What is the maximum lifespan of a Rice plant?

Answer:

0.70 J/g.°C

Explanation:

Step 1: Given data

Step 2: Calculate the specific heat of graphite

We will use the following expression.

Q = c × m × ΔT

c = Q / m × ΔT

c = 1136 J / 402 g × (30°C - 26°C)

c = 0.70 J/g.°C

The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.

Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.

The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.

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Answer: The suspected and crime scene fingerprint patterns are similar which means they belong to the same individual.

Explanation:

A:  Ending ridge between two lines forming a loop like structure common in both suspected and crimes scene patterns.

B: Bifurcation which includes the formation of fork like shape of the ridge.

C: Island is a dot or point like structure which is common in both patterns.

D: It includes delta which is seen in the case of loop and whorl patterns of the fingerprint in loop there is only one delta and in case of whorl there are two deltas. The delta have an island and a bifurcation in it which is common in both patterns of the fingerprints.

E: Intersection occurs when two ridges changes their directions. It is common in the two patterns.

Explanation:

The standard model of particle physics is a relativistic theory of quantum fields developed between 1970 and 1973 [citation needed] based on the ideas of unification and symmetries [1] that describes the fundamental structure of matter and vacuum considering the elementary particles as irreducible entities whose kinematics is governed by the four known fundamental interactions (except for gravity, whose main theory, general relativity, does not fit the mathematical models of the quantum world). The word "model" in the name comes from the 1970s when there was not enough experimental evidence to confirm the model. [1] To date, almost all experimental tests of the three forces described by the standard model are in agreement. with their predictions. However, the standard model falls short of being a complete theory of fundamental interactions due to several unresolved issues.

Answer:

Joints

Explanation:

Without joints we would not be able to bend our arms or legs. Hence option C is correct.

Bending is defined as the behavior of a thin structural element under an external load that is applied perpendicular to the element's longitudinal axis. Plants and their parts are thought to bend as a result of a flexure process in which the curvature of the plant part changes. The plant organs' collenchyma gives them flexibility and elasticity, preventing them from breaking when bent.

The force required to bend, straighten, and support joints is applied by muscles to the bones. Muscles act in pairs of flexors and extensors because they may pull on bones but not put them back into place. The extensor muscle relaxes and stretches as the flexor muscle contracts to bend the joint.

Thus, without joints we would not be able to bend our arms or legs. Hence option C is correct.

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Art Nouveau is perhaps the first historical artistic movement that comes to mind when thinking about the Neo-Traditional style and japan.

Thus, in order to comprehend Art Nouveau, one must first comprehend the context and symbolism that led to the development of the style.

Japan has cut off communication with the rest of the world by 1603. The floating world was determined to defend and preserve its culture, which was under severe attack from outside powers.

To debate the opening of Japan's heavily guarded gates, forty Japanese officials were dispatched to Europe in 1862, more than 250 years later. Goods from the two countries started to transcend oceans and lands to eagerly awaiting fingertips in order to reduce tensions between the countries and maintain stable Japan.

Thus, Art Nouveau is perhaps the first historical artistic movement that comes to mind when thinking about the Neo-Traditional style and japan.

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Answer:

K and Br

Explanation:

K and Br would form an ionic bond because K (potassium) is a metal and Br (bromine) is a nonmetal. Ionic bonds are created between metals and nonmetals.

Answer:

The right answer is "3 g".

Explanation:

Given:

Initial mass substance,

\(M_0=24 \ g\)

By using the relation between half lives and amount of substances will be:

⇒ \(M=\frac{M_0}{2^n}\)

        \(=\frac{24}{2^3}\)

        \(=3 \ g\)

Thus, the above is the correct answer.

46. Covalent bonds are formed by sharing electrons between atoms.

Covalent bonds are chemical bonds formed when two atoms share electrons. They occur between nonmetal atoms and involve the sharing of electron pairs, resulting in the formation of a stable molecule. Covalent bonds are typically found in molecular compounds.

47. Ionic bonds are formed by gaining or losing electrons between metals and nonmetals.

48. A subscript is used in a formula to indicate the number of atoms of an element in a compound.

49. Chemical reactivity or stability depends on the number of outer energy levels (valence shells) in atoms.

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Answer:

\(5.12*10^2^3\) atoms

Explanation:

\(0.85 moles Fe*\frac{6.022*10^2^3}{1 mole Fe} =5.12*10^2^3\)

Use dimensional analysis to convert to moles by putting the moles of Fe (iron) on top and multiply by Avogadro's constant to cancel out moles and be left with atoms.

