Molar mass

This is because the higher the molar of the sugar, the more water will escape from the potato strip in order to achieve equilibrium. The table below shows the percentage change of weight from before the experiment to after the experiment. Molar of sugar Before experiment (g) % change in weight from before exp. To after exp. After experiment (g) 0.0 5.84 14.21 to 2 d.p 6.67 0.2 6.05 8

used to determine the percent composition of the sulfate in the original unknown sulfate salt. The experiment performed was required for gravimetric analysis of sulfate to find the mass percent of sulfate in the original unknown sample. Without gravimetric analysis, it would be much more difficult to determine the mass composition of sulfate ions in the unknown sample.  The ending result showed that the percent composition of sulfate in the unknown salt was approximately between 23.65% and 29.55%

the mass percent of oxygen in the compound potassium chlorate (KClO3) via the thermal decomposition of a sample of potassium chlorate. b) To qualitatively demonstrate that the residue resulting from the decomposition of potassium chlorate is potassium chloride. Background All compounds consist of elements chemically combined in fixed proportions – they obey the Law of Constant Composition. One way to express the proportion each of element in a compound is as a percentage by mass, or mass percent

in a crucible for ten minute periods and weighed between periods until three concordant results were gathered. Aim To determine the mass/percentage of water within the magnesium sulphate sample. Hypothesis

Molar Volume Lab Report  Objective: To find the molar volume of hydrogen gas at STP. Materials: Mg ribbon, thermometer, barometer, 6M HCL, eudiometer(Acid), 50 ml beaker, 400 ml beaker, cotton thread, base #7, pipet, ring stand, buret clamp, funnel, cork(hole through center vertically), cylinder full of water Procedure: The eudiometers was clamped onto the buret clamp on the ring stand. The mass of the Mg ribbon was recorded and was the bent to form a circle. A 15.0 cm long cotton thread was then

aquatic life. Its IUPAC name is N-phenylacetamide. The synthesis below, depicts aniline reacting with acetic anhydride yielding acetanilide and acetic acid (amine to amide). Solubility in H20 25 ° C Solubility in water 75 ° Molar mass g/mol Mass (g) Density g/ml # of moles M.P Acetic Anhydride .12 g/mL 102.09 1.08 Aniline .036 g/mL 93.12 .31 1.02 .00333 Acetanilide <.0056 g/mL 135.16 .41 1.22 .00303 114.3 Safety Hazards Acetic Anhydride Irritant (eyes/skin). Toxic by inhalation

After these little tests, we would look at the substance?s physical and chemical properties whilst documenting them. The most important thing we wanted to take away from this lab was what the chemical formula consists of as well as the changes of mass through the chemical?s various tests. Theoretical Background: || Jordan The formula weight of a substance is merely the sum of the atomic weights of all atoms in its chemical formula. For example, nitric acid, HNO3, has

both found by comparing the reaction and the experimental yield and recording those results. Introduction When it comes to chemistry, compounds will always more than one elements. These elements will always have a mixture of a certain proportion by mass for a given compound. When dealing with compounds it is important to find the empirical formula because it helps to show all the known elements of that compound and they display the smallest whole number of moles and the number of atoms each element

Item Mass (g) Crucible & Lid 16.96g Mystery Hydrate Crystals 4.40g Crucible & Lid & Mystery Hydrate Crystals after 1st Heating 19.17g Crucible & Lid & Mystery Hydrate Crystals after 2nd Heating 19.17g Interprets and analyzes data Calculations Molar Mass MgSO4 Atomic mass of Mg + Atomic mass of S + Atomic mass of O * 4 = Molar mass of MgSO4 24.31u + 32.07u + 64.00u = 120.38u MgSO4 · 5H2O Molar mass of MgSO4 + Atomic mass of H * 10 + Atomic mass of O * 5 = Molar mass of MgSO4

force sensors properly. Observe the directional relationship between force pairs. Observe the time variation of force pairs. We need to explain Newton’s third law in simple language. Materials: LabPro Interface Two Vernier force sensors .5kg mass String Rubber band DataMate Program Preliminary: 1. The force of the window on the bug because the bug is just flying, but the force of the window at a given speed is much greater creating the force to splatter the bug. 2. Yes, my right