CHEMISTRY MIDDLE SCHOOL

An increase in temperature of ten degrees Celsius will have what effect on the rate?

Answers

Answer 1
Answer:

An increase in temperature will increase the reaction rate because:

There are large increase in the number of high energy collisions which results in doubling the rate of reaction.

Effect of temperature on the rate:

The pace of response increments by expanding the temperature. The response rate is multiplied at room temperature for each 10°C. As the temperature builds, the degrees will likewise change slowly.

By expanding the collision frequency, we can build the pace of response. Impact happens just when the particles respond.

The particles will move quicker when you heat the substance and impact. This will assists with speeding the pace of response.

Find more information about rate here:

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Answer 2
Answer:

An increase in temperature will increase the reaction rate because of a large increase in the number of high energy collisions which results in doubling the rate of reaction.

Explanation:

  • The rate of reaction increases by increasing the temperature. The reaction rate is doubled at room temperature for every 10°C. As the temperature increases, the degrees will also change gradually.
  • By increasing the collision frequency, we can increase the rate of reaction. Collision takes place only when the particles react.
  • The particles will move faster when you heat the substance and collide. This will helps to speed the rate of reaction.

Related Questions

HIGH SCHOOL

Reducing the volume of a contained gas by one third, while holding temperature constant, causes pressure to A. be decreased by two thirds. B. be increased by two thirds. C. be decreased by one third. D. be increased by one third

Answers

Reducing the volume of contained gas by one third, while holding temperature constant, causes pressure to D. be increased by one third
HIGH SCHOOL

An ion of oxygen contains eight protons and has a charge of 2-. What must occur for this ion to become a neutral oxygen atom? Group of answer choices It must lose two electrons.
It must gain two protons.
It must gain two electrons.
It must lose two protons.

Answers

Answer : The correct option is, It must lose two electrons.

Explanation :

Atomic number is defined as the number of protons or electrons that are present in a neutral atom.

Atomic number = number of protons = number of electrons

For the neutral atom, the number of protons and electrons are equal. But, they are unequal when the atoms present in the form of ions or the atom has some charge.

An ion is formed when an atom looses or gains electron.

When an atom looses electrons, it will form a positive ion known as cation.

When an atom gains electrons, it will form a negative ion known as anion.

As per question,

An ion of oxygen contains 8 protons and has a charge of (2-). If this ion to become a neutral oxygen atom then it must lose two electrons.

Hence, the correct option is, It must lose two electrons.

Answer:

Lose two electrons or 2 negative charges

Explanation:

HIGH SCHOOL

Help please! Which of the following is true for compounds?

A.They can consist of no more than two types of elements.
B. They can be created by chemical reactions.
C. They all have the same properties regardless of their elemental composition.
D.They can be separated into their component elements through physical means.

Answers

The answer is B. They can be created by chemical reactions.

A compound is a substance composed of two or more different atoms chemically bonded to one another, for example, water (H₂O) consists of 2 atoms of hydrogen (H) and 1 atom of oxygen (O), so it is the compound. Water is created by chemical reaction:

2H₂ + O₂ → 2H₂O

HIGH SCHOOL

Based upon the valence numbers of the elements magnesium (2) and hydrogen (1), predict how many covalent bonds would form between these atoms to achieve the full complement of electrons in their outermost energy shells. based upon the valence numbers of the elements magnesium (2) and hydrogen (1), predict how many covalent bonds would form between these atoms to achieve the full complement of electrons in their outermost energy shells. one two three four

Answers

Magnesium is in the second group in the periodic table, which means that its outer shell is an s-orbital which contains 2 valence electrons.

Hydrogen also has an s-orbital as an outer shell but it only contains 1 valence electron. The electron dot diagram would look like this:

H· ·Mg· ·H

Each hydrogen shares one electron with magnesium and the magnesium shares one of its electrons with each hydrogen resulting in two covalent bonds.

H:Mg:H and this gives us the compounds MgH₂
MIDDLE SCHOOL

Which answer is a scientifically accurate description of velocity? A. The yacht traveled from the dock north to the 200-meter marker in the bay in less than 5 minutes, giving the passengers several more hours to fish.

B. The motorcyclist traveled southeast along a highway at 55 mph and reached the campsite in less than the two-hour estimated time.

C. The hiker began hiking the park's five-mile north hiking trail at 8:00 a.m. with plenty of daylight left to complete the hike before dark.

D. Walking south along the two-mile canyon trail generally takes less time than traveling the same trail north because walking south is all downhill.

Answers

Answer:

B. The motorcyclist traveled southeast along a highway at 55 mph and reached the campsite in less than the two-hour estimated time.

Explanation:

Velocity is the rate at which an object changes position in a specific direction. It has both magnitude and direction.

