Define the term Planck constant?

Q: Determine the pressure exerted by hydrogen bromide (HBr) gas having a density of 2.978 g/L at a…

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Q: 6. 1.703 g Al reacts with 1.95 mL of H,SO, at 30.0°C and 611.1 kPa. Calculate the mass of Al,(SO,J,…

A: Given,  Mass of Al = 1.703 g  Volume of H2SO3 (g) = V = 1.95 mL  Temperature = T = 30.0 0C  Pressure…

Q: alculate the mass of O, that is in the collection tube. Round your answer to 2 signi ne reaction…

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Q: The quantity of 10% w/w/ sodium chloride solution that can be made from 0.5 av. lb of 18% w/w sodium…

A: We have 18% w/w/ sodium chloride solution.

Q: Can one predict how many experiments are requiredto verify a natural law? Explain

A: Natural Law: The fact or theories obeyed in accordance with nature to defined the firm guideline or…

Q: 3) Why is it important to quote temperature?

A: It is very important to quote temperature due to the following reasons:

Q: How many particles are present in a closed container if the energy it contains is 93357.1J, and the…

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Q: Water vapor makes the largest contribution to the greenhouse effect. True or false? Explain how?

A: Earth has an atmosphere made up of gaseous layers. It traps the sunlight and warms the planet. This…

Q: 2.Oxygen travels at a velocity of 29.0 m/s. At what velocity would SF4 travel under the same…

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Q: Explain the term 'partial pressure' and why Dalton's lawis a limiting law.

A: To find: Explain the term 'partial pressure' and why Dalton's law is a limiting law.

Q: Define the term Increasing Density and Stability?

A: Increasing Density: Numerically, density is defined as the the ratio of mass of a substance to its…

Q: if P = 782mm Hg, V = ? (L), n = 0.210 mol, T = 27.0 degrees celsius (ideal gas)

A: For Ideal gas      Patm  VL=nmoles×R atm Lmol.K×TK      P= pressure atm     V=volume L      n=moles…

Q: . In a mixture of the gases oxygen and helium, which statement is valid?(a) The helium atoms will be…

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Q: Pls help ASAP

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Q: About how long would it take hydrogen cyanide gas (HCN) to travel 10.0 meters at 25.0°C, when its…

A: The 1 J is equal to 1kg.m2s-2 and 1kJ is equal to 1000 J. Thus, 3.72 kJ is equal to 3.72×103…

Q: 6. The pharmacy believes that the reaction, when it occurs in the stomach, may have an unintended…

A: In continuation of the earlier problem 5, the no. of moles of CO2 = 0.167mole

Q: Distinguish between the terms elution and eluent.

A: ELUTION: In analytical and organic chemistry, elution is the process of extracting one material from…

Q: Which of the graphs below best represent the relationship between X and Y?

A: As the mentioned reaction is a nuclear reaction,and here lead is being produced from the decay of…

Q: Which of the following will have the lowest average kinetic energy? A) He at 400 °C B) Ne at 500 °C…

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Q: Why is it usually more convenient to measure ΔH than ΔE?

A: Given statement,           It is usually more convenient to measure ΔH than ΔE.

Q: Select the best answer or answers from the choices given: In a temperate climate under ordinary…

A: The loss of heat occurs from a body due to the temperature difference between the body and its…

Q: 1. Allicin is the compound responsible for the characteristic smell of garlic. An analysis of…

A: Empirical formula is equal to the simplest ratio of elements present in molecular formula. Example:…

Q: 8. What happens to the average kinetic energy (speed) of the particles in a sample of matter as the…

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Q: What are the differences between cryo-SPA Vs cryo-ET techniques and their advantages and…

A: Cryo techniques are a group of related procedures for stabilizing specimen or fixing for microscopic…

Q: During World War II, physicists developed methods to separate the uranium-235 and -238 isotopes. One…

A: Isotopes: The atoms of the same element, when have a different number of neutrons, are called…

