what is meant by "mass by difference" how do you do it?

Q: I need to know which is the mass of crucible and kid with magnesium please

A: A question based on analytical chemistry, which is to be accomplished.

Q: nd contains 12.4g of hydrogen. What is the percent by mass of hydrogen in the compound?

A: Given A 37.1 g sample of an unknown compound contains 12.4g of hydrogen. What is the percent by mass…

Q: Rank the following from least to greatest mass.cg, mg, Mg

A: The standard unit of mass in the metric system is the gram. Other units of mass are milligram,…

Q: 2.10x10^23 molecules of water contains how many grams of water?

A:

Q: 13. While cleaning your attic, you found your old rock collection. If 83.58% of the rocks have a…

A: Let us assume that we have to two objects with masses 'x' and 'y'. If we have to calculate the…

Q: e mass in kC

A:

Q: what happened to the mass of the substances as they burned?

A: The law of conservation of mass states that mass of the matter can neither be created nor be…

Q: carbon

A:

Q: A bottle of sodium hydroxide (NaOH) was found to contain 1.23 lb of this chemical. Express the…

A: The conversion factor can be described as the numerical factor that is used to convert one set of…

Q: If we allowed our soap to dry for 1 week the mass would change.  a. Will the mass increase or…

A: Density is a physical quantity that can be determined with the help of the mass and volume of the…

Q: Are 3 eggs the same quantity as 3 dozen eggs? O Yes O No

A: Given :  Are 3 eggs the same quantity as 3 dozen eggs?

Q: 4. Compare the total mass of the reactants with the total mass of the products: Total Mass of the…

A: Given reaction is,  K2CrO4 (aq) + Pb(NO3)2 (aq) →2KNO3 (aq) + PbCrO4 (s)

Q: how many mm3 are in 16.7 cm3?

A: We know,  1 cm3 = 1000 mm3  Given, 16.7 cm3

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

A: Given masses:

Q: What is the mass of phosphorus in a 45 kg person? .017 mass of P Incorrect

A: Determine mass of phosphorus in 45 Kg person?

Q: – 12 mg and an oil tanker has a mass of 3.0 x 10' kg. A virus has a mass of 9.0 x 1 Use this…

A:

Q: If you have 52% silicon dioxide in a 12.09 g sample, what mass of silicon dioxide do you have?   Am…

A: Given, Mass % = 52%  Mass of sample = 12.09 g  Mass of SiO2 = ?

Q: In the combustion reaction between propane and oxygen gas, if 44.0 g of propane is burned in 160.0g…

A: According to the rule of conservation of mass, the total mass of the reactant equals the entire mass…

Q: Gold (Au) has a density of 10.046 g/cm3. What is the mass in kg of 1.89 m3 of Au? ***Be sure to show…

A: given , density of gold = 10.046 g/cm3 volume of gold = 1.89 m3

Q: 13. While cleaning your attic, you found your old rock collection. If 83.58% of the rocks have a…

A: To find the average mass of rock collection we can use weighted average method.   In this method we…

Q: During a forest fire trees weighing thousands of kilograms are reduced to a few kilograms of ash.…

A: In the given question we have to explain the working of law of conservation of mass, Law of…

Q: While cleaning your attic, you found your old rock collection. If 83.58% of the rocks have a mass of…

A:

Q: (A true story.) While organizing the undergraduate stockroom, a new chemistry professor found a…

A: A question based on mass spectrum, which is to be accomplished.

Q: a chemist has 19.50g alcohol. what is the volume of the sample, what additional information is…

A: The volume of a given liquid is defined as the amount of the space occupied by the liquid that fully…

Q: Find the mass of 1 molecule of Li H in gram. a. 7.949 b. 1.32 x1023 С. 4 d. 1.32 x10-23

A:

Q: Identify the elements present in the following molecules(see Table 1.1).

A: (a) H2O Elements present : H and O.       (b) CH4 Elements present : C and H.

Q: A hydrated compound with a mass of 7.00g is heated. Its mass after heating is 5.63g. What is the…

A:

Q: e mass

A:

Q: What is the mass of 1 carbon atom in grams?  What is the mass of one dozen carbon atoms in grams?…

A: The number of moles can be calculated as- n=mMm=n×M where n: number of moles of the atom m: the mass…

Q: What is the mass % of carbon in dimethylsulfoxide (C2H6SO)

A: We have to calculate the mass % of carbon.

Q: Substance AB2 is 60% A by mass.  What is the percent A by mass for substance AB?  Justify your…

A: For given compound AB2, 60% by mass is A then obviously 40% is B. That is for 100g of given…

Q: How can mass and volume data for an unknown sample be used to identify the unknown?

A: Mass gives the quantitative aspect of the substance i.e., how much amount of the matter is contained…

Q: What is the mass in grams of 8.91 × 1016 chromium atoms? Put your answer in box in scientific…

A:

Q: Which mass is smaller: 5.0 mg or 5.0 mg?

A: While comparing, both the measurements should be of same units.

Q: The mass of a test tube and hydrate was 35.2755 grams. The mass of the empty test tube was 23.7726…

A: When a molecule contains the water molecules attached to it in a specified number, then the molecule…

Q: You have a sample of 1.204 × 1024 atoms of gold. How much does this sample weigh?

A: Given  number of atoms of gold = 1.204 * 1024 atoms To find weight of this sample. Required data -…

Q: m mass c

A:

Q: Rearrange these terms to solve for mass (m).

A:

Q: 1. What is the mass of the water used for this experiment?

A: To solve this problem we will use the mass of empty can and the mass of can and water .

Q: What is the difference between mass & weight? How is mass measured in laboratory?

A: Mass is defined as the amount or quantity of matter present in the body. It is measured in Kg or…

Q: In a 1.125E2 sample of iron(III) oxide, how many grams of iron are préšěnt? You? number of…

A: Given: The mass of iron (III) oxide = 1.125×102 g. The formula of iron (III) oxide = Fe2O3. The…

Q: An alien from the Planet X uses the units below for mass. How many zigs is 2.5 hums?  3 zigs = 1…

A: There are variety of units that are employed in measurement of mass. These smaller as well as larger…

Q: Was the Law of Conservation of mass followed? Explain.

A: Explanation

Q: Antoine Lavoisier found that mass was conserved in chemical reactions when he saw that

A: Otpion C is correct.

Q: Does the total mass of the reactants and the total mass of the products appear to be equal after…

A: Yes, the total mass of reactants before chemical reaction and total mass of products after chemical…

Q: what are five units that is used to measure mass?

A: There are SI and non-SI units for measuring mass

Q: what is the mass of 2i10xlo (19 unat is the mass of 2.10 x10 of copper, cu? atoms. Oilol 0.2229…

A: Given data contains, The number of copper atoms is 2.10×1021 atoms.

Q: Which statement is NOT true about mass?A. It has the same value everywhere on Earth.B. It is…

A: Mass is one of the fundamental quantities. It is defined as the measure of the amount of matter in a…

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.