The harp-life of silicone 32 is 100 years. How much of a 120 g sample will remain after 300 years?

The complete combustion of 0.661 g of a snack bar in a calorimeter (Ccal = 6.15 kJ/°C) raises the temperature of the calorimeter by 1.63 °C. Calculate the food value (in Cal/g) for the snack bar.

What is included in a compaarative investigation

Betty baked a batch of blueberry muffins, Baking is an example of a chemical change a physical change an elemental change a periodic change

Analyze the graph below and answer the question that follows. / In the graph above, the coordinates of the vertices of / are T (4, 4), U (2, - 2), and V (6, - 2). If / is reflected across the y-axis to create /, what are the coordinates of U'? A.

Anyone know how to calculate moles? for chem. If the atmospheric pressure in the laboratory is 1.2 atm, how many moles of gas were in each syringe? ^ this is my question Trial 1: volume for syringe: 4.2 ml temperature: 0.

Which indicator will be the same color in hydrochloric acid as it is in pure water? 1. methyl orange 2. phenolphthalein 3. bromcresol green

Based on your knowledge of energy resources conservation, which of the following statements is true? a) Manufacturers can increase a light bulb's energy efficiency by using technology that decreases the amount of electromagnetic energy the bulb

Ammonia (nh3 (g), hf = - 46.19 kj/mol) reacts with hydrogen chloride (hcl (g), hf = - 92.30 kj/mol) to form ammonium chloride (nh4cl (s), hf = - 314.4 kj/mol) according to this equation:

How does an electromagnet create a magnetic field

Magnetism, reactivity, and fluorescence are three special properties used to identify minerals. true or false