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Elza [17]
3 years ago
5

___________________is the rate that an object moves in a certain direction. Question 3 options:

Chemistry
1 answer:
Nesterboy [21]3 years ago
3 0

Answer: Velocity

Explanation:

i just took the quiz for k12

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1. Define the units for molarity. Page |152 Exp. 14 pH and Solutions Pre Lab Questions (1 of 1) 2. A solution contains 5.25 gram
Ne4ueva [31]

Answer:

1. mol/L

2. 0.120 M

Explanation:

1. Molarity is equal to the moles of solute divided by the liters of solution. The units of molarity are mol/L.

2.

Step 1: Given data

  • Mass of sodium chloride (solute): 5.25 g
  • Volume of solution (V): 750.0 mL = 0.7500 L

Step 2: Calculate the moles of solute (n)

The molar mass of NaCl is 58.44 g/mol.

n = 5.25 g × 1 mol/58.44 g = 0.0898 mol

Step 3: Determine the molarity of the solution

We will use the definition of molarity

M = n/V

M = 0.0898 mol / 0.7500 L = 0.120 M

7 0
3 years ago
Sơ đồ tư duy hóa sinh protein
Lesechka [4]
<h2>\huge\tt\red{ANSWER}</h2>

  • Nhờ quá trình tiêu hoá thức ăn, protein được phân giải thành nhiều loại acid amin riêng rẻ.

3 0
2 years ago
Consider the following chemical reaction of bromothymol blue indicator. It appears yellow in undissociated form and blue in its
TiliK225 [7]

The addition of hydrogen carbonate to bromothymol blue turns the solution blue. Thus, option B is correct.

The balanced equation for the dissociation of bromothymol blue is:

\rm HC_2H_3O_2\;\leftrightharpoons H^+\;+\;C_2H_3O_2^-

The color of dissociated form is yellow and undissociated form is blue.

<h3>What is the final color of solution?</h3>

The addition of hydrogen carbonate results in the dissociated ions as:

\rm H_2CO_3\;\rightarrow\;2\;H^+\;+\;CO_3^-

The dissociation results in the increased hydrogen ion concentration. The undissociated form in the reaction mixture increases.

Thus, the color of the solution will turn blue. Hence, option B is correct.

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6 0
2 years ago
What is 5 time 25 . .
daser333 [38]

One Hundred and twenty-five

6 0
3 years ago
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What evidence do you have that tpgs-750m increases the reaction rate? How does tpgs-750m act to increase the reaction rate?
notka56 [123]

TPGS-750 M conducts reaction under lower temperature then the reactions carried out in organic solvents.

<h3>What is tpgs-750m ?</h3>

It is a chemical molecule of the second generation known as an amphiphile, with both hydrophilic and lipophilic qualities.

  • In contrast to any other organic solvent, water is used for transition metal catalysed cross-coupling, making TPGS-750M a second generation surfactant with physical features that encourage this process.

  • The hydrophilic portion of TPGS-750M, which is utilised in medicine, is made of Poly(ethylene glycol), and the hydrophobic portion is made of the vitamin E compound alpha-tocopherol.

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