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chemistry
Europium has two stable isotopes, 151 Eu (150.9198 u) and 153 Eu (152.9212 u). The atomic mass given for Eu is 151.9640 u. What is the percent abundance of 153 Eu ??
asked by joan on September 21, 2011 
chemistry
Europium has two stable isotopes, 151 Eu (150.9198 u) and 153 Eu (152.9212 u). The atomic mass given for Eu is 151.9640 u. What is the percent abundance of 153 Eu ??
asked by joan on September 26, 2011 
Chemistry
The element europium exists in nature as two isotopes: 151^Eu has a mass of 150.9196 amu, and 153^Eu has a mass of 152.9209 amu. The average atomic mass of europium is 151.96 amu. Calculate the relative abundance of the two
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Dongdo and Seodo are 151 meters away from each other. ................................. 1. 151: one hundred and fiftyone 2. 151: one hundred fiftyone 3. 151: one fiftyone (What is the common way of reading the number? Are all
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Geometry
1. The Seattle Space Needle is 604 feet tall. A model for the building is 48 inches tall. What is the ratio of the height of the model to the height of the actual Space Needle? A. 151:1 B. 151:12 C. 1:151 D. 12:151 If anyone knows
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Geometry
The Seattle space needle is 604 feet tall. a model of the building is 48 inches tall. what is the ratio of the height of the model to the height of the actual space needle? A. 151:1 B 151:12 c.1:151 D.12:151
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math
The Statue of Liberty is about 151 feet tall. If the angle of elevation from a tree in Liberty State Park to the statue's top is 1.5 degrees, how far is the tree from the statue? cot 1.5 DEGREES= h/ 151 151 cot 1.5= h h= ________
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Math
AB is DC parallel to . Identify two pairs of congruent angles and the number of degrees in each congruent angle. A) FAB BAD ; both are 29°. EDC CDA ; both are 29°. B) FAB EDC ; both are 29°. ADC BAD ; both are 151°. C) CDA FAB
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Statistics
Find z such that 44.0% of the standard normal curve lies to the left of z. 0.151 0.772 0.151 1.519 1.519
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chemistry
The atomic mass of Eu is 151.96. There are only two naturally occurring isotopes of europium, 151Eu with a mass of 151.0 and 153Eu with a mass of 153.0. The natural abundance of the 131Eu isotope must be approximately
asked by Kumar on March 29, 2010