Answer:

the protons are 98

and the neutrons are 153

you're welcome

but next time try to study harder.

The quantum numbers for the very last electron in Cadmium (Cd) atom is  (5, 0, 0, ±¹/₂) for the four quantum numbers.

Quantum numbers are the set of numbers used to express the location and energy of an electron in an atom.

There are four quantum numbers used to describe the location and energy of an electron in an atom, and they are:

The electronic configuration of cadmium is  [Kr]4d¹⁰5s².

Hence, cadmium belongs to period 5 of the periodic table, and the last electron occupies the 5s orbital.

The l value of the s orbital is 0, and mi is 0 as well.

The value of ms is ±¹/₂.

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The total number of atoms in 3.75 mol of ammonium nitrate, NH4NO3, is equal to the Avogadro's number, which is 6.022 x 10^23, times the number of moles, which is 3.75 in this case.

Thus, the total number of atoms in 3.75 mol of ammonium nitrate is equal to 2.26 x 10^24 atoms.

This number can be further broken down into the number of atoms of each element present in the compound. Ammonium nitrate is composed of two elements, nitrogen (N) and hydrogen (H). For each mole of ammonium nitrate, there are 4 moles of hydrogen atoms and 2 moles of nitrogen atoms.

Therefore, in 3.75 moles of ammonium nitrate, there are 15 moles of hydrogen atoms and 7.5 moles of nitrogen atoms, which is equal to 9 x 10^24 hydrogen atoms and 4.05 x 10^24 nitrogen atoms.

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According to the forces of attraction, liquid of orange color has molecules separated from each other.

Forces of attraction  is a force by which atoms in a molecule  combine. it is basically an attractive force in nature.  It can act between an ion  and an atom as well.It varies for different  states  of matter that is solids, liquids and gases.

The forces of attraction are maximum in solids as  the molecules present in solid are tightly held while it is minimum in gases  as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.

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Answer:

Volume = 3.4 L

Explanation:

In order to calculate the volume of CO₂ produced when 15.2 g of CaCO₃ is heated, we need to first write out the balanced equation of the thermal decomposition of CaCO₃:

CaCO₃ (s) + [Heat] ⇒ CaO (s) + CO₂ (g)

Now, let's calculate the number of moles in 15.2 g CaCO₃:

mole no. = \(\mathrm{\frac{mass}{molar \ mass}}\)

                 = \(\frac{15.2}{40.1 + 12 + (16 \times 3)}\)

                 = 0.1518 moles

From the balanced equation above, we can see that the stoichiometric molar ratios of CaCO₃ and CO₂ are equal. Therefore, the number of moles of CO₂ produced is also 0.1518 moles.

Hence, from the formula for the number of moles of a gas, we can calculate the volume of  CO₂:

mole no. = \(\mathrm{\frac{Volume \ in \ L}{22.4}}\)

⇒ \(0.1518 = \mathrm{\frac{Volume}{22.4}}\)

⇒ Volume = 0.1518 × 22.4

                 = 3.4 L

Therefore, if 15.2 g of CaCO₃ is heated, 3.4 L of CO₂ is produced at STP.

If the efficiency of a machine increases, it means that the machine is able to convert a higher percentage of its input energy into useful work output.

This could happen due to various factors, such as reducing friction, improving the design of the machine, or using more efficient components. The machine requires less energy input to perform the same amount of work. This could result in cost savings, reduced energy consumption, and lower environmental impact.

The output of the machine increases while the input remains constant. This could result in increased productivity, faster production rates, and improved performance. The wear and tear on the machine may decrease, as it is working more efficiently and experiencing less stress. This could result in longer machine life and reduced maintenance costs. Increasing the efficiency of a machine can have many positive effects, including cost savings, improved performance, and reduced environmental impact.

The complete question is

If the efficiency of a machine increases, what happen?

