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What happens if a substance of unknown composition is heated in a sealed container As a result the mass of the container and its contents?
If a substance of unknown composition is heated in an open container will Its mass will stay the same as a result the mass of the container and its contents decreases. A substance of an unknown composition is heated in a sealed container the mass of the container and its content remains the same.
Why does the mass change when the container is not heated to constant mass?
When the container is not heated to constant mass, the change in mass could be due to remaining water evaporating, incomplete combustion of a substance causing mass loss, or impurities being present in the sample. It's important to ensure that the container is heated until constant mass to obtain accurate and consistent results in experiments.
What substance is remaining when magnesium carbonate powder is heated Also why does the mass change Thanks?
Magnesium oxide. Carbon dioxide is released as agas.
How do you determine whether an unknown substance is a carbonate or bicarbonate when comparing the mass of the substance before and after heating?
when bicarbonate is heated it decomposes into the carbonate, one water and one carbon dioxide. it is this loss of mass that will enable you to determine the identity of the anion in your unknown. make balanced equation. go moles to grams on each side using atomic mass then divide mass of carbonate by mass of bicarbonate.... aka product by reactant and if larger then 100 then it's a carbonate and subtract 100 from your answer and that is how much you gained... if smaller than multiply by 100% and then subtract your answer from 100 and that is how much you lost...
What is the amount of mass in a give volume of a substance?
The amount of mass in a given volume of a substance is known as its density. Density is calculated by dividing the mass of the substance by its volume. It is expressed in units such as grams per cubic centimeter (g/cm^3) or kilograms per liter (kg/L).
What is the value of m in the equation qmct?
The value of m in the equation qmct represents the mass of the substance being heated or cooled.
What does heat capacity depend on?
Heat capacity depends on the substance's mass, the substance's specific heat capacity, and the temperature at which the substance is being heated. It is a measure of how much energy is required to raise the temperature of a substance by one degree Celsius.
What happens if a substance of unknown composition is heated in a sealed container As a result the mass of the container and its contents?
If a substance of unknown composition is heated in an open container will Its mass will stay the same as a result the mass of the container and its contents decreases. A substance of an unknown composition is heated in a sealed container the mass of the container and its content remains the same.
What is the significance of the molar mass symbol in chemistry calculations?
The molar mass symbol in chemistry calculations is significant because it represents the mass of one mole of a substance in grams. It is used to convert between the mass of a substance and the number of moles present, allowing for accurate measurements and calculations in chemical reactions and stoichiometry.
Why does the mass change when the container is not heated to constant mass?
When the container is not heated to constant mass, the change in mass could be due to remaining water evaporating, incomplete combustion of a substance causing mass loss, or impurities being present in the sample. It's important to ensure that the container is heated until constant mass to obtain accurate and consistent results in experiments.
What is the equation for calculating the energy transferred when a substance is heated and its temperature rises?
The equation for calculating the energy transferred when a substance is heated and its temperature rises is Q = mcΔT, where Q is the energy transferred, m is the mass of the substance, c is the specific heat capacity of the substance, and ΔT is the change in temperature.
When a substance is heated what happens in mass volume and weight?
When a substance is heated, its mass remains constant because mass is a measure of the amount of matter present, which does not change during a physical change like heating. Volume may expand due to thermal expansion, where the particles move farther apart. Weight may appear to change due to differences in gravitational force, but the actual mass remains the same.
Which term is used to represent the mass of 1 mole of molecules of a substance?
This is equal to the molar mass of this substance.
A substance breaks down into its component elements when it is heated If 61.8 grams of the substance is present before it is heated what is the combined mass of the component elements after heating?
68.0 grams due to the law of conservation of mass which states that mass can not be lost but only converted.
What is the specific heat of an unknown substance if 2000 j of energy are required to raise the temperature of 4 grams of the substances 5 degrees celsius?
You cannot calculate the specific heat without knowing the molar mass of the substance in question. Units of specific heat are given in joules/mol, with no reference to molar mass there is no way to calculate the number of moles of substance being heated.
How many joules of energy were added to the saucepan?
The joules of energy added to a saucepan depend on the amount of heat applied. You can calculate it by multiplying the heat capacity of the saucepan by the temperature change and the mass of the substance being heated.
What is the significance of the molecular mass (symbol) in determining the properties of a substance?
The molecular mass (symbol) of a substance is significant in determining its properties because it affects how the substance interacts with other molecules. Substances with higher molecular masses tend to have different physical and chemical properties compared to substances with lower molecular masses. This is because the molecular mass influences factors such as boiling point, melting point, and solubility, which are important in understanding the behavior of a substance.
