In a calorimetry experiment the following data were obtained. CH2CH2(g) + H2O(ℓ) → C2H5OH(ℓ) ΔH = -288.9kJ

C(s) + O2(g) → CO2(g) ΔH = -395.3kJ

2 H2(g) + O2(g) → 2 H2O(ℓ) ΔH = -587.4kJ

CH2CH2(g) + 3 O2(g) → 2 CO2(g) + 2 H2O(ℓ) ΔH = -1441.1kJ

Using only this data calculate the molar enthalpy of formation for ethanol, C2H5OH(ℓ).

Suppose a lab group reports a ppercent yield of sand of 105. is it really possible to collect more sand than was originally represented? what is the possible explanation for the extra product?

The diagrams show objects’ gravitational pull toward each other. which statement describes the relationship between diagram x and y? gravity attracts only larger objects toward one another. gravity attracts larger objects only if they are close to one another. if the masses of the objects increase, then the force between them also increases. if distance between the objects increases, then the amount of force also increases.

Calculate the mass of carbon in 97.0 g of sucrose c12h22o11