Suppose that some of the compounds spilled out of the crucible after it was heated. Would that cause the percent by mass of water in the compound determined by the experiment to be too low, too high, or unchanged? Briefly explain your answer.

Q: Determination of a chemical formula, mass of crucible is 14.9234g, crucible + hydrated sample is…

A: Given  Mass of Crucible = 14.9234  Mass of hydrated sample = 1.6618 gram Mass of crucible + Mass of…

Q: Would the calculated percentage of the hydrate in a sample be too high, too low, or unaffected by…

A: The mass of water lost/the original mass of hydrate used is equal to the fraction of water in the…

Q: What does it mean when the percent yield is about the same amount as the theoretical yield?

A: Percentage yield :  Percentage yield is the ratio of actual yield to the theoretical yield  ie.…

Q: Using the moles of zinc and I− that reacted, compute the number of iodides per zinc ion in zinc…

A: Zinc ions combines with iodide ions to form zinc iodide which is a white powder.

Q: How would the following errors affect the empirical formula for the compound? That is, will these…

A: In the given experiment the student ran out of time and didn't heat mixture second time.

Q: Magnesium at start is 0.33g   mass at end is 0.49 g    Determine the number of moles of magnesium…

A: The no of moles can be calculated by the following formula. no of moles=massmolar mass Molar mass of…

Q: What type(s) of chemical reaction is (are) occurring in this experiment? (a) (b) What equipment do…

A: (a) Methanol (CH3OH) reacts with oxygen (O2) to produce carbon dioxide and water. The balanced…

Q: For our experiment, we use the starting mass of the Mg to determine the moles of H2 produced and NOT…

A: The balanced chemical equation can be written as follows: Mg  +  2HCl  →  MgCl2  +  H2

Q: How many moles of NO, are in 9.1x1024 molecules of NO2? Round your answer to 1 decimal place. Your…

A: The number of molecules = 9.1 × 1024

Q: 33. There are now about 332,400,000 people in the USA. a. How many moles of people is this? b. If 1…

A:

Q: During the Empirical Formula Lab you extinguished your “L-tube” flame without waiting for the…

A: If the reaction cools down before the L-tube flame goes out, it indicates an incomplete reaction or…

Q: Six moles of hydrogen sulfide, H2S, would consist of how many molecule

A: Interpretation -  To determine number of molecule of Six moles of hydrogen sulfide H2S -…

Q: Mole computation and percentage composition.

A: For the given problem we have to find out the number of moles, formula unit, mass percentage for the…

Q: 9. How many grams of the insecticide calcium chlorate must be measured if a sample is to contain…

A: According to the mole concept, in terms of mass, the amount of substance in moles is equal to the…

Q: Stoichiometric calculations mean: .A Gram atomic weight .B Gram formula weight .C Gram molecular…

A: Given in following question stoichiometric calculation means a.)gram atomic weight b)gram formula…

Q: 1. -X- # 0.435 moles N, ::

A: For gaseous sample, At STP, molar volume can be used to convert from volume to moles and from…

Q: Mass of product…

A: Mass is both a real body property and a measure of its resistance to motion when a net force is…

Q: The proportion of sodium hydroxide in a mixture can be determined by

A: Sodium hydroxide in a mixture can be determined by various ways. Formula of sodium hydroxide is…

Q: Calculate the moles of ammonium nitrate used in the experiment.

A: Moles: Moles is the amount of atoms, molecule present in species. One mole consists of 6.022 x 1023…

Q: 5 g of hydrated barium chloride is heated in a crucible until the mass of the sample no longer…

A: Given: Mass of hydrated barium chloride = 5 g Mass of sample after heating = 4.26 g The loss of mass…

Q: 1. Suppose that in the experiment of the empirical formula 10% of the metal (Mg) stays unreacted and…

A: Magnesium being a metal reacts with oxygen to form magnesium  oxide.

Q: a.) What is the percent composition by mass of each compound? b.) Mass to Mass Stoichiometry…

A: Hello. There are multiple subparts in the question. The first three subparts have been solved. To…

Q: Explain what the purpose of a coefficient is in a chemical formula

A: We usually balanced a Chemical Reaction equation to satisfy the law of conservation of mass.…

Q: Eight moles of hydrogen sulfide, H2S, would consist of how many molecule

A: Given, Number of moles of H2S = 8 Generally, 1 mol of substance contain 6.023 x 1023 molecules.

