Question

if q= 176.5 joules absorbed c=129 j/g c, t=18c what is m

Answer 1

Use q = m c ΔT, so m = q / (c ΔT).

m = 176.5 J / (129 J·g⁻¹·°C⁻¹ × 18 °C) = 176.5 / 2322 ≈ 0.0760 g

(= 7.60 × 10⁻² g or 7.60 × 10⁻⁵ kg).