Travelling southeast at 55 mph is a velocity. It gives both speed and direction.

Statements A., B., and C. give the direction but not the speed.

Answer: The answer is B I think I'm in the middle of the test.

Explanation:

HIGH SCHOOL

Is this statement true or false? Oil and natural gas are fuel resources harvested from the ocean.

Answers

Answer:

This statement is true.

Explanation:
  • Oil and natural gas are fuel resources harvested from the ocean.
  • Gas and oil form in the sea over a period of millions of years, as the remains of animals and plants sink to the ocean floor.
  • Combined with particles flushed from the land, they are buried and compressed into layers of sediment several kilometers thick on the ocean floor.
  • Then by different procedures, these remains converts to oil and gas.
  • Which are mostly in the bottom of oceans.

Oil and natural gas are fuel resources harvested from the ocean.

The answer is true.

MIDDLE SCHOOL

How does the level of organization relate to cells? To organ systems?

Answers

Cells make up tissues, Tissues make up Organs, and Organs make up Organ Systems.

The cell is the most basic functional, structural and biological unit of all living organisms; it is the smallest unit of life and the foundational block from which other systems are built. In multi cellular organisms, cells that perform similar functions usually come together to form tissues. Similar tissues then come together to form organs. Organs refers to group of tissues that have specific functions. Related organs finally come together to form organ systems. Organ systems refers to group of organs that work together to carry out complex functions. Thus, in multi cellular organisms, the organization of cells include: cells, tissues, organs and organ system.

COLLEGE

Fructose-2,6-bisphosphate is a regulator of both glycolysis and gluconeogenesis for the phosphofructokinase reaction of glycolysis and the fructose-1,6-bisphosphatase reaction of gluconeogenesis. In turn, the concentration of fructose-2,6-bisphosphate is regulated by many hormones, second messengers, and enzymes. How do the following affect glycolysis and gluconeogenesis?

Answers

Answer: Glycolysis is stimulated by a high concentration of fructose-2,6-bisphosphate, and the gluconeogenesis is stimulated by a low concentration of fructose-2,6-bisphosphate.

Explanation: Fructose-2, 6-bisphosphate (F2, 6P) is an allosteric activator of the key enzyme in the glycolysis cycle, phosphofructokinase (PFK). F2, 6P also acts as an inhibitor of fructose bisphosphate phosphatase (FBPase) in gluconeogenesis. The concentration of F2, 6P is governed by the balance between its synthesis and breakdown, catalysed by phosphofructokinase-2 (PFK-2) and fructose-bisphosphatase-2 (FBPase-2), respectively. These enzymes are found in a dimeric protein and are controlled by a phosphorylation/dephosphorylation mechanisms. Phosphorylation of the dimeric protein results in an increased concentration of FBPase-2, leading to a decreased concentration of F2, 6P, thus activating the gluconeogenesis cycle. The concentration of PFK-2 is increased when the dephosphorylation of the dimeric protein takes place, leading to the increased concentration of F2, 6P, thus stimulating glycolysis cycle.

HIGH SCHOOL

Half-life problems: (a) Hg-197 has a half-life of 64 hours. If you have 164g of Hg-197 today, how much will you have in 448 hours?


(b) 263 minutes ago we had 5.12g of I-134 and now we only have 0.16g. How long is the half-life of I-134?



(c) C-14 has a half-life of 5730 years. If animal remains are found to have 1/16 of the amount of C-14 found in animals living today, how old are the remains?




(d) An average smoke detector for domestic use contains about 0.29 micrograms of
Am-241 which has a half-life of 432 years. How long would it take to decay to 0.0725 micrograms? (3 pts)

Answers

Answer:

A) answer 1.281 grams

B) 52.60 days

C) 23250 years  

D)  864 years  

Explanation:

A) Solution

Ending Amount = Beginning Amount / 2(time / half-life)

Ending Amount = 164 / 2(⁴⁴⁸/⁶⁴)

Ending Amount = 164 / 2⁷

Ending Amount = 164 / 128

Ending Amount = 1.281 grams

B) solution

Half life = (time * log 2) / log (beginning amount / ending amount)

Half life = (263 * .30103) / log (5.12 / 0.16)

Half life = 79.17 / log (32)

Half life = 79.17 / 1.505

Half life =  52.60 days

C) Solution

As we have half-life =5730  

1/16 =  6.2 percent  

Remains =    23250 years  

D) solution

elapsed time = half life * log (beginning amount / ending amount) / log 2

elapsed time = 432 * (log (0.29 / 0.0725) / .30103)

elapsed time = 432 * (0.602 / .30103)

elapsed time=  432 (2)

= 864 years  

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