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danielearaujo
@danielearaujo
October 2020
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URGENTE ME AJUDEM A RESPONDER MAIS 4 PERGUNTAS!!!
1-calcule quantos moles de moléculas de um gás em CNTP temos em 11,2L?
2-quantos moles de moléculas temos em 58,8g de acido forico (H3PO4)?
H=1 P=31 O=16
3-qual o volume ocupado por 20g de trioxido de enxofre (SO3) em CNTP?
S=32 O=16
4-quantos átomos temos em 12,6g de agua (H2O)?
H=1 O=16
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PROGRESSAO ARITMETICA numa PA, a8=16 e a10=20. calcule a1, r e a20
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PROGRESSAO ARITMETICA:numa PA, a7=-49, a1=-73. calcule a10=???
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