Balance the equation:
GC2MmCh2

—
the 2 is a subscript (small)

Answer:

The answer to your question is ∆Hrxm= – 23.9 kJ

N = n x No

n = N/No

No = avogadro's number, 6.02 x 10²³

[tex]\tt \dfrac{3.45\times 10^{23}}{6.02\times 10^{23}}=0.573[/tex]

The density has been given as the mass of the substance per volume of the solution. The mass of citric acid in the bottle has been 1.22 grams.

Percent mass can be given as the mass of substance in the total mass of the solution.

The volume of the face serum has been 250 mL, and the density is 0.979 g/mL.

The mass of face serum in the bottle has been:

[tex]\rm Density=\dfrac{Mass}{Volume}\\ 0.979\;g/mL=\dfrac{Mass}{250\;mL}\\ Mass=244.75\;g[/tex]

The total mass of face serum has been 244.75 grams.

The percent mass of citric acid in face serum is 0.5%. This states the presence of 0.5-gram citric acids in 100 grams sample.

The mass of citric acid in the face serum sample is given as:

[tex]\rm 100\;gram\;sample=0.5\;g\;H_3C_6H_5O_7\\\\244.75\;grams\;sample=\dfrac{0.5}{100}\;\times\;244.75\;grams\; H_3C_6H_5O_7\\\\244.75\;grams\;sample=1.22\;grams\;H_3C_6H_5O_7[/tex]

The mass of citric acid present in 250 mL serum sample has been 1.22 grams.

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Given what we know, we can confirm that the option that most explains the difference between Salt water ecosystems and fresh water habitats is option C.

We can say that Fresh water habitats are more diverse than  Salt water ecosystems. This is the correct option amongst the ones listed. The options regarding land mammals are incorrect given that land mammals may use  Salt water ecosystems, but do not reside in them. Finally, option A is incorrect given that both fresh and  Salt water animals are often migratory.

Therefore, we can confirm that for these reasons, the correct choice is option C.

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Answer:

Some land mammals live in freshwater habitats but not in salt-water ecosystems.

Explanation:

i did the quiz

Answer:

GAS strand

Explanation:

Used to standarized strand to make solution to fasten the calculation

Answer:

3286 grams

Explanation:

For every mol of Ni(CO)4 reactant, a mol of Ni is produced (55.99 mol). Multiply this by the molecular mass of Ni (58.69 g/mol) to give 3286 grams

Answer:

Element  Symbol  Atomic Mass  # of Atoms  Mass PercentNickelNi58.6934134.377%CarbonC12.0107428.139%OxygenO15.9994437.484%

Answer:

2, I believe.

Explanation:

In the cO2 molecule, each oxygen atom has two lone pairs of electrons. The carbon atom has no lone pairs.

Explanation:

In the cO2

molecule, each oxygen atom has two lone pairs of electrons. The carbon atom has no lone pairs. The carbon-oxygen bonds are double bonds.

Answer:

1000 km/s is the formula for density of liquid

Answer:

photosynthesis

Explanation:

Bc it is

In 1871, a Russian Chemist, Dimitri Mendeleev, gave a useful scheme for classification of elements. He presented the first regular periodic table in which elements of similar chemical properties were arranged in eight vertical columns called groups. The horizontal rows of table were called periods. He arranged elements in ascending order of their  atomic masses and found that elements having similar chemical properties appeared at regular intervals. This observation was called Periodic Law.

[tex] \huge \qquad \underline{ \boxed{ \sf Answer}}[/tex]

Here's the Explanation ~

Loudness depends on Amplitude,

Pitch depends on frequency,

Therefore, the correct choice is :

A. low frequency and high amplitude

Fun fact ( added by me )

Generally guys have low pitched voice, so it's actually easy to understand what they say even if they speak fast, but in case of girls there's a shrill type of voice with High pitch ( frequency ) such that sometimes it's hard to understand what they are saying if they are fast, also it's kind of irritating. [ don't get serious about it lol ]

Hard water is water that contains calcium ions or magnesium ions.

The term hard water is water that contains calcium ions or magnesium ions.  These ions are able to interact with soap and prevent the formation of lather thereby making it difficult for this water to be used in washing.

However, hard water is good for building strong bones as well as for building the calcareous shell of organisms.

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Answer:

the metal gets cold and week

Explanation:

Answer:

Explanation:

This is answer to your other question:

Mosquito has the smallest number of chromosomes of the organisms shown. So it will be the simplest for studies.  Also because mosquito reproduces within days, you can study effects of any chromosome change on its offspring.

Answer: A, C, E, F

Explanation: cuz edge 2020

Answer:

a, c, e, f

Explanation:

got it right on edge2020

The term watershed refers to a region of land through which water may be drained into a particular receiving water body.

The term watershed refers to a region of land through which water may be drained into a particular receiving water body such as a river or a stream. The question is incomplete as the watershed model was not shown here.

However, watersheds provide movement corridors for water and may help to prevent erosion and manage the ecosystem better.

