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What is the scientific name of the family to which these spiders belong? (Hint: these spiders build a messy web and have flexible, pseudosemented tarsi)

What is the scientific name of the family to which these spiders belongs?

What is the scientific name of the family to which this spider belongs? (Hint: This spider builds an orb web and has elongated endites).    

The name of PCl3 is ________.

Osmium has a density of 22.6 g/cm3. What volume (in cm3) would be occupied by a 21.8 g sample of osmium? YOU MUST SHOW WORK FOR THIS QUESTION

Element X has three naturally occurring isotopes. The masses (amu) and % abundances of the isotopes are given in the table below. The average atomic mass of the element is ________ amu. YOU MUST SHOW WORK FOR THIS QUESTION              

45 m/s = ________ km/hr YOU MUST SHOW WORK FOR THIS QUESTION

The formula weight of Zn(ClO4) is ________ amu. YOU MUST SHOW WORK FOR THIS QUESTION

Which of the following are decomposition reactions? 1) CH4 (g) + O2 (g) → CO2 (g) + H2O (l) 2) CaO (s) + CO2 (g) → CaCO3 (s) 3) Mg (s) + O2(g) → MgO (s) 4) PbCO3 (s) → PbO (s) + CO(g)

During a sudden outbreak of Salmonella, an epidemiologist creates a spot map showing the exact residential locations of all affected individuals. Which step is being performed?