if a baseball player hits a baseball from 4 feet off the ground with an initial velocity of 64 feet per second, how long will it take the baseball to hit the ground? use the equation h= -16t^2+4t + 4 round your answer to the nearest tenth hundredth​

Answer:

mass of iron in grams  = 1.493×\(10^{-23}\) g

Explanation:

Since one mole of anything is equal to 6.022×\(10^{23}\) of that thing, we can apply that to atoms as well. 1 mol of iron = 55.85g. i.e. the molar mass of iron = 55.85g/mol.

To find the number of moles present, we can divide the number of atoms by the number of atoms in 1 mole, i.e Avogadro's Constant (6.022×\(10^{23}\)).

\(\frac{N}{N_{A}} = n\)

∴ n(Fe) = 502/6.022×\(10^{23}\) = 8.3361×\(10^{-22}\) mol of iron

Finally, to find the mass of iron present, we can divide the number of moles by the molar mass.

\(\frac{n}{M}} = m\)

∴ m(Fe) = 8.3361×\(10^{-22}\)/55.85 = 1.493×\(10^{-23}\) g. (4 sig. fig.)

Answer: the answer is b

Explanation:

Answer:

Explanation:

B answer

Answer:A large number of autotrophic bacteria—bacteria that produce their own food—live near hydrothermal vents and submarine volcanoes.

These bacteria are considered chemosynthetic, meaning they produce food from chemical reactions usually involving carbon dioxide, oxygen, or hydrogen

The pressure exerted by the gas in the container at 25°C and a volume of 0.044 L is approximately 4.96 atm.

To calculate the pressure exerted by a gas at 25°C in a volume of 0.044 L with 0.007 moles of gas in the container, you can use the ideal gas law equation: PV = nRT.

The ideal gas law equation is PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin. In this case, you have V = 0.044 L, n = 0.007 moles, and T = 25°C (which is equivalent to 298 K). The ideal gas constant R is 0.0821 L·atm/mol·K.

Now, plug in the given values into the equation:

P × 0.044 L = 0.007 moles × 0.0821 L·atm/mol·K × 298 K

To solve for P, divide both sides by 0.044 L:

P = (0.007 moles × 0.0821 L·atm/mol·K × 298 K) / 0.044 L

P ≈ 4.96 atm

The pressure exerted by the gas in the container at 25°C and a volume of 0.044 L is approximately 4.96 atm.

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Answer:

\(\boxed {\boxed {\sf 6.4 \ atm}}\)

Explanation:

We are asked to find the pressure of a gas in a can given a change in temperature. We will use Gay-Lussac's Law, which states the pressure of a gas is directly proportional to the temperature. The formula for this law is:

\(\frac {P_1}{T_1}= \frac {P_2}{T_2}\)

Initially, the gas in the aerosol can has a pressure of 3.10 atmospheres at a temperature of 25 degrees Celsius.

\(\frac { 3.10 \ atm}{25 \textdegree C}=\frac{P_2}{T_2}\)

The temperature is increased to 52 degrees Celsius, but the pressure is unknown.

\(\frac { 3.10 \ atm}{25 \textdegree C}=\frac{P_2}{52 \textdegree C}\)

We are solving for the new pressure, so we must isolate the variable \(P_2\). It is being divided by 52 degrees Celsius. The inverse operation of division is multiplication, so we multiply both sides of the equation by 52 °C.

\(52 \textdegree C *\frac { 3.10 \ atm}{25 \textdegree C}=\frac{P_2}{52 \textdegree C} * 52 \textdegree C\)

\(52 \textdegree C *\frac { 3.10 \ atm}{25 \textdegree C}=P_2\)

The units of degrees Celsius cancel.

\(52 *\frac { 3.10 \ atm}{25}=P_2\)

\(52 *0.124 \ atm = P_2\)

\(6.448 \ atm = P_2\)

The original values of pressure and temperature have 2 and 3 significant figures. Our answer must be rounded to the least number of sig figs, which is 2. For the number we calculated, that is the tenths place. The 4 in the hundredth place tells us to leave the 4 in the tenths place.

\(6.4 \ atm \approx P_2\)

The gas pressure in the can at 52 degrees Celsius is approximately 6.4 atmospheres.

