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Questions and answers about atomic and molecular mass
5 moles of h2 will produce how many grams of ammonia?
by SWEETEE46 on February 2nd, 2011
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3 answers
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in Atomic and molecular mass
by Anonymous on December 31st, 1969
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no answers
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in
What state of matter does is a single atom in?
by Mullins485468 on August 9th, 2010
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one answer
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in Atomic and molecular mass
pottasium chromate is isomorphus to K2SO4.It is found to contain 26.78 percent chromium. Calculate atomic mass of Cr.
by shivi22 on May 11th, 2010
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one answer
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in Atomic and molecular mass
way to not be borerd in mass???
by jj rox on April 1st, 2010
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2 answers
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in Atomic and molecular mass
Whats the volume of aluminum powder per >any weight unit
by ethan35t on March 22nd, 2010
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one answer
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in Atomic and molecular mass
Whats the volume of iron oxide fe3o4(rust) per >any weight unit
by ethan35t on March 22nd, 2010
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one answer
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in Atomic and molecular mass
Masses and Moles: Is this right?
How many moles are there in 213g. of chlorine molecules:
n=m/Mr
= 213/ 71
= 3 moles
by Anonymous on November 25th, 2009
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one answer
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in Atomic and molecular mass
What is H2 in moles and molar mass?
by Anonymous on November 17th, 2009
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one answer
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in Atomic and molecular mass
How do you convert 1. H2
2. CO
3. CO2
4. NO2
5. OF2
6. NaCl
7. MgS
8. H2SO4
9. CaCO3
10. Fe(OH)3 to molar mass?
by Anonymous on November 16th, 2009
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no answers
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in Atomic and molecular mass
Sodium reacts with oxygen to produce sodium oxide.
4Na(s)+O2(g)------>2Na2O(s)
-If you have 14.0 g Na, how many grams of O2 are required for reaction?
-How many grams of O2 are needed in a reation that produces 75.0 g Na2O?
by dezibookie on November 3rd, 2009
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2 answers
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in Atomic and molecular mass
Can such heretical atom exist in the nature?
by socratus on October 24th, 2009
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2 answers
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in Atomic and molecular mass
A type of wood known as white pine has a density to 05.0 g/cm3. What is the mass of a block of white pine that has the dimesions 5.0 cm by 10.0 cm by 200.0 cm?
by fred on October 19th, 2009
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one answer
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in Atomic and molecular mass
Please Help!! I need help with a math/chemistry problem: What percent of the total mass of one atom of iron comes from electrons. The mass of one iron atom is 9.274 x 10^-23. The mass of one electron is 9.110x10^-28. Please show the steps. Thank You!!
by masjete on October 3rd, 2009
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2 answers
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in Atomic and molecular mass
Please Help!! I need help with a math/ chemistry problem: The actual mass of one unknown isotope is 2.18 x10-22g. Calculate the atomic mass of this isotope. Please show me the steps to solving this type of problem and thank you very much!!
by masjete on October 3rd, 2009
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one answer
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in Atomic and molecular mass
How many grams of oxygen atoms are there in 10 moles of KClO3
by Anonymous on September 27th, 2009
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one answer
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in Atomic and molecular mass
What is the theoretical yield (in grams) of vanadium that can be produced by the reaction of 40.0 g of V2O5 with 40.0 g of calcium based on the following chemical equation? ___ grams V2O5(s) + 5Ca(l) → 2V(l) + 5CaO(s)
by Anonymous on September 27th, 2009
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one answer
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in Atomic and molecular mass
What is the maximum number of grams of ammonia, NH3, that can be obtained from the reaction of 10.0 g of H2 and 80.0 g of N2? ___ grams
N2 + 3H2→ 2NH3
by Anonymous on September 27th, 2009
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one answer
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in Atomic and molecular mass
How many moles of phosphine gas (PH3) are produced for every 4.0 moles of hydrogen gas that react according to the chemical equation below? 6 H2(g) + P4(s) → 4 PH3(g)
by Anonymous on September 27th, 2009
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one answer
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in Atomic and molecular mass
A 1.47-g sample of an enzyme is used to make a 6.20-mL solution. What is the molar mass of the enzyme if the osmotic pressure of the solution at 298K is 0.202 atm? Note that enzymes are nonelectrolytes.
by ChocolatePie on September 13th, 2009
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no answers
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in Atomic and molecular mass
How to i convert volume to mass?
