Calculate the amount of energy released when 17.95 g of a substance is frozen. The molar mass of the substance is 104.73 g/mol. The molar enthalpy of fusion for the unknown substance is 2.33 kJ/mol.​

Which of the following mining methods disrupts the sea floor?

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

Balance and in which category does it fit in? single or double displacement or synthesis or decomposition? (a) k2 o → k + o2 (b) na + i2 → nai (c) cu(no3 )2 + naoh → cu(oh)2 + nano3 (d) kclo3 → kcl + o2 (e) ca(no3 )2 + hbr → cabr2 + hno3 (f) sn(oh)2 → sno + h2 o (g) p4 + n2 o → p4 o6 + n2 (h) fe + al2 (so4 )3 → feso4 + al (i) alcl3 + na2 co3 → al2 (co3 )3 + nacl (j) c3 h6 + o2 → co2 + h2 o