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☆☆☆☆☆Cards in this guide (32)
How many moles of magnesium oxide are formed when 4 moles of magnesium react with oxygen
Four (4) moles of magnesium oxide are formed when 4 moles of magnesium react with oxygen.
The subscripts of a compound indicate
the ratio of elements
Which of these is determined by an empirical formula
the lowest whole number ratio of elements in a compound A+
A gas held at 798 mmHg in a 400 mL flask is released into a 3 L flask What will be the new gas pressure
106.4 mmHg
The ideal gas law measures pressure in
atmospheres A+
Laboratory data indicates a compound is composed of 43.3 percent sodium 11.3 percent carbon and 45.3 percent oxygen How many grams of each element could be presumed to be present
43.3 g Na, 11.3 g C and 45.3 g O
In the ideal gas law n represents
moles of gas particles
Sophie was asked to distinguish gases from solids and liquids Which of the following answers would be most correct
Gases are the least dense, have the greatest particle energy, and have no specific shape.
Subtracting four from the period number of an inner-transition metal will indicate the number of shells
false
Choose the compound that has a molar mass of 18 grams
Water, H2O
What is The law that states The volume of a gas increases as its pressure decreases and the volume of a gas decreases as its pressure increases
Boyle's law.
Choose the empirical formula
A+..... All Of Those
The formula for sulfuric acid is HËÃSOËÅ A mole of sulfuric acid would have a mass of grams
It would have a mass of 98 grams.
What term is defined as the number of moles of solute divided by the number of liters of solution
Molarity, abbrev. M, units: mol/L, mmol/ml
An unknown sample with a molecular mass of 180.0g is analyzed to yield 40 percent C 6.7 percent H and 53.3 percent O What is the empirical formula and the molecular formula of this compound
ch2o and c6h12o6
A compound is found be 36.5 percent Na 25.3 percent S and 38.0 percent O What is its empirical formula
Na2SO3, Sodium Sulfite.
The elements in an imaginary compound exist in the mole ratio of 1 3 1 for elements XY What will the empirical formula for the compound be
X4y3
Vinegar contains acetic acid The formula for acetic acid is CHËÄCOOH One mole of acetic acid has a mass of grams
60
Type the capital letter that represents this equation after it has been correctly balanced Press Enter
3MgCl2...
A baker uses the term one dozen to indicate a specific quantity 12 What quantity does the chemists term one mole indicate
6.02 x 10^23
When determining empirical formulas from laboratory data the mole ratio is used to determine what
subscripts
Calculate the number of moles in 27.50 grams CaCOËÄ Type the correct answer then press Enter
.2750
Using the periodic chart indicate the most common charge of magnesium
1
Calculate the empirical formula of a compound formed from 3 percent C 0.3 percent H and 96.7 percent you Which formula below correctly represents the empirical formula
Chi a+
A compound formed of 0.059 mol hydrogen and 0.94 mol oxygen has a molecular mass of 34.0 gmole What is the molecular formula of this compound
h2o2
The formula for sugar is C12H22011 how many moles of carbon are in 2 moles of sugar
If there are 2 moles of sugar. and 12 atoms of carbon per sugar molecule then there will be 24 moles of carbon atoms.
What law does the formula pv c
The formula PV = C is done by the Gas Law to measure pressure and volume's relationship.
A compound found to contain 75.7 arsenic and 24.3 oxygen would have which of the empirical formulas below
As2O3
The formula for methane is CH4. Four moles of methane would have a mass of how many grams
Four moles of methane would have a mass of 64,12 grams.
The formula for ethyl alcohol is C2H5OH. The mass of 2 moles of ethyl alcohol would be how many grams
The mass of 2 moles of ethyl alcohol would be 92,14 grams.
Use the electronegativity chart to determine the type of bond that will form between this pair of elements.
Use the electronegativity chart to determine the type of bond that will form between this pair of elements.
N + N
Choose the best definition of STP
a term that indicates a combined measurement of standard atmospheric pressure and room temperature. A+
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