How do spores help the survival of spore-bearing plant?

Answer:

temporary changes are the changes which are there only for a short period if time generally temporary changes are reversible permanent changes are the changes which remain to for longer time and are not reversible

Explanation:

hope it is helpful for

Benzene can be produced by the use of three molecules of etheyne as shown.

The term benzene is a compound that is aromatic in nature. When we say that the compound is aromatic we mean that the compound is also satisfies the Huckel rule and there are [4n + 1] number of pi electrons in the molecule.

We can make a mole of benzene when we heat three moles of ethyne to a very high temperature. We have to recall that benzene is made up of three double bonds that are resonating and that the compound is quite stable. It does not undergo an addition reaction but it does undergo a substitution reaction.

The way that we can be able to produce benzene by the use of three molecules of ethyne have been shown in the image attached to this answer.

Learn more about benzene:https://brainly.com/question/14525517

#SPJ1

Answer:

The formula of acceleration is final velocity-initial velocity÷time taken

Explanation:

v-u/t

Answer:

acceleration = (vFinal − vInitial)/ (tFinal − tInitial) Where v stands for velocity and t stands for time.

Answer:

P2 = 2.25 atm

Explanation:

Given:

V1 = 1.5 L. V2 = 2.0 L

P1 = 3.0 atm. P2 = ?

Use Boyle's law and solve for P2:

P1V1 = P2V2

or

P2 = (V1/V2)P1

= (1.5 L/2.0L)(3.0 atm)

= 2.25 atm

Yes, the percent yield would decrease if copper metal was lost while transferring from the beaker to the evaporating dish.

The percent yield is calculated by dividing the actual yield by the theoretical yield and multiplying by 100%. The theoretical yield is the maximum amount of product that can be obtained from a given amount of reactant, assuming complete conversion of the reactant to product, and is based on stoichiometry.

If copper metal is lost during the transfer, the actual yield of copper obtained will be less than the theoretical yield, resulting in a lower percent yield. This is because the lost copper will not be available for reaction and will not contribute to the formation of the final product. Therefore, any copper that is lost during the transfer will reduce the amount of product obtained and decrease the percent yield.

To obtain a more accurate percent yield, it is important to minimize the loss of reactants or products during the experiment. Careful handling and transfer of the reactants and products can help reduce the loss and increase the accuracy of the yield calculation.

To know more about percent yield, refer to the link below:

https://brainly.com/question/17042787#

#SPJ11

Below is an example of how you can fill in a data table based on the properties of minerals B through F:

A Gizmo is an interactive online simulation tool that allows users to manipulate variables and collect data to answer scientific questions.

In this case, we are likely using a Gizmo that provides information about various properties of minerals, such as their color, streak, hardness, and density. We would use the Gizmo to test each mineral and record the data we collect in a table, including information about each property for each mineral.

For example, we might find that mineral B is light green in color, has a white streak, has a hardness of 3 on the Mohs scale, and a density of 2.5 g/cm3. We would record this information in the appropriate cells in our data table. We would repeat this process for minerals C through F, and record all of our findings in the table.

Note: The properties mentioned in the table are just examples and may vary based on the actual properties of the minerals B through F.

Read more about minerals  here:

https://brainly.com/question/15844293

#SPJ1

Answer:  457.8

Explanation:

345.8*225/703.55

Using the change of base rule to find the logarithm to four decimal places. the correct answer is 11.4235.

To find the logarithm of 143.2 using the change of base rule, we can choose any base we prefer. Let's use base 10 and natural logarithm (base e) for this calculation.

First, we'll use the change of base formula, which states that log(base b) x = log(base c) x / log(base c) b. In this case, we'll calculate log(base 10) 143.2.

We'll use the natural logarithm (ln) as our intermediary step. The natural logarithm of 143.2 can be calculated as ln(143.2).

Using a calculator, we find that ln(143.2) is approximately 4.9628.

Next, we need to calculate log(base 10) e, which is the logarithm of e with base 10. Using a calculator, we find log(base 10) e is approximately 0.4343.

Finally, we apply the change of base formula:

log(base 10) 143.2 ≈ ln(143.2) / log(base 10) e
                ≈ 4.9628 / 0.4343
                ≈ 11.4235

Rounding to four decimal places, the logarithm of 143.2 using base 10 is approximately 11.4235.

Learn more about logarithm here :-

https://brainly.com/question/30226560

#SPJ11

The pressure of ammonia inside the flask is approximately 14.28 atm.

To calculate the pressure of ammonia (NH3) inside the flask, we can use the ideal gas law equation:

PV = nRT

Where:

P = pressure (in units of pressure, such as atmospheres or Pascals)

V = volume (in liters)

n = number of moles of gas

R = ideal gas constant (0.0821 L·atm/(mol·K) for pressure in atm)

T = temperature (in Kelvin)

Given:

V = 1.2 L (volume of the flask)

n = 0.500 mol (number of moles of ammonia)

T = 423 K (temperature)

Substituting these values into the ideal gas law equation, we get:

P * 1.2 = 0.500 * 0.0821 * 423

P * 1.2 = 17.13173

P = 17.13173 / 1.2

P ≈ 14.28 atm

Therefore, the pressure of ammonia inside the flask is approximately 14.28 atm.

