En 200 gramos de carburo de potasio ,cuya fórmula química es K4C , Cuántos moles de esa sustancia existen ? A) 1.19
b)0.84
C)3.92

¿Cual es la masa molar de ácido crítico cuya fórmula es C6H8O7

A)138
B)180
C)192
D)150

alguien me puede ayudar es para hoy ☹️​

Which of the following statements is false regarding aromaticity? a. the compound must be cyclic b. the compound must be fully conjugated c. the compound must be planar d. the number of electrons in the pi system must satisfy the hückel 4n+2 rule e. the compound must have a neutral charge

(apex) when a cup of water is dropped, as the cup falls, the water in the cup falls out true or false?

3. how much energy in joules is required to evaporate .0005 kg of liquid ammonia to vapor at the same temperature? 4. how much energy ( in megajoules ) is given up by .75 kg of water at 0c when it freezes to form ice at 0c? 5. explain how heat works between and at critical temperatures?