How do collisions between molecules transfer energy from a system of
reacting substances to its surroundings?
A. They cause heat to flow from the system to the surroundings.
O B. They cause molecules to flow into the system from the
surroundings
C. They cause the potential energy of the system to increase
D. They cause the thermal energy of the surroundings to decrease.

Answer:

B. metamorphic

Explanation:

Rocks formed under high heat and pressure is essentially the definition of metamorphic rock :)

Answer:

more genetic variation within a population usually enables more phenotypic variation.

Explanation:

Because natural selection acts directly only on phenotypes,  Some new alleles increase an organism's ability to survive and reproduce, which then ensures the survival of the allele in the population.

Genetic variation lets the organisms survive long term as it increases the phenotypic and the genotypic variation.  Genetic variation is due to the type of reproduction that involves two parents.

Genetic variation is the modification of the original genome of the organism by genetic recombination and mutation that can be beneficial in the survival and the natural selection process.

Reproduction involving two parents of the same species allow genetic variation as the process of independent assortment and crossing over of the chromosomes inherited from both creates species with different traits and genotype.

Therefore, the reproduction involving two parents results in genetic variation.

Learn more about genetic variation here:

https://brainly.com/question/20665733

#SPJ2

Answer:

Explanation: I did the work online because I just worked on this.

Answer:

ionic, they would make an ion

Explanation:

Answer:

Physicians do not have to treat every ill patient. However they must uphold their ethics (eg. do no harm, confidentiatlity, etc.).

Explanation:

Primary source:

Hippocratic Oath (translation since it's originally in Greek)

I swear by Apollo the physician, and Asclepius, and Hygieia and Panacea and all the gods and goddesses as my witnesses, that, according to my ability and judgement, I will keep this Oath and this contract:

To hold him who taught me this art equally dear to me as my parents, to be a partner in life with him, and to fulfill his needs when required; to look upon his offspring as equals to my own siblings, and to teach them this art, if they shall wish to learn it, without fee or contract; and that by the set rules, lectures, and every other mode of instruction, I will impart a knowledge of the art to my own sons, and those of my teachers, and to students bound by this contract and having sworn this Oath to the law of medicine, but to no others.

I will use those dietary regimens which will benefit my patients according to my greatest ability and judgement, and I will do no harm or injustice to them.

I will not give a lethal drug to anyone if I am asked, nor will I advise such a plan; and similarly I will not give a woman a pessary to cause an abortion.

In purity and according to divine law will I carry out my life and my art.

I will not use the knife, even upon those suffering from stones, but I will leave this to those who are trained in this craft.

Into whatever homes I go, I will enter them for the benefit of the sick, avoiding any voluntary act of impropriety or corruption, including the seduction of women or men, whether they are free men or slaves.

Whatever I see or hear in the lives of my patients, whether in connection with my professional practice or not, which ought not to be spoken of outside, I will keep secret, as considering all such things to be private.

So long as I maintain this Oath faithfully and without corruption, may it be granted to me to partake of life fully and the practice of my art, gaining the respect of all men for all time. However, should I transgress this Oath and violate it, may the opposite be my fate.

Answer:

The circulatory system brings blood through the kidneys where nitrogenous wastes can be filtered. The urinary system helps the circulatory system by maintaining salt balance in the body and adjusting blood pressure by getting rid of or holding on to more water.

Explanation:

Answer:

Shielding effect is the decrease in the attractive force of the nucleus on tge valence electrons due to inner shell electrons. ... Shielding effect remains same across a period, that is because the number of shells are same for each element in a period. hope this helps!

Answer:

Thx Have a fantastic day! :)

Explanation:

Answer:

COAL

Explanation:

Answer:

Coal!

Explanation:

Hope this helps!

Answer:

3(NH4)2S + 2AlCl3 → 6NH4Cl + Al2S3

Explanation:

Firstly, ammonium sulfide has a chemical formula of (NH4)2S while aluminum chloride has a chemical formula of AlCl3. These two chemical substances react as follows:

(NH4)2S + AlCl3 → NH4Cl + Al2S3

This chemical equation is however, unbalanced. To balance the chemical equation, one has to ensure that the atoms of each element on both the reactant and product side equates with one another.

If we carefully observe each atom on both the reactants and product side, we will have the following balanced equation:

3(NH4)2S + 2AlCl3 → 6NH4Cl + Al2S3

That is;

- 6 moles of N and Cl on both sides

- 24 moles of H on both sides

- 3 moles of S on both sides

- 2 moles of Al on both sides

Answer:

A dipole exists when there are areas of asymmetrical positive and negative charges in a molecule. Dipole moments increase with ionic bond character and decrease with covalent bond character.

Answer:

The difference between normal salt and acid salt is that acid salt is basically made up of strong acid and also including a weak base. However normal salt is practically made up of strong base or even a weak acid and also a weak base. Acid salt or in a more logical term known as acidic salt ionises into a type of form of H + ions which is more than OH- ions, which is in a water solution. But even than normal salt ionises into a form of eqaul number of H+ ions and OH- ions in this so called water solution.