To know more about ideal gas law click this link -

brainly.com/question/12624936

#SPJ11

Answer:

frozen

Explanation:

I would say because when u freeze water it expands and denifys.

Since the initial concentration of "q" is equal to the initial concentration of "r", and the equilibrium constant, Kc, is 25, the reaction will proceed in the direction that generates more "r", until the concentration of "q" and "r" reach an equilibrium state.

The direction of a chemical reaction is determined by the relative concentrations of the reactants and products, which is described by the equilibrium constant, Kc. If the initial concentration of reactant "q" is equal to the initial concentration of product "r", the reaction will proceed in the direction that leads to an increase in the concentration of the species with the lower concentration, until the concentration of "q" and "r" reach an equilibrium state.

In this case, if 50 μM of "q" is mixed with 50 μM of "r", the initial concentration of "q" and "r" are equal, so the reaction will proceed in the direction that leads to an increase in the concentration of the species with the lower concentration. To determine the direction of the reaction, we can use the equation for the equilibrium constant, Kc:

Kc = [r]/[q]

If [r] > [q], then Kc > 25 and the reaction will proceed in the direction of generating more "q" to reach an equilibrium state.

If [r] < [q], then Kc < 25 and the reaction will proceed in the direction of generating more "r" to reach an equilibrium state.

Learn more about equilibrium here:

https://brainly.com/question/29627805

#SPJ4

Answer:

El agua oxigenada se encuentra en cuatro concentraciones diferentes expresadas “en tanto por ciento”: 8%, 30%, 35% y 50%. Sin embargo, hay quien prefiere hablar de “volúmenes” y no de “porcentajes”.

Answer:

Sodium chloride is ionically bonded. An electron has transferred from sodium to chlorine. Sodium has an electronegativity of 1.0, and chlorine has an electronegativity of 3.0.

...

The electronegativity difference between sodium and chlorine is 2.23 and the type of bond is ionic bond.

The tendency of an atom in a molecule to attract the shared pair of electrons towards itself is known as electronegativity.

Electronegativity is a kind of measure that tells how strongly atoms attract the bonding electrons to them.

Its symbol is a Greek letter that looks like an (X). It is directly proportional to the atom’s attraction for the electrons.

The compounds which form between the elements having a huge difference in the electronegativity are ionic compounds, and also have ionic bonding.

Electronegativity of Sodium = 0.93

Electronegativity of chlorine = 3.16

Difference = 2.23

The type of bond between them is ionic bond.

Therefore, The electronegativity difference between sodium and chlorine is 2.23 and the type of bond is ionic bond.

Learn more about Electronegativity, here:

https://brainly.com/question/17762711

#SPJ2

To calculate the flow rate of 2 L 05 NS (M) to infuse in 20 hr with a drop factor of 16 gtt/mL, we need to follow a few steps. Here's how to calculate the flow rate in gtt/min:First, we need to convert 2 L 05 NS to mL. 1 L = 1000 mL, so 2 L = 2000 mL. Since we have 50 mL left, we can add it up to get a total volume of 2050 mL.

Next, we need to calculate the total time in minutes, since the flow rate is in gtt/min. 20 hours = 20 × 60 = 1200 minutes.The formula for calculating the flow rate is: Flow rate (gtt/min) = Volume (mL) ÷ Time (min) ÷ Drop factor (gtt/mL)Now we can substitute the given values into the formula:

Flow rate (gtt/min) = 2050 mL ÷ 1200 min ÷ 16 gtt/mLFlow rate (gtt/min) = 0.10677 ≈ 0.11 gtt/min (rounded to 2 decimal places)Therefore, the flow rate of 2 L 05 NS (M) to infuse in 20 hr with a drop factor of 16 gtt/mL is approximately 0.11 gtt/min.

To know more about calculate visit:

https://brainly.com/question/30781060

#SPJ11

Answer:

Explanation:

The fission of U-235 can result in different products with varying numbers of neutrons, so it is not possible to determine the number of neutrons in the missing nucleus without additional information about the specific fission reaction.

The concentrations of the unknowns cannot be determined without information about the calibration curve.

To determine the concentrations of the unknowns based on the given absorbance values, we need to follow these steps:

Step 1: Establish a calibration curve

Measure the absorbance of known standard solutions with different concentrations. Prepare a series of standard solutions with known concentrations and measure their absorbance using the same instrument and conditions as the unknown samples. Plot a graph with absorbance on the y-axis and concentration on the x-axis.

Step 2: Fit a linear regression line

Fit a straight line through the data points on the calibration curve. Use a linear regression analysis to determine the slope (m) and y-intercept (b) of the line.