Learn more about watershed:https://brainly.com/question/2142603

The numerical value of equilibrium constant depends on

As the Temperature increases the value of equilibrium constant decreases and when the Temperature decreases the equilibrium of constant increases. That means they are inversely proportional..

The numerical value of the equilibrium constant depends on the temperature (Option 1).

The equilibrium constant refers to the exact value in a chemical reaction when products and reactants are found in a state of equilibrium.

In conclusion, the numerical value of the equilibrium constant depends on the temperature (Option 1).

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Answer:

The concept of lewis acids and bases can explain the acidic nature of CO2. A lewis acid is a compound which can accept an electron pair whereas a lewis base is a compound which can donate an electron pair. CO2 acts as a lewis acid.

When sound wave travels from air to a person's eardrum, both the speed and the wavelength of the sound change.

The refractive index of sound is obtained from the ratio of speed of sound in air to speed of sound in material.

refractive index = speed of sound in vacuum / speed of sound in material

refractive index = wavelength of sound in material / wavelength of sound in vacuum

Note: the frequency sound will remain constant.

Thus, when sound wave travels from air to a person's eardrum, both the speed and the wavelength of the sound change.

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Answer:

The molar solubility of KNO3 is not affected by the pH of the solution. MnS AlCl3 NaF Na3PO4 KNO3

Explanation:

KNO3 is a salt which is formed on the reaction of Strong Acid (HNO3) & Strong Base ( KOH).

Potassium ions nor Nitrate ions can neither loose or gain protons & Hydrogen ions . So there will no effect in pH of the Solution .

Answer:

C. A much larger amount of silk might be needed to produce the same effect

Explanation:

As you may know it will take a lot of silk to make bullet proof fabric out of it.

Answer:

I Guess C

Explanation:

The availability of spider silk is not enough for what is needed, so i believe C is the right answer. But that means that B is also a bit correct .

Answer:

Air pressure is the weight of air particles pressing down on the surface of the earth. Air pressure may be high or low. A high pressure system is associated with cooler temperatures and clear skies. A low pressure system is associated with warmer weather, storms or precipitation.

Barometer Measures: Air Pressure

Rain Gauge Measures: Precipitation

Answer:

Dry weather and sunshine :D

Answer:

in a

A2 is 0.5 also because they are in series

in b

A5 is 0.25 because A4+A5 should give A3

in c

Dependent variables are those that need a stimulus to present themselves. The independent variables are those that do not need a stimulus to present themselves and the control variables are the elements that remain unchanged throughout the experiment.

To increase the understanding of these variables, we can use as an example an experiment that seeks to evaluate the influence of root growth of transgenic corn with water stress. In this experiment, five plants of transgenic corn will suffer different levels of water stress, while one plant of the same corn will not suffer this stress and will be watered normally.

According to this, root growth is a variable that needs a stimulus to present itself, so this is the dependent variable. Water stress does not need any stimulus, being the independent variable. Finally, the corn plant that will not suffer any type of stress will remain unchanged throughout the experiment, being the control variable.

You didn't show the experiments your question refers to, which prevents me from providing an exact answer, but I hope the information above can help you.

More information about dependent and independent variables at the link:

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Answer:

Dependent variables are those that need a stimulus to present themselves. The independent variables are those that do not need a stimulus to present themselves and the control variables are the elements that remain unchanged throughout the experiment.

Importance of variables

They present the relationship between the elements of the experiment.

Allow hypotheses to be tested.

Allows comparisons between experimental treatments.

They encourage the evaluation of experimental data.

To increase the understanding of these variables, we can use as an example an experiment that seeks to evaluate the influence of root growth of transgenic corn with water stress. In this experiment, five plants of transgenic corn will suffer different levels of water stress, while one plant of the same corn will not suffer this stress and will be watered normally.

According to this, root growth is a variable that needs a stimulus to present itself, so this is the dependent variable. Water stress does not need any stimulus, being the independent variable. Finally, the corn plant that will not suffer any type of stress will remain unchanged throughout the experiment, being the control variable.

You didn't show the experiments your question refers to, which prevents me from providing an exact answer, but I hope the information above can help you.

Explanation:

Answer:

because there's a chemical reaction that happens between the anions and cations. The cations are positive ions and anion are negative ions. the reaction occurs as one loses electrons and the other one gaining.

Answer:

(b) Soft drink

Explanation:

Because soft drinks contain carbonic acid, which reacts with the iron nail. An iron nail kept in a soft drink will lose its shine and appear dull. Because mustard oil, coconut oil, and kerosene have no reaction with iron nails, they do not lose their shine when maintained in these solutions.

Answer:

This means that as pressure increases,the volume decreases or the volume increases as the temperature increases, and decreases as the temperature decreases

Answer:

1 mole of CO2 has 6.02 x 10^23 molecules of CO2. Say x moles of CO2 has 3.0x10^23 molecules of CO2. Therefore x = 3/6.02 = 0.50. M = 0.50 * (12 + 2x16) = 0.50 * 44 = 22g.

6CO2 + 6H2O → C6H12O6 + 6O2

glucose produced = 1/6 x 23.6 = 3.93 moles

Answer:59/150

Explanation: