carbon is exchanged regularly between the atmosphere, the biosphere, and the oceans. the keeling curve has measured the concentration of carbon dioxide in the atmosphere since 1958; the graph shown here includes data from 1990 to the present. although this curve shows a steady rise in atmospheric co2 concentration, co2 concentrations are lower in spring and summer than they are in fall and winter each year, causing the line to waver in frequent (yet small) ups and downs. what would make the concentration of co2 oscillate in this way?

The false statement is that adding more H2(g) rises the equilibrium constant.

Q can be utilized to predict which way a response will shift to achieve equilibrium. If K > Q, the reaction will continue, converting reagents into products. If K Q, the reaction will go in the opposite direction, converting products back into reactants. If Q = K, the system has already reached equilibrium.

Here are some examples of equilibrium: A book resting on a table. A car moving at a constant speed. A chemical reaction in which the prices of forward and reverse reactions are the same.

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The complete question is-

Consider: H2(g)+I2(s)=2HI(g)

Which of the following statements about the equilibrium is false?

A. If the system is heated, the right side is favored

B. This is a heterogeneous equilibrium

C. If the pressure on the system is increased by changing the volume, the left side is favored

D. Adding more H2(g) increases the equilibrium constant

E. Removing HI as it forms forces the equilibrium to the right

Based on its location on the periodic table,  properties will Krypton (Kr) have is it is unreactive , gas, stable.

Krypton in the periodic table belongs to  group 18. the group 18 in periodic table is noble gases. the noble gas is the very extremely stable. the noble gases have 8 electrons in the outer most valence shell. they follow the octet rule and this makes noble gases unreactive and stable. they do not bond with other because they are already stable.

Thus, Based on its location on the periodic table,  properties will Krypton (Kr) have is it is unreactive , gas, stable.

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Answer:

1. Hydrogen will diffuse faster.

2. The ratio of diffusion of hydrogen gas to that of the unknown gas is 4 : 1

Explanation:

Let the rate of diffusion of hydrogen gas, H2 be R1

Let the molar mass of H2 be M1

Let the rate of diffusion of the unknown gas be R2.

Let the molar mass of the unknown gas be M2.

Molar mass of H2 (M1) = 2x1 =2g/mol

Molar mass of unknown gas (M2) = 16 times that of H2

= 16 x 2 = 32g/mol

1. Determination of the gas that will diffuse faster. This is illustrated below:

R1/R2 = √(M2/M1)

R1/R2 = √(32/2)

R1/R2 = √16

R1/R2 = 4

Cross multiply

R1 = 4R2

From the above calculations, we can see that the rate of diffusion H2 (R1) is four times the rate of diffusion of the unknown gas (R2).

Therefore, hydrogen will diffuse faster.

2. Again, from the calculations made above, the ratio of diffusion of hydrogen (R1) to that of the unknown gas (R2) is given by;

R1/R2 = 4

Therefore, the ratio of diffusion of hydrogen (R1) to that of the unknown gas (R2) is:

4 : 1

The net ionic equation for the reaction between copper(II) sulfate and ammonium hydroxide depends on whether a reaction occurs.

If a reaction occurs, the balanced net ionic equation will be provided. Otherwise, if no reaction occurs, the notation "nr" will be used to indicate no reaction.When copper(II) sulfate (CuSO4) and ammonium hydroxide (NH4OH) are mixed in aqueous solution, they may undergo a precipitation reaction if a reaction occurs.

In this case, the copper(II) ion (Cu2+) from copper(II) sulfate reacts with the hydroxide ion (OH-) from ammonium hydroxide to form a precipitate of copper(II) hydroxide (Cu(OH)2).The balanced net ionic equation for the reaction, assuming a precipitation occurs, is:

Cu2+ (aq) + 2 OH- (aq) → Cu(OH)2 (s)

On the other hand, if no reaction occurs, it means that there are no significant chemical changes taking place when the two solutions are mixed. In this case, the notation "nr" (no reaction) would be used to indicate that no reaction occurs.

It is important to note that the precise conditions, concentrations, and stoichiometric ratios of the reactants can influence whether a reaction occurs or not. Conducting the actual experiment and observing the formation or lack of formation of a precipitate would provide definitive evidence of whether a reaction takes place.

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The element with lowest electronegativity, based on periodic trends, is Li. An atom's electronegativity is measured.

Atomic radius, ionisation energy, electron attraction, electronegativity, valency, and metallic nature are important periodic trends. Due to the periodic nature of the elements and their similar electrical configurations within their various groups or periods, these tendencies are present.

