chelp meeee this is science btw but eahhhh

Answer:

836 km

Explanation:

76*11=836

Answer:

836km

Explanation:

76km/hr = 76×1000÷3600= 190/9 m/s

11hours =39600 s

Distance=speed×time

Distance=190/9 × 39600= 836,000m

So distance is 836,000m or 836 km.

This method is possible only if body is moving linearly and the velocity is constant.

If there is uniform acceleration use Newton's laws of motion.

If is acceleration is varying then use calculus methods.

The balanced chemical equation for the given reaction is: 2IrCl3(aq) + 3NaOH(aq) → Ir2O3(s) + 3HCl(aq) + 3NaCl(aq)

Use the atomic masses to translate each element's mass into moles. By dividing the total number of moles by the smallest number of moles, you may determine the ratio or the number of moles of each element.

The mole ratio of the reactants and products are represented by the coefficients in a balanced chemical equation. Hence, the total mole ratio for the indicated reaction is:

2 moles of IrCl3 : 3 moles of NaOH : 1 mole of Ir2O3 : 3 moles of HCl : 3 moles of NaCl

This can also be expressed in simpler terms as:

2:3:1:3:3

As a result, 3 moles of NaOH are needed to completely react with every 2 moles of IrCl3. 3 moles of HCl, 3 moles of NaCl, and 1 mole of Ir2O3 are the end products.

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Answer:

I am not sure which number would be considered correct.

unrounded: 5,427.5559

rounded to the nearest thousandth: 5,427.556

rounded to the nearest hundredth: 5,427.56

rounded to the nearest tenth: 5,427.6

rounded to the nearest whole number: 5,428

Explanation:

112.839 * 48.1 = 5,427.5559

The reaction is exergonic. that is the free energy change delta G for a reaction is -46.11 kJ/mol, the reaction is exergonic.

Chemical thermodynamics, exergonic reactions are chemical reactions in which the change in free energy is negative (there is a net release of free energy).

This shows the spontaneous reaction when the system is closed and the initial and final temperatures are the same.

Reactions can be endergonic or exergonic. Endergonic reactions require heat or energy input. The exergonic reaction is the opposite. it gives off heat. Answer and Explanation:

Reactions with negative values of G are exergonic, meaning they release heat.

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Answer:

i think right artrium but not full aure

As an example of how CO2 is utilized in industry, it is employed as an inert gas in welders and flame extinguishers, as just a pressurizing gas for air cannons and oil recovery, as a supercritical solvent in coffee decaffeination and supercritical drying.

Chemical intermediaries, such as methanol, syngas, & formic acid, can be produced from CO2 using a variety of catalysts. These molecules subsequently act as feedstocks in those other industrial processes.Additionally, CO2 can be converted by catalysts to polymers, which serve as building blocks for plastics, adhesives, & medications.

The creation of ethanol, fertilizer, natural gas processing, hydrogen synthesis in refineries, and, most recently, coal-fired power generation are among the industrial processes where large-scale carbon capture has been shown and is currently in use.

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Answer:

Explanation:

3.81 m. = 150 inches.

I can't find explanation. Hope this is my best!

Answer:

Explanation:

Here, we want to get the name for the given chemical formula

Looking at the formula, we look at the names of the element

The names are sodium and fluorine

We write the name of the metal element first, then the non-metal atom

Thus, we have it as

The balanced chemical equation of the combustion reaction of C₁₆H₃₄ is given below. The heat of combustion of the reaction is - 10699 kJ/mol.

\(\rm C_{16}H_{34} + \frac{49}{2} O_{2} \rightarrow 16CO_{2} + 17 H_{2}O\)

Combustion is a type of reaction, in which a gas or liquid burns in oxygen to give carbon dioxide and water. Combustion is an exothermic reaction. Hence, it evolves heat to the surroundings. The enthalpy of combustion is always negative.