Q: A reaction at 25.0 °C evolves 166. mmol of carbon monoxide gas. Calculate the volume of carbon…

A: Applying ideal gas equation. PV = nRT

Q: 1. Due to diffusion a) Spread of radioactive particles around the world b) Spread of mercury waste…

A: 1. Few information about diffusion: If molecules present in one region and are rich in concentration…

Q: III Climate change Sea level rise A large part of sea level rise would be derived from temperature…

A: we know that, density = mass/volume  And the density of the water is inversely proportional to the…

Q: Calculate the kinetic energy (in Joules) of 2.000 mole of hydrogen gas at 450.0K.

A: According to the Kinetic molecular theory, the average kinetic energy of gas molecules is given by,…

Q: Explain why some molecules contribute to the Greenhouse effect while others do not:

A: When sun's radiation falls on earth, a major part gets reflected back while some is absorbed. The…

Q: what is the unit of the answer?

A: Given :- mass of Fe2O3 = 3.80 g  To find :- unit of Fe produced during the reaction

Q: Calculate the mass of Kr in a 1.49 L cylinder at 71.3 C and 1.61 bar. mass:

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Q: Show the relationship between two variables, Ea and ΔHo ?

A: Ea is the activation energy. ΔHo is the standard enthalpy. Activation energy is the energy required…

Q: Thermochemistry 1 Name Tbp AH fus ΔΗ C solid C liquid C gas vap (°C) (°C) (J/g) (kJ/mol) (J/ go°C)…

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Q: 1. 6CO, + 6H,0 → C,H,„O; + 60, a) co, to 0, b) H,0 to C,H,,O, c) co, to C,H.„O,

A: Ans The given balanced chemical equation  6CO2 + 6H2O --------------> C6H12O6  + 6O2 Now mole to…

Q: Mass KCIO,= 0.25g Mass empty test tube= 17.00g Mass test tube +kcl = 17.15g P = 740mmHg P =17.5mmHg…

A: Given that: Mass KClO3 = 0.25g Mass empty test tube= 17.00g Mass test tube +KCl = 17.15g Patm = 740…

Q: Ammonia burns in air as follows: NH3(g) + O2(g) → N2(g) + H2O(g) (unbalanced) If x liters of N2(g)…

A: A mole is defined as the amount of substance containing the same number of discrete entities (atoms,…

Q: The distance from the Earth to the moon is 385000 km. The Apollo 10 mission holds the record for the…

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Q: Given f(x) = x- 7, what will f(12) be equal to? O 12 19 O 5

A: Variable: The term whose value is not fixed. e.g. x is the variable is the given equation. Constant:…

Q: Oxygen travels at a velocity of 29.0 m/s. At what velocity would SF4 travel under the same…

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Q: let 5°C 41°F 303 K 86°F -35°C 238 K C-D Do you know the answer?

A: Celsius, Fahrenheit and Kelvin all are the units for measuring temperature. Formula used: 1) T (°F)…

Q: State Charles' Law in words and also in the form of equation. Indicate the conditions under which…

A: The law was named after a scientist Jacques Charles who formulated this law  in 1780s. Charles's law…

Q: 2. Suppose 71.0 mL of dioxygen gas are produced by this reaction, at a temperature of 50.0 °C and…

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Q: Calculate the mass of the air contained in a room that measures 3.50 dm × 2.50 dm × 2.00 dm (density…

A: Calculation of volume of room: Volume=l×b×h=3.50 dm×2.50 dm×2.00 dm=17.5 dm3 Conversion of dm3 into…

Q: Explain the important consequences of global warming.

A: Global warming: Global warming can be defined as an unusual rise in the average temperature of the…

Q: A) For one cubic centimeter of copper, calculate the Debye temperature 0. The speed of sound in…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: In fluorescence, the quantum yield is best defined as the:   A. number of photons emitted, divided…

A: In  fluorescence, the quantum yield is number of photons emitted divided by the number of photons…