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Answer:

hope it's help you dear

Explanation:

If one drops a stone into a pond, a very rapid, thin jet of water spouts upwards. ... A cavity forms behind the object during impact on the water surface. This cavity is subsequently compressed by hydrostatic pressure, which leads to the formation of the jet

answer and explanation

Charles's law tells use the relationship between volume and temperature of a gas by the equation

V1/T1 = V2/T2

from the data provided we find V2 by:

37/2.5 = V2/6.3

V2 = 93.2 degrees

the gas would have to be heated to 93.2 degrees to expand in volume to 6.3L

Answer:

How do amoeba respire.

Define Diffusion.

Answer:

A

Explanation:

We are given that the molar mass of boron triflouride BF₃ is 67.81 g/mol. We want to determine the number of molecules of BF₃ in 2 g of BF₃.

Recall that there are 6.02 × 10²³ molecules in any mole of a substance. In other words, there are 6.02 × 10²³ BF₃ molecules in a mole of BF₃. Starting with the initial value, multiply:

\(\displaystyle \begin{aligned} 2\text{ g BF$_3$}&\cdot \frac{1\text{ mol BF$_3$}}{67.81 \text{ g BF$_3$}} \cdot \frac{6.02\times 10^{23} \text{ molecules BF$_3$}}{1 \text{ mol BF$_3$}} \\ \\ &= 1.776 \times 10^{22} \text{ molecules BF$_3$}\end{aligned}\)

Hence, our answer is A.

*Perhaps it rendered the values incorrectly, but since we started with only 2 g of BF₃, our resulting calculation should only contain one significant digit. Hence, the correct answer should be 2 × 10²² molecules of BF₃.

The molecules of  BF₃ that are there in 2 g is 1.776 × 10²² molecules and the correct option is option A.

The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. It provides a specific measure of the number of atoms or molecules in a bulk sample of matter.

A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.

Given,

Molar mass of BF₃ = 67.81 g/mol

Mass = 2g

Moles = mass / molar mass

= 2 / 67.81

= 0.029 moles

1 mole = 6.023 × 10²³

0.029 moles = 6.023 × 10²³ × 0.029

= 1.776 × 10²² molecules

Thus, the ideal selection is option A.

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Answer:

-30.7 kj/mol

Explanation:

The standard free energy for the given reaction that is the hydrolysis of ATP is calculated using the formula:  ∆Go ’= -RTln K’eq

where,  

R = -8.315 J / mo

T = 298 K

For reaction,

1. K′eq1=270,

∆Go ’= -RTln K’eq

= - 8.315 x 298 x ln 270

=  - 8.315 x 298 x 5.59

= - 13,851.293 J / mo

= - 13.85 kj/mol

2. K′eq2=890

∆Go ’= -RTln K’eq

= - 8.315 x 298 x ln 890

=  - 8.315 x 298 x 6.79

=  - 16.82 kj/mol

therefore, total standard free energy

= - 13.85 + (-16.82)

=  -30.7 kj/mol

Thus, -30.7 kj/mol is the correct answer.

pH solution = 8.89

Given

The concentration of HBr solution = 1.3 x 10⁻⁹ M

Required

the pH

Solution

HBr = strong acid

General formula for strong acid :

[H⁺]= a . M

a = amount of H⁺

M = molarity of solution

HBr⇒H⁺ + Br⁻⇒ amount of H⁺ = 1 so a=1

Input the value :

[H⁺] = 1 x  1.3 x 10⁻⁹

[H⁺] = 1.3 x 10⁻⁹

pH = - log [H⁺]

pH = 9 - log 1.3

pH = 8.89

Taking into account the definition of Avogadro's number, 0.116 moles of acetic acid are in the sample.

Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.

Then you can apply the following rule of three: if 6.023×10²³ atoms are contained in 1 mole of carbon, then 1.40×10²³ atoms are contained in how many moles of carbon?

amount of moles of carbon= (1.40×10²³ atoms × 1 mole)÷ 6.023×10²³ atoms

amount of moles of carbon= 0.232 moles

So, the amount of moles of carbon in acetic acid that contains 1.40×10²³ carbon atoms is 0.232 moles.

On the other side, the small subscripts placed to the right of some symbol indicate the number of moles of the element that are found in the compound.

So, in pure acetic acid, CH₃COOH, are present 2 moles of carbon in 1 mole of acetic acid.

Then you can apply the following rule of three: if 2 moles of carbon are present in 1 mole of acetic acid, then 0.232 moles of carbon are contained in how many moles of acetic acid?

