiles reacting with O2(g) in the atmosphere to produce NO2(g) which is a component of smog.
1. The data below is for the reaction of NO(g) from automobiles reacting with O2(g) in the atmosphere to produce NO2(g) which is a component of smog. Experiment[NO] (M)[O2] (M)Initial rate... more
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03/06/18

1. Find the overall reaction of these three steps:
1. Find the overall reaction of these three steps:IBr(g) -> I(g) + Br(g)IBr(g) + Br(g) -> I(g) + Br2(g)I(g) + I(g) -> I2(g)
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03/06/18

How long will it take to use all of the saline solution? Give you answer in hours and minutes.
Doctors use intravenous (IV) drips to deliver fluids and medications to patients. Suppose an IV drip starts with 1,000 ml of saline and dispenses fluid at a rate of 2.5 ml per minute.
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03/06/18

How many grams of KClO3 are needed to make 393 g O2?
how to solve it
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03/06/18

A numerical on states of matter(Chemistry)
25 ml of N/10 NaOH exactly neutralize 20ml of an acid solution .what is the normality of the solution?
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03/06/18

How many grams of CaO should be produced. part b of this question
  Na2CO3 reacts with Ca(OH)2, and forms CaCO3 and NaOH. After seperating and heating CaCO3, it decomposes and CaO and CO2 are produced      a) write balanced equations b)If the experiment... more
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