A basketball is hit and experiences a net force of 5N, which causes it to accelerate at 8 m/s2. What is the mass of the basketball?
please i needed

Answer:

about an hour but it might take a little longer it jist depends

Answer:

A distance-time graph shows how far an object has travelled in a given time. Distance is plotted on the Y-axis (left) and Time is plotted on the X-axis (bottom).

The pH of the resulting solution is 1.30 if the total volume of the solution is 25.0 ml.

The volume of solution = 25. 0ml

Molarity of NaOH = 0. 160M

Molarity of HCl = 0. 100M

The balanced equation for the reaction between NaOH and HCl is:

NaOH + HCl → NaCl + \(H_{2} O\)

The number of moles of NaOH = 0.160 M x 0.0250 L = 0.00400 mol

The number of moles of HCl = 0.100 M x 0.0500 L = 0.00500 mol

To calculate the Hydrogen concentration ions are:

[H+] = moles of H+ ions / volume of solution

[H+] = 0.00500 mol / (0.0250 L + 0.0500 L)

[H+]= 0.0500 M

To find the pH of the solution, the formula used is:

pH = \(-log_{H+}\)

pH = \(-log_{0.0500}\)

pH = 1.30

Therefore, we can conclude that the pH of the resulting solution is 1.30.

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The atom has 21 protons because it is neutral and has the same number of protons as electrons. It also has 22 neutrons, which we calculated by subtracting the number of protons from the mass number.

The mass number of an atom represents the total number of protons and neutrons in its nucleus. Since the atom is neutral, it means it has the same number of protons as electrons.

Given that the atom has a mass number of 43, this means it has a total of 43 protons and neutrons. We can determine the number of protons by subtracting the number of neutrons from the mass number.

To find the number of neutrons, we subtract the number of protons from the mass number. Since the atom is neutral and has 21 electrons, which is also equal to the number of protons, we can conclude that it has 21 protons.

Therefore, to determine the number of neutrons, we subtract 21 (number of protons) from 43 (mass number). This gives us 22 neutrons.

In summary, the atom has 21 protons because it is neutral and has the same number of protons as electrons. It also has 22 neutrons, which we calculated by subtracting the number of protons from the mass number.

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The following statements on HPLC modes are true is more polar compounds elute first in normal-phase HPLC (Option E).

The liquid chromatography (HPLC) is a technique in analytical chemistry employed for the separation, identification, and quantification of elements. It is considered a highly sensitive method, and it works by separating the components in a mixture with the assistance of a solvent under high pressure.

There are two modes of HPLC: Reversed-Phase HPLC (RP-HPLC) and Normal-Phase HPLC (NP-HPLC). In RP-HPLC, a nonpolar stationary phase, such as C18, is used, and polar solvents, such as water, are used as mobile phases. Polar stationary phases, such as silica gel, are used in NP-HPLC, while nonpolar solvents, such as hexane, are used as mobile phases.

More polar compounds have a greater affinity for the polar stationary phase than less polar compounds, which have a higher affinity for the nonpolar mobile phase in NP-HPLC. As a result, less polar compounds elute first in normal-phase HPLC.

Thus, the correct option is E.

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Answer: Helium is an type of air that can be used to inflate balloons, balls,  and other things that require air. The carbon dioxide we breath out is similar to this helium.

Hope this helps!

B

The sodium hydroxide (NaOH) solution is a basic solution, so the pH of that solution should be close to 14

then when adding hydrochloric acid (HCl) we start to neutralice the solution, meaning the pH must sift slowly to lower pH.

Assuming both solutions have similar concentration the pH shall shift form basic (above 7) to acid pH (below 7). Until now both B and D images agreed with the explanation given. To chose between them we need to remember that HCl is a very strong acid, which means that in solution will get to very acid solutions (very low pH values) which leaves only B as possible answer

Answer:

180 g NaOH

Explanation:

Step #1 : Use the molarity equation to find moles. The volume is needed in liters, so convert the milliliters to liters.

