which balance is more precise one that weight cg or one that weighs mg

Q: Which method should lead to greater precision? Which method actually is more precise? Explain

A: Method 1 relative average deviation is calculated as,

Q: Compare the objects and masses from Part III. Which measurement included the highest percent of…

A: Uncertainity in measurement is the result of imprecision in measuring instruments. They are prone to…

Q: What is the uncertainty of a measurement using a milligram balance?

A:

Q: 0.009 hm %3D cm 1.0023 dm = hm 0.2203 daL = µL %3D 515 cm = km

A:

Q: An electric current of 155.0 mA flows for 42.0 minutes. Calculate the amount of electric charge…

A:

Q: Rank the following quantities in order of decreasing mass.   Rank from highest to lowest mass. To…

A: Given masses:

Q: Calculate the solubility at 25 °C of Zn(OH)2 in pure water and in a 0.0170M ZnSO4 solution. You'll…

A:

Q: Penny sizes are the same before and after 1982. What can you say about the density of pennies before…

A: Penny sizes are the same before and after 1982, the density of pennies should have the same before…

Q: Why should the selected rule(s) be followed? A residue left on the balance will contaminate the…

A: The given statements are A residue left on the balance will contaminate the balance pan surface and…

Q: Percent Error is defined as: % = [measured value – accepted value] / measured value x 100

A: Percent error is used to get an idea about the possible error in the experiment based on the known…

Q: 8) The vessel to be weighed should be placed of the pan. (off to the side, or in the center) 9)…

A: 8. The vessel to be weighed should be placed in the center of the pan.  For proper weighing, vessel…

Q: One cubic meter 1 m³ of aluminum has a mass of 2.70×10³ kg.and 1 m³ of iron has a mass of 7.86×10³…

A:

Q: A specific gravity bottle weighs 35.40g. When it is filled with water, it weighs 85.93g. When it is…

A: Specific gravity of liquid is given by : mass of liquid / mass of water .

Q: Write the following metals using Roman numeral notation. Then, explain why the Roman numeral differs…

A:

Q: 4. Classify each substance by composition, first as mixture (MX) or a pure substance (PS): sugar…

A: Sugar = PS , C                  As it is compound made of carbon , hydrogen and oxygen. Granite =…

Q: Which of the following is not possible sources of error when weighing chemicals? Not waiting until…

A: To weigh the chemicals, analytical balance is used. The factors that influence the weight of a…

Q: Which of the following is a good practice in weighing solid samples? A Do not return the mass…

A: For accurate and pure weighing of solid samples Use weighing paper, a watch glass, a beaker, or some…

Q: Choose the letter of the correct answer.   1) Three students weigh a standard mass of 3.00 g on…

A: 1) By accuracy we understand that how close the result is to the actual value. And, precision…

Q: The theoretical density of metal is 2.70g/ cm cube. The experimental density a student found in the…

A: We have to calculate the percentage error.

Q: For each box, examine the blocks attached to the balances. Based on their positions and sizes,…

A: Density is calculated by two things – Density = MassVolumeDensity α MassDensity α1Volume

Q: Compare the objects and masses from Part III. Which measurement included the highest percent of…

A:

Q: Predict the major product for the following reactions. To preview image click here A A B B Na/NH3…

A: Alkyne undergoes partial reduction on treatment with sodium in liquid ammonia giving a trans alkene.…

Q: In an experiment a student used a 50 mL volumetric flask to prepare her copper solution but in…

A: step 1:  For making standard solutions, one must take care of the quantity that is to be taken…

Q: An infant ibuprofen suspension contains 100 mg per 5.0 mL suspension.  The recommended dose is 10 mg…

A:

Q: 10k gold is often used in jewelry (k=karat). Pure gold is 24k. What percentage of 10k gold is…

A: Gold purity analysisPure gold is 24k (k = karat)Purity of gold is a measure of amount of pure gold…

Q: Without using a calculator, decide which would give a significantly smaller value than 8.83 x 10-2,…

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Q: Complete the table below. I| mg 2 g dm 8 m 8 ks S 300 cL %3D II

A:

Q: Since 1965, dimes are composed of copper with 25% nickel on the outside. A Roosevelt Type dime (1946…

A: The objective of the question is to calculate the average mass of a 1963 dime based on the…

Q: 1. A student weighs an empty special round bottom flask and stopper. He finds the mass to be 56.972…

A: Volume(V) = 240.2 mLPressure(P) = 743 mmHgMass of empty flask and stopper = 56.972 gMass of flask,…

Q: 350 lbm/ft3= ? g/mL

A: pound/cubic foot (lbm/ft3) is a measure of density. 1 lbm/ft3 = 0.01602 g/mL

Q: An electric current of 21.50 A flows for 21.0 minutes. Calculate the amount of electric charge…

A:

Q: Explain why materials with very low density exhibit a greater degree of uncertainty in mass when…

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States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.