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Assuming an efficiency of 38.10%, calculate the actual yield of magnesium nitrate formed from 138.1 g of magnesium and excess copper(II) nitrate.

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SOURCE: if 80g of glucose is fermented to form 4g of ethanol,calculate the percentage yield of ethanol.

That is 4 / 80 * 100 = 5%

Posted on Dec 28, 2016

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3 Answers

Is Magnesium Transcutane oil can really help to Relieve muscle pain ?

marketed out of the netherlands 6 years ago
comes in oil or powder mix with water then apply
not only for muscle pain
its a non medically supported natural substance
looks more like a massage oil
try it once if it doesnt work for you dont buy again

Apr 30, 2016 | Herbalife Health & Beauty

1 Answer

Calculate percentage when my actual is less than mu budget

Assuming you want the result in the form :
a) 120% (if positive) or 80% (if not), then percent = Actual / Budget * 100
b) 20% (if positive) or -20% (if not), then percent = (Actual / Budget * 100) - 100

Nov 03, 2013 | Computers & Internet

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What is a yield

I'm assuming you're using a financial calculator?
Yield: The income return on an investment. This refers to the interest or dividends received from a security and is usually expressed annually as a percentage based on the investment's cost, its current market value or its face value.

Sep 04, 2013 | Office Equipment & Supplies

2 Answers

Are there different types of magnesium supplements?

Yes, there are many types of magnesium supplements that can taken either orally or applied directly to the skin.

Oral magnesium supplements:

Mineral salts

Magnesium acid complexes

Magnesium chelate

Transdermal magnesium supplements:

Magnesium oil

Magnesium gel

Magnesium bath flakes

Magnesium lotion

For more detailed information on these types of magnesium supplements, take a look at these websites:,,, and

Feb 04, 2013 | Health & Beauty

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What minerals are found in apples?

Apple Calcium Copper Iron Magnesium Manganese Phosphorus Potassium Selenium Sodium Zinc


Jan 17, 2013 | Cooking

1 Answer

1 phase , 50 Hz, 20 KVA , 2200/220 v , is connected as an auto transformer of step up type . Determine , a. The auto-transformer transformation ratio . b. Auto-transformer primary and secondary currents...

This is NOT a forum for college problem solutions. How would you have a 20 KVA transformer and an Atlas Sound AF140... these are different animals... Autotransformer is a more efficient connection when it is possible... the transformer will step the 220 up to 2200+220 volts ignoring the copper loss voltage. For proper designed transformers the primary and secondary copper losses should be close to equal... but in autotransformer connection the efficiency is improved as the added voltage of the supply going to the high voltage winding power does NOT suffer and add to the current required in the primary of this connection. The purpose of this problem is for you to discover that the efficiency of autoformer connection is higher than of a simple step up connection. Now with this carefully work the problem... The ratio I have all but given you... It is unclear what is considered full load here so I would base it on regular connection at 20 KVA at 2200 volts to calculate what the currents would be primary and normal connection... calculate resistance of primary and secondary ASSUMING equal losses primary and secondary. What isn't clear is if the loss figures are for the autoformer connection OR just the specs for normal connection. The power factor kink adds to the misery. Approach this problem by making an equivalent circuit of the transformer showing the primary and secondary resistances... again the question is are the loss figures the specs of the transformer or the actual running values for the system....

Sep 11, 2011 | Atlas Sound AF140 140 Watt Autotransformer

1 Answer

Im am baffled. my ba-II plus is not calculating TVM correctly. ive tried resetting, making sure end period was selected (i.e. ordinary annuity) but no luck. as an example i enter... n=1, i=10, pv=-1,...

It's giving you the correct answer for the problem you've input. When you specified 1 for n, you told it one month. If you specify more digits, you'll see that the answer is 1.00833333.

By default, the calculator works with annual interest rates but counts periods in months.

Jun 11, 2010 | Texas Instruments BA-II Plus Calculator

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CODE 138 name is Keith..and im assuming you have OBD II..and the code 138 means that...O2 sensor circuit,high voltage(cyclinder bank #1,sensor #2)..i hope this will help you

Nov 21, 2008 | 1996 Dodge Dakota

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