which of the following represents the atoms of 2 different elements?

Answer:

Substances that absorb energy in the form of heat are

b)endothermic.

hope it helps :)

Answer: There is no list in your question. But the three factors in which natural selection occurs are:

1. A struggle for existence,

2. Variation and

3. Inheritance

Explanation:

Darwin’s theory of natural selection is the way in which organisms change overtime.

These changes allow organisms to become better adapted to their environment and increase their chances for survival.

The three major factors through which natural selection occurs are:

1. A struggle for existence,

2. Variation and

3. Inheritance

Darwin’s theory of natural selection will occur if the three conditions above are met and unless these factors are in place, natural selection will not occur.

Answer: Well i think i have saw this i wolud say B hope this helps

Explanation:

Answer:

248.4 mL

Explanation:

In order to answer this problem we can use Boyle's law, which states that at a constant composition:

Where in this case:

We input the data:

And solve for V₂:

Answer:

b

Explanation:

Answer:

social facilitation

Explanation:

The glassware is cleaner when students wash it in front of their classmates is best explained by social facilitation. Hence, option A is correct.

Social facilitation is a psychological concept relating to the tendency for the presence of others to improve a person's performance on a task.

Social Loafing: When a person does not show much effort to achieve a goal when they work in a group than when they work alone.

Social Facilitation: When a person can do better at simple tasks when in the presence of other people.

So the first one is basically saying a person is less working when n a group of other and the second one is saying that this person can work on simple things when people are around.

Hence, the glassware is cleaner when students wash it in front of their classmates is best explained by social facilitation.

Learn more about social facilitation here:

https://brainly.com/question/46360

#SPJ2

Answer:

b

Explanation: because i took the test and got a 100

Answer:

the amount of soduim phosphate is will be 52 percemt

Answer:

hope it helps and thank you for the points

Answer:

mamamkalalllaamakkaoakmaa

Answer:

9.643×10^-4 mole is your answer

Explanation:

56 g of iron =1 mole

0.054 g of iron =1×0.054/56=9.643×10^-4 mole

Answer:

1

Explanation:

Molarity is simply defined as the mole of solute per unit litre of water. Mathematically, it can be expressed as:

[tex]Molarity = \frac{mole}{volume}[/tex]

With the above information in mind, we can obtain the molarity of the hydrochloric acid solution as follow:

Mole of HCl = 3 moles

Volume of water = 3 L

[tex]Molarity = \frac{mole}{volume}\\Molarity = \frac{3}{3}\\Molarity = 1 M[/tex]

Therefore, the molarity of the hydrochloric acid solution is 1 M.

Learn more: https://brainly.com/question/15012982

Answer:

2

Explanation:

The balanced chemical equation for this reaction is:

2Na + K2S → 2K + Na2S

Meaning the coefficient for potassium (K) is 2.

Answer:

2 / 1 => 2 / 1

Explanation:

octet is an atom or an ion having a maximum of eight electrons in the outermost shell while duplet is an atom having the maximum of two electrons in the outermost shell

Answer:

Gasoline

Explanation:

Coal, oil, and gas are all fossil fuels made from the remaisn of dead organisms.

Answer:

Elementary substance, since it is in the periodic table of elements.

Hope that helps!

-SCSB

Explanation:

Answer:

nitrogen in atmospheres of a sample is 0.679

Answer:71.25

Explanation:

The molar mass of a sample of gas that has a density of 2.85g/L at 101 kPa pressure and 29°C is 71.37  g mol⁻¹ and It can be solved using Ideal gas law.

The ideal gas law is an equation of state that describes ideal gases.

This equation of state relates a gas’s pressure, volume, temperature, and mass, and is very useful for describing how gases will behave in ideal conditions.

This is the most common equation of state for gases.

Ideal Gas equation ;

PV = nRT

Molar mass (Mm) = m /n

Where ;

we also know,

Density (D) = m / v

Where ;

Now, Putting the formula of Molar mass and Density in ideal gas equation we get ;

Molar mass = D RT/ P

Given ;

Putting all the values in  the above equation of molar mass ;

Molar mass = 2.85 x 0.0821 x 302 / 0.99

                    = 71.37  g mol⁻¹

Learn more about Ideal gas law here ;

https://brainly.com/question/13821925

#SPJ2

Answer:

[H]=10^-4 when ph=4 higher

[H]=10^-5 when ph =5 lower

Explanation:

brains

Answer:

B. Lava flows may cause tsunamis.

Answer:

4

Explanation:

Nitrogen-fixers are the critical links between atmospheric nitrogen and organisms that need nitrogen to survive.

Nitrogen fixers are the compounds which are used in the nitrogen fixation process to convert the nitrogen molecule in other nitrogenous compounds.

So, the nitrogen fixers converts the atmospheric nitrogen molecule (N₂) into the other compounds like ammonia (NH₃) or any other useful nitrogenous compounds which will be used or absorbed by the soil or any other aquatic species. Some examples of nitrogen fixers are bacteria, clostridium, rhizobium, and many more.

Hence option (A) is correct i.e. atmospheric nitrogen and organisms that need nitrogen to survive.

To know more about nitrogen fixers, visit the below link:
https://brainly.com/question/21040043

Answer:

this is a homework app, not a tell people to follow your ig app

Explanation: