74 POINTS to whoever can balance all these equations

please I need this done as fast as you can I'm in a pinch for time.

Thanks

Accuracy refers to the closeness of a measured value to a standard or known value. Precision is independent of accuracy. You can be very precise but inaccurate.

Answer:

Both terms are related and they are really important in the science field to measure how successful can be an experiment.

First, the accuracy is the relation to express how close is the value that I measure in an experiment from a real value that it has been already proved.

For example: I measure the volume of a soda can in my lab and I found that this soda can has 235 mL inside but the packing says that has 230 mL. So it means that my measure data it is not accurate.

Thus, the accuracy is important because gives me validity of my designed experiment.

Second, the precision is the relation between my datas and how far are they from each other.

For example: Taking again the example of the soda can, I was in the lab measuring the volume and I made it 3 times. My datas were: 235 mL, 220mL, and, 210 mL. So it means that my measures are far from each other so it is not precise.

Precision is important because gives reliability to the experiment.

There is also mathematical approximations to measure accuracy and precision, the accuracy can be measure finding the error and the precision can be measure by a standard deviation that means how far are my datas from the average.

The most damage from a hurricane typically occurs when it makes landfall.

When a hurricane nears land, several factors contribute to the potential damage it can cause:

Wind Speed: As a hurricane moves onto land, its sustained winds can cause structural damage to buildings, infrastructure, and vegetation. The wind speed at landfall is a crucial factor in determining the extent of the damage.

Storm Surge: Hurricanes generate a significant storm surge, which is the abnormal rise in seawater levels along the coast. This surge, combined with the normal tides, can inundate coastal areas, causing flooding and erosion.

Rainfall: Hurricanes produce heavy rainfall, leading to widespread flooding, particularly in low-lying areas and regions with inadequate drainage systems.

Tornadoes: Hurricanes can spawn tornadoes, which can cause localized destruction within the storm's path.

To estimate the potential damage caused by a hurricane, meteorologists and disaster management agencies consider these factors along with the hurricane's intensity, forward speed, and the population density of the affected areas.

Answer is: B) The cart will move to the left.

A newton (N) is the International unit of measure for force.

One newton is the force needed to accelerate one kilogram of mass at the rate of one metre per second squared in direction of the applied force.

The cart will move to the left by the force of 2 newton.

F(cart) = 7 N - 5 N.

F(cart) = 2 N to the left.

Final answer:

The solution in question is a gaseous solution, and the application of Henry's Law is used to determine the changes in solubility of gases in water based on pressure changes.

Explanation:

The student determined that 8.2 milligrams of oxygen is dissolved in a 1000 gram sample of water at 15 degrees Celsius and 1 atm, which is an example of a gaseous solution. In the context of the given homework questions, this pertains to the application of Henry's Law which describes the solubility of a gas in a liquid at a given temperature is directly proportional to the partial pressure of the gas above the liquid. To determine the solubility under different conditions, you start by using the given solubility at known conditions and calculate the Henry's law constant. Then you can use this constant to find the new solubility when the pressure changes.

Henry's Law is used to determine the changed solubility when the pressure of the gaseous solute is increased from 20.26 kPa (152 torr) to 101.3 kPa (760 torr). This results in a new solubility of 7.25 × 10⁻³ g in 100.0 mL, or 0.0725 g/L. For the Application of Henry's Law and Solution examples at 20 °C, the concentration of dissolved oxygen in water is determined based on its partial pressure changes using the established Henry's law constant.

The answer is 2

2H2 + 2O2 -2H2O

2 H2 + 1 O2 = 2 H2O

B. 2 is the correct option

Your answer is strontium

Answer is: copper (Cu).

Gold (Au) and silver (Ag) are noble metals and fall into the transitional metal family on the periodic table in group number 11.

Group 11 is also known as the coinage metals, due to their former usage.

Copper, silver and gold all occur naturally in elemental form.

Copper has atomic number 29, it has 29 protons and 29 electrons.

Electron configuration of copper atom: ₂₉Cu [Ar] 3d¹⁰ 4s¹.

Copper (Cu) is higher in activity series than silver and gold, so copper lose electron and silver gain electrons.

Answer : The correct option is, (D)

Explanation :

Balanced reaction : Balanced reactions are those reactions when the number of different atoms of the element present in the reactant sides is equal to the product sides.

The given unbalanced reaction is,

[tex]Zn+K_2CrO_4\rightarrow K+ZnCrO_4[/tex]

The balanced chemical reaction is,

[tex]Zn+K_2CrO_4\rightarrow 2K+ZnCrO_4[/tex]

Therefore, 1, 1, 2, 1 are the coefficients that would correctly balance this equation.

To balance the chemical equation Zn + K2CrO4 > K + ZnCrO4, the correct coefficients should be: 1 Zn, 1 K2CrO4, 2 K, and 1 ZnCrO4. Therefore, the answer is D. 1,1,2,1.

The balancing of chemical equations involves ensuring that there is an equal number of each type of atom on both sides of the reaction. This equality is fundamental to the Law of Conservation of Mass. In case of the equation Zn + K2CrO4 > K + ZnCrO4, here's how you balance the equation:

Therefore, the correct coefficients are: 1 Zn, 1 K2CrO4, 2 K, and 1 ZnCrO4, so the choice D. 1,1,2,1 is the correct one.

https://brainly.com/question/28294176

#SPJ11

the right equation is 2NH3 -> N2+3H2

Answer:

No, it is:

[tex]2NH_3\rightarrow N_2+3H_2[/tex]

Explanation:

Hello,

In this case, all the given equation could be simplified by a factor of two to yield:

[tex]\frac{4}{2} NH_3 \rightarrow \frac{2}{2} N_2+\frac{6}{2} H_2[/tex]

Therefore, the answer is no, so it the lowest one is:

[tex]2NH_3\rightarrow N_2+3H_2[/tex]

Regards.

2VCl2 + 3Cl2 -> 2VCl5

Reactants: 2VCl2 and 3Cl2

Product: 2VCl5

To balance the equation, set up a chart with the reactants and products on separate sides. On one side should be V - 1 and Cl - 4 with a line and on the right side should be V - 1 and Cl - 5.

The numbers correspond with the subscripts. To balance, use the biggest compound (VCl5) and multiply that by 2 in order to get an even number for both of 2 and 10. For the reactants, you now need to multiply to get corresponding amounts.

Hope this helps!

Answer: Reactants: 2VCl2 and 3Cl2; product: 2VCl5

Explanation:

George Johnstone Stoney

George Johnstone Stoney

Answer:

Q1. D) A single replacement reaction takes place because sodium is more reactive than hydrogen.

Explanation: [tex]2Na+2H_2O\rightarrow 2NaOH+H_2[/tex] Sodium metal reacts with water to givesodium hydroxide and hydrogen gas. A single replacement reaction takes place because sodium is more reactive than hydrogen.  

Sodium easily lose electrons than hydrogen and get oxidized to [tex]Na^+[/tex] and [tex]H^+[/tex] get reduced to give [tex]H_2[/tex] .

Q2. B) It is a single replacement reaction, and the cations in the two ionic compounds are different.

Explanation: [tex]3Na+AlCl_3\rightarrow 3NaCl+Al[/tex] where Sodium is a metal and [tex]AlCl_3[/tex] is an ionic compound. Na being more reactive than Al, displaces it from its salt solution.

Q3. D) [tex]Zn+H_2SO_4\rightarrow ZnSO_4+H_2[/tex]

Explanation: A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution.Thus zinc can easily lose electrons as compared to hydrogen and result in the formation of zinc sulfate and hydrogen.

Q4. False

[tex]Zn+CaCl_2\rightarrow[/tex]no reaction

Explanation: As zinc lies lower in reactivity series, it is less reactive than calcium. It will not be able to displace calcium from its salt and hence no reaction occur. Thus the given statement is false.

Q5. False

Explanation: A double displacement reaction is one in which exchange of ions take place.  Thus an element replaces another element and not same element.

A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution. Thus one element should be different from another element.

Q6. A)[tex]Na_3PO_4+3KOH\rightarrow  3NaOH+K_3PO_4[/tex], because K retains the same charge throughout the reaction

Explanation: A balanced chemical reaction is one in which the number of atoms on both sides of a chemical equation are same. Also K has an oxidation state or charge of +1 in [tex]KOH[/tex] as well as [tex]K_3PO_4[/tex]

Answer:

Q1: A single replacement reaction takes place because sodium is more reactive than hydrogen.

Explanation:

When the sun, moon, and Earth are in alignment (at the time of the new or full moon), the solar tide has an additive effect on the lunar tide, creating extra-high high tides, and very low, low tides—both commonly called spring tide

High tides occur during spring tides when the Sun, Earth, and Moon are aligned, either during new or full moon phases. Low tides occur during neap tides when the Sun and Moon are at right angles with respect to the Earth, typically during the moon's first and third quarters.

Tides are mostly affected by the gravitational pull of the Moon and the Sun on Earth's oceans. High tides, known as spring tides, occur when the Sun, Earth, and Moon are in a straight line. This alignment can happen during the new moon or full moon phases.

Conversely, low tides, referred to as neap tides, occur when the gravitational forces of the Sun and the Moon are perpendicular to each other, which takes place during the first and third quarters of the Moon's phases.

During spring tides, the gravitational forces of the Sun and the Moon combine to create higher-than-average high tides and lower-than-average low tides. During neap tides, the Sun and the Moon's gravitational forces offset each other, resulting in tides that are not as extreme. Therefore, high tides are strongest when the Sun and the Moon are aligned, while low tides are weakest when the Sun is at 90° to the Earth-Moon alignment.

Molar mass of CHCl3 is

sum of atomic mass of all the atoms in it.

= C + H + 3 Cl

= 12.0107 + 1.008 + 3 (35.453) = 2.0107 + 1.008 +   106.359

= 119.38 g/mol

Molar mass of CHCl3 is 119.38 g/mol

Bromine is one of the members of the halogen family of elements. The other members belonging to the same family comprise chlorine, fluorine, and iodine. Like the other members of the family, bromine comprises seven electrons in its outermost shell and is very reactive.  

Bromine can be witnessed in various salt compounds with alkali metals. Like all reactive elements, bromine is never found solitary in nature. It always forms a part of a compound with other elements.  

Means that the African continent was once in the higher latitudes, and in contact with Antarctica, where glaciers form due to the low temperatures in the poles. The continent drifted over time due to tectonic plate movement. Continental drift is powered by the convection current in the mantle of the earth.

Dmitri Mendeleev organized elements by atomic mass and recurring properties, leaving gaps for undiscovered elements whose properties he predicted accurately.

Dmitri Mendeleev, a chemistry professor, developed the precursor to today's periodic table in 1869. His key breakthrough was arranging the elements not just by their atomic masses but also by the repeating patterns in their properties.

This innovative approach allowed him to leave gaps in the table, predicting that these gaps would later be filled with newly discovered elements.

Mendeleev predicted the properties of these yet-to-be-discovered elements based on the patterns observed in known elements, which included properties such as masses, boiling points, and densities.

When elements like gallium, scandium, and germanium were discovered with properties very close to his predictions, it validated the significance of his periodic table.

A reaction where one becomes two

2H202 --> 2H2O + O2

Final answer:

The general form of a decomposition reaction is AB ⇒ A + B.

Explanation:

The general form of a decomposition reaction is when a single compound breaks down into two or more simpler substances. These products can be elements, compounds, or a mixture of both. A common way to represent a decomposition reaction is using the formula AB ⇒ A + B, where AB is the original compound and A and B are the simpler substances that are produced.

Decomposition reactions can release energy, often symbolized as AB ⇒ A + B, where AB represents the substrate, A and B are products, and the energy is released when covalent bonds within the substrate are broken. For example, the thermal decomposition of gaseous [tex]N_{2}[/tex] [tex]O_{5}[/tex] to  [tex]NO_{2}[/tex] and [tex]O_{2}[/tex] can be represented as [tex]2N_{2}O_{5}[/tex](g) ⇒ 4[tex]NO_{2}[/tex](g) + [tex]O_{2}[/tex](g). This demonstrates the breaking of bonds between components of a larger molecule to form smaller product molecules.

Carbon Dioxide is the most common reason water becomes full of alkaline. Hopefully  I could help :)

Answer: Chemicals become positively charged by loosing electrons.

Explanation: There are three types of compounds:

1) Neutral compounds: These are the compounds where equal number of protons and electrons are present.

2) Positive compounds: These are the compounds where number of protons are more than the electrons. These are considered as cations.

3) Negative compounds: These are the compounds where number of electrons are more than the protons. These are considered as anions.

So, in order to have a positive charge on a compound, that compound has to loose electrons, so that the number of protons gets higher than the number of electrons.

option a

mg atomic number is 12

the electronic configuration is 2, 8, 2

Oxygen atomic number is 8

the electronic configuration is 2,7

the magnesium will try to give away 2 electron to get to the form of noble gas configuration, hence oxygen needs one more to get to noble gas hence it will take two elements of oxygen to form MgO.

Answer:

1500 m/s  

Step-by-step explanation:

The formula for the period T of a wave is

  T = 1/f      Invert each side

(1) f = 1/T

The formula relating frequency f and wavelength λ is

(2) fλ = v     Substitute (1) into (2)

     v = λ/T

Data:

λ = 9 m; T = 0.006 s

Calculations:

v = 9/0.006

v = 1500 m/s

Charles law states a proportional relationship between volume and temperature.

[tex]\frac{V_{1} }{T_{1} } =\frac{V_{2} }{T_{2} }[/tex]

V1= 100mL=0.1L

V2=400mL=0.4L

T1=80'c+273=353K

T2=?

T2=1412K-273=1139'C

Im pretty sure austin texas is the closest place to the epicenter

The epicenter is the point on the Earth's surface directly above where an earthquake or underground explosion originates. The nearest city to the epicenter will likely experience significant effects of the event. For example, San Francisco was near the epicenter of the 1906 earthquake.

