Which of the following statements is/are example(s) of something that could be explained using chemistry? Select all that applying
The ripening of an apple ripens other apples.
Venus is the only planet that spins in the opposite direction to Earth.
A 200-pound person would only weigh 76 pounds on Mars,
A piece of cut potato turns brown when left out on the cutting board.

the first and fourth

Explanation:

Ripening and rotting can be explained as chemical changes in chemistry. The other two answers are physics-related. Venus rotates in an opposite direction because it has like forces with mercury, so it repels it, causing it to turn away. This is electromagnetic force, something definitely not directly related to chemistry. The 200-pound person problem has to do with weight, mass, and gravitational force, which is mainly in physics.

hey there!

boiling point is the temperature at which the vapor pressure of the liquid equals atmospheric pressure. the vapor pressure of solvent molecules is decreased when a solute is added, so a higher temperature is required to increase the number of solvent molecules in the gas phase above the liquid.

at the freezing point, the vapor pressures of the solid and liquid are equal; a lower temperature is needed to reduce the number of solvent particles above the liquid.

hope this you

tobey

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"