One molecule of chlorophyll contains 137 atoms. how many of these atoms come from the metal magnesium?

The acceleration due to gravity on Pluto is less than that on the Earth. The mass of a person on Pluto will be.

How many white eggs are there in 0.01 moles of white eggs

A scalpel made of surgical stainless steel is sterilized by heating in a flame and then quenching in 175 g of ethyl alcohol. The alcohol is initially room temperature, 23.7°C, warms to 38.6°C. The specific heat capacity of ethyl alcohol is 2.

The pressure of a sample of gas of constant volume is 2.0 atm at 30.ºC. What is the pressure of this sample at 20.ºC?

How can you make it clear that measured value of 980 in actually has 3 significant figures?

When magnesium combines with oxygen, the reaction involves a. a conversion of protons into electrons. b. sharing of electrons between Mg and O. c. transfer of electrons from Mg to O. d. transfer of electrons from O to Mg.

The activation energy for the reaction no2 (g) + co (g) ⟶no (g) + co2 (g) is ea = 100 kj/mol and the change in enthalpy for the reaction is δh = - 375 kj/mol.

What process transform solar energy into chemical energy?

When the reaction was carried out the calculated theoretical yield for water was 176 grams but the measured yield was 148 grams what is the percent yield

For an atom's electrons, how many energy sublevels are present in the principal energy level n = 4?