Other Chemistry Answers

A student was tasked to perform gravimetric analysis of a soluble sulfate. His unknown sample weighed 0.7543 g. The sample underwent

precipitation using BaCl2 and was digested for overnight. The precipitate was then filtered off to obtain white crystalline precipitate that was collected in

an ash less filter paper. In performing constant weighing, he obtained a crucible mass that is 29.9442 g. After burning his samples inside the crucible,

the obtained mass was 30.3375 g. Compute for the mass (g) of BaSO4 from the experiment.

a 0.7650g of sample clay containing 20.50 moisture gave a precipitate potassium perchlorate weighing 0.3822g what is the percentage of k2o in clay on a dry basis

1.

Balance the equation using the ion-electron method.


LiOH(aq) +H2(g) → Li(s) + H2O(l)

how much energy (in kj) is required to heat 25.0 g of H2O (s) at -18.0 degrees celsius to H2O (g) at 130.0 degrees celsius

Calculate the molar refractivity of allyl chloride at a temperature at which it's density is 0.938g cm^-3 the experimentally observed value of refractive index at this temperature is 1.3715.

What is physically imagined by an orbital

discussed the Laws of Thermodynamics and their relation to energy and energy transfer. Energy transfers take place constantly in everyday activities. Think of two scenarios: cooking on a stove and driving. Explain how the second law of thermodynamics applies to these two scenarios.

A piece of food is placed into a bomb calorimeter. How much energy (in food calories/Cal/kcal) was stored in the food if 500. g of water increases from 25 to 75°C

a cylinder of helium gas has a volume of 1.0 L. The gas in the cylinder exerts a pressure of 800 kPa at 30 degrees. What volume would this gas occupy at SATP

Balance the following chemical equations. Always show your solution.

1. ____ N 2 O 5  ____ N 2 + ____O 2


2. ____ C 5 H 12 + ____ O 2  ____ CO 2 + ____ H 2 O


3. ____ C 4 H 6 O 3 + ____ H 2 O  ____ C 2 H 4 O 2