Why are the colored iron pills washed before they are ground up and weighed? So that they will be clean. ☐ Because it makes the pills too heavy to weigh. Because the colour of the coating will interfere with the endpoint. Because the red coating is indestructible and cannot be broken with a mortar and pestle.

Why are the colored iron pills washed before they are ground up and weighed? So that they will be clean. ☐ Because it makes the pills too heavy to weigh. Because the colour of the coating will interfere with the endpoint. Because the red coating is indestructible and cannot be broken with a mortar and pestle.

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter1: The Nature Of Chemistry

Section: Chapter Questions

Problem 103QRT

See similar textbooks

Similar questions

Which is NOT a means of chemical degradation of materials? attack by oxidation or reduction attack by hammering attack by acids attack by bases
Oxygen is not combustible. Is this considered a Chemical or Physical property and why?
what chemical test is used to distinguish the two? a. bromine b. molisch's test c. lucas d. sodium iodide
Porosity is a measure of the void or empty spaces in a material and is a fraction of the volume of voids over the total volume. The density of the solid material used to create 7 pieces of 0.97 cm diameter and 1.14 cm height cylindrical beads is determined to be 1.63 g/mL. These beads were then placed in a flask and was filled to the 40 mL mark with a salt solution. The total weight measured of the beads and the salt solution was 46.86 g. Upon further inspection, it was found that manufacturing defects caused the measured porosity of the beads to be at 32%. Assuming that the solution was able to fully fill the empty spaces inside the beads, calculate the density of the salt solution. Show your solutions in the next item Round your answer to 2 decimal places.
Classify each change as physical or chemical. A platinum ring becomes dull because of continued abrasion.
rosity is a measure of the void or empty spaces in a material and is a fraction of the volume of voids over the total volume. The density of the solid material used to create 7 pieces of 0.97 cm diameter and 1.14 cm height cylindrical beads is determined to be 1.63 g/mL. These beads were then placed in a flask and was filled to the 40 mL mark with a salt solution. The total weight measured of the beads and the salt solution was 46.86 g. Upon further inspection, it was found that manufacturing defects caused the measured porosity of the beads to be at 32%. Assuming that the solution was able to fully fill the empty spaces inside the beads, calculate the density of the salt solution. Show your solutions in the next item Round your answer to 2 decimal places. Question Porosity is a measure of the void or empty spaces in a material and is a fraction of the volume of voids over the total volume. The density of the solid material used to create 7 pieces of 0.97 cm diameter…
an empty evaporating dish weighs 25.1295 g. When unknown mixture is added, the dish and mixture weigh 29.9745 g. After removing the Fe with a magnet, the dish and remaining mixture weigh 28.2374 g. After extraction of the NaCl and drying the remaining solid, the dish and final mixture weigh 26. 8928 g. Calculate the mass and mass percent of Fe, NaCl, and SiO2 in the sample. Show all your work.
This reaction is an example of ‘green chemistry’. What makes it so?
A student places 1.520 grams of copper wire along with excess sulfur into a crucible (and cover), which weighs 18.030 g empty. The contents are heated mildly for five minutes to allow all the copper to react. The contents are then heated to glowing red heat for another five minutes to remove excess sulfur. The crucible and contents are cooled to room temperature. Calculate the total mass of the cooled crucible, cover, and contents.
Could we have used other materials instead of copper and zinc plates ? If so, list 2 other materials that we could use during this experiment
Explain how a geologist might use the flame test to identify a cation fromdifferent mineral specimens: calcite (calcium carbonate) versus cuprite (copper Ioxide). Are there precautions needed? What are they?
1 . WHAT ARE THE EQUATIONS FOR THE REACTIONS IN THE EXPERIMENT BELOW A. Test for Carbon and Hydrogena. Grind or cut paper, dried leaves, wood and cloth into small pieces and mix well with 1.5 grams of cupric oxide.b. Transfer the mixture to a dry test tube. Cover with a cork fitted with a glass tubing. Attach rubber tubing to the exposed end of the glass tubing. This is your first test tube.c. Clamp the first test tube on an iron stand in an inclined position and try to distribute the contents by gently tapping itd. Fill another test tube ¾ full of clear lime water. This is your second test tube.e. Immerse the end of the rubber tubing from the first test tube to the second test tube. f. Heat the test tube by holding the Bunsen burner in your hand starting from the middle of the tube going down to the closed end, distributing the heat throughout its contents.g. Stop heating when a significant change in the lime water is observed. No need to answer the items below this. They are just…