Step 3: Calculate the concentrations of the unknowns

Apply the equation of the calibration curve, which is in the form of Abs = m * C + b, where Abs is the absorbance and C is the concentration. Substitute the absorbance values of the unknowns (Unknown #1: 0.50, Unknown #2: 0.89, Unknown #3: 1.35) into the equation, along with the determined values of slope (m) and y-intercept (b), to calculate the concentrations of the unknowns. The concentration (C) can be obtained by rearranging the equation as C = (Abs - b) / m.

By following these steps, the concentrations of the unknowns can be determined based on the absorbance values and the calibration curve.

Learn more about calibration curve from the given link: https://brainly.com/question/30590682

#SPJ11

Answer:

2Al(NO3)3+3K2CO3->Al2(CO3)3+6KNO3

So the right answer is 2,3,1,6

Explanation:

First you look at the equation that isn't balance, you can see Al(NO3)3 while Al2(CO3)3, so you put 2 in Al(NO3)3.

Now we have 2Al is correct, but 6NO3. So we have 6KNO3, it also means we have 6K

Finally, we only have 2K as K2CO3 so we put 3 in it, so we have 3K2CO3.

Sorry about my explanation, it's hard to understand but the answer is correct.

Answer:

I think its electromagnetic spectrum

Answer:

Radiant energy is energy that travels in waves and can travel through space. The sun gives off radiant energy and is important here on earth for many natural processes to occur. The electromagnetic spectrum is the range of all forms of radiant energy from gamma rays to radio waves.

Explanation:

After three half-lives, 12.5% of the original sample of polonium remains.

Polonium is a very infrequent natural element. It is found in uranium ores but it is careless to extract it. It is obtained by bombarding bismuth-209 with neutrons to give bismuth-210, which then purifies to form polonium. All the industrially produced polonium in the world is made in Russia.Po-210 is an effect of the radioactive decay of uranium-238, which decays to radon-222 and then to polonium. Polonium 210 has a half-life of 138 days. Let the opening value of polonium-218 be 100. First half-life. Therefore, 6.25 % of the original sample remains after 4 half-lives that are 12 minutes. Element Polonium has atomic Number 84, p-block, Mass number is 209.

So we can conclude that polonium is a radioactive, silvery-gray, or black metallic element of the oxygen group in the periodic table.

Learn more about polonium here: https://brainly.com/question/16979893

#SPJ1

I believe the answer would be titanium. Good luck on your assignment and have a happy christmas :)

Answer:

no

Explanation:

stop troll hate

In model of molecules, gray spheres are carbon atoms, white spheres are hydrogen atoms , red spheres are oxygen atoms and blue spheres are nitrogen atoms. the model represent a molecule of NH₃ is model (A) that contains one blue sphere and 3 white sphere.

Ammonia (NH₃ ) is formed  with three atoms of hydrogen and one atom of nitrogen. In the molecule of NH₃ , three hydrogen atoms each shares their electron with nitrogen and form the covalent bond and molecule is formed NH₃ . in the given model (A) 3 white spheres of hydrogen are covalently bonded with one blue sphere of nitrogen.

Thus, In model of molecules, gray spheres are carbon atoms, white spheres are hydrogen atoms , red spheres are oxygen atoms and blue spheres are nitrogen atoms. the model represent a molecule of NH₃ is model (A) that contains one blue sphere and 3 white sphere.

To learn more about ammonia here

https://brainly.com/question/13838692

#SPJ1

According to the balanced equation, the reaction of 13.46 g of MgBr2 with 6.9 g of KOH will produce 6.9 g of Mg(OH)2 and 13.46 g of KBr.

The number of moles of MgBr2 and KOH can be calculated using the molar mass of each compound. 13.46g MgBr2 has a molar mass of 184.11 g/mol, so the number of moles of MgBr2 is 0.073 moles. 6.9g KOH has a molar mass of 56.1 g/mol, so the number of moles of KOH is 0.123 moles.

A chemical reaction is a process that involves the rearrangement of atoms or molecules to form new substances. Chemical reactions involve breaking and forming chemical bonds, which leads to the formation of new substances. Chemical reactions typically involve the transfer of electrons between molecules, or the breaking and forming of chemical bonds between atoms. This process usually results in the formation of new substances, as well as the release of energy in the form of heat and light.

Learn more about chemical reactions:

https://brainly.com/question/29470602

#SPJ4

Explanation

Given:

Mass of copper = 5.07 g

Density of copper = 8.96 g/mL = 8960 g/L

Requested: Volume of copper

Solution

p = m/V where p is the density, m is the mass and V is the volume

m = p x V

V = m/p

V = 5.07 g/8.96 g/mL

V = 0.566 mL

Answer

Volume of copper = 0.566 mL

Answer:

2 e

Explanation:

d orbit contain 10 electrons .

Answer:

a. Manganese (IV) sulfide

b. Perchloric acid

c. Ammonium acetate

d. Lithium nitride

e. Sodium peroxide

Explanation:

hope this helps!! p.s. i really need brainliest :)

Answer:

C. To work on the mechanics of a pitchers throw
or... A. To design a stadium with the maximum number of seats

Explanation: