Which sample of matter has a crystal structure?

(1) Hg (ℓ)

(2) H2O (ℓ)

(3) NaCl (s)

(4) CH4 (g

Which scientist offered proof that atoms exist? a. Aristotle b. Democritus c. John Dalton d. Isaac Newton

A negatively charged particle is attracted to A. All particles that are located close by. B. Only particles that are large. C. Negatively charged particles. D. Positively charged particles. Reset Submit

Describing chemical reactions

What is always true of a weak acid

A chemist designs a galvanic cell that uses these two half-reactions: half-reaction standard reduction potential MnO4⁻ (aq) + 8H⁺ (aq) + 5e⁻ → Mn (aq) ²⁺ + 4H2O (l) E⁰red = + 1.51V Fe³⁺ (aq) + e⁻ → Fe²⁺ (aq) E⁰red = + 0.

A patient needs 0.024 g of a sulfa drug. There are 6-mg tablets in stock. How many tablets should be given? Express your answer as an integer.

What does the periodic table displays

Consider the reaction: 2A (g) + B (g) →3C (g). When A is decreasing at a rate of 0.200 M⋅s-1, how fast is B decreasing?

2.70 feet is the same as how many cm?

Which two body systems contribute to acid-base balance of blood?