Why do you cool down tea extract in ice to below 40°c before adding dichloromethane?

For a particular isomer of C 8 H 18, the combustion reaction produces 5099.5 kJ of heat per mole of C 8 H 18 (g) consumed, under standard conditions. C 8 H 18 (g) + 25 2 O 2 (g) ⟶ 8 CO 2 (g) + 9 H 2 O (g) Δ H ∘ rxn = - 5099.

The specific heat capacity of gold is 0.128 J/g C. How much would be needed to warm 250.0 grams of gold from 25.0 C to 100.0 C.

Which of the following displacement reactions can occur? ) A) CuSO4 + Ag Cu + AgSO4 ) B) 2Ba (NO3) 2 + Zn 2Ba + Zn (NO3) 2 ) C) 2AgNO3 + Zn 2Ag + Zn (NO3) 2 ) D) MgSO4 + Zn ZnSO4 + Mg ) E) 2NaNO3 + Zn 2Na + Zn (NO3) 2

How do you know a chemical reaction has taken place?

If you visited a virtual Newton's Cradle website or played with the real device, you might have noticed that after a few swings, the balls slow down. The height they reach gets shorter and shorter until they finally stop moving.

Given the reaction 2NaOH + H2SO4 = Na2SO4 + 2H2O, what is the total number of grams of NaOH needed to react completely with 196 grams of H2SO4

The mass flow rate of gasoline leaving a refinery is 1610 kg/min. The specific gravity of a gasoline is 0.700. A retail gasoline pump is able to fill a 20.0 gallon automobile tank in 1.80 minutes.

Calculate the solubility of cux (ksp=[cu2+][x2-]=1.27*10-36) in a solution that is 0.190 m in nacn.

An atom has seven valance electrons which element could have this type of atom

How is the ocean important to human survival? restate the question