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Alan P. Jul 10, 2015. 0.8 is a rational number (which implies that it is also a real number) Explanation: 0.8 can be expressed as the ratio of two integers (namely 8 10) which is the definition of a rational number. Rational numbers are a subset of Real numbers. Answer link.
4/5 Think of decimal numbers as being fractions of 1, it's a good place to start: 0.8=0.8/1 Most fractions need to have integers in the numerator, so we should first multiply our integer to remove all decimals. In this scenario, we multiply the top and bottom by 10: 0.8/1xx10/10=8/10 Now, we reduce to the lowest whole number. Both the numerator and the denominator are divisible by 2, so let's ...
It is a rational and real number. Any number we use is real (there are others like complex, but they are very rarely used). If a number consists only of sign and digits (like 0;327;98765;-5;-789 and so on) then it is a whole number or integer. A rational number is any number that can be repesented as a fraction. So every integer is also a rational number (because it can be written as a ...
Mixed fractions are a combination of a whole number and a regular (or proper) fraction. In this case, #2.33# is equal to 2 and 1/3 , or 7/3 , and #1.67# is equal to 1 and 2/3 , or 5/3 . This makes the ratios equal to
Explanation: "Percent" or "%" means "out of 100" or "per 100", Therefore 0.8% can be written as 0.8 100. We can now multiply by a form of 1 to eliminate the decimal in the numerator: 10 10 × 0.8 100 ⇒ (10× 0.8)(10× 100) ⇒ 8 1000. We can reduce the fraction as: 8 ×1 8 × 125 ⇒ 8 ×1 8 × 125 ⇒ 1 125. See a solution process below ...
0.008 = 1/125 A percent is always a value given out of 100. 0.8% = 0.8/100 = 8/1000 8/1000 can be written as a decimal as 0.008 8/1000 can simplify to 1/125
62.5 mL of HCl is required. For this type of problem, we want to use the following dilution formula: C_1 is the initial concentration V_1 is the initial volume C_2 is the final concentration V_2 is the final volume * TIP. * Whenever you are diluting a solution (going from a highly concentrated substance to a less concentrated substance by increasing the volume of the solvent) you always use ...
V = n ⋅ V molar. For 2 moles of a gas at STP the volume will be. 2 moles ⋅ 22.4 L/mol = 44.8 L. For 0.5 moles the volume will be. 0.5 moles ⋅ 22.4 L/mol = 11.2 L, and so on. The molar volume of a gas is derived from the ideal gas law P V = nRT: P V = nRT → V = nRT P → V n = RT P. Let's say you were given a temperature of 355 K and a ...
"160 g" Molarity is given by "Molarity" = "Moles of solute"/"Volume of solution (in litres)" "2.00 M" = "n"/"2.00 L" "n = 4.00 mol" Molar mass of "NaOH" is "40 g/mol" So, mass of "NaOH" needed is 4.00 cancel"mol" × 40\ "g"/cancel"mol" = "160 g"
molecular formula = n × empirical formula. And so we can solve for n. n × {12.011 +2 ×1.00794 +16} ⋅ g ⋅ mol−1 = 180.1 ⋅ g ⋅ mol−1. And thus n = 6, and the molecular formula is C6H 12O6. You will be doing a lot of these problems over the years, so if there is something you cannot grasp, now is the time to address it. Good luck.