Is gold a compound or an element

What kind of bond is Al2 (CO3) 3

The adult blue whale has a lung capacity of 5.0*103 L5.0*103 L. Calculate the mass of air (assume an average molar mass 28.98 g/molg/mol) contained in an adult blue whale's lungs at 0.2 ∘C∘C and 1.07 atmatm, assuming the air behaves ideally.

Use these statements about valence electrons to answer the question. 1. All valence electrons are used to form bonds with other atoms or ions. 2. Bonding electrons are represented by a single dot in an electron dot diagram. 3.

2) The reaction above shows an simple chemical reaction involving the combustion of ethane, a fuel in the presence of oxygen gas to form water and carbon dioxide.

Octane (c8h18) reacts with oxygen (o2) to form carbon dioxide (co2) and water (h2o). when the equation below is balanced, the coefficient of octane is: c8h18 + o2 → co2 + h2o

What is one way to speed up a chemical reaction without otherwise affecting the reaction? a. add a catalyst b. decrease surface area c. change the products d. change the reactants

Why is halleys comet part of our solar system?

Fluorine-18, which has a half-life of 110 min, is used in PET scans. a. If 100. mg of fluorine-18 is shipped at 8:00 a. m., how many milligrams of the radioisotope are still active after 110 min? b. If 100. mg of fluorine-18 is shipped at 8:00 a. m.

The reaction of methane with water to form carbon dioxide and hydrogen is non - spontaneous at 298 k. at what temperature will this system make the transition from non-spontaneous to spontaneous? the data refer to 298 k.

The sedimentary rock formed when water deposits tiny particles of clay in very thin flat layers is called? a. gymsum b. shale c. limestone d. calcite