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2 years ago

What energy transfer is occurring when you make a call on a phone?

Chemistry

2 answers:

irga5000 [103]2 years ago

7 0

When you make a call, the electricity turns into sound.

Hope this helped! c:

dimulka [17.4K]2 years ago

7 0

Answer: option B

Explanation: a.combustion is an example for chemical energy into light. Example burning of wood

B. Exothermic chemical reactions releases energy in the form of heat..

Example burning of coal

C. Electric kettle, motor's sound and motorcycle sound are examples for heat to sound

D. Mobile speakers are examples for electrical to sound

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I don't know how to do any of these.plz help.its a study guide for my chemistry exam tomorrow ✌

Vladimir [108]

6.02 x 1023 atoms weigh out 63.55 grams copper.

No. of Molecules in water = 3.5mole x (6.02 x 10^23) molecules/mole = 2.107 x 10^24 molecules of H2O

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3 years ago

Give the o.N. Of each of the elements magnesium and oxygen in the reactants and in the products 2Mg + O2=2MgO

vlada-n [284]

Answer:

$2Mg^0 + O_2^0\rightarrow2Mg^{2+}O^{2-}$

Explanation:

Hello there!

In this case, according to the rules for the oxidation states in chemical reactions, it is possible to realize that lone elements have 0 and since magnesium is in group 2A, it forms the cation Mg⁺² as it loses electrons and oxygen is in group 6A so it forms the anion O⁻²; therefore resulting oxidation numbers are:

$2Mg^0 + O_2^0\rightarrow2Mg^{2+}O^{2-}$

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2 years ago

What is the percent by mass of 15g of sugar of 70g of water?

Mama L [17]

Answer:

lol u have mrs carnes

Explanation:

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3 years ago

How many moles are in 564 grams of Copper

nexus9112 [7]

63.55 is how many miles are in 564 grams of copper

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3 years ago

PLEASE HELP ILL GIVE BRAINLIEST

tino4ka555 [31]

Answer:

False

Explanation:

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3 years ago

Read 2 more answers