Molarity (M) = moles (mol) / liters (L) ---->

Molarity (M) x liters (L) = moles (mol)

750 mL NaOH              1    L
                          x    ----------------   =    0.75 L NaOH
                                 1,000   mL

(6 M NaOH) x (0.75 L NaOH) = ? mol

                                                = 4.5 mol NaOH

Step #2 : Find the mass using the moles and the molar mass of the solution. The molar mass can be calculated using the values of the elements on the periodic table.

Molar Mass (g/mol) = grams (g) / moles (mol) --->

Molar Mass (g/mol) x moles (mol) = grams (g)

? g/mol = (22.99 g/mol Na) + (15.999 g/mol O) + (1.008 g/mol H)

? g/mol = 39.997 g/mol NaOH

(39.997 g/mol NaOH) x (4.5 mol NaOH) = ? g

                                                                  = 179.99 g NaOH

                                                                  = 180 g NaOH (2 sig figs)

                                                                  = 200 g NaOH (1 sig fig)

Answer:

C: The solution has become saturated.

Explanation:

The sugar is not dissolving in the tea because the solution has become saturated. Saturation occurs when the concentration of solute (sugar) in a solvent (tea) has reached its maximum limit, beyond which no more solute can dissolve. At this point, the undissolved solute will settle at the bottom of the container. In this case, the tea is unable to dissolve any more sugar, so it stays at the bottom of the glass.

Answer:

C

Explanation:

The number of atoms contained in 1 mole of the hydrogen molecule is  12.044 x 10^23.

The International System of Units uses the mole as the unit of material quantity. How many elementary entities of a particular substance are present in an object or sample is determined by the quantity of that material. It is specified that the mole contains exactly 6.022 × 10^23  elementary entities.

The molecular formula for hydrogen is H2. So there are two atoms in the molecule of hydrogen. One mole of hydrogen molecule contains 6.022x10^23 hydrogen molecules.

This number 6.022×10^23 is called Avagardo Number. This is a constant value. Since there are two hydrogen atoms in a hydrogen molecule hence, one mole of H2 molecule contains (2 x 6.022 x 10^23 = 12.044 x 10^23) atoms.

Therefore, The number of atoms contained in 1 mole of the hydrogen molecule is  12.044 x 10^23.

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Answer:

3.374L

Explanation:

According to Charle's Law:

V1/T1=V2/T2 (At constant pressure and moles)

where V=Volume and T=Temperature.

The temperature must be in kelvin.

K=C°+273

T1=40+273=313K

T2=55+273=328K

By applying the formula, we get:

3.22/313=V2/328

V2=(3.22*328)/313

V2=3.374L

Answer:

4) Neon and Argon

Explanation:

Sodium has 11 electrons, Chlorine has 17.

For both of them to complete their shells Sodium will give one electron to chlorine.

Sodium will become 2,8 in the reaction.

Chlorine will become 2,8,8 in the reaction.

2,8 is the electron configuration of Neon.

2,8,8 is the electron configuration of Argon

In conclusion, to revise the original model based on the results of an experiment, it is necessary to first identify the results, analyze and interpret them, modify the original model, and test the revised model. This process allows for a more accurate representation of the system being studied, and helps to ensure that any conclusions or predictions made based on the model are as reliable as possible.

In order to revise the original model based on the results of an experiment, it is necessary to first identify what those results are and what they indicate. Once the results have been analyzed and interpreted, adjustments can be made to the original model to better reflect the observed data. In revising the original model based on the results of an experiment, it is important to consider the following steps:

Identify the results of the experiment.

This includes any data collected, observations made, and any other relevant information that was gathered during the course of the experiment.

Analyze and interpret the results.

This involves looking for patterns, trends, and relationships in the data to gain a deeper understanding of what it means. It is important to consider any potential sources of error that may have influenced the results, and to account for these in the revised model.

Modify the original model.

Based on the results of the experiment, adjustments can be made to the original model to better reflect the observed data. This may involve adding or removing variables, changing the relationship between variables, or adjusting the parameters of the model.

