Chemistry, 26.08.2019 11:30, help1219

I'm taking a test tomorrow.
i need to use the kinetic energy formula, k=3/2nrt. i know that t is the temperature, and n is the number of moles. i know that r is the constant.
but, i can't remember what the number is. i keep remembering 8.354, but i'm not sure that's correct. can anyone me what the number for r always is?

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I'm taking a test tomorrow.
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