Is spreading butter on bread a chemical change

Why is ice less dense than water? a. The water molecules in ice have less mass than in liquid water b. The water molecules are more closely packed together in ice than in water. c.

Which of the following combinations led to a precipitation reaction? 1. sodium phosphate and sodium iodide 2. lead nitrate and nitric acid 3. silver nitrate and aluminum sulfate 4. sodium phosphate and silver nitrate

An 18-karat gold necklace is 75% gold by mass, 16% silver, and 9.0% copper. A. What is the mass, in grams, of the necklace if it contains 0.24 Oz of silver? B. How many grams of copper are in the necklace.? C.

What happens when aluminum fills its valence shell?

Marking brilliant for answers Which situation represents quickly dissolving a solid solute? Small crystals of solute are dropped into a warm solvent and then stirred. Small crystals of solute are dropped into a cold solvent.

How to find h30 in 0.08m

Nitroglycerin (c3h5n3o9) is a powerful explosive. its decomposition may be represented by 4c3h5n3o9 → 6n2 12co2 10h2o o2 this reaction generates a large amount of heat and gaseous products.

A 3-column table with four rows. The first column has entries Liquid A, Liquid B, Liquid C, Liquid D. The second column titled mass has entries 160 grams, 173 grams, 198 grams, 220 grams.

Which option correctly describes the influence of electronegativity difference on bond character?

How do I write a balanced half-reaction describing the reduction of gaseous dioxygen to aqueous oxide anions?