toms are there in 400.5 grams of Silicon? A V-M. G a. b. 6.77 X 1027 atoms 8.58 X 1024 atoms С. 1.500 X 10-23 atoms d. 1.810 X 1024 atoms

Q: 16.The atomic masses of * Cl (75.53 percent) and "Cl (24.47 percent) are 34.968 and 36. 956 a.m.u.,…

A: Introduction: Chlorine belongs to group 17 elements with atomic number 17 and mass 35.45 amu. Group…

Q: 28. How many moles of atoms are there in each of the following? a. 40.1 g Ca b. 11.5 g Na c. 5.87 g…

A:

Q: Element X reacts with chlorine to form a compound with the formula of X2Cl3. This compound contains…

A: Relative atomic mass: Cl = 35.5 g/mol

Q: As in the equation below: 2HC aq) MgCl2(aq) + H2(a) -> The volume of hydrogen gas collected over…

A: It's a multiple question type.   Given information, 1) Temperature (T) = 45°C = 45 + 273.15 K =…

Q: 4. Copper is found in nature as two isotopes, 63Cu (69.0%) with a mass of 62.93 amu and 65Cu (31.0%)…

A: Average atomic mass of copper can be determined using the following equation.

Q: ne number of atoms

A:

Q: A compound was analyzed and the following results were obtained: • Molar mass: 270.4 g/mole • Mass…

A: The chemical formula of an unknown compound is determined by the percent by mass of the elements…

Q: A sample of CH 2F 2 with a mass of 19 g contains atoms of F. 38 в) 3.3х 1024 c) 2.2 x 1023 D) 9.5 E…

A:

Q: Does each chemical formula represent an element or a compound? a. H 2 b. H 2O 2 c. S 8 d. Na 2CO 3…

A: An element is made up of same type of atom whereas a compound is made up of more than 1 type of…

Q: Which of the following samples of gases contains the greatest number of atoms? (Relative atomic…

A: 4th option is correct that is 13.0 g of C2H6

Q: A sample of cyanic acid, HCN, contains  3.33 x 1022 atoms. a. How many moles of cyanic acid are in…

A:

Q: How many atoms are in 1.50 moles of helium (He)?   a 2.50 x 1022 atoms He  b 9.03 x 1023 He atoms…

A:

Q: An element consists of two isotopes and has an average atomic weight of 85.561 a.m.u. The abundance…

A:

Q: How many grams of platinum (Pt) contain the same number of atoms as 5.0 g of lithium (Li)? О а. 0.18…

A: Given, Mass of lithium (Li) = 5.0 g Mass (in grams) of platinum (Pt) contain the same number of…

Q: What element has 7.767 x 1017 atoms in 6.57 x 10-5 g of material?   Group of answer choices A.…

A: Given data is: Mass of material = 6.57×10-5 g Determine the element having 7.767 x 1017 atoms in…

Q: A sample of cyanic acid, HCN, contains  3.33 x 1022 atoms. a. How many moles of cyanic acid are in…

A: Given : Total number of atoms of HCN = 3.33 X 1022 atoms.

Q: 1. Calculate the formula mass of (NH4)3ASO4. A. 417.80 amu B. 193.05 amu C. 165.02 amu D. 156.96 amu…

A: 1. Formula mass of a compound is the sum of the masses of all the atoms present in the compound.

Q: . What is the mass, in grams, of each of the following? a. 2.3*10^-3 mol Sb b. 3.59*10^-2 mol Ba…

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

Q: 4. An element “X* has five major isotopes, which are listed below along with their abundances. What…

A: We are having an element X having five isotope along with their abundance and mass . We have to…

Q: There are 1.5 x 1022 atoms in A. 0.025 mol of gold B. 4.0 g of helium C. 2.5 x 1044 moles of copper…

A: Number of atoms = moles of element X Avogadro's number  where Avogadro's number = 6.022 X 1023

Q: How many gold (Au) atoms are there in a 10. g sample of that is 50% Au by mass?  a. 6.2 x 1022 b.…

A:

Q: 4. Copper is found in nature as two isotopes, 63Cu (69.0%) with a mass of 62.93 amu and 65Cu (31.0%)…

A: The average atomic mass of two isotopes can be calculated using the following expression:

Q: 22. What is the mass in grams of each of the following? a. 3.011 × 10²⁹ atoms F b. 1.50 x 1023 atoms…

A:

Q: Vhich sample contains the fewest atoms? O a. 225 g C O b.50 g Xe O C. 125 g Fe O d. 25 g Ca O e. 50…

A:

Q: CI has two isotopes; 17CI in 10 % , 18CI in 70%. and 15CI in 20%. The average atomic mass of Cl…

A: In this question, we want to determine the average atomic mass of Cl atom. You can see details…

Q: What is the mass of magnesium fluoride that contains 7.29 × 1024 F atoms?   Relative atomic…

A: Given,  The mass of magnesium fluoride that contains 7.29 × 1024 F atoms is:

Q: Which of the following statements is TRUE? An atonmic 24

A: First statement is wrong, because atomic mass unit (amu) is mass of 1/12 th mass of one 12 C atom.…

Q: sample of aluminum contains 2.91 × 1022 atoms of aluminum. What is the mass of this sample?  [Molar…

A: Given that: Molecules of Al = 2.91×1022 atoms  Molar mass of Al = 26.98 g/mol  1 mol = 6.023×1023…

Q: 15. How many atoms are in a sample of 10.0 grams of silver? a. b. 5.58 x 1022 atoms 3.06 x 1022…

A: mole is equal to weight of substance divide by it's molar mass

Q: 6 What is the mass of 2.0 billion billion atoms of gold? (1 billion is 1 x 10^9, so a billion…

A:

Q: Classify each element as atomic or molecular.a. neon b. fluorine c. potassium d. nitrogen

A: a. The elements that have single atoms as their naturally existing basic units are known as atomic…

Q: 107Ag Two naturally occurring isotopes of silver are (relative abundance 52.00%) and 109Ag (relative…

A: Isotopes are those atoms of an element that have same atomic number but different mass number.  Mass…

Q: 2. Add a neutron to the Carbon-12 nucleus. Observe how the mass number changes. Which particle(s)…

A: Atomic number of an atom = number of protons  For a neutral atom :-  No.of protons = number of…

Q: 5. Helium on the Moon was found to be 0.520% 2He, 8.25% ³He, and 91.23% 4He. What is the average…

A: average atomic mass = ∑(mass of its isotope× natural abundance )

Q: b. 7 14 c. Lead 206 d. 31 26 84 36 Kr е.

A: Since you have posted multiple questions, the answer for first question is given below. Kindly…

Mass Spectrometry

This process is an instrumental method in which a sample is changed to fast moving positive ions by electron bombardment. The charged particles vary due to their different mass to charge ratio and are estimated with the help of this difference. It is also called mass spectroscopy.