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2 years ago

On a periodic table, element names are represented by: A. numbers B. chemical symbols C. pictures D. matter

2 answers:

5 0

Hello!

This must be a multiple choice question.

On a periodic table, every element is listed by it's element symbol and atomic number. For example, the atomic number and symbol for gold are 79 and Au. So, the answers are: A. Numbers and B. Chemical symbols.

kifflom [539]2 years ago

4 0

Elements on the periodic table are represented by chemical symbols.
Ex: O means Oxygen
Ex: Ag means Silver

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How do atoms make molecules?

bazaltina [42]

Explanation:

Atoms can join together - they form bonds together - to make MOLECULES. ... For example, a hydrogen atom forms one bond, an oxygen atom forms two, and carbon forms four bonds. Look at that molecule of water again - each hydrogen has one bond, and the oxygen in the middle has two bonds. Molecules can be much bigger.

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2 years ago

Instruction

valkas [14]

Answer:

A: object 1

B: object 2

C: object 1

D: object 1

Explanation:

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2 years ago

Read 2 more answers

How does the amount of salt dissolve in water affect the density of water

ad-work [718]

Answer:

Adding salt to the water increases the density of the solution because the salt increases the mass without changing the volume very much. When you add table salt (sodium chloride, NaCl) to water, the salt dissolves into ions, Na+ and Cl-. The volume increases by a small factor, but the mass increases by a bigger factor.

Explanation:

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3 years ago

Liquids that do not mix are called

djyliett [7]

Answer:

Immiscible liquids

Explanation:

Immiscible comes from two words; 'im' indicating a negation or a contradiction; and 'miscere' meaning to mix.

Putting the words together, immiscible means not able to mix.

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2 years ago

Modern pennies are composed of zinc coated with copper. A student determines the mass of a penny to be 2.483 g and then makes se

Aleonysh [2.5K]

Answer:

97.1%

Explanation:

Using the ideal gas equation, the number of moles of hydrogen gas produced can be calculated from information provided about the volume of gas evolved at a given temperature and pressure.

The stoichiometry of the reaction is now used to obtain the number of moles of Zn that will produce a given number of moles of hydrogen from the balanced reaction equation as shown. This gives us the number of moles of zinc reacted hence the mass of zinc in the coin since it is assumed that all the zinc reacts.

This is now used to calculate the mass percentage of Zn as shown.

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2 years ago