The number of moles of the cyclopropane that remains after 1.00 s is  6.1 * 10^-4 M.

By the use of the equation of the first order reaction, we can be able to find out the concentration at a given time.

The equation of the first order reaction can be written as;

ln[A] = ln[Ao] - kt

[A] = Concentration at time t

[Ao] = Initial concentration

k = rate constant

t = time

Then;

[A] = e^ln[Ao] - kt

[A] = e^ln6.00 - (9.2 * 1)

[A] = 6.1 * 10^-4 M

The amount of the cyclopropane left is  6.1 * 10^-4 M.

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Any carbon substituent formed by removing one hydrogen from an alkane is called an alkyl group.

An alkane is a type of hydrocarbon that contains only single bonds and has the general formula \(CnH_{2}n+2\). When one hydrogen atom is removed from an alkane, the resulting carbon group is called an alkyl group. The name of the alkyl group depends on the number of carbon atoms in the group and the location of the removed hydrogen.

For example, \(CH_{3}CH_{2}CH_{2}\)- is a propyl group, while \(CH_{3}\)- is a methyl group. Alkyl groups are commonly used as substituents in organic chemistry and can greatly influence the chemical and physical properties of a molecule.

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Answer:

It's 1, places that are closer to the equator receive more direct sunlight and have

Explanation:

Answer:

Wavelength can be calculated using the following formula: wavelength = wave velocity/frequency. Wavelength usually is expressed in units of meters. The symbol for wavelength is the Greek lambda λ, so λ = v/f.

Explanation:

Just a formula that's commonly used in biology.

Answer:

i think they would be all the same

Explanation:

they sound like sugars

Answer:Landslide

Explanation:

Just did this question.

Answer:

tn

Explanation:

The location of resources a concern, because some areas have more access to resources than others, Human populations are sometimes concentrated in areas that are lacking resources, and areas with fewer resources may need to buy resources from other areas. Therefore, option D is correct.

Natural resources are substances obtained from the planet that are utilised to sustain life and provide for human needs. A natural resource is something that comes from nature that humans use.

Natural resources include things like stone, sand, metals, oil, coal, and natural gas. Air, sunshine, soil, and water are examples of other natural resources.

Resources are more easily accessible in some places than others. There are periods when human populations are concentrated in places with few resources. Localities with limited resources could be forced to import resources.

Thus, option D is correct.

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The given reaction is the calcium carbide reaction of calcium hydroxide with water to produce acetylene.

The balanced equation is CaC2+2H2OCa(OH)2+C2H2.

Molar mass of acetylene, C2H2 = 2x12+2x1 = 26 g/mol

we get 64 g of CaC2 becomes 26 g of C2H2. 5.0g CaC2..

Molecular weight of Ca(OH)2=1(atomic weight of Ca)+2(atomic weight of O)+2(atomic weight of H)=40+2(16)+2(1)=40+32+2=74.

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The acid that will react with strontium hydroxide to produce strontium chloride in a neutralization reaction is hydrochloric acid (HCl).

When strontium hydroxide reacts with hydrochloric acid, the products formed are strontium chloride (SrCl2) and water (H2O). The chemical equation for the neutralization reaction is as follows:

Sr(OH)2 + 2HCl → SrCl2 + 2H2O

Here, Sr(OH)2 is the base (strontium hydroxide) and HCl is the acid that undergoes a neutralization reaction. The products formed are a salt (strontium chloride) and water.

Neutralization reactions are a type of chemical reaction that occurs when an acid reacts with a base to form a salt and water.

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Answer:

If the mass of carbon in the signature is 10-12g, calculate. the number of carbon atoms in the signature. the answer is 5.01 x 10^10 atom.

Explanation:

wlcm

please mark me as brainliest

Answer:

let the number be x

so (x+6)/3 =5

x+6=15

x=9

Answer: It’s the 3rd one

The elements of period 5 is best described as the Highly reactive metals, Relatively nonreactive metals, Metalloids, Reactive nonmetals, Nonreactive gases.

The elements of period 5 include metals and nonmetals,

For example-

Therefore, the elements of period 5 is best described as the Highly reactive metals, Relatively nonreactive metals, Metalloids, Reactive nonmetals, Nonreactive gases.

