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Setler79 [48]
3 years ago
11

Can someone help me with this chart it’s about waves. Questions 12-16

Biology
1 answer:
timofeeve [1]3 years ago
6 0
Science has shown that smoking causes cancer. which is an example of how society responded to this information
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According to the phylogeny tree, which two phyla are most closely related?
bonufazy [111]
The answer I came up with is Echinoderms and Chordates.

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8 0
3 years ago
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____are compounds that produce H+ ions in solution.
kap26 [50]

Answer:

An acid is a substance or compound that releases hydrogen ions (H+) when in solution. In a strong acid, such as hydrochloric acid (HCl), all hydrogen ions (H+), and chloride ions (Cl-) dissociate (separate) when placed in water and these ions are no longer held together by ionic bonding.

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3 years ago
The minimum amount of energy needed to start a chemical reaction is known as:
nadya68 [22]

Answer:

The correct option is B. Activation energy

Explanation:

The activation energy is usually used to designate the minimum energy necessary for a given chemical reaction to occur, that is, the basic requirement for the reaction to proceed.

For a reaction to occur between two molecules, they must collide in the correct orientation and have a minimum amount of energy. As the molecules approach, their electron clouds are rejected. This requires energy (activation energy) and comes from the heat of the system, that, is, from translational, vibrational energy, etc of each molecule. If the energy is sufficient, the repulsion is overcome and the molecules are close enough for a rearrangement of the bonds of the molecules.

The concept of Activation energy was introduced by Arrhenius in 1889. Arrhenius suggested that molecules must prossess a minimum amount of energy to react. That energy comes from the kinetic energy of the clliding molecules. Kinetic energy serves to cause reactions, but if the molecules move very slowly, the molecules will only bounce when they collide with other molecules and the reaction does not happen. In order for the molecules to react, they must have a total kinetic energy that is equal to or greater than a certain minimum value of energy called activation energy.

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3 years ago
Climate Change: Who Should Pay for the Consequences?
irga5000 [103]
Factory’s should pay the price
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Which supercontinents were present on Earth at the beginning of the Cretaceous period?
rosijanka [135]

Answer:

Explanation:the answer is not B since it's also asking for more then one continent in the question

4 0
3 years ago
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