Compare the following numbers:
(i) `2. 7xx10^(12)` and `1. 5xx10^8`
(ii) `4xx10^(14)` and `3xx10^(17)`

Compare the following numbers : (i) 27 xx 10^12, 15 xx 10^8 (ii) 4 xx 10^14, 3 xx 10^17

Express the following numbers in usual form. (i) 3.52 xx 10^2 (ii) 7.54 xx 10^-4 (iii) 3 xx 10^(05)

Express the following numbers in usual form. (i) 3.02 xx 10^-6 (ii) 4.5 xx 10^4 (iii) 3 xx 10^(-8) (iv) 1.0001 xx 10^9 (v) 5.8 xx 10^12 (vi) 3.61492 xx 10^6

Write the following numbers in the usual from: (i) 4. 83xx10^7 (ii) 3. 21xx10^5 (iii) 3. 5xx10^3

Write the following numbers in the usual form: (i)7.54 xx10^6 (ii) 9.325 xx10^(12) (iii)8.4 xx10^2

Express the following numbers in the standard form: 3,18,65,00,000 (ii) 846xx10^7 (iii) 723xx10^9

Find the number from each of the following expanded forms : , (a) 8 xx 10^4 + 6 xx 10^3 + 0 xx 10^2 + 4 xx 10^1 + 5 xx 10^0 , (b) 4 xx 10^5 + 5 xx 10^3 + 3 xx 10^2 + 2 xx 10^0 , (c) 3 xx 10^4 + 7 xx 10^2 + 5 xx 10^0

Calculate the following a. (6.7 xx 10^(5)) xx (4.6 xx 10^(4)) b. (7.6 xx 10^(7)) xx (3.8 xx 10^(-4)) c. (6.8 xx 10^(-3)) xx (5.2 xx 10^(-4)) d. (6.7 xx 10^(5)) / (4.6 xx 10^(4)) e. (7.6 xx 10^(7)) / (3.8 xx 10^(-4)) f. (6.8 xx 10^(-3)) / (3.8 xx 10^(-4)) g. 7.65 xx 10^(2) + 2.72 xx 10^(3) h. 7.87 xx 10^(-4) - 2.61 xx 10^(-5)

How many significant figures are there in the following numbers? (i) 67.8+-0.3 (ii) 4.899xx10^(9) (iii) 3.56xx10^(-6) (iv) 0.0065

What is the pH of the following solutions: a. 10^(-8)M HCl b. 5 xx 10^(-8) M HCl c. 5xx10^(-10)M HCl d. 10^(-3) M HCl