The number of protons on the nucleus, the number of energetic levels, & the shielding effect are three variables that aid in the prediction of trends in the periodic table. In any group, the atomic radii get larger from top to bottom.

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Answer:

229,792,458

Explanation:

if it isnt this just ask again

a) To find the percentage of yellow gumdrops, we need to divide the number of yellow gumdrops by the total number of gumdrops and multiply by 100.

Number of yellow gumdrops = 11

Total number of gumdrops = 16 (orange) + 11 (yellow) + 17 (black) = 44

Percentage of yellow gumdrops = (11 / 44) * 100 = 25%

The bag of gumdrops contains 25% yellow gumdrops.

b) Similarly, to find the percentage of black gumdrops, we divide the number of black gumdrops by the total number of gumdrops and multiply by 100.

Number of black gumdrops = 17

Total number of gumdrops = 16 (orange) + 11 (yellow) + 17 (black) = 44

Percentage of black gumdrops = (17 / 44) * 100 = 38.64% (rounded to two decimal places)

The bag of gumdrops contains approximately 38.64% black gumdrops.

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Answer:

The mole is a key unit in chemistry. The molar mass of a substance, in grams, is numerically equal to one atom’s or molecule’s mass in atomic mass units.

Explanation:

I, m right?

Answer:

fractional distillation  is the correct answer

Explanation:

make me brainlist

fractional distillation is method of separation would be most appropriate for separating a mixture of water and alcohol.

Distillation can be defined as the process of separating mixtures which is based on differences in thee changes of the phase of components of the mixture.

It is widely used method of separation of mixture of liquids, where the liquid can be heated having different boiling points, into the gas phase.

In this process the gas is condensed back into liquid and collected, by repeating this process and the collected liquid will improve the purity of the product and the process is called double distillation.

It is mostly applied to liquids and the reverse process can be used to separate gases by liquefying components by using heat and pressure, it can separate a mixture based on different boiling points.

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Answer:

16.....................

Answer:

HETEROTROPHIC

Explanation:

Based on nutrition, organisms are classified into autotrophic and heterotrophic. Autotrophic organisms are organisms that are capable of making their own food using either light source (photosynthesis) e.g plants or chemical source (chemosynthesis) e.g some bacteria.

Contrarily, HETEROTROPHIC organisms are those that are unable to synthesize their own food themselves, hence, they rely on other organisms for their energy source. Types of heterotrophism include; saprophytism, predation etc. Most bacteria falls under this heterotrophic category because they are unable to make their own food.

The heat is absorbed when a 10 gram piece of platinum is warmed from 100 c to 150 c is 66.5 J

Energy is a sort of heat. Heat changes the condition of a substance when it is absorbed by it by weakening and rupturing the inter-particle bonds (solid to liquid for example). A phase change brought on by heat is NOT enough to raise the temperature. A reaction that absorbs heat is called endothermic.

The bulk of the body affects how much heat is absorbed. The bulk of the body directly affects how much heat energy is absorbed. where M is the body's mass and Q is the quantity of heat absorbed.

Using the equation H=cpmT and the water specific heat, the amount of heat absorbed is computed.

Given,

heat of slid platinum = 0.133

150 -100=50

heat absorbed = 0.133*10*50

= 66.5 J

Therefore , The heat is absorbed when a 10 gram piece of platinum is warmed from 100 c to 150 c is 66.5 J

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Answer:

H20is water andN20is nitrogen 4 oxide

Option B will complete the reaction. Hence, option B is correct.

What is amine?

Amines are organic derivatives of ammonia, in which one, two, or all three of the hydrogens of ammonia are replaced by organic groups.

The complete reaction is:

\(CH_3CH_2CI+ CH_3NHCH_3\) → \(H_3C H_3C NCH_2CH_3 + HCI\)

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An isotope undergoing radioactive decay by emitting radiation that has a -1 charge is most likely an electron, which is commonly known as a beta particle. Beta particles have a negative charge and are emitted by the nucleus during beta decay.

Here, correct option is A.

Beta particles have a small mass compared to other types of particles, such as alpha particles and neutrons, but they do have mass. Therefore, option (b) "no mass" is incorrect.

Beta particles have a moderate penetrating power and can be stopped by a few millimeters of aluminum or a few centimeters of wood or other materials. Therefore, option (d) "high penetrating power" is also incorrect.

Thus, the correct answer to this question is option (a) "some shielding required," which means that some amount of material is required to shield against the beta radiation. Beta particles can penetrate some distance into materials, but they can be stopped by a layer of material of sufficient thickness.

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Answer:

I believe the correct answer is A.