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Answer:

c = λ f

c is the speed of light, λ the wavelength in meters, and f equals the frequency in cycles per second.

Explanation:

Answer:

The signal from the deceleration sensor ignites the gas-generator mixture by an electrical impulse, creating the high-temperature condition necessary for NaN3 to decompose. The nitrogen gas that is generated then fills the airbag. hope that helps love!

Taking into account the definition of avogadro's number, there are 312.14 grams in 9.40×10²⁵ molecules of H₂.

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 molecules are contained in 1 mole of H₂, then 9.40×10²⁵ molecules are contained in how many moles of H₂?

amount of moles of H₂= (9.40×10²⁵ atoms × 1 mole)÷ 6.023×10²³ atoms

amount of moles of H₂= 156.07 moles

On the other hand, molar mass is the amount of mass that a substance contains in one mole. In this case, the molar mass of H₂ is 2 \(\frac{g}{mole} \).

Then the mass that 156.07 mole of compound contains is calculated as:

156.07 moles×2 \(\frac{g}{mole} \)= 312.14 grams

Finally, there are 312.14 grams in 9.40×10²⁵ molecules of H₂.

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Answer:

Sinkholes this is the answer

Answer:

B. Mining

Explanation:

trust

Answer:

3 g/cm3

Explanation:

d=m/v

=45/15

= 3 g/cm3

Answer:

2.46621 cm

Explanation:

i used the formula p = m/V

We know that compound m melts at 112 degrees Celsius, which is the same melting point range as 3-nitroaniline and 4-nitrophenol. However, we also know that a mixture of compound B and 4-nitrophenol melts at a lower temperature range of 90-98 degrees Celsius, indicating that compound B is not m. Therefore, we can conclude that compound m is either 3-nitroaniline or 4-nitrophenol. However, we cannot determine which one it is with the given information. Therefore, the answer is d) cannot be determined.

Celcius is a unit of measurement for temperature, named after the Swedish astronomer Anders Celsius. It is defined by the following formula: C = (F - 32) x 5/9, where F is the temperature in degrees Fahrenheit and C is the temperature in degrees Celsius. One degree Celsius is equal to 1.8 degrees Fahrenheit or 274.15 kelvins.

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Answer:

I'm not 100% sure but i would guess global warming if anything

Explanation:

please do not put this as your answer if your not sure if its correct

The process of nuclear fusion will occur.

Under immense pressure and heat, protons at the center of an object can undergo a process called nuclear fusion, where two or more atomic nuclei combine to form a heavier nucleus, releasing a large amount of energy in the process. This is the process that powers stars, including our sun.

In the core of a star, for example, the immense pressure and heat cause hydrogen nuclei (protons) to collide and fuse together to form helium nuclei. This process releases a tremendous amount of energy in the form of light and heat, which ultimately keeps the star shining and stable.

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Answer:

As for my own understanding. I think the answer I B= because it has three valence electron

This will have a substantial impact on the projected molecular weight of the unknown because the calculations will not account for the mass of the test tube and p-xylene. This indicates that the mass of the unknown that is actually used to determine the molecular weight will be less than the real value, leading to an incorrectly low computed molecular weight. This is done  by determining freezing point.

The addition of a solute to a solvent will decrease the freezing point (temperature) of the solvent. The decrease in freezing point (ΔTf) when a nonvolatile, nonionizing  solute is dissolved in a solvent is proportional to the molal concentration, m, of the solute present in the solution.

ΔTf IS Directly proportional to atomic mass (m)

ΔTf = Kf × m

Kf is a constant for a given solvent. Kf is called the molal freezing point depression constant and represents how many degrees the freezing point of the solvent will change when 1.00 mole of a nonvolatile nonionizing  solute dissolves in one kilogram of solvent.

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All of the above are true as regards carbon bonds in organic compounds and is denoted as option 5.

These are chemical compounds which contain carbon-hydrogen or carbon-carbon bonds. Carbon has four valence electrons which makes it tetravalent and able to form multiple bonds.

They can form multiple bonds and branched chains in hydrocarbons such as alkanes, alkenes and alkynes during reactions.

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Answer: