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Sauron [17]
3 years ago
10

Which process maintains homeostasis by replacing cells that die or get damaged? A. Cell division B. Cell respiration C. Exceptio

n D. Photosynthesis
Chemistry
1 answer:
aleksandr82 [10.1K]3 years ago
7 0

Answer:

Cell division

Explanation:

  • Cell division helps maintain homeostasis in living things since it creates new cells which can be used for growth and repair.
  • <em><u>Cell division occurs into two types, meiosis and mitosis . During mitosis, the cell creates two identical daughter cells that are identical to the parent cell, in terms of the number of chromosomes.</u></em>
  • These new cells are necessary to replace old cells that die in the organism, or to repair damage to the body.
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Suppose that 25.0 mL of 0.10 M CH3COOH (aq) is titrated with 0.10 M NaOH (aq). What is the pH after the addition of 10.0 mL of 0
olya-2409 [2.1K]

Answer:

pH=-1.37

Explanation:

We are given that 25 mL of 0.10 M CH_3COOH is titrated with 0.10 M NaOH(aq).

We have to find the pH of solution

Volume of CH_3COOH=25mL=0.025 L

Volume of NaoH=0.01 L

Volume of solution =25 +10=35 mL=\frac{35}{1000}=0.035 L

Because 1 L=1000 mL

Molarity of NaOH=Concentration OH-=0.10M

Concentration of H+= Molarity of CH_3COOH=0.10 M

Number of moles of H+=Molarity multiply by volume of given acid

Number of moles of H+=0.10\times 0.025=0.0025 moles

Number of moles of OH^-=0.10\times 0.01=0.001mole

Number of moles of H+ remaining after adding 10 mL base = 0.0025-0.001=0.0015 moles

Concentration of H+=\frac{0.0015}{0.035}=4.28\times 10^{-2} m/L

pH=-log [H+]=-log [4.28\times 10^{-2}]=-log4.28+2 log 10=-0.631+2

pH=-1.37

6 0
3 years ago
The atmospheric pressure in Denver, Colorado, is usually about 84.00 kPa. What is this pressure in atm and torr units?
tresset_1 [31]

Answer:

<u>84.00 kPa = 630.084 torr</u>

Formula for kPa to torr: For an approximate result, multiply the pressure value by 7.501. <em><u>84* 7.501</u></em>

<u>84.00 kPa = 0.831683168 atm</u>

Formula for kPa to atm: for an approximate result, divide the pressure value by 101. <em><u>84/101</u></em>

7 0
2 years ago
Calculate the molar mass for each of the following:
Mila [183]

Answer: a . 152g/mol  b. 102g/mol c. 183g/mol

Explanation:

By stating the atomic masses of each element in the questions, we have;

Fe= 56, S= 32, O= 16, Al = 27, C = 12, H =1 , N = 14, therefore

(a). FeSO4 =  56 + 32 + (16 x 4) =  152g/mol

(b). Al2O3 =  (27 x 2) + (16 x 3) = 102g/mol

(c). C7H5NO3S ( Saccharin, an artificial Sweetner) =

   (12 x 7) + (1 x 5) + 14 + (16 x 3) + 32 =  183g/mol

3 0
3 years ago
How many electrons are in an atom that has 25 protons and has an ion charge of negative 3
olya-2409 [2.1K]

Answer:

7

Explanation:

3x6=18 leavig 7 behind

6 0
2 years ago
A reaction has a ΔH value of +120 kJ and a ΔS value of -42 J/K. At which of the following temperatures is the reaction spontaneo
ollegr [7]

Answer:

the reaction is spontaneous at T > 2900 K

Explanation:

  • ΔG = ΔH - TΔS

∴ ΔH = +120 KJ

∴ ΔS = (-42 J/K)*(KJ/1000 J) = -0.042 KJ/K

∴ ΔG < 0 ⇒ the reaction is spontaneous

⇒ at T = 2900 K:

⇒ ΔG = 120 - (2900)(-0.042) = 120 - 121.8 = - 1.8 KJ < 0

6 0
3 years ago
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