クイズギャラリーに戻る
化学
中学1〜3年
問題プレビュー
全11問のうち最初の5問を表示中——無料登録すればクイズ全体を取り込んでクラスで遊べます。
1
What is the primary purpose of scientific notation in chemistry?
A
To express very large or very small numbers in a compact form
B
To balance chemical equations
C
To calculate the molar mass of compounds
D
To convert between different units of measurement
2
Which of the following numbers is written correctly in scientific notation?
A
0.125 × 10^4
B
12.5 × 10^3
C
125 × 10^1
D
1.25 × 10^3
3
Convert 0.00045 to scientific notation.
A
4.5 × 10^-4
B
4.5 × 10^4
C
45 × 10^-5
D
0.45 × 10^-3
4
Express 6.02 × 10^23 in standard decimal form.
A
602,000,000,000,000,000,000,000
B
602,000,000,000,000,000,000
C
60,200,000,000,000,000,000,000
D
6,020,000,000,000,000,000,000,000
5
How many centimeters are in 2.5 meters?
A
250 cm
B
2500 cm
C
25 cm
D
0.025 cm