Which of these reactions can be classified as double replacement reactions?

zn + 2hcl → zncl2 + h2

2nacl + f2 → 2naf + cl2

2albr3 + 3k2so4 → 6kbr + al2(so4)3

2k + mgbr2 → 2kbr + mg

Which of the following best explains why the end of a spoon sticking out of a cup of hot water also gets hot? question 7 options: the heat from the hot water is conducted through the spoon handle the hot water heats the air surrounding the upper part of the spoon. the hot water causes a physical change in the spoon handle. the hot water causes a chemical reaction to take place in the spoon.

How can you use chemical equations to predict the products of the reaction you can carry out?

How many atoms of mg are present in 97.22 grams of mg? 6.022 × 1023 2.408 × 1024 4.818 × 1024 5.855 × 1025