MCQ 25: 1.67*10-27kg is the weight of a single atom of A. oxygen B. nitrogen C. hydrogen D. water

Q: A 23.6 g sample of CaSO, is found to contain 6.95 g of Ca and 11.1 g of O. Find the mass of sulfur…

A: To find mass of sulfur, first find out mass of S in 23.6g sample. Then use the relation to calculate…

Q: w hydrogen atoms

A:

Q: By definition, all atoms of carbon have exactly 6 _________, but the number of _________ varies from…

A: Carbon is an element in periodic table. It has the atomic number of 6. Carbon is a nonmetal with…

Q: Difference between Rutherford nuclear model and daltons plum pudding model

A: Rutherford model shows that an atom is mostly empty space i.e. with electrons orbiting a fixed,…

Q: The radioactive element carbon 14 has a 1/2 life of 5750 years a scientist determined that the bones…

A: let assume the initial concentration of C-14 as Co=100%

Q: Mention the main characteristics of the carbon family

A: Carbon family belong to 14 group Carbon family elements have variable physical and chemical…

Q: 4. What do you understand I A. lodine number,

A: ANSWER IS

Q: Explain your answer. 1. Who is sir john joseph dalton? 2. What elements were formed during and after…

A: Supernova: It is breaking or explosion of star which include a lot of energy and light during the…

Q: A 49.8 g sample of water (H2O) contains 5.57 g of hydrogen. What mass of oxygen is contained within…

A: Solution:- 2H2O -> 2H2 + O2       Given data:- 49.8 g sample of water contains 5.57 g of…

Q: Activity type of Alumina (meaning of type I, II, III, etc.) what do the numbers mean?

A: Alumina is a granular and extremely porous form of aluminum oxide. It is available in basic, acidic…

Q: how is mass spectrometry important in biology?

A: In this question we will answer how mass spectrometry is important in biology. How it is useful, its…

Q: The correct name for VS is:

A: First the name of cation and then name of anion is given.

Q: What is the plum pudding model and what did it discover?

A: Interpretation :  We have to tell what is plum pudding model and about its discovery.

Q: mass number for the chromium isotope with 29 neutrons Express your answer as an integer.

A: Naturally occurring chromium consists of the following four isotopes: 50Cr, 52Cr, 53Cr and 54Cr. The…

Q: atomic mass for capsaicin (C18H27NO3)

A: The mass of the 1/12 of  a single carbon- 12 atom is known as atomic mass .

Q: How to get atomic mass protons electrons and neutrons? How do cation and anion work?

A: Atom consist of a heavy mass in the center which is known as nucleus. Nucleus contains protons and…

Q: Vi-50 has a mass of 49.9472 amu and Vi-51 has a mass of 50.9440 with an average mass of 50.9415 amu.…

A: Consider the abundance of Vi-50 is X% and the abundance of Vi-51 is (100-X) %. The average atomic…

Q: A- Determine the mass of nucleons and electron by atomic mass unit?

A: mass of 1  electron = 5.45e-4 amu, mass of proton = 1 amu and mass of neutron = 1.     Now, nucleons…

Q: Antimony (Sb), has two naturally occurring isotopes: Sb-121 that has a percent abundance of 57.30 %…

A: Given: Antimony (Sb) has two isotopes Sb-121 and Sb-123 Mass of Sb-121 =120.90 amu Percentage…

Q: A sample of alumminum foil contains 7.5*1023 atoms. What is the mass of the foil?

A: Given : Number of aluminium atoms in the foil = 7.5 X 1023

Q: how to find the amount of neutrons in moles within a sample of silicon-30 and having a mass of 68.7

A: Given the atomic mass of silicon is 30 g/mol and the mass of sample is given as 68.7 g. Thus, the…

Q: 4. 252O32- (aq) + I2 (aq) -> S4O62- (aq) + 21- (aq)

A: A reaction in which oxidation and reduction takes place simultaneously is called a redox reaction

Q: What is the Law of Multiple of Proportions?

A: Law of Multiple Proportions ----- When two elements react to form two or more compounds, than the…

Q: Determine the missing element -3516S----à -10e + ?

A: Balanced nuclear equation is the equation in which the sum of subscripts as well as sum of…

Q: of Protons and Neutrons ir

A:

Q: Antimony (Sb), has two naturally occurring isotopes: Sb-121 that has a percent abundance of 57.30 %…

A:

Q: Chemical for 3. How many times larger is the volume of the atom than the volume of the CaCl₂…

A: An atom consists of positively charged nucleus at its centre where the size of the nucleus is very…

Q: nat mass of

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: The natural isotopes of sulfur and their molar masses and mass fractions are respectively 2210S:…

A:

Q: In Rutherford experiment what was the unexpected result

A:

Q: If element X has an atomic mass of 37.45 amu and is composed of x-38 and x-35, find the percent x-38…

A: Concept introduction: Mass of an element is the actual amount of substance is present in it and mass…

Q: Chemi how m atom A. 16 B. 20 C. 17 D. 19 E. 35

A:

Q: If you break apart an ________ of an element like carbon, it’s not carbon anymore.

A: The smallest unit of matter is called the atom.

Q: Why is carbon said to be unique?

A: The reason for unique nature of carbon has to be given.

Q: Ca is 42 Mass =

A:

Q: A sample of aluminum foil contains 8.00×10238.00×1023 atoms. What is the mass of the foil?

A:

Q: Summarize the history of the atomic idea?

A: Greek philosophers. Leucippus and Democritus put forward the idea of atoms as far back as the fifth…

Q: I thought my answer was correct, but it wasn't.

A: 1 mole of any substance contains 6.022 x 1023 atoms or molecules or particles. Here 6.022 x 1023 is…

Q: mass number for the hafnium isotope with 106 neutrons Express your answer as an integer.

A: An atom basically consists of proton, neutrons and electrons. The protons and neutrons are present…

Q: Mickel (T)Sahe+ Ptassium Hidenide ?

A: Complete the following reaction

Q: ne average atomic mass

A:

Q: What are Dalton’s Theories? Which ones have been disproven and which ones are still true?

A: Dalton’ theory defined the atoms as the maker of every matter present around us.

Q: g Use the average atomic masses to calcalate He aumbarof omoles of He elemen't pesscnt in leveh…

A: Moles = weight / atomic weight   And you have done mistake in c part also . Please correct.

Q: Name the following compounds! a) b) c) d)

A: Since you have asked a question with  multiple sub-parts, we will solve  first three sub-parts for…

Q: What is the mass of theis example explain

A: Explainination :      In mass spectroscopy, neutral organic molecule (M) in the vapour or gaseous…

Q: In Rutherford’s gold foil experiment, which particle(s) were used? Group of answer choices α-rays…

A: Alpha rays (radiation) is the emission of an alpha particle (helium nuclei). Beta rays (radiation)…

Q: Sample of zinc contains 2,5 moles of zinc atoms. The mass of the zinc sample is.. a. 164,575g b.…

A:

Q: Case #1 Case #2 Jinkies! The Moaning Lisa has been stolen from the Haunted Museum! The crime scene…

A:

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.