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miss Akunina [59]
3 years ago
10

About how long ago did our solar system start to form?

Biology
1 answer:
Darya [45]3 years ago
6 0

Answer:

about 5 billion years ago

Explanation:

Our solar system formed about 5 billion years a go from a dense cloud of interstellar gas and dust.

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What mass of oxygen reacts when 4.50 moles of water are produced?
denis23 [38]

Answer:

120 g

Explanation:

mass of reactants+ mass of products=one mole of oxygen= 120 g

6 0
2 years ago
Know what makes a solution acidic or basic (the pH number and the ions).
Brrunno [24]

To determine whether an acidic or basic solution, it is first necessary to compare the concentrations of the hydronium (H3O +) and hydroxide (OH-) ions in the solution.

In acidic solution, the concentration of H3O + ions is higher than that of OH- ions.

  • In acidic solution, the concentration of H3O + ions is higher than that of OH- ions. Such a solution can be achieved by adding a small part of the H3O + ions, for example. Acid solutions have a pH below 7, the further away from 7 the pH of the solution is the higher its acidity content.  According to Le Chatelier's principle, when a disturbance is caused to an equilibrium system, it tends to readjust in order to diminish the effects of that force. This means that if an acid is added to water, the H3O + ions will be in excess and the equilibrium will shift in the opposite direction to the left. Then these excess ions will react with the OH- ions. Thus, the concentration of OH- ions will decrease and the solution will become acidic.
  • In basic solutions, the concentration of OH- ions is higher than that of H3O + ions.  If we add a base to the water, it means that we will be adding OH- ions and, as explained in the previous section, by Le Chatelier's principle, the equilibrium of the water selfionization reaction will shift in the opposite direction, and the excess ions will react. with the H3O + ions, decreasing their concentration and making the basic solution.  Basic solutions have a pH greater than 7, the farther from 7 and closer to 14 the pH of the solution, the higher the basification content.

8 0
2 years ago
How could this statement be revised to make it a hypothesis? Fish meal is safer than artificial fertilizers, but it does not mak
Triss [41]

Just take out the fluff.

Plants that are fertilized with fish meal will be healthier for plants than the plants that receive artificial fertilizer.

Or make one of those If, Then, Because statements.

If a plant is fertilized with fish meal rather than artificial fertilizer, then the plants will be overall healthier because fish meal is natural compared to the artificial fertilizer.

3 0
3 years ago
Read 2 more answers
Growth factors and cytokines both lead to tyrosine phosphorylation through receptors, but they do so through different mechanism
gladu [14]

Answer:

The growth factor receptors have a kinase domain while the Cytokines receptors do not contain a kinase domain as part of their structure.

Explanation:

The two are signaling molecules that control cell activities in some manners, such paracrine, endocrine and autocrine manners.

The receptor kinase domain can be specific for substrate sites in which phosphorylation occurs.

3 0
3 years ago
Which explanation is most likely the reason for the evolution of a larger brain in humans? The size of the human brain increases
SCORPION-xisa [38]

Across nearly seven million years, the human brain has tripled in size. The most likely the reason for the evolution of a larger brain in humans is that a larger brain allows humans to solve complex problems. Large, complex brains  enable humans to process and store a lot of information and to interact with each other and with their surroundings better. The  brain we now humans have is the largest and most complex of any living primate.

5 0
3 years ago
Read 2 more answers
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