Hydrocarbons gases such as gasoline easily undergo combustion and they can be used as fuels in vehicles where the chemical energy is converted to the mechanical energy.

Here, the given hydrocarbon is C₁₆H₃₄. To balance the combustion reaction. First balance the number of oxygen and hydrogen as in the number of the gas. Then balance the number of oxygen as written below:

\(\rm C_{16}H_{34} + \frac{49}{2} O_{2} \rightarrow 16CO_{2} + 17 H_{2}O\)

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To solve this we must be knowing each and every concept related to atom. Therefore, Bohr's model was abandoned since it lacked explanatory, descriptive, and predictive ability.

Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.

In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. Bohr's model was abandoned in favor of the quantum mechanical model since it lacked explanatory, descriptive, and predictive ability.

Therefore, Bohr's model was abandoned since it lacked explanatory, descriptive, and predictive ability.

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The samples most probably had the lowest solubility, which is defined as 3 the highest concentration of the a solute that may dissolve in a solvent at a particular temperature.

The amount of a substance that will dissolve completely in the most amount of solvent at the specified temperature is known as its solubility. The solubility of distinct substances can differ greatly, and it is a defining characteristic of a particular solute-solvent combination.

One typical example of such a solution is adding sugar cubes to a coffee or tea beverage. Solubility is a characteristic that makes sugar molecules more soluble. Hence, the ability of a material (solute) can dissolve in a liquid is what is meant by the term "solubility."

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Answer:

C. 3

Explanation:

Took the test, got it right.

The Celsius temperature is approximately 47°C.

To solve this problem, we can use the ideal gas law:

PV = nRT

where P is the pressure in atm, V is the volume in liters, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.

This equation can be arranged to solve for T:

T = PV/nR

We are already given P, V, n, and R, so we can put those values and solve for T:

T = (0.853 atm) x (24.5 L) / (0.795 mol) x (0.0821 atm L/mol K)

  = 320 K

To convert the value from Kelvin to Celsius,

T = 320 K - 273.15

  = 46.85°C

Therefore, the Celsius temperature is approximately 47°C.

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Due to a phenomenon known as diamagnetic anisotropy, aromatic protons emit signal(s) in the range of 7-8 ppm.

In aromatic compounds with resonance in the 7–8 ppm range, this impact is more prominent. A ring current is the term for the movement of the p electrons in benzene, and it induces an extra magnetic field that helps the protons. While the signals attributable to its aromatic carbons were seen in the range from 128 to 133 ppm, those for the aromatic phthalate ring protons were seen in the range from 7.63 to 7.82 ppm. ... the cis/trans-cyclohexylene CH carbon signals were detected in the range of 70.8 to 72.3 ppm.

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Answer:

milk, lemon juice, toothpaste and baking soda

Answer:

I'm not entirely sure on this one, but I would think it's 8%

Explanation:

The conversion of the kJ to calorie is :

2.75 × 10⁴ kJ =  6.572 × 10⁶ cal

The conversion is given as :

The kilojoules and the calories both are the unit that will measures the energy. The energy is measure in the kilojoules, kJ.

1) kJ to J

2.75 × 10⁴ kJ = 2.75 × 10⁴ × 1000

                       = 2.75 × 10⁷ J

2) J to calorie

2.75 × 10⁷ J  = 2.75 × 10⁷ × 0.239

                     = 6.572 × 10⁶ cal

Thus, the kJ to the cal conversion is 2.75 × 10⁴ kJ =  6.572 × 10⁶ cal.

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Answer: infinitely many solutions

Explanation: since this equation is the same on both sides, any value that is plugged in for "u" will equal the same amount on both sides.

example) -8 + 3(1) = 3(1) - 8

-8 +3 = 3 + -8

-5 = -5

Answer:

Dalton theorized that the law of conservation of mass and the law of definite proportions could be explained using the idea of atoms. He proposed that all matter is made of tiny indivisible particles called atoms, which he imagined as "solid, massy, hard, impenetrable, movable particles.

