What came first? protons neutral Atoms or nuclei? which came second?

Q: w hydrogen atoms

A:

Q: The mass percent of oxygen in CaO is?

A: The compound given is CaO Assuming 1 mole of CaO

Q: Help me with understanding how to calulate mass for A1 and A2

A: Molarity = mole of solute(mol)volume of solution (L)Mass of compound = moles × molar mass1mL =…

Q: What is the mass, in grams, of 557 copper atoms?

A: Given, number of atoms of copper =557 we are asked to calculate the mass (in grams) of 557 copper…

Q: Can I have at least two reason why. The mass of the mgo formed could be higher than expected

A: To find: Why the mass of MgO formed could be higher than the expected.

Q: radidactive research, particulary in studies mass (in mg) oudsoud g of Na, 32PO, after 40.0 days?…

A: Radioactive decay follow first order kinectics. Half life = 14.3 days

Q: Gold (Au) is one of a group of metals calledthe coinage metals (copper, silver, and gold). How many…

A: Solution :      Avogadro's number is defined as the number of particles present in one mole of the…

Q: Calculate the % by mass C in C4H8O

A: % by mass of C in C4H8O = (mass of C/mass of C4H8O) × 100%

Q: One atom of an unknown element has a mass of6.66 × 1 0 -23 g. What is the identity of this element?

A: Molar mass is the mass of Avogadro's number (6.022×1023) atoms.

Q: What is the mass of 1.213 × 10^8 mol S?

A: Mass = 3.88× 109 grams

Q: The radius of a tungsten atom is 137 pm. How many tungsten atoms would have to be laid side by side…

A: According to the unit conversion, 1 mm is equal to 1×109 pm. The diameter of tungsten is 274 pm.…

Q: What is the mass of 1.6x10^21 argon atoms?

A: Molar mass of Argon is 39.95 g/mol i.e 1 mole of argon = 39.95 g of Argon Number of atoms of Argon…

Q: A sample of Al weighs 52.0 grams. Will a sample of Hg that contains the same number of atoms weigh…

A:

Q: Heading 1 + BIUA Go D Russo One 30 Element: Ytterbium Number of Number of Neutrons Name of isotope…

A: Fill in the blanks and calculate average atomic mass of given isotope ?

Q: Signature of a person increased the mass of paper by 1.2 grams with lead pencil. How many atoms of…

A: Given that Mass of C=1.2gram Molar mass of C=12g/mol No. of atoms of C=?

Q: The Cullinan diamond was the largest natural diamond ever found (January 25, 1905). It weighed 3104…

A:

Q: How many atoms does hydrogen have

A: Calculate no. of  atom in hydrogen=?

Q: what has more atoms.....  a gram of Cesium or a gram of Hydrogen.  Not sure how to figure it out and…

A: The number of atoms in one gram of cesium is:

Q: What is the average atomic mass of element X if it exists as 19.90% with a mass of 10.7 and 80.10%…

A:

Q: If 17.28 g of a pure element contains 8.545×1022 atoms, what is the element? The element is: (Enter…

A: The mass of the element that contains 6.023 × 1023 atoms is called as the molar mass of the element.…

Q: Element Kittypurrium (named after one of TA's cats) has two isotopes: Isotope 1 has an atomic…

A: Percent of isotop 1 = 91.162%   Atomic weight of isotop 1 = 40.005 g/mol  Percent of isotop 2 =…

Q: Suppose that a person counts out gold atoms at the rate of one each second for the entire span of an…

A:

Q: Q find out mass 0 amam

A: Molality of the solution is equal to the number of moles of solute dissolved in one kilogram of…

Q: How many atoms of gold are in 1 gram of gold?

A: Given, 1 gram of gold

Q: I want to know at least some reason why the mass of the Mgo formed could be lower that expected

A: Interpretation -  To tell about a reason why the mass of the MgO formed could be lower that expected…

Q: 2) How is the mole similar to a dozen?

A: (2) Answer- A mole is a unit of counting particles such as atoms, molecules, ions etc. which…

Q: SISAI s performed three tim dents for the mass of 361g, and 0.2341g. T mass of silver is 0.52

A: Gravimetric analysis  quantitative  chemical analysis and steps involved in this method is  1.…

Q: What is the atomic weight of the element chlorine?

A: Average atomic weight of chlorine element is 35.5 amu. Chlorine atom has two isotopes Cl35 and Cl37…

Q: Suppose a piece of silver jewelry contains 6.23x1022 atoms of silver (Ag). Part A How many dozens of…

A:

Q: A sample of a compound synthesized and purified in thelaboratory contains 25.0 g hafnium and 31.5 g…

A: GIVEN: Mass of Hafnium = 25.0 g Mass of tellurium=  31.5 g Mass of Hafnium present in the sample…

Q: True or False: A mass spectrum is normally considereda specific means for identifying a chemical…

A: Mass spectrometry is one of the important analytical technique used in organic chemistry. In this…

Q: A gold ring contains 3.01 x 1023 atoms of gold, Au. How many grams of gold are in the ring?

A: The number of moles (n) of a substance is calculated by dividing its number of atoms (No) by…

Q: In a mass spectrometry experiment, the instrument senses the of particles traveling from the…

A: We have to predict the correct option for particles .

Q: 41) A teenage child in Wisconsin throws a chunk of sodium metal into a lake consisting of freshwater…

A: Given: mass of sodium = atomic number of fluorine = 9 kg = 9000 g density of water = 1.01 g/mL…

Q: how many atoms at there in 63.55 grams of copper?

A:

Q: What is the mass number of Hg from the periodic table?

A: Answer:- Mass number:- It is defined as the total number of proton and neutron or can be defined as…

Q: Fusion is cool, small things come together and make bigger things. For example, if two carbon-12's…

A: Atomic No. of carbon is :- 6 Mass of C-12 carbon is :- 12 Atomic no. Silicone is :- 14 Mass  of…

Q: a rain drop has a mass of 50mg and the entire pacific ocean has a mass of 7.08e20kg. What is the…

A: The mass of the rain drop is 50 mg = 0.05 g. The mass of entire Pacific Ocean is 7.08 × 1020 Kg.

Q: Point out which isotopes the following mass spectrum indicates,   hint: the possible presence of…

A: Note: M:M+2 (3:1). Therefore chlorine is present. Therefore the compound is 4-chloro-1-butene.

Q: Does one mole of Mg and one mole Ge have the same mass or a different mass? Explain your answer.

A:

Q: Calculate the mass

A: At NTP, temperature T1 = 293.15 K Volume, V1 = 24.04 L Temperature, T2 = 30 ◦C or 303.15 K Volume,…

Q: 16. While cleaning your attic, you find your old mass of 11.3 collection? and the rest of mass of 82…

A:

Q: How many atoms of carbon are th

A:

Q: & The other form of isotope notation is known a Add Text Here

A: Please find your solution below : The other form of isotope notation is known as nuclear notation.

Q: 49.4 g of Cr represents how many atoms?

A: Number of atoms = moles of Atoms X Avogadro's number where Avogadro's number = 6.022 X 1023  And…

Q: The density of helium in a ballon is 1.18g/L. If a balloon holds 2.81L of He, how many atoms of He…

A: Given : density of helium = 1.18 g/L volume of helium = 2.81 L

Q: How many copper atoms are in a pure copper statue with a mass of 105kg?

A: The value is given as follows:

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.