What are teo physical changes of lanthanum

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh

Calculate the standard enthalpy of formation of liquid methanol, ch3oh(l), using the following information: c(graphite) + o2 latex: \longrightarrow ⟶ co2(g) latex: \delta δ h° = –393.5 kj/mol h2(g) + o2 latex: \longrightarrow ⟶ h2o(l) latex: \delta δ h° = –285.8 kj/mol ch3oh(l) + o2(g) latex: \longrightarrow ⟶ co2(g) + 2h2o(l) latex: \delta δ h° = –726.4 kj/mol

How many joules of heat are required to raise thetemperature of 750 g of water from 11.0 °c to 19.0 °c?