CHEMISTRY MIDDLE SCHOOL

Which element reacts spontaneously with 1.0M HCl (aq) at room temperature?(1) copper (3) silver

(2) gold (4) zinc

Answers

Answer 1
Answer: (4) Zinc is correct answer. Others don't react at room temperature with HCl because their reactivity (capability to react) is quite low.
Answer 2
Answer: (4) zinc.................

Related Questions

Ca(OH)2 + H3PO4Double Replacement Reaction
Which structures are found in both prokaryotic cells and eukaryotic cells?Choose all answers that are correct. A. cytoplasm B. flagella C. pili D. plasma membrane E. ribosomes
what rule can you state about the relationship between phase changes and temperature?Between phase changes and heat energy
Water initially present in a state where molecules are far apart. During a chnge of state, its molecules slow down. Which change of state has most likely taken place?A. From gas to a liquid B. From a liquid to gasC. From solid to liquidD. From a gas to plasma
A positive ion has moreA. protons than electrons B. electrons than protons C. neutrons than protons

Will you Please answer 20!

Answers

Yes because plants are a source of food for some animals

Answer:

yes because the plants is what we need to live they provide us with many things.

The melting point of table salt is 801 degrees celsius. is this a physical or chemical property?

Answers

It is a Physical property because like water it changes into a ice cube but it can be melted into water or be turned back into an ice cube.

Why does tap water or pool water typically test positive for the presence of chlorine

Answers

pool water contains chlorine to keep it sanitary

What does the atomic numbrr represent on the periodic table?​

Answers

Answer:

Explanation:

The atomic number tell us the number of protons and neutrons in the nucleus of an atom. in other words ,each element has a unique number that identifies how many protons are in one atom of that element example, all hydrogen atoms, and only hydrogen atoms, contain one proton and have an atomic number of 1.

How many moles of hydrogen gas are generated when 4.0 moles of water react with excess calcium

Answers

Answer:

2moles of H2

Explanation:

First, let us generate a balanced equation for the reaction between calcium and water. This is illustrated below:

Ca + 2H20 —> Ca(OH)2 + H2

From the equation,

2moles of H2O produced 1mole of H2.

Therefore 4moles of H2O will produce = 4/2 = 2moles of H2.

Is the Peruvian flower angiosperm or gymnosperm

Answers

Answer:

angiosperm

Explanation:
My phone is messed up it might comment on your question I’m sorry
Other Questions
PLEASE HELP ME RIGHT NOW PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!--INCLUDING LOUISIANA AND MINNESOTA--- ,THERE ARE 24 STATES WEST OF THE MISSISSIPPI RIVER . HOW MANY STATES THEN ARE EAST OF THE MISSISSIPPI RIVER?PLEASE SOMEBODY ANSWER THX!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
From the list below, determine which properties are for compounds.It takes a large amount of energy to separates the elements of a compound.11. The proportions of the elements in a compound are always fixed.TIL. It is easy to separate the elements of a compound.IV. The elements/components of a compound do not retain their individual properties.Eliminate
What conditions produce the fastest weathering
Which is an example of the strong force in action?A battery-powered radio produces sound.A magnet keeps a cabinet door closed.The Sun pulls on Earth as Earth moves around the Sun.The protons in the nucleus of a carbon atom are held together.