Q: s the formula for the limiting reagent? s the maximum amount of bromine monochloride that can be…

A: Br2(g) + Cl2(g) ---> 2BrCl(g) Moles of Br2 = 0.299 moles  Moles of Cl2 = 0.251 moles So, moles of…

Q: Define percentage by mass

A: Percentage by mass is defined as the ratio of mass of solute by mass of solution (solute+solvent)…

Q: A student begins this experiment with 3.5251 g of mixture. After sublimating the NH4Cl, the student…

A: The exact value that the student obtains is :

Q: A sample is marked as containing 47.9 percent calcium carbonate by mass. How many grams of calcium…

A: Given, mass of a sample = 58.9 gThe sample contains 47.9 percent calcium carbonate by mass. The mass…

Q: A hydrated salt is heated to determine the mole ratio of water to salt (n).  A student heated the…

A: Number of calculated hydration likely to be high, or low can be determined by checking the effect on…

Q: What might be a reason you obtained a percent yield of less than/greater than 100% for the mixture

A: The formula used to calculate the percent yield is,If the obtained percentage yield is less than…

Q: Shelly the speedy chemist did not heat her crucible prior to the addition of the hydrated salt.…

A: Given : The chemist did not heat her crucible prior to the addition of the hydrated salt.

Q: During the experiment, a student calculated the mass of chlorine in the compound to be 1.153 g. How…

A:

Q: mass

A:

Q: Convert 35.0 moles sodium bicarbonate to formula units of sodium bicarbonate. Express the answer by…

A:

Q: Can the mass of one mole of sample A be the same as the mass of one mole of sample B? Explain your…

A: 1 mole of any substance contains 6.023 × 1023 molecules, atoms or ions.

Q: How many grams of hydrogen gas are formed by the reaction of 3.457 g of aluminum with nitric acid?…

A:

Q: Unknow A sample ( given density= 0.795 grams/mL) Volume:24.6mL #of moles in sample:0.31825 moles…

A: • Here, we have to calculate the mass , molar mass and number of molecules of sample. •Given that,…

Q: Part B If you had excess aluminum, how many moles of aluminum chloride could be produced from 36.0 g…

A: The reaction taking place is  2 Al + 3 Cl2 -------> 2 AlCl3

Q: 2. If 0.0276 g of magnesium metal reacts with excess hydrochloric acid according to the equation…

A: Given, number of moles of magnesium metal for reaction =0.0276 moleswe are asked to calculate the…

Q: mass of sulfate - 0.2809 g mass of the sample - 0.4213 g Based on the mass of sulfate and mass of…

A:

Q: If your percent yield of copper was greater than 100%, what are three plausible errors you may have…

A: The percent yield in chemistry can be defined as the ratio of actual yield to the theoretical yield…

Q: In the gaseous state chlorine exists as a diatomic molecule Cl2 (molar mass=70.9g/mol). Calculate…

A: Given that in In the gaseous state chlorine exists as a diatomic molecule Cl2 (molar mass=70.9g/mol)…

Q: A residue of potassium chloride will be left in the "container" after the heating is completed. Do…

A: Here  we have told that a residue of potassium chloride will be left in the container after the…

Q: Why it's impossible to get a hundred percent yield from the original sample?

A: Here we are asked reason responsible for not getting hundred percent yield from the original sample.

Q: Calculate the mass percentage of oxygen in the organic molecule whose line structure is shown below.…

A: The formula of the above mentioned organic molecule is : C18H34O2

Q: How many molecules of ammonia

A: N2 +3 H2----------->2NH3 1 MOLECULE OF NITROGEN AND 3 MOLECULES OF HYDROGEN PRODUCE  2 NH3…

Q: Calculate the average molar mass of acetic acid based on your experimental results. Round your final…

A: Given: Concentration of acetic acid solution = 2.40 g/L   Trial-1 Trial-2 Initial buret reading…

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.