\(amount of moles of acetic acid=\frac{0.232 moles of carbonx1 mole of acetic acid}{2 moles of carbon}\)

amount of moles of acetic acid= 0.116 moles

In summary, 0.116 moles of acetic acid are in the sample.

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Answer:

Explanation: Fractional distillation

The variances of the gravimetric and volumetric approaches are not significantly different because the calculated F-value (0.233) is smaller than the crucial F-value (4.76).

We can use the F-test to see if the variance of the gravimetric approach differs noticeably from that of the volumetric method. The F-test assesses whether there is a significant difference between two data sets by comparing the ratio of their variances.

Let's first compute the variances for the two approaches. We have four replicate measurements for the gravimetric technique: 13.0, 13.5, 13.3, and 12.9. We compute the average of the squared deviations from the mean to determine the variance:

Gravimetric variance is calculated as follows: [(13.0 - 13.2)2 + (13.5 - 13.2)2 + (13.3 - 13.2)2 + (12.9 - 13.2)2] / 4 = 0.1175

We have the volumetric approach, which

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All are true. The resulting solution will have a NO3- ion concentration of 672 mmoles/580 mL, or 1.159 M.

Pb(NO3)2 volume = 260 mL = 0.26 L

Pb(NO3)2 has  molarity of 1.2 M.

KI volume = 300 mL = 0.3 L

KI has a molarity of 1.9 M.

Pb(NO3)2 + 2KI reaction rightarrow PbI2 + 2KNO3

First potassium iodide.

Potassium iodide we must determine the moles of reactants present: Pb(NO3)2 moles = Pb molarity (NO3)  1.2 × 0.26 = 0.312 moles = 2 times Volume in L 1.9 x 0.3 = 0.57 moles of KI = Molarity of KI x Volume in L

We know from stoichiometry that For the reaction to proceed, 1 mole of KI requires 1/2 mole of Pb(NO3)

2. As a result, 0.57 mole of KI necessitates (1/2 * 0.57) mole of Pb(NO3)2 for the reaction to continue.

0.285 moles of Pb(NO3)2 required

We have 0.312 moles, which indicates that Pb(NO3)2 is present in excess.

You mix 260. mL of 1.20 M lead(II) nitrate with 300. mL of 1.90 M potassium iodide.The lead (II) iodide is insoluble  all are true.  

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Answer:

A small amount of chemical splashes in Frank's eye. What should happen next? Frank should go to the eyewash station while his lab partner tells the teacher what happened.

Explanation:

Brainlist

Answer:

1. Both

2. Phosphorylation

3. Both

4. Phosphorylation

5. Oxidative.

6. Both

Explanation:

Phosphorylation only occurs in chloroplast and it involves larger electrical component. Both Phosphorylation and oxidative occurs in mitochondria and it involves proton gradient. They occur in plants to produce ATP. Oxidative involves in smaller electrical component.

Photophosphorylation is a process that captures the solar energy from the sun to transform it into chemical energy. It occurs in the chloroplast of a plant cell.

Photophosphorylation is a process of converting solar energy from the sun to ATP needed by plants and other organisms for cellular function and activity. This process takes place in the chloroplast of the plant cell and requires electrical components.

Oxidative Phosphorylation is the process of producing ATP with the help of oxygen and enzymes hence, occurs in aerobic cells. It does not need a larger electrical component.

Both phosphorylation and oxidative phosphorylation occurs in the mitochondria of plants cells and involves a proton gradient for the formation of ATP.

Therefore, oxidative phosphorylation option 5. involves a smaller electrical component, phosphorylation option 2. occurs in the chloroplast, and option 4. needs a larger electrical component.

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For an entire species to survive, it must allow for new generations to maintain the population. This is the challenge of gathering energy. The correct option is B.

A resource is a physical good that people appreciate and need, including air, water, and land.

A resource can be classified as renewable or nonrenewable based on whether it can replace itself at the rate it is used up or whether it has a finite supply.

Species accumulate the resources they need to survive over thousands of years. These resources are frequently scarce in nature, forcing individuals within a group to struggle for them in order to survive.

An entire species needs to be able to reproduce in order to maintain its population. The difficulty in accumulating energy is this.

Thus, the correct option is B.

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