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an explanation that is based on prior scientific research or observations and that can be tested
Determine the specific heat of a material if a 12g sample absorbs 48J of heat as the temperature rises from 20°C to 40°C.
The electron configuration of chlorine is _____________.
The ___________________ are the principle quantum numbers showing the energy levels. The ___________ are the orbitals.
Electronegativity ____________ as you go down a group and ____________ as you go across a period.
A __________ bond is when electrons are shared. It usually forms between a _______________ and a _______________.
The reactant that controls the amount of product formed in a chemical reaction is the ______________ reactant.
As the temperature of a gas increases, pressure ____________. Decreasing the volume of a gas causes the pressure to ______________.
Acids react with bases to produce ___________ and ____________. This is called a _________________ reaction.
What is sublimation?
the phase change in which a substance changes from a solid to a gas or vapor without changing to a liquid
Use a solubility curve to answer the next three questions. What is the solubility of KCl at 30°C?
Use a solubility curve to answer the next three questions. What type of solution is it if 25g KCl are dissolved in 100g water at 30°C?
Use a solubility curve to answer the next three questions. What type of solution is it if 55g KCl are dissolved in 200g water at 40°C?
If 0.940g of a compound containing only magnesium and oxygen consists of 0.564g Mg, what is the compound's empirical formula?
Write the chemical equation for the reaction between aluminum and iron (III) oxide to produce aluminum oxide and iron. How much iron would be produced from 52.5g of iron (III) oxide?
What mass of barium chloride will be needed to react completely with 113g of aluminum sulfate to produce barium sulfate and aluminum chloride?
In the reaction between calcium hydride and water, the theoretical yield of hydrogen gas from 75.0g calcium hydride is 7.18g. In running this reaction, the actual amount of hydrogen collected was 6.94g. What is the percent yield of this reaction?
If 35.0g of nitrogen react with 11.5g hydrogen in the synthesis of ammonia, which is the limiting reactant? How much ammonia is produced?
A 185mL sample of oxygen is collected over water at 30°C. The total pressure of the system is 8.9 kPa. What is the pressure of the gas? (PH2O at 30°C is 4.2kPa)
A balloon contains 1.5L of air at 175kPa and 25°C. If the balloon expands to 1.7L at 30.°C, what is the pressure of the air in the balloon?
A 2.25L sample of carbon dioxide is collected at 58°C and standard pressure. Determine the mass of the gas in the sample.
Calculate the molarity of a solution containing 19.6g phosphoric acid in 425 cm3(mL) of solution.
If 25.0 cm3(mL) of 0.400M HBr, is required to neutralize 55.0 cm3(mL) of KOH solution, what is the concentration of the KOH solution?
How many cm3(mL) of 0.125M HCl would be required to exactly neutralize 20.0 cm3(mL) of a 0.140M NaOH solution?
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