Answer:
43.2 g of table salt occupies 20.0 cm2of space- Appropriate for calculating density
150 g of iron density of iron 79.0 g/cm3- Appropriate for calculating volume
21.0 mL of methanol density of methanol 0.79g/mL - Appropriate for calculating mass
3.00 g of white pine, density of white pine 0.40 g/cm3- Appropriate for calculating volume
5.00 cm,3 of table salt weighs 10.8g-Appropriate for calculating density
Explanation:
Density is defined as mass per unit volume. Hence in science;
Density= mass/volume
When mass and volume are both given, the information can be used to determine the density of a given substance.
When volume and density are both given, the information can be used to determine the mass of a given substance.
When the mass and density of a substance are both given, the information can be used to determine the volume of the substance.
Hence the answers given above.
Answer:carbon, hydrogen and oxygen
Explanation:
Alcohol functional group is composed of carbon, hydrogen and oxygen
Answer:
Mass = 525.36 g
Explanation:
Given data:
Mass of CO₂ formed = ?
Mass of CH₄ burned = 191 g
Solution:
Chemical equation:
CH₄ + 2O₂ → CO₂ + 2H₂O
Number of moles of CH₄:
Number of moles = mass/molar mass
Number of moles = 191 g/ 16 g/mol
Number of moles = 11.94 mol
Now we will compare the moles of CH₄ and CO₂.
CH₄ : CO₂
1 : 1
11.94 : 11.94
Mass of CO₂:
Mass = number of moles × molar mass
Mass = 11.94 mol × 44 g/mol
Mass = 525.36 g
Answer:
C: It is the difference between the total kinetic and potential energy in a system
Explanation:
Potential energy is stored energy while kinetic energy is the energy of motion.... This is not the same as the object's total energy, which would be the sum of all forms of its energy, including thermal, chemical and so on. The type of potential energy stored in molecular bonds is a form of energy called chemical energy.
Hope this helps
The correct number of sig figs for this number is 7 because all whole numbers count and all zeros after the decimal counts too. So, all the numbers count, which is 7.