Test the revised model.

Once the revised model has been developed, it is important to test it to determine whether it accurately reflects the observed data.

This may involve running additional experiments or comparing the revised model to other data sets.

If the revised model accurately reflects the observed data, it can be used to make predictions or draw conclusions about the system being studied. If not, further revisions may be necessary to improve the model's accuracy.

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The element Rhenium is an inner transition element having 75 electrons, 75 protons and 111 neutrons.

The element rhenium is one of the elements that belongs to the inner transition series. The element is known to have total 75 electrons, 75 protons and 111 neutrons. The relative atomic mass of the element have been placed at 186 g/mol.

The element is known to be massive and does form very massive complexes. The complexes of rhenium are very useful in industry. The models of the atom have helped to show the arrangement of the electrons, protons and neutrons in the element.

The protons are positively charged and they are found in the nucleus while the electrons are found shells and are negatively charged. The neutrons in the atom have no charge.

The four fundamental forces are metallic forces that holds atoms of metals together. The ionic bond that holds ions together, the covalent bond that holds atoms together in molecules and the dative bonds that leads to the formation of coordinate compounds.

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An iceberg has a volume of 7670 cubic feet. The mass of the ice (in kg) composing the iceberg is 0.0002483 kg

The volume of iceberg = 7670 cubic feet.

Density of ice = 0.917 g/cm\(^{3}\)

so, Density is given by,

Density = mass / volume

density of ice =  (0.917 /1000) kg/cm\(^{3}\)

1 cm\(^{3}\) = 0.00003531 ft\(^{3}\)

therefore,

0.000917 kg/cm\(^{3}\) = (0.000917 × 0.00003531 ) kg/ft\(^{3}\)

                            = 0.0000000324 kg/ft\(^{3}\)

now,putting the values in formula , we get,

Density = mass / volume

mass = density × volume

         = (0.0000000324 × 7670 ) kg

         = 0.0002483 kg

Hence,An iceberg has a volume of 7670 cubic feet. The mass of the ice (in kg) composing the iceberg is 0.0002483 kg.

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Answer:

insulation is not a method of transfer of jeat

Answer:

insulation

Explanation:

convection, conduction and radiation are all methods of heat transfer.

Answer:

The relative atomic mass of the metal is  207.2 u

Explanation:

Metal chromate

Given that;

1) The mass of fluorine is 14.96% of the metal fluoride

2) 2 Chromium are connected to the metal when the metal chromate, CrO²⁻, is formed

We have;

Number of ions available in the metal =  Cr₂O₇²⁻ = +2 ionic

Molar mass of fluorine = 18.998 g/mole

Ionization of fluorine = -1

Number of moles of fluorine required per metal +2 ion= 2 moles

3) Number of moles of fluorine per mole of compound of the metal fluoride = 2 × moles

Mass of fluorine per mole of compound = 2 × 18.998 = 37.996 grams

Percentage by mass of fluorine = 14.96%

Fluoride

Let the mass of the compound = X

Therefore;

14.96% of X = 37.996 grams

X = 37.996/(0.1496) = 253.984 grams

Therefore the mass of the metal in the compound = 253.984 - 37.996 = Molar mass 215.99 grams

Given that the metal forms a chromate with 2 chromium atoms and a mass of 215.99 grams, the likely candidate is lead, Pb with a molar mass of 207.2 grams and a chromate of Pb(CrO₄)₂.

The fluoride, lead fluoride, F₂

The relative atomic mass of lead is 207.2 u

Answer:

Water is a remarkable substance, and its unique properties are largely due to the presence of polar covalent bonds and hydrogen bonds in its structure. These characteristics play a crucial role in the physical and chemical properties of water, making it essential for life as we know it.

Explanation:

The polar covalent bonds in water arise from the unequal sharing of electrons between oxygen and hydrogen atoms. This results in the oxygen atom having a partial negative charge (δ-) and the hydrogen atoms having partial positive charges (δ+). These charges create polarity within the water molecule, leading to the formation of hydrogen bonds.

