Table of Contents
- 1 Which sample represents the greatest number of moles?
- 2 What is the total number of oxygen atoms in the formula mgso4 7 H2O The represents seven units of H2O attached to one unit of mgso4?
- 3 Which of the following represents largest number of particle?
- 4 What elements has the largest atomic mass?
- 5 How many total atoms are in MgSO4?
- 6 How many atoms are present in 1 ml of ammonia at STP?
- 7 How is the volume of a gas related to its kinetic energy?
Which sample represents the greatest number of moles?
Helium has the most number of mol out of all the options and will thus have the highest number of atoms. Look up the atomic weight (in grams per mole) of each of these 5 elements, and divide the given mass of the element by its atomic weight.
What has the greatest molecular mass?
The answer choice with the largest atomic molar mass is (b) lead. Molar mass is defined as the mass of one mole of an element or compound.
What is the total number of oxygen atoms in the formula mgso4 7 H2O The represents seven units of H2O attached to one unit of mgso4?
11 oxygen atoms
There is a total of 4+7=11 oxygen atoms.
What is the total number of moles of oxygen atoms in 1 mole of Fe₂ So₄ ₃?
12 moles
1 mole of ferric sulfate contains 2 moles of iron, and 12 moles of oxygen atoms, and three moles of sulfate ions.
Which of the following represents largest number of particle?
thus the number of atoms of 1 mole of CH4 is greatest among them..
Which contains the largest number of molecules?
water
As we can see that, water has the highest value for the number of moles in respect to other compounds. So, the largest number of molecules are present in water.
What elements has the largest atomic mass?
Oganesson has the highest atomic number and highest atomic mass of all known elements. The radioactive oganesson atom is very unstable, and since 2005, only five (possibly six) atoms of the isotope oganesson-294 have been detected.
Which compound has the greatest percent composition by mass of sulfur?
Highlight to reveal answers and explanations
| Questions | Answer | Explanations |
|---|---|---|
| 11 Which compound has the greatest percent composition by mass of sulfur? (1) BaS (3) MgS (2) CaS (4) SrS | 3 | See Link |
How many total atoms are in MgSO4?
The chemical formula for magnesium sulfate is MgSO4. A magnesium sulfate molecule is composed of a magnesium atom, a sulfur atom, and four oxygen atoms.
How many moles of oxygen are in MgSO4?
From the formula, we see that there are 11 moles of oxygen (4 in the magnesium sulfate part plus 7 in the hydrate) per mole of MgSO4. 7H2O.
How many atoms are present in 1 ml of ammonia at STP?
So 1 ml has 1/22400 moles at STP. 1 mole = 6.022 x 1023 molecules. So number of molecules of ammonia in 1 ml = 6.022 x 1023/22400. Now, multiply this number by 4 to get the total number of atoms as each molecule of ammonia has 4 atoms ( 1 N and 3 H).
How many liters does a sample of oxygen occupy?
A sample of oxygen occupies 47.2 liters under a pressure of 1240 torr at 25oC. What volume would it occupy at 25oC if the pressure were decreased to 730 torr? (a) 27.8 L (b) 29.3 L (c) 32.3 L (d) 47.8 L (e) 80.2 L 3. A sample of nitrogen occupies 5.50 liters under a pressure of 900 torr at 25oC.
(b) The actual volume of the gas molecules themselves is very small compared to the volume occupied by the gas at ordinary temperatures and pressures. (c) The average kinetic energies of different gases are different at the same temperature.
How many water molecules are produced when methane reacts with oxygen?
(a) Every methane molecule that reacts produces two water molecules. (b) If 32.0 g of oxygen reacts with excess methane, the maximum amount of carbon dioxide produced will be 22.0 g.