Explanation:

The result of the four trials by the student is precise to the actual weight of the lead block.

Since we have been alive for millions of years, we have acquired a sense of measurement, which is necessary for us to comprehend the outside world. Tools that provide scientists a number are necessary for measurements. The issue here is that every measurement, using any measuring device, has some level of uncertainty in the outcome. Error is the name given to this uncertainty. When taking measurements, accuracy and precision are two crucial considerations. These two phrases describe how closely a measurement resembles a value that is understood or accepted.

Accuracy refers to an instrument's capacity to measure exact values. It is, in other words, the degree to which the measured value resembles a standard or real value. Accuracy is possible by obtaining quick readings.

The precision of a substance is defined as the similarity between two or more measurements.

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Answer:

The answer is "all the cells are too small, which is not seen by the naked eye, that's why we use a microscope to see it".

Explanation:

In the given question the choices were missing so, we define the correct answer only.

Cells are the essential building blocks of all living entities. There will be trillions of cells within the body. They construct a body shape, absorb nutrients, transform them into energy, and conduct specialized features.  

It provides stability and guidance, encourages mitotic cell development, encourages active and passive transfer, generates energy, induces metabolic processes, and contraceptive support.

0. 1 M solutions of each of the following salts are: NaCN will be basic, KNO₃ is Neutral, NH₄CI is Acidic, NaHCO₃ is Basic, and Na₃PO₄ will be Basic.

NaCN: Basic, When NaCN dissolves in water, it dissociates into Na+ and CN⁻. The CN⁻ ion can act as a weak base by reacting with water to form OH⁻ and HCN. It will be shown by the following equation:

CN⁻ + H₂O ↔ OH⁻ + HCN

Since the formation of OH⁻ ions leads to an increase in pH, NaCN solution is basic.

KNO₃: Neutral, When KNO₃ dissolves in water, it dissociates into K+ and NO₃⁻. Neither of these ions reacts with water to form H⁺ or OH⁻ ions. Therefore, the solution remains neutral.

NH₄CI: Acidic, When NH₄CI dissolves in water, it dissociates into NH₄⁺ and Cl-. The NH₄⁺ ion can act as a weak acid by reacting with water to form H₃O⁺ and NH₃. It will be shown by the following equation:

NH₄⁺ + H₂O ↔ H₃O⁺ + NH₃

Since the formation of H₃O⁺ ions leads to a decrease in pH, NH₄CI solution is acidic.

NaHCO₃: Basic, When NaHCO₃ dissolves in water, it dissociates into Na⁺ and HCO₃⁻. The HCO₃⁻ ion can act as a weak base by reacting with water to form H₂O and CO₃²⁻. It will be shown by the following equation:

HCO₃⁻ + H₂O ↔ H₂CO₃ + OH⁻ ↔ CO₃²⁻ + 2H₂O

Since the formation of OH⁻ ions leads to an increase in pH, NaHCO₃ solution is basic.

Na₃PO₄: Basic, When Na₃PO₄ dissolves in water, it dissociates into 3Na+ and PO₄³⁻. The PO₄⁻ ion can act as a weak base by reacting with water to form HPO₄⁻ and OH⁻. It will be shown by the following equation:

PO₄³⁻ + H₂O ↔ HPO₄²⁻ + OH⁻

Since the formation of OH⁻ ions leads to an increase in pH, Na₃PO₄ solution is basic.

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This problem is providing the equilibrium reaction between magnesium and carbon and asks for a way to increase the amount of magnesium oxide, a product. Thus, the answer turns out to be decrease the carbon.

In chemistry, when a chemical reaction attempts to go to completion, it might experience a limitation known as equilibrium; a condition where it is not able to proceed any further.

In such a way, for the given reaction:

\(2Mg+CO_2\rightleftharpoons2MgO+C\)

One can see that the increase of magnesium oxide, as required, can be accomplished by either increasing any reactant or removing any product in order to shift the equilibrium towards it.

