In which block is platinum (Pt)?

How many moles are equivalent to 55.5g of nano3

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

At stp, which substance is the best conductor of electricity? a. nitrogen b. neon c. sulfur d. silver