Answer:

Oxides are chemical compounds with one or more oxygen atoms combined with another element (e.g. Li2O). Oxides are binary compounds of oxygen with another element, e.g., CO2, SO2, CaO, CO, ZnO, BaO2, H2O, etc. These are termed as oxides because here, oxygen is in combination with only one element.

Explanation:

Answer:

Oxides are chemical compounds with one or more oxygen atoms combined with another element (e.g. Li2O). Oxides are binary compounds of oxygen with another element, e.g., CO2, SO2, CaO, CO, ZnO, BaO2, H2O, etc. These are termed oxides because here, oxygen is in combination with only one element.

Answer:

do u take links bcs I can give u one with the answer?

The approximate initial boiling point of Magnesium chloride solution has been 102.33 degree Celsius.

The pure water has boiling point 100 degree Celsius. With the addition of the solvent, the boiling point has been increased. The change in the boiling point ([tex]\Delta T_b[/tex]) has been given as:

[tex]\Delta T_b=i.K_b.b[/tex]

Where, i has been the van't Hoff factor

[tex]K_b[/tex] has been the ebullioscopic constant

b has been the molality of the sample

The dissolution of magnesium chloride in water has been given as:

[tex]\rm MgCl_2\;(aq)\;\rightarrow\;Mg^2^+\;+\;2\;Cl^-[/tex]

The i has been the amount of molecules that has been formed by the dissociation of 1 molecule. The dissociation of Magnesium chloride has been resulted in the 1 Mg and 2 Cl. Thus, the i for Magnesium chloride has been 3.

The molality (m) of the solution has been given as:

[tex]m = \dfrac{m_s_o_l_u_t_e}{mwt}\;\times\;\dfrac{1000}{m_s_o_l_v_e_n_t}[/tex]

Where, [tex]m_s_o_l_u_t_e=285\;\text {g}\\m_s_o_l_v_e_n_t=2\;\text{kg}\\mwt=95.211\;\text{g/mol}[/tex]

Substituting the values, molality of the Magnesium chloride solution (b) can be given as:

[tex]b=\dfrac{285}{95.211}\;\times\;\dfrac{1}{2}\;\text{m}\\b=1.49\;\text{m}[/tex]

The molality of the solution has been 1.49 m.

Substituting the values for change in temperature:

[tex]\Delta T_b=3\;\times\;0.52\;\times\;1.49\;^\circ \text C\\\Delta T_b=2.33\;^\circ \text C[/tex]

The rise in boiling temperature with the addition of 285 g of Magnesium chloride has been 2.33 [tex]\rm ^\circ C[/tex]. Since, the initial temperature for pure solvent has been 100 degree Celsius.

The initial temperature of Magnesium chloride solution has been the sum of two. Thus:

[tex]\text {Initial temperature}=100^\circ \text C\;+\;2.33\;^\circ \text C\\\rm Initial\;temperature=102.33\;^\circ C[/tex]

The initial temperature of magnesium chloride solution has been 102.33 degree Celsius.

For more information about the boiling point, refer to the link:

https://brainly.com/question/2153588

Answer:

A. The rate of the backward reaction increases.

Explanation:

The stress caused by increasing the H2O concentration would shift the system to the left, producing more reactants to counter the stress of added H2O. This means the rate of the backward reaction would increase.

Answer:

A

Explanation:

just took the test

Answer: C) 1.6

Explanation: I got it right

Answer:

It will freeze or melt

Explanation:

Ice will melt if energy added

Water will freeze if energy removed

Answer:

2.8 m

Explanation:

:)

Answer: Average speed for the first two hours was 70 km/hr

Covered 400 km in the last four hours

Average speed for the rest of the journey was 100 km/hr

Explanation: 140 km / 2 hours = 70 km/hr

540 km - 140 km = 400 km remaining for the last four hours

400 km / 4 hours = 100 km/hr for the last four hours

Explanation:

Information Technology CBSE Code 402 for class IX and X is based on National Skills Qualifications Framework. The book is designed and structured to help learner acquire the knowledge and skills regarding conputers, office productivity tools and internet necessary in real life competitive worlf

The group of choices associated with the given question are as follows:

Organisms once thought to be unrelated may be found to be related.

Mode of nutrition of some organisms may change.

Organisms that do not have a backbone may develop one.

All multicellular organisms may be found to be prokaryotes

Answer:

The correct answer would be - Organisms once thought to be unrelated may be found to be related

Explanation:

Classification of the organisms is based on the shared characteristics and structural or environmental similarities of the organisms which are modified and evolved during the period of time. It is also known as life sciences evolve and genetic code provides more accurate information.

These evolutionary changes and will lead to certain organisms that are once thought to be unrelated organisms that may actually be related based on a genetic code. These codes have every small and accurate change that occurs and can also find out when these changes occured.

Answer:

a that all you need and why you just and use a calculators and what they are for