Which element is a metalloid? Check all that apply.

selenium (Se)

polonium (Po)

silicon (Si)

iodine (I)

tin (Sn)

antimony (Sb)

phosphorus (P)

How many atoms of each element are in one molecule of this product.

What would happen i you put a nickle and a penny in with hydrogen proxide

The relationship between the pitcher plant and the insects is an example of (competition/predation/symbiosis).

Which of the following reactions occurs most rapidly at room temperature? a. 2AgNO3 (aq) + Na2CrO4 (aq) → Ag2CrO4 (s) + 2NaNO3 (aq) b. CaO (s) + 3C (s) → CaC2 (s) + CO (g) c. SnO2 (s) + 2CO (g) → Sn (s) + 2CO2 (g) d. 2Fe (s) + O2 (g) → 2FeO (s)

A 25 mL sample of 0.100 M HNO3 completely reacts with NaOH according to this equation: HNO3 (aq) + NaOH (aq) → NaNO3 (aq) + H2O (1) How many moles of HNO3 are in the sample?

Which is the MOST accurate description about how the different types of feedback mechanisms work

What was one of the main benefits to the use of the icebox for cooling food?

How many moles of chlorine gas would occupy a volume of 35.5 L at a pressure of 0.98 atm and a temperature of 373 K?

What are the building blocks

If the specific heat of copper is 0.711 J/g•°C, how much copper would it take if the heat given off is 54.85 calories and the temperature change is 205°C.