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Mice21 [21]
3 years ago
15

True or False sound needs a medium to travel​

Chemistry
2 answers:
astra-53 [7]3 years ago
5 0

Answer:

True or T

Explanation:

Is the correct answer please make me brainliest

Allisa [31]3 years ago
4 0

TRUE

CAUSE,...

Sound is a mechanical wave that needs a material medium like air, water, steel, etc.,

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4. Identify items in your life that are made of each type of element: metal, nonmetal, and metalloid. For each item, explain why
Neko [114]
Bed frame is metal so it is able to be sturdy and hold up
cleaning agents are mettaliods some contain boron to control strength of bleach , and removing stains 
plotting soil is non metal it is rich with nitrogen which is good for plants 
3 0
3 years ago
Which quantity is equivalent to 50 kilocalories
Tanya [424]

I believe this problem have these following choices:

5,000 cal

0.05 cal

5 x 10^3 cal

5 x 10 ^4 cal

 

<span>Now 1 kilocalorie  = 1000 calories, therefore:</span>

 

50 kilocalories * (1000 calories / 1 kilocalorie) = 50,000 calories

 

 

Since there are 4 zeroes, so the scientific notation is:

 

5 x 10 ^4 cal         (ANSWER)

7 0
4 years ago
What word or two-word phrase best describes the shape of the nitrite ( NO2- ) ion?
Olin [163]

I think the answer would be nitrogen

6 0
3 years ago
Read 2 more answers
Select the correct answer.
elena-s [515]

Answer:

B. CO + H₂O → H₂ + CO₂

Explanation:

Redox reaction -

It is the type of reaction , where the process of oxidation and reduction takes place simultaneously , is known as a redox reaction .

Oxidation refers to the addition of oxygen atom or the removal of hydrogen atom .

And ,

Reduction refers to the addition of hydrogen atom or the removal of the oxygen atom .

From the options given in the question , the only reaction , which have both the process of oxidation as well as reduction , is  -

CO + H₂O → H₂ + CO₂

In the above reaction ,

Oxidation process -  CO → CO₂ ,

The addition of oxygen atom .

Reduction process - H₂O → H₂ ,

The removal of oxygen atom .

5 0
3 years ago
Determine the ratio of amount NaOH reacting per unit amount FeCl3. Enter an integer that represents x mol NaOH/1 mol FeCl3.
earnstyle [38]
Answer is: the ratio of amount NaOH reacting per unit amount FeCl₃ is 3 mol NaOH /1 mol FeCl₃.

Balanced chemical reaction:
3NaOH(aq) + FeCl₃(aq) → 3NaCl(aq) + Fe(OH)₃(s).
NaOH is sodium hydroxide.
FeCl₃ is iron(III) chloride.
Coefficient for sodium hydroxide is three and for iron(III hydroxide is one.
8 0
3 years ago
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