Bentuk umum persamaan kuadrat adalah ax2 + bx + c = 0 maka nilai a,b,c untuk persamaan x2 – 2x + 5 = 0 berturut-turut adalah .... A. 0, 2, 5 C. 1, -2, 5 B. 1, 2, 5 D. 0, -2, 5 kunci jawabnya C, help caranya mengapa bisa C. 1, -2, 5. Cara lengkap yaa

mass of Na2CO3 = 106g/mol
1 mole of Na2CO3 ------------ 106g x moles of Na2CO3 ------------ 2.25g x = 0.0212 moles of Na2CO3

mass of NaOH = 40g/mol

1 mole of NaOH ----------------- 40g
x moles of NaOH -------------------- 0.800g
x = 0.02 moles of NaOH

mass of Na2SO4 = 142g/mol
1 mole of Na2SO4 ---------------- 142g x moles of Na2SO4 ------------------ 17.75g x = 0.125 moles of Na2SO4

Answered by pyromorphite | 2024-06-10

The number of moles for the substances calculated are approximately: 0.0212 moles for 2.25 g of Na₂CO₃, 0.0200 moles for 0.800 g of NaOH, and 0.125 moles for 17.75 g of Na₂SO₄. The calculations use the formula for moles based on mass and molar mass. Each molecular weight was calculated based on the atomic weights of the constituent elements.
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Answered by pyromorphite | 2025-01-06

Jawaban: untuk ax²+bx+c= 0 ini ada persamaan umumnya dan sudah di katakan nilainya a,b,c yaa sama saja ketika memasuki persamaan x²-2x+5=0 tinggal di lihat saja angka depannya jdi di dapat 1, -2, dan 5

Answered by thasya392 | 2025-07-09