Question 1(Multiple Choice Worth 4 points) (04.03 LC)
Which of the following steps can be used to identify a double replacement reaction?
O Check whether the products are salt and water.
O Check whether the reactants are an acid and a base.
O Check if the ions of two compounds exchange places.
O Check if one element replaces another element in a compound.

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

Apiece of metal with a length of 1.42 cm was measured using four different instruments. which of the following measurements is the most accurate?

Consider the following unbalanced equation for the combustion of hexane: αc6h14(g)+βo2(g)→γco2(g)+δh2o(g) part a balance the equation. give your answer as an ordered set of numbers α, β, γ, use the least possible integers for the coefficients. α α , β, γ, δ = nothing request answer part b determine how many moles of o2 are required to react completely with 5.6 moles c6h14. express your answer using two significant figures. n n = nothing mol request answer provide feedback