7. If 0.0250 mol of element has a mass of 1.742 what is the average mass...
the mass of 1.250 mol of an element is 88.64g. what is the
element
, Ch6, and Ch 7 for Exam 3-20 extra credits lonecia Stevenson: Attempt 1 Previous Page Next Page Page Question 1 (1 point) The mass of 1.250 mol of an element is 88.64 g. What is the element? Ge Osr OBr2 Cl2 O Ga Page Next Page Previous Page Submit Quiz 0 of 30 questions saved DOLL
Question 4 2 pts What is the average atomic mass of the element that has the following isotopes? 0.005% is of mass 234.040947 amu 0.720% is of mass 235.043924 amu 99.275% is of mass 238.050784 amu Once you find the average atomic mass, please find which element on the periodic table has that mass. Type the atomic symbol (one or two letters only, starting with a capital letter) here. Thank you.
What would be for the mol reacted,, mol NH4X in sample, and yhr
average molar mass?
CALCULATIONS A. NaOH Preparation: Approximate molarity of NaOH 0.48 M B. NaOH Standardization: Trial # Mass of KHP E 1.7249 1.9569 1.8799 Volume of NaOH 18.58 L 20.58mLihat 19.71 mL Molarity of NaOH 0.4544 M 0.4654M 0. 3 M 0.4668M Average molarity of NaOH: 0.4668 M 0.4622 M C. Molar Mass of NH X Salt 1. Volume of NaOH 0.025 0.025 0.025L 2. Molarity...
The mass of 3.3 mol of an element is 507.5 g. What of the following is the element? A) I2 B) F2 C) H2 D) N2 E) O2
A fictitious element Z has an average atomic mass of 223.16 u. Element Z has two naturally occuring isotopes. The more abundant isotope has an exact mass of 224.45 u and a relative abundance of 65.25 % . Calculate the exact mass of the second isotope.
What is atomic number of an unknown element whose atomic mass and formal charge are (40g/mol) and (-3) respectively? (The unknown element atom has 24 electrons.) Then how many neutrons does the element atom have?
A fictional element has two isotopes and a molar mass of 82.55 g/mol. The first isotope has an atomic mass of 81.01 u and 24.56 % of the element's atoms are this isotope. What is the atomic mass (in u) of the second isotope?
Compound X has a molar mass of 180.16 g-mol and the following composition: element mass % carbon 40.00% hydrogen 6.71% oxygen 53.29% Write the molecular formula of X. Х ?
What is the molecular mass of sulfuric acid, H2SO4 ? Symbol S Element Sulfur Oxygen Hydrogen Atomic Mass (kg/mole) 0.0321 0.0160 0.00101 (Unit = kg/mol)
-1 Compound X has a molar mass of 86.09 g-mol and the following composition: element mass % carbon 55.81% hydrogen 7.02% oxygen 37.17% Write the molecular formula of X. 5 ?