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Common Test essentials: original practice

Original practice on Common Test structure, the mole concept, and dice probability, plus a short quiz.

3 flashcards · Curated by Ada

Question 1: How many days does Japan's Common Test take, and what is the usual score range for one subject?

Answer

Two days, with each subject usually scored from 0 to 100.

The Common Test runs over two days. Universities combine the per-subject score, usually on a 0-100 scale, with their own secondary exams and materials.

Question 2: How many moles of water are in 36.0 g of H2O? Use a molar mass of 18.0 g/mol.

Answer

2.0 mol.

The number of moles is mass divided by molar mass, so 36.0 g / 18.0 g/mol = 2.0 mol.

Question 3: Two fair six-sided dice are rolled. What is the probability that the two results add up to 7?

Answer

1/6.

There are 36 equally likely pairs, and 6 of them sum to 7: (1,6), (2,5), (3,4), (4,3), (5,2), (6,1). So the probability is 6/36 = 1/6.