Hydrogen bonds occur when the partially positive hydrogen atom of one water molecule is attracted to the partially negative oxygen atom of another water molecule. These hydrogen bonds are relatively weak individually, but when present in large numbers, they contribute to the cohesion, surface tension, and high boiling point of water.

The importance of these bonds is manifold. The cohesion between water molecules due to hydrogen bonding enables water to form droplets, have a high surface tension, and flow freely, facilitating transport within organisms and in the environment. Additionally, hydrogen bonding leads to the high specific heat capacity and heat of vaporization of water, making it an effective regulator of temperature in living organisms and ensuring stable environmental conditions.

Furthermore, hydrogen bonds play a crucial role in the unique properties of water as a solvent. The polar nature of water allows it to dissolve a wide range of substances, including ionic compounds and polar molecules, facilitating various biological processes such as nutrient transport and chemical reactions in cells.

I'm really sorry but you didn't provide any options...

The specific heat of the unknown metal is approximately 0.338 J/(g·°C).The specific heat (c) of a substance is defined as the amount of heat required to raise the temperature of 1 gram of the substance by 1 degree Celsius.

To find the specific heat of the unknown metal, we can use the formula:

q = mcΔT

where q is the amount of heat transferred, m is the mass of the metal, c is the specific heat of the metal, and ΔT is the change in temperature.

In this problem, we are given the following information:

q = 48.0 J

m = 11.9 g

ΔT = 24.9 °C - 13.0 °C = 11.9 °C

Substituting these values into the formula, we get:

48.0 J = (11.9 g) c (11.9 °C)

Solving for c, we get:

c = 48.0 J / (11.9 g × 11.9 °C) ≈ 0.338 J/(g·°C)

Therefore, the specific heat of the unknown metal is approximately 0.338 J/(g·°C).

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Algae blooms are most often caused by eutrophication.

Algae blooms are are dense layers of tiny green plants that occur on the surface of lakes and other bodies of water when there is an overabundance of nutrients (primarily phosphorus) on which algae depend.

Algae species tend to proliferate in growth (bloom) in the presence of abundance nutrients. This abundance of nutrients is as a result of a process called eutrophication.

Eutrophication is the ecosystem's response to the addition of artificial or natural nutrients, mainly phosphates, through detergents, fertilizers, or sewage, to an aquatic system.

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Answer:

Group 15

Explanation:

The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers such as plants, algae, and cyanobacteria use the energy from sunlight to make organic matter from carbon dioxide and water. This establishes the beginning of energy flow through almost all food webs.

The weight percentages of sodium chloride is 23.1 % and water is 76.9 % in the solution. The theoretical density of the initial concentrated solution is 0.30 g/mL.

The mass of the sodium chloride = 30 g

The mass of the water = 100 mL = 100 g

The total mass = 30 + 100

                         = 130 g

The mass percentage of sodium chloride = (30 / 130 ) × 100 %

                                                                        = 23.1 %

The weight percentage of the water = ( 100 / 130 ) × 100 %

                                                             = 76.9 %

The density of the solution = mass / volume

                                             = 30 / 100

                                            = 0.30 g/mL

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In the reaction H2O2 (aq) → H2O(l) + ½ O2 (g), the initial concentration of hydrogen peroxide is 0.2546 M, and the initial rate of the reaction is 9.32×10^-4 M/s.

To find the concentration of H2O2 at t = 0.58 min, follow these steps:
1. Convert the time to seconds:

0.58 min * 60 s/min = 34.8 s
2. Calculate the change in concentration:

Change in concentration = Initial rate × Time = 9.32×10^-4 M/s × 34.8 s = 0.0324 M
3. Subtract the change in concentration from the initial concentration:

[H2O2] = Initial concentration - Change in concentration = 0.2546 M - 0.0324 M = 0.2222 M

So, the concentration of H2O2 at t = 0.58 min is 0.2222 M.

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