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Akimi4 [234]
3 years ago
7

Utilizing dimensional analysis, find the number of inches in a kilometer given that 1 inch = 2.54 centimeters

Chemistry
2 answers:
abruzzese [7]3 years ago
8 0

Answer:

The correct answer is 39,370.

maxonik [38]3 years ago
4 0
To answer this item, we need to utilize the appropriate the conversion factors and the dimensional analysis. 

Our basis for solving is 1 kilometers. It is known that each kilometer is composed of 1000 meters. 
  
          (1 km) x (1000 m/1 km) = 1000 m

Next, we need to determine the number of centimeters. The conversion factor that can be used is 1 meter = 100 centimeters
          (1000 m) x (100 cm/ 1 m) = 100,000 cm

Lastly, we use the given conversion factor to convert the centimeters to inches.
  
              (100,000 cm) x (1 inch / 2.54 cm)
                     = 39,370.08 in

<em>ANSWER: Each kilometer is composed of 39,370.08 inches</em>
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CuSO4.5H2O(k) ısı CuSO4(k) + 5 H2O(g) eşitliğine göre bakır sülfatın kristal suyu miktarı ve kaba formülü hesaplanacaktır.
baherus [9]

Answer:

159.609 g/mol

Explanation:

According to the CuSO4.5H2O (k) heat CuSO4 (k) + 5 H2O (g) equation, the crystal water amount of copper sulfate and its rough formula will be calculated.

Weight of copper sulfate containing crystal water = m1 = 249.62… g

Weight of copper sulfate without crystal water weighed = m2 = 159.62 g

Accordingly, calculate the x and y values ​​in the molecular formula of copper sulfate (xCuSO4.yH2O).

3 0
3 years ago
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pychu [463]
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7 0
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Colton has an ice cube that has a mass of 4 grams. He places it in a sealed container and then puts it in the microwave on high.
Bas_tet [7]

I believe the answer is D.

The reason is because mass cannot be destroyed. All the mass can really do is become more of less dense.  

5 0
3 years ago
What do you think happens to the cells when they do not get the oxygen they need? Why?
ivanzaharov [21]

Answer:

the cells start to deteriorate

Explanation:

the lack of oxygen to your body and cells will cause them to break down.

4 0
3 years ago
A chemistry student weighs out of lactic acid into a volumetric flask and dilutes to the mark with distilled water. He plans to
34kurt

Answer:

28.0mL of the 0.0500M NaOH solution

Explanation:

<em>0.126g of lactic acid diluted to 250mL. Titrated with 0.0500M NaOH solution.</em>

<em />

The reaction of lactic acid, H₃C-CH(OH)-COOH (Molar mass: 90.08g/mol) with NaOH is:

H₃C-CH(OH)-COOH + NaOH → H₃C-CH(OH)-COO⁻ + Na⁺ + H₂O

<em>Where 1 mole of the acid reacts per mole of the base.</em>

<em />

You must know the student will reach equivalence point when moles of lactic acid = moles NaOH.

the student will titrate the 0.126g of H₃C-CH(OH)-COOH. In moles (Using molar mass) are:

0.126g ₓ (1mol / 90.08g) = <em>1.40x10⁻³ moles of H₃C-CH(OH)-COOH</em>

To reach equivalence point, the student must add 1.40x10⁻³ moles of NaOH. These moles comes from:

1.40x10⁻³ moles of NaOH ₓ (1L / 0.0500moles NaOH) = 0.0280L of the 0.0500M NaOH =

<h3>28.0mL of the 0.0500M NaOH solution</h3>
8 0
3 years ago
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