CHEMISTRY HIGH SCHOOL

The rate law for a reaction is rate = k[A]2. What is the overall order of this reaction, and which two varaibles, when graphed, will give a straight line for this reaction? A. first order, In[A]t versus t B. first order, 1/[A]t versus t C. second order, In[A]t versus t D. second order, 1/[A]t versus t

Answers

Answer 1
Answer:

Answer:

D. second order, 1/[A]t versus t

Explanation:

Since the power of the concentration is 2 in the rate law, it is a second order reaction. Also, for a second order reaction, the variables that would yield a straight line when graphed are 1/[A]t versus t

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Determine the molarity of a solution made by dissolving 13.8 g of sodium chloride in enough water to make 750.0 mL of solution. (The MM of NaCl is 58.44 g/mol)
1. Gas Formula Helium He Methane CHA Oxygen 0₂ Nitrogen N₂ Chlorine Cl₂ Relative atomic or molecular mass 4 ,16, 32 ,28 ,71 Look at the table and answer the following questions. (a) Which two gases will mix fastest? (b) Which gas will take least time to escape from gas syringe? (c) Which gas will diffuse slowest and why? Or (c) An unknown gas diffuses faster than 0₂ and slower than N₂, what can you about its molecular mass?​
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What is the main product of the calvin cycle?
Which of the following types of mixtures exhibit the Tyndall effect?a. solutions c. colloids b. suspensions d. none of the above

Why is salt put on icy roads and sidewalks in the winter?

Answers

so that ice would not melts and it helps to keep grip for walking or driving

Light can penetrate to only a depth of between 50 and 100 m in most ocean water. what effect does tsh have on the water's oxygen concentration?explain

Answers

This means that waters at these depths will have a higher concentration of oxygen than deeper waters where the light rays cannot reach. This is because phytoplantons will be found in photic zones in the oceans. Therefore, these photosythetic organisms produce oxygen as a byproduct of photosythesis and use up carbon dioxide.

Light penetration plays a crucial role in the oxygen concentration in the ocean. Light can penetrate up to 50 to 100 meters of the ocean water, leaving high concentration of oxygen at ocean's depth.

The deep oceans are high in the concentration of oxygen. The rates of consumption of oxygen at such depth are low. The phytoplanktons are found in the photic zones of oceans, where these organisms perform photosynthesis. Phytoplanktons are not observed in the deep layers of ocean, therefore, the oxygen consumption will be low. The photosynthetic organisms yield oxygen as a by product, and use up carbon dioxide.

Therefore, the oxygen concentration at deep ocean levels will be higher.

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Atomic emission spectra are produced when the light emitted by an element passes through a prism. Which of the following statements is true regarding these spectra?A. All elements produce the same atomic spectra.
B. Elements produce continuous spectra.
C. Elements produce spectra with only a few distinct lines.

Answers

Option C: elements produce spectra with only few distinct lines.

The spectra are not continuos and are different for every element. This permits to identify elements.

Final answer:

Atomic emission spectra are unique to each element and consist of distinct lines representing different energy levels.

Explanation:

The correct statement regarding atomic emission spectra is option C: Elements produce spectra with only a few distinct lines.

  1. The spectra produced by different elements are unique to each element, meaning that they have distinct patterns of lines.
  2. These lines represent the different energy levels that electrons can occupy within the atom.
  3. The specific pattern of lines in an atomic emission spectrum can be used to identify the element present in a sample of unknown composition.

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According to Table F, which compound is soluble in water?(1) barium phosphate (3) silver iodide
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Answers

The answer is (4). All compounds of sodium and of perchlorate are soluble in water.

Answer: 4 sodium perchlorate

Explanation:

The science of using tree rings to determine absolute age is calleda. disconformity.
b. radiometric dating.
c. dendrochronology.
d. radioactive dating.

Answers

Option c. dendrochronology

tree rings or dendrochronology they allow to use it in calibration for carbon-14 on temporal placements of fragments of wood (from long dead trees).

Example Bristle cone pines (1957) 4723 years old
The best answer to the question that is being presented above would be letter c. Dendochronology is the science of using tree rings to determine absolute age. All the others are other forms of dating that would determine the tree's age.

How would one convert 36 yd to centimeters 2.54 cm = 1 in)?​

Answers

D is the correct process to convert 36 yds to centimetres 2.54 cm = 1 in.

What are centimetres?

A metric unit of length, equal to one-hundredth of a metre.

To convert a yard measurement to a centimetre measurement, multiply the length by the conversion ratio. The length in centimeters is equal to the yards multiplied by 91.44.

D is the correct process to convert 36 yds to centimetres 2.54 cm = 1 in.

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Answer:

D

Explanation:

A P E X
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