by robotattack on August 20th, 2009
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one answer
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in Atomic and molecular mass
What mass of hydrogen is produced when 0.24 grams of magnesium react with excess hdrocloric acid?
by Anonymous on August 18th, 2009
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one answer
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in Atomic and molecular mass
What mass of hydrogen is produced when 0.24 grams of magnesium react with excess hydrocloric acid?
by Anonymous on August 18th, 2009
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one answer
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in Atomic and molecular mass
Whats the molar mass of copper sulfate anhydrous form
by bear2010 on July 22nd, 2009
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3 answers
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in Atomic and molecular mass
If a substance was burned and the mass of the product is still the same with the original sample, is the substance element or a compound?
by liette20 on July 5th, 2009
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one answer
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in Atomic and molecular mass
Calculate the density of sodium chloride with an unknown concentration. Th esolution has a masss of 11.1239 g and a volume of 10.30mL. What is the density of the solution?
by Patrice on June 24th, 2009
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2 answers
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in Atomic and molecular mass
If matter can neither be created nor destroyed does that mean that the earth has had the same mass since the dawn of time?
by eyeofthetiger on June 23rd, 2009
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3 answers
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in Atomic and molecular mass
Given 3.1 grams of CuSO4: a. How many moles of CuSO4 is that? b. How many Cu molecules is that? c. How many moles of Cu are in the sample? d. How many moles of O are in the sample? e. What is the mass of SO4 in the sample?
by Aerli666 on June 18th, 2009
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one answer
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in Atomic and molecular mass
The combustion data for an unknown compound containing carbon, hydrogen and oxygen was analyzed and the empirical formula for the unknown was found to be CH2O. The molar mass of the unknown was found to be 120 g/mol. What is the molecular formula for the
by Chi Chi on June 17th, 2009
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3 answers
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in Atomic and molecular mass
An oxide of manganese is 72.0 percent manganese by mass. The molar mass of the oxide is 229 g/mol. What is the formula of the compound?
by Anonymous on June 11th, 2009
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2 answers
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in Atomic and molecular mass
Since photons have mass does that mean they are Catholic?
by June on May 29th, 2009
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5 answers
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in Atomic and molecular mass
Hydrogen gas reacts with copper (ll) oxide to form copper metal and water vapor according to the reaction: CuO+H(2) -> Cu+H(2)O. What mass of copper is produced if 255 L of hydrogen at STP are used up in this reaction?
by Anonymous on May 28th, 2009
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one answer
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in Atomic and molecular mass
Which has the greater mass, 1.204x1024 molecules of molecular hydrogen or 1.204x1024 molecules of water?
by mccarthy on April 29th, 2009
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4 answers
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in Atomic and molecular mass
Given that a carbon atom has a mass of 12 amu, how many carbon atoms are there in a diamond with a mass of 2 g?
by skippy on March 31st, 2009
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one answer
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in Atomic and molecular mass
Given that 12 g of carbon combines completely with 16g of oxygen to form carbon monoxide, how much carbon monoxide (in grams) can be made from 24 g of carbon and 80 g of oxygen?
by skippy on March 31st, 2009
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one answer
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in Atomic and molecular mass
If a 15.98 g sample of banana is found to contain 29.6% oil, what mass of banana oil was obtained?
by aiden44 on March 10th, 2009
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one answer
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in Atomic and molecular mass
A standard solution of NaOH is 1.000 M. What mass of NaOH is present in 100.0 mL of the solution?
by Stoikality on March 2nd, 2009
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2 answers
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in Atomic and molecular mass
If the impirical formula is Na12C2HO... and the molar mass is to be 210G/mol... then what would be the molecular formula of the compound?
by MichelleL on March 2nd, 2009
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one answer
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in Atomic and molecular mass
How many grams are in 2.3 x 10-4 moles of calcium phosphate,Ca3(PO3)2? the -4 is an exponent. demonstrate please?
by Anonymous on February 9th, 2009
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one answer
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in Atomic and molecular mass
How many grams are in 3.3 moles of potassium sulfide,K2S( the two is lower case)? demonstration please?
by Anonymous on February 9th, 2009
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one answer
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in Atomic and molecular mass
How many grams are in 0.02 moles of beryllium iodide, Bel2? demonstration please?
by Anonymous on February 9th, 2009
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one answer
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in Atomic and molecular mass
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