How many grams are in a milligram?[red1] Give answer in scientific notation. How many centimeters are in a kilometer? [red2] Give answer as a whole number.
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Assign an oxidation number to each element in the compound:…
Assign an oxidation number to each element in the compound: Ca3(PO4)2. Don’t forget the + or – signs. Ca [red15] P [red16] O [red17]
There are 453.6 grams in 1 pound. How many kilograms are in…
There are 453.6 grams in 1 pound. How many kilograms are in 315 pounds? Give answer as a whole number. [red3] kilograms
A product weighing 14.37 g was isolated from a reaction. The…
A product weighing 14.37 g was isolated from a reaction. The amount of product possible according to the calculation was 20.55 g. what was the percentage yield? Give the answer to 1 decimal place. [red30] %
Reactions can be characterized as combination, decomposition…
Reactions can be characterized as combination, decomposition, single-displacement, or double-displacement. Categorize the following reactions. 2H2 + O2 –> 2H2O [red23] 2KOH + H2SO4 –>K2SO4 + 2H2O [red25] Fe + 2H2O –> Fe(OH)2 + H2 [red24] CaCO3 –> CaO + CO2 [red26]
Sodium combines with chlorine to form sodium chloride. Write…
Sodium combines with chlorine to form sodium chloride. Write a balanced equation for the reaction.
An irregularly shaped object weighs 68 grams. A researcher w…
An irregularly shaped object weighs 68 grams. A researcher wants to know its density so she takes a graduated cylinder and fills it to 50 ml. When the object is placed in the cylinder the water volume increases to 88 ml. What is the density of the object. Give the answer to 1 decimal place. [red38] g/ml
A sample of 400 g of methane (CH4) is mixed with 600 g of ch…
A sample of 400 g of methane (CH4) is mixed with 600 g of chlorine (Cl2). Determine which is the limiting reactant according to the following equation. CH4 + 4Cl2 –> CCl4 + 4HCl Limiting reactant: Spell out the answer. [red28] What is the maximum mass of CCl4 that can be formed? Give the answer as a whole number. [red29] grams
Give the formula for the following compounds: Magnesium phos…
Give the formula for the following compounds: Magnesium phosphate [red10] Carbon Monoxide [red11]
A 250 ml sample of oxygen gas is collected by water displace…
A 250 ml sample of oxygen gas is collected by water displacement. As a result the oxygen is saturated with water vapor. The partial pressure of water vapor at the prevailing temperature is 40 mm Hg. Calculate the partial pressure of the oxygen if the total pressure of the sample is 720 mm Hg. [red33] mm Hg