1. Considera a molécula de carbonato de cálcio (CaCO3). Ar(Ca)=40; Ar(C)=12; Ar(0) = 16; Ar(Cl) = 35; Ar(H) = 1 ; Ar(S) = 32
a) Calcula a sua massa molecular relativa.
b) Qual é a sua massa molar?
c) O que significa dizer que a massa molar do carbonato de cálcio é de 140 g/mol?
d) Qual é a massa de 3,8 mol de CaCO3.​

Bigmart supermarket has different ways of awarding discounts to its customers for each purchase they make. an 8 percent discount is given on the total value of the purchase. in addition, a standard loyalty discount is given if customers have a permanent customer id card. your program should indicate the amount payable by the customer after the discounts. identify the inputs that the program requires from these options: i. the discount percentage ii. the total value of the purchase iii. the loyalty-discount amount iv. the customer id card number v. the amount payable after discount