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Aloiza [94]
4 years ago
14

What is conserved in physical changes

Chemistry
2 answers:
nataly862011 [7]4 years ago
8 0

Answer:

energy or density

Explanation:

Sav [38]4 years ago
6 0
B. Energy

because energy is the physical changes considering it is all around us
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Which of the following best describes the overall purpose of cellular respiration?
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The overall process of cellular respiration is to use the energy or ATP in the sugars in your body, to supply your cells with with oxygen and water.
5 0
3 years ago
Determine the moles of chlorine needed to react with 38.9 of iron (III) chloride.
lys-0071 [83]

Answer: 0.360 moles

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}

\text{Moles of} FeCl_3=\frac{38.9g}{162.2g/mol}=0.240moles

The balanced chemical reaction is:

2Fe+3Cl_2\rightarrow 2FeCl_3  

According to stoichiometry :

2 moles of require = 3 moles of

Thus 0.240 moles of FeCl_3 will require=\frac{3}{2}\times 0.240=0.360moles of Cl_2

Thus 0.360 moles of chlorine needed to react to produce 38.9 of iron (III) chloride.

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3 years ago
What important substances do plants produce during photosynthesis?
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7 0
3 years ago
Read 2 more answers
2. Suppose that 21.37 mL of NaOH is needed to titrate 10.00 mL of 0.1450 M H2SO4 solution.
AysviL [449]

Answer:

0.1357 M

Explanation:

(a) The balanced reaction is shown below as:

2NaOH+H_2SO_4\rightarrow Na_2SO_4+2H_2O

(b) Moles of H_2SO_4 can be calculated as:

Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}

Or,

Moles =Molarity \times {Volume\ of\ the\ solution}

Given :

For H_2SO_4 :

Molarity = 0.1450 M

Volume = 10.00 mL

The conversion of mL to L is shown below:

1 mL = 10⁻³ L

Thus, volume = 10×10⁻³ L

Thus, moles of H_2SO_4 :

Moles=0.1450 \times {10\times 10^{-3}}\ moles

Moles of H_2SO_4  = 0.00145 moles

From the reaction,

1 mole of H_2SO_4 react with 2 moles of NaOH

0.00145 mole of H_2SO_4 react with 2*0.00145 mole of NaOH

Moles of NaOH = 0.0029 moles

Volume = 21.37 mL = 21.37×10⁻³ L

Molarity = Moles / Volume = 0.0029 /  21.37×10⁻³  M = 0.1357 M

7 0
3 years ago
The energy of flowing electrons
Komok [63]

Answer:

C. ElectricalElectrical

Explanation:

( it might be wrong pls dont report me just let me kno y its wrong )

7 0
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