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Let n be the amount of 20% solution. Then: .08(12)+.2n=.16(12+n) .96+.2n=1.92+.16n .04n=0.96 n=24 liters of 20% solution in the new mix ☺☺☺☺

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Answer is: 3·10⁻⁴ mol of silver atoms. N(silver-Ag) = 1,8·10²⁰. n(Ag) = N÷Na. n(Ag) = 1,8·10²⁰ ÷ 6·10²³ 1/mol = 0,0003 mol = 3·10⁻⁴ mol. N - number of atoms of silver. Na - Avogadro number or Avogadro constant ( 6·10²³ mol⁻¹).¹ n - amount of substance.

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What are the countries?

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It is definitely A Explanation:

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Creo que la respuesta es ayuda

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The non permissible value for y is y≠(-3) Explanation: In this question the given rational expression is (y+3)/(y+3) and we have to get the non permissible values. Here denominator of the fraction should never be 0 otherwise the given expression will be undefined. Therefore So the non permissible value is y≠(-3).

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a.7 students drank grape juice b.13 students did not drink grape juice Explanation:

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Equation 3 it’s the only one that is set up in y=Mx+b form which is the form of a straight line

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A) $0 Explanation: Starting in 2018, the Tax Cuts and Jobs Act eliminates personal exemptions. 2017 was the last year were personal exemptions were still valid and they were valued at per taxpayer, spouse and dependent. The Tax Cuts and Jobs Act of 2017 lowered corporate tax rate (set it to a flat 21%) and lowered most of the personal income tax rates, it also raised standard deductions but suspended personal exemptions.

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0.00867 moldm-3 Explanation: Since the reaction is 1st order, Rate of reaction=∆[A]÷t 0.646-0.0146/72.8= 0.00867 Remember that in a first order reaction, the rate of reaction depends on change in the concentration of only one of the reaction species, A in the problem above.

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