Explanation:

He atoms are smaller than Ne atoms (4AMU vs 20AMU).  Although the kinetic energy and concentrations are the same (same temperature and each have 0.5 mole  in 10.0L containers), the kinetic energy is a product of mass and velocity.  Since the Ne mass is greater, it will have a lower speed, thus taking longer to bounce out the pinhole.

we have reason to believe that increasing the substrate concentration causes an increase in the mean velocity of the reaction by more than 0.5 micromole per 30 minutes.

Our null hypothesis is that the mean velocity is the same for both substrate concentrations, and the alternative hypothesis is that the mean velocity for the higher concentration is greater than the mean velocity for the lower concentration by more than 0.5 micromole per 30 minutes.

Using the given data, we can calculate the pooled standard deviation as 1.37\((sqrt(((15-1)(1.5^2) + (12-1)(1.2^2))/(15+12-2)))\). The t-test statistic is then calculated as (8.8-7.5-0.5)/(1.37*sqrt(1/15+1/12)) = 3.01.

Looking up the critical value for a two-tailed test with 0.01 level of significance and 25 degrees of freedom (the total sample size minus 2), we get 2.492. Since our calculated t-statistic (3.01) is greater than the critical value (2.492), we can reject the null hypothesis and conclude that there is a significant difference in mean velocity between the two substrate concentrations at the 0.01 level of significance.

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Using a t-distribution table or calculator, we find the critical t-value to be 2.63.

sp = √(((n1-1)*s1² + (n2-1)*s2²) / (n1+n2-2))

Using the given data, we have:

sp = √((15-1)*1.5² + (12-1)*1.2²) / (15+12-2)) = 1.394

Next, we calculate the t-statistic using the formula:

Using the given data, we have:

t = (8.8 - 7.5 - 0.5) / (1.394 * √t(1/15 + 1/12)) = 2.63

Finally, we compare the calculated t-value to the critical t-value at a significance level of 0.01 and degrees of freedom equal to the sum of the sample sizes minus two (n1+n2-2).

T-distribution is a statistical concept used to estimate the uncertainty of a measurement or experiment. It is a probability distribution that arises when the population variance is unknown and must be estimated from the sample data.

The t-distribution is similar to the standard normal distribution, but with heavier tails, which means it accounts for more variability in small sample sizes. It is characterized by a parameter called the degrees of freedom (df), which is the sample size minus one. As the sample size increases, the t-distribution becomes more similar to the standard normal distribution. The t-distribution is commonly used in chemistry to calculate confidence intervals, which are ranges of values that are likely to contain the true value of a parameter with a certain level of confidence.

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Among the given options, the tests that are left-tailed are H0:μ≥18, Ha:μ<18, H0:μ≥11.3, Ha:μ<11.3, and H0:μ≥3.7, Ha:μ<3.7.

In these tests, the null hypothesis (H0) states that the population mean (μ) is greater than or equal to a specific value, while the alternative hypothesis (Ha) suggests that the population mean is less than that value.

A left-tailed test is used when the alternative hypothesis suggests that the population parameter is less than a certain value.

This indicates a left-tailed test, where the critical region is in the left tail of the distribution. These tests focus on detecting a significant decrease or difference in the population mean.

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Complete question :

Which of the hypothesis tests listed below is a left-tailed test? Select all correct answers.

Select all that apply: H0:μ≥18, Ha:μ<18 H0:μ≤19.3, Ha:μ>19.3 H0:μ=8, Ha:μ≠8 H0:μ≥11.3, Ha:μ<11.3 H0:μ≥3.7, Ha:μ<3.7

a) The sphere emits thermal radiation at a rate of 139.75 Watts.

b) The sphere absorbs thermal radiation at a rate of 37.66 Watts.

c) The sphere's net rate of energy exchange is 102.09 Watts.

To calculate the rates of thermal radiation emission and absorption, we can use the Stefan-Boltzmann law, which states that the rate of thermal radiation emitted or absorbed by an object is proportional to its surface area, temperature, and the Stefan-Boltzmann constant.

a) The rate of thermal radiation emitted by the sphere can be calculated using the formula:

Emitting Rate = emissivity * surface area * Stefan-Boltzmann constant * (\(temperature^4 - environment\ temperature^4\))

Plugging in the given values:

Emitting Rate = \(0.924 * (4\pi * (0.457)^2) * 5.67 \times 10^{-8} * ((32.2 + 273.15)^4 - (82.9 + 273.15)^4)\)

Emitting Rate ≈ 139.75 Watts

b) The rate of thermal radiation absorbed by the sphere can be calculated in a similar way but using the environment temperature as the object's temperature:

