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Math; PLEASE CHECK MY ANSWERS
1.Which of the following is greater than 4.3x10^9 A)2.1x10^9 B)3.2x10^9 C)5.3x10^9 D)7.4x10^8*** 2.Which of the following are less than 6.5x10^5? A)1.4x10^3 B)2.5x10^4 C)7.8x10^5 D)4.6x10^6*** 3.Which number is greater than

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2. What answer represents this number in scientific notation? 0.00000916 a. 916 x 10^8 b. 9.16 x 10^6 c. 916 x 10^8 d. 9.16 x 10^6 3. What is this number in standard form? 6.8 x 10^4 a. 5,750,000,000 b. 575,000,000,000 c.

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Which of the following is less than 6.5×10^5 A. 1.4x10^3*** B. 2.5x10^4 C. 7.8x10^5 D. 4.6x10^6 Please check my answer

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For the reaction 2A(g) + B(aq) + 3C(l) D(s) + 3E(g), the concentrations at equilibrium are found to be: A: 2.3x10^3 Pa B: 1.8x10^2 M C: 15.8M D: 12.5M E: 5.6x10^4 Torr Find the numerical value of the equilibrium constant that

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One microgram is equal to 1x10^6 gram. If the mass of a substance is 8x10^9 micrograms, what is its mass in grams? a) 1.25x10^15 b) 1.25x10^3 c) 8x10^3 d) 8x10^15

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For the reaction 2A(g) + B(aq) + 3C(l) D(s) + 3E(g), the concentrations at equilibrium are found to be: A: 2.3x10^3 Pa B: 1.8x10^2 M C: 15.8M D: 12.5M E: 5.6x10^4 Torr i got an answer of 1.83x10^13 is this correct??

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1)(2.3x10^2)(4.5x10^7)= 1.035x10^6 2) 4.8x10^2/1.2x10^5= 4.8x10^3
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