Answer:
c) 1.55 ×10⁻² moles
Explanation:
Given data:
Number of moles of sodium = ?
Number of atoms = 9.34 ×10²¹ atoms
Solution:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
For example,
18 g of water = 1 mole = 6.022 × 10²³ molecules of water
1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen
Moles of sodium atoms:
1 mole contain 6.022× 10²³ atoms
9.34 ×10²¹ atoms × 1 mol / 6.022× 10²³ atoms
1.55 ×10⁻² moles
I'm guessing it will be B its the only one that fits with that sentence
Answer:
The density of gold is 19. 38
Explanation:
Density is defined as the property that matter, whether solid, liquid or gas, has to compress in a given space. In other words, density is a quantity that allows you to measure the amount of mass in a given volume of a substance. So, the expression for the calculation of the density is the quotient between the mass of a body and the volume it occupies:
Density, according to the International System of Units, is usually expressed in kilogram per cubic meter (kg/m³) or gram per cubic centimeter (g/cm³). Although it can also be expressed in any other unit of mass by volume.
In this case:
- mass= 96.9 grams
- volume= 5 mL
Replacing:
density=19. 38
The density of gold is 19. 38 , that you could approximate the option 19. 32
I would go to cape coral to play basketball!
1. Wait to see if it is all clear and then go
2. Yield to those coming towards you and once it is totally clear then go.
3. Means you are able to go once you yield to oncoming traffic.
4. I don't remember.
5. Well honestly all the signs here are green so! but I would look to see if it says what restraunts there are or gas stations.
6. IDK