The question does not provide a specific location or event, which makes it difficult to give a definite answer. In general, the term epicenter is used in geology, specifically in the context of earthquakes. It refers to the point on the Earth's surface directly above the point where an earthquake or other underground explosion originates—this point is known as the focus or hypocenter. Usually, the city near the epicenter of an earthquake will most likely experience the strongest shaking and highest degree of damage.

For example, if we were discussing the 1906 San Francisco earthquake, then San Francisco would be the city near the epicenter.

https://brainly.com/question/11222669

#SPJ2

Final answer:

During a flood, the water table rises, causing the zone of saturation to expand and the zone of aeration to diminish as the subsurface becomes increasingly waterlogged, which can have varying impacts on the ecosystem.

Explanation:

During a flood, the water table, zone of saturation, and zone of aeration undergo significant changes. The water table is the boundary between the zone of saturation, where the pore spaces in the ground are fully saturated with water, and the zone of aeration, where the pores are mainly filled with air. When a flood occurs, excessive rainwater and overflowing water bodies lead to an increase in ground saturation, causing the water table to rise temporarily. In such circumstances, the zone of saturation expands while the zone of aeration diminishes because more of the subsurface becomes waterlogged.

Flooding can also have various effects on the surrounding ecosystems and landscape. Sudden changes in water table levels can lead to soil saturation, impacting plant survival and depending on their adaptations to waterlogged conditions. Ecosystems dependent on stable groundwater levels, such as riparian areas near rivers, may experience stress or damage from the altered hydrological dynamics caused by flooding.

Answer:

The hydrogen produces the smaller amount of ammonia.  

Step-by-step explanation:

We are given the masses of two reactants, so this is a limiting reactant problem.

We know we will need a balanced equation with masses and molar masses, so let’s gather all the information in one place.  

M_r:      28.02   2.016     17.03

                 N₂  +  3H₂ ⟶ 2NH₃

Mass/g:   70.0    7.00

1. Calculate the moles of N₂ and H₂

Moles N₂ = 70.0 × 1/28.02  

Moles N₂ = 2.498 mol N₂  

Moles H₂ = 7.00 × 2.016  

Moles H₂ = 3.472 mol N₂  

=====

2. Calculate the moles of NH₃ from each reactant

From N₂:

The molar ratio is 2 mol NH₃/1 mol N₂

Moles of NH₃ = 2.498 × 2/1

Moles of NH₃ = 4.996 mol NH₃

From H₂:

The molar ratio is 2 mol NH₃/3 mol H₂  

Moles of NH₃ = 3.472 × 2/3  

Moles of NH₃ = 4.139 mol NH₃

======  

3. Identify the limiting reactant

The limiting reactant is H₂, because it produces fewer moles of NH₃.

The net force acting on the object and the mass of the object affect the acceleration of an object. Therefore, option (D) is correct.

Acceleration of an object can be described as the change in the velocity of an object with respect to time. The acceleration of a body is a vector quantity carry both magnitude and direction. Acceleration is also defined as the second derivative of the position of the object w.r.t. time and the first derivative of the velocity of an object w.r.t. time taken.

According to Newton's second law, the force acting is equal to the multiplication of the mass and acceleration of an object.

F = ma

And,   a = F/m

Therefore, acceleration (a) is inversely proportional to the mass (m) of the body and directly proportional to the applied force.

Therefore, the mass of the object and net acting force affects the acceleration of an object.

Learn more about acceleration, here:

brainly.com/question/3046924

#SPJ3

The correct answer is option D, that is, magma is injected into surrounding rock producing an igneous intrusion.  

Magma refers to a semifluid or fluid substance within or underneath the crust of the Earth from which the formation of lava and other igneous rocks takes place by cooling. Igneous intrusion produces when the magma from beneath the Earth's surface is gradually pushed up to occupy the cracks or spaces between the rocks and solidifies and cools down prior of reaching to the Earth's surface.  

Answer: Sedimentary rocks

Explanation: Relative dating is a method which is used to determine the geological events that has taken place in the past. It does not give the exact age but can depict about the time when the organisms or the object occurred in the geological time scale. It is very useful on the sedimentary type of rocks.

It helps in describing the stratigraphy of a particular area. And this sedimentary rocks can trap fossils in it that are helpful in determining the past events.

the mass of ice taken = 10 g

the mass of water = 250 g

initial temperature of water = 20 C

the final temperature of water = 16. 8 C

specific heat of water = 4.18 J/g*K

the heat absorbed by ice to melt = heat loss by water

heat loss by water = mass X specific heat of water X change in temperature

heat loss by water = 250 X 4.18 X (20-16.8) = 3344 Joules

heat gained by ice = 3344 J

heat gained by ice = enthalpy of fusion X moles of ice

moles of ice = mass / molar mass = 10 / 18 = 0.56 moles

enthalpy of fusion = 3344 / 0.56 = 5971.43 J / mole