04/18/17

write a balanced chemical equation for this reaction
An important industrial process is refining iron ore in a blast furnace. Carbon trades places with Iron metal from Iron (III) oxide to produce pure  Iron and carbon dioxide gas. 
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04/18/17

What is the percent yield in the following reaction if 73 g of diatomic oxygen produced 76 g of nitric acid?
2N2 + 5O2 + 2H2O → 4HNO3
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04/18/17

What is the concentration of H3O+ in a solution with the following pH values. Enter your answer in scientific notation.
a. 4.33 b. 5.48 c. 4.78 d. 5.79
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04/18/17

What is the concentration of OH- in a solution if the pH is
a. pH = 4.07 b. pH = 0.32 c. pH = 13.68 d. pH = 7.41  
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04/18/17

A 3.00 mL sample of blood serum has a pH of 7.36
a. What is the concentration of H3O+? b. What is the concentration of OH-? c. How many moles of H3O+ are present? d. How many moles of OH- are present?  e. How many H3O+ ions are present? f.... more
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04/18/17

Sometimes the basicity of a solution is reported using pOH (pOH = -log[OH-]).
What is thea. [OH-] if pOH = 2.07 b. [H3O+] if pOH = 13.15 c. pH if pOH = 9.22
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04/18/17

Calculate the pKa of each acid.
a. C2O4H2, Ka = 5.9 x 10-2 C6O2H8, Ka = 1.7 x 10-5
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04/18/17

How many grams of carbon dioxide can be produced if given 2.0 g of propane and 4.0 g of diatomic oxygen?
C3H8 + 5O2 → 3CO2 + 4H2O
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04/18/17

math help plz
Sarah Meeham blends coffee for Tasti-Delight. She needs to prepare 110 pounds of blended coffee beans selling for $4.32 per pound. She plans to do this by blending together a high-quality bean... more
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04/18/17

math help plz
Gabe Amodeo, a nuclear physicist, needs 90 liters of a 50% acid solution. He currently has a 30% solution and a 60% solution. How many liters of each does he need to make the needed 90 liters of... more
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04/18/17

math help plz
A first number plus twice a second number is 18. Twice the first number plus the second totals 15. Find the numbers.The smaller of the two numbers is .
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04/18/17

CaS(aq) + Al(NO3)3(aq) --> Ca(NO3)2 + AlS3(aq). How many mols of AlS3 will be produced from 6 mols of CaS?
Thank you!
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04/18/17

Word Problem Help!!
Alexis just bought a brand new sweater for $45. She got it on sale at a discount of 20% off of the original price. How much did the sweater originally cost? Compose an algebraic equation and solve.
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04/17/17

In a zoo, the adult polar bear weighs three times more than the baby elephant. Together they weigh 700 kilograms. How much does the polar bear weigh.
I'm having trouble with this.
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04/17/17

The Louisiana State Capitol Building has 34 floors. What is a good estimate for the height of the Louisiana State Capital Building
needed help 
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04/17/17

math help plz
A 30% solution of fertilizer is to be mixed with a 70% solution of fertilizer in order to get 160 gallons of a 60% solution. How many gallons of the 30% solution and 70% solution should be... more
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04/17/17

math help plz
In a recent election Corrine Brown received 13,816 more votes than Bill Randall. If the total number of votes was 119,234, find the number of votes for each candidate. Corrine Brown received... more
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04/17/17

math help plz
Kathi and Robert Hawn had a pottery stand at the annual Skippack Craft Fair. They sold some of their pottery at the original price of $9.50 for each piece, but later decreased the price of each... more
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04/17/17

math help plz
Sarah Meeham blends coffee for Tasti-Delight. She needs to prepare 190 pounds of blended coffee beans selling for $3.82 per pound. She plans to do this by blending together a high-quality bean... more
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04/17/17

An item on sale costs 80% of the original price. If the original price was $45 , what is the sale price?
i do not understand this, adn really need you rhelp
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04/17/17

luke bought 6 doughhnuts. there were 3 doughnut with sprinkles. which fraction represents the doughnuts Luke bought that had sprinkles
1. 1/5  2. 1/3  3. 2/4 4. 6/10
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04/16/17

the sum of two numbers is 48 and the larger number is 14 more than the smaller number. Write two equations and solve them to find the two numbers
SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS S S S S S S S S S S S S  S S S 
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04/15/17

ratio word problem
A city votes to raise taxes. The ratio of yes votes to no votes is 5 to 3. If there are 4600 total votes, how many yes votes are there?
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04/15/17

At a bike shop, it costs $10 to rent a bike for 3 hours. How many dollars does it cost per hour of bike use?
At a bike shop, it costs $10 to rent a bike for 3 hours. How many dollars does it cost per hour of bike use?
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04/15/17

A printer prints 20 pages in 9 minutes. How many minutes does it take per page?
A printer prints 20 pages in 9 minutes. How many minutes does it take per page?
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