In such a way, one concludes that the correct choice is decrease carbon as it will shift the reaction towards the product; however, we must keep in mind that neither solid nor liquid species contribute to the equilibrium.

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Explanation:

I think its boron because boron is no. 5 on the periodic table, and it has a two energy levels with three valence electrons

Boron is the element which has three valence electrons and  two energy levels.

Electrons present in an atom revolve in different orbits which are stationary states and are also called as energy levels. The energy levels are numbered as integers which are also called as principal quantum numbers.

Energy of the stationary state is given as E= -R

1/n² where R

is the Rydberg's constant. When an electron is excited, and it moves from lower to higher energy levels there is absorption of energy, while when it moves from higher energy level to lower energy level it radiates or gives out energy in the form of radiation.

They can also be defined as the distances between electron and nucleus of an atom . Electrons present in K energy level have least energy .Energy level diagrams are studied to understand nature of bonding , placement of electrons in orbits and and elemental behavior under certain conditions.

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Answer:

A :))

Explanation:

They should look into the different types of diseases and their effects on society before anything else so they know what type of drugs he should look into.

Answer:

Oxygen, O2 is the limiting reactant.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is given below:

2C6H6 + 15O2 —> 12CO2 + 6H2O

Next, we shall determine the limiting reactant as follow:

From the balanced equation above,

2 moles of C6H6 reacted with 15 moles of O2.

Therefore, 6 moles of C6H6 will react with = (6 x 15)/2 = 45 moles of O2.

From the calculations made above, we can see that it will take a higher amount of O2 i.e 45 moles than what was given i.e 33.75 moles of O2 to react completely with 6 moles of C6H6.

Therefore, O2 is the limiting reactant and C6H6 is the excess reactant.

Answer:

The correct option is;

Cathode rays are deflected towards a positively charged rod

Explanation:

Cathode rays are  beam of electrons emitted from the cathode in a vacuum tube and moving towards the anode, due to the difference in the voltage between the electrodes

The discovery of the electrons was through the proof by Thomson that cathode rays were a negatively charged, previously unknown particle, which was to become known as the electron.

Answer:

Cathode rays are deflected towards a positively charged rod

Explanation:

i took the exam this is correct

Solid sodium combines with solution of magnesium fluoride to form sodium fluoride solution and magnesium metal is adding hydrochloric acid into form magnesium chloride solution and hydrogen gas. A solution could be copper oxide is combined with solid carbon. This forms copper metal and carbon dioxide gas.

The correct statements are that a rock is considered an ore when it contains at least one metallic mineral in sufficient amounts to be extracted profitably and when it contains fluorite or sulfur minerals in sufficient amounts to be extracted profitably.

When it contains at least one metallic mineral in sufficient amounts to be extracted profitably.

When it contains fluorite or sulfur minerals in sufficient amounts to be extracted profitably.

Step-by-step explanation:

When it occurs in sufficient amounts to be used to build roads and buildings: This statement is incorrect. Rocks that are used for construction purposes, such as limestone or sandstone, are not considered ores unless they also contain economically valuable minerals.

Only when it contains lead: This statement is incorrect. Ores are not limited to containing only lead. Ores can contain various metallic minerals, not just lead.

When it contains at least one metallic mineral in sufficient amounts to be extracted profitably: This statement is correct. Ores are rocks that contain valuable metallic minerals in concentrations that make extraction economically feasible. These minerals can include gold, silver, copper, aluminum, zinc, and many others.

Only when it contains iron: This statement is incorrect. While iron ores are commonly known and widely used, ores are not limited to containing only iron. There are numerous other metallic minerals that can be extracted profitably from rocks.

When it contains fluorite or sulfur minerals in sufficient amounts to be extracted profitably: This statement is correct. Fluorite and sulfur are examples of non-metallic minerals that can be extracted profitably from rocks, and if a rock contains these minerals in sufficient quantities, it can be considered an ore.

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