galvansereena galvansereena

04-06-2021
Chemistry

contestada

If 81g of water is measured out, how many moles are in the sample? *
A. 4
B. 5
C. 2.5
D. 4.5

Respuesta :

unknown767 unknown767

05-06-2021

Answer:

D

Explanation:

because moles = mass /mr

so 81/18(mr of H2O=2+16)

moles =4.5

hope this helps:)

Answer Link

Otras preguntas

Point I is on line segment HJ. Given I J equals 3X +3, HI equals 3X-1, and HJ equals 3X +8, determine the numerical length of HJ.

solve for p p/9 = 7/9

It is not advisable to construct houses near airports. Justify your answer

Which phrase matches the algebraic expression below? 3(x + 7) + 10 Three times the sum of x and seven plus ten Three times x plus the sum of seven and ten Thre

A single card is drawn from a standard 52 card deck. Work out the probability of choosing the "9 of spades" Give your answer in its simplest form

when a certain number x is multiplied by 3 and then add 4. The result is 19

Which sentence has an adjective clause?

3. (a) Calculate the compound interest over an amount of N$ 58 000 that is invested for 6 years at a rate of 5% pa

Suppose we get 24 inches of snow tomorrow. Warm weather comes the next day. For the next several days it stays warm and begins to melt the snow. If the snow mel

If f(x) = 4x + 2 and g(x) = x2 + 7, find each value: 1. f(4) 2. f(-2)