Absorbing Rate = emissivity * surface area * Stefan-Boltzmann constant * (\(environment\ temperature^4 - temperature^4\))

Plugging in the given values:

Absorbing Rate = \(0.924 * (4\pi * (0.457)^2) * 5.67 \times 10^{-8} * ((82.9 + 273.15)^4 - (32.2 + 273.15)^4)\)

Absorbing Rate ≈ 37.66 Watts

c) The net rate of energy exchange is the difference between the emitting rate and the absorbing rate:

Net Rate = Emitting Rate - Absorbing Rate

Net Rate = 139.75 Watts - 37.66 Watts

Net Rate ≈ 102.09 Watts

Therefore, the sphere emits thermal radiation at a rate of 139.75 Watts, absorbs thermal radiation at a rate of 37.66 Watts, and has a net rate of energy exchange of 102.09 Watts.

Note: The units for all the rates are Watts.

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Answer: It has to be stratosphere because This region of the atmosphere is called the stratosphere. It is present in stratosphere According to NASA earth have 6 atmospheric layers..the layer just above the earth is troposphere and above this layer is the stratosphere.

Explanation:

The term used to identify anything that occupies space is matter. The correct option is b).

Matter refers to anything that has mass and takes up space. It includes all physical substances, such as solids, liquids, gases, and plasma. Matter is composed of atoms, which are the building blocks of all substances. Atoms consist of a nucleus of protons and neutrons, surrounded by a cloud of electrons.

The properties of matter can be described in terms of its physical and chemical characteristics, such as its mass, density, color, and reactivity. Understanding the properties of matter is essential for many fields of science, including physics, chemistry, and materials science. Therefore, the correct is b).

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The component in the solar cell system which provides electrons to replace the electrons released by the dye simply is the graphite layer.

The graphite layer is one of the major parts oth the solar cell. It help in the provision of electrons by acting as a counter electrode within the electrolyte. In order, this layer is part responsible for replacing electrons produced by dyes.

In conclusion, we can now confirm from all said and done from above that the solar cell too has a way of producing electrons.

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The buffer solution that will have the greatest buffer capacity is the solution that is 1.0 m in both acetic acid and sodium acetate.

Buffer capacity refers to the effectiveness of a buffer in resisting changes in pH when exposed to additional acid or base. The higher the buffer capacity, the more resistant the solution is to changes in pH. The buffer solution that will have the greatest buffer capacity is the solution that is 1.0 m in both acetic acid and sodium acetate. Acetic acid is an organic acid that reacts with a strong base like sodium hydroxide to produce a salt of acetic acid, known as sodium acetate. In this reaction, one hydrogen ion of acetic acid is replaced by a sodium ion.

The chemical equation is as follows:

C2H4O2(aq) + NaOH(aq) → NaC2H3O2(aq) + H2O(l)

This reaction produces a buffer solution of acetic acid and sodium acetate. The solution has a pH of around 4.8 and acts as a buffer because the acetate ions can react with additional hydrogen ions, while acetic acid can react with additional hydroxide ions, thus preventing significant changes in pH. The other options contain the following: a solution that is 0.1 m in both ammonia and ammonium nitrate, a solution that is 1.0 m in HBrO and 0.1 m in NaBrO, a solution that is 0.1 m in both acetic acid and sodium acetate, a solution that is 0.1 m in ammonia and 1.0 m in ammonium nitrate.

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Answer:

detail is given below.

Explanation:

The charged particles of nucleus are protons while neutrons are neutral having no charge.

We know that an atom consist of electrons, protons and neutrons. Neutrons and protons are present inside the nucleus while electrons are present out side the nucleus.

Electron has a negative charge and is written as e⁻. The mass of electron is 9.10938356×10⁻³¹ Kg . While mass of proton and neutron is 1.672623×10⁻²⁷Kg and 1.674929×10⁻²⁷ Kg respectively.

Symbol of proton= P⁺  

Symbol of neutron= n⁰  

The number of electron or number of protons are called atomic number while mass number of an atom is sum of protons and neutrons.

one proton contribute 1 amu to the total weight. There are 20 protons and 20 neutrons in Ca thus its atomic mass is 40 amu.

While the atomic number is 20.

it is likely the stimulus responsible for the differences in the growth pattern is light reaching the tree.

A stimulus is a change either internal or external that triggers a response in a living organism.

Light is required for trees to carry out photosynthesis, this will allow the tree to obtain energy. Due to this, if the light is limited due to competition with other plants trees will grow high to obtain this valuable resource.

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