How does microwave cooking differ from conventional cooking?

Q: How does the specific heat of water compare with that of various metals? Why?

A: Specific heat can be defined as the amount of heat that is added or release from any substance to…

Q: atoms ever in contact

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Q: A certain reaction has an activation energy of 51.73 kJ/mol. At what Kelvin temperature will the…

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Q: two blocks of ice when placed together, combine to form a single piece. explain how this happens?

A: The melting point of ice:

Q: Why is half frozen fruit punch always sweeter than completely melted fruit punch?

A: The sweetness depends on the concentration of the sugar.One of the main constituents of fruit is…

Q: Why zener breakdown voltage decreases with increase in temperature?

A: One of the most important characteristics of zener diode is zener break down. When a reverse voltage…

Q: If no molecule in a body can escape, would body have any odor?

A: The odour is due to molecular diffusion, hence if the molecule could escape, the body will have…

Q: Do you find the idea that you are made of recycled atoms disturbing? Why or why not?

A: We are made of atoms that were formed on other starts and distributed across the universe.

Q: What is the definition ofradioactive emission?

A: In this question, we need to understand what radioactive emission is

Q: What is compound

A: A chemical compound is a chemical substance composed of many identical molecules composed of atoms…

Q: The selective absorption of electromagnetic radiationby materials (can, cannot) be used as an aid…

A: Given:The selective absorption of electromagnetic radiation by materials (can, cannot) be used as…

Q: OI only OIl only IIl only OI and II only 1, Il and III

A: in all three of them i.e (i),(ii) and (iii) ameter is connected correctly

Q: A pure substance made up of the same kind of atoms is called

A: A pure substance made up of the same kind of atoms is called ? we have to answer the above statement

Q: According to Hess, the change in enthalpy for any chemical reaction is the same whether the reaction…

A: Hess’ law also known as Hess’s law of constant heat summation states, “at constant temperature, heat…

Q: A substance that heats up relatively quickly has a O low specific heat. many strong molecular…

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Q: In terms of conservation of total enrgy, what happens to the lost kinetic energy?

A: The total mechanical energy of an isolated system is always conserved. The total mechanical energy…

Q: Calculate the rate constant, k, for a reaction at 50.0 °C that has an activation energy of 87.9…

A: Given data: The activation energy is E=87.9 kJ/mol. The temperature is T=50°C. The frequency factor…

Q: Concerning the laser effect in tissue, vaporization occurs when the cell temperature reaches to * O…

A: The tissue heat up rapidly because of high absorption and high power of the laser.

Q: Discuss Exothermic and endothermic reactions

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Q: A certain reaction has an activation energy of 56.37 kJ/mol. At what Kelvin temperature will the…

A: Given, Rate constant is K. K2=8K1 Activation energy, Ea=56.37 KJ/mol=56.37×103 J/mol Arrhenius…

Q: Why do metals feel cold even when they are at room temperature?

A: Metals feel cold

Q: hat is the mass of 2.0 mol of H20 gas (water vapour). The atomic ma pxygen is 16.0 g/mol and the…

A: Given: The atomic mass of oxygen is 16g/mol and the atomic mass of hydrogen is 1.00 g/mol. To find:…

Q: The KP of a reaction depends on temperature only. It is independent of the pressure of the…

A: The equilibrium constant KP of a reaction depends only on the temperature of the reacting system. It…

Q: Wet air is less dense than dry air, but wet hydrogen is more dense than dry hydrogen. explain why…

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Q: At what air temperature will exhaled breath condense by self-nucleation? Assume that a saturation…

A: Write the expression of saturation ratio. w=0.622pvpt-pv0.2326=0.622pv1 atm-pvpv=0.272 atm

Q: How many grams is 3.2 mol of N2? Round your answer to the nearest whole number.

A: Molar mass of N2  = 2 * Atomic mass of N = 2 * 14 g/mol  = 28 g/mol

Q: Some solar energy devices used in homes circulate air over a bed of rocks that absorb thermal energy…

A: Use principle of calorimetry and put the values to calculate energy stored.    Given:mass of…

Q: This process produces NADPH. * Light Deaction

A: NADPH plays a crucial role in some of the chemical reactions that make up for the process of…

Q: What results from an unequal sharing of electrons between atoms?

A: Electrons are carriers of charges.

Q: What Is Activation Energy? How Is It Calculated?

A: Activation energy, in chemistry, the minimum amount of energy that is required to activate atoms or…

Q: .How much energy is released from glucose when oxidized Your answer What is the far point of a…

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Q: How does our body react to hot or cold substances? Explain

A: We need to explain how our body react to hot or cold substances. Let's understand each one by one…

Q: Discuss which contains more atoms: 1kg of lead or 1kg of aluminium?

A: A mass of 1 atomic mass unit is expressed in units of kilograms as,The mass of one atom of lead is…

Q: The specific latent heat of vaporization of a particular liquid is 2.0 x 10 Jkg, its relative…

A: Given : Specific latent heat of vaporization, LVH  =  2.0x105J/Kg Relative molecular mass  =  30…

Q: write the balanced chemical equation for P+O2=P2O5

A: 2P+52O2 = P2 O5…

Q: The energy equivalent of  0.5g of a substance is

A:

Q: Liquid nitrogen is obtained froM liquefied air and is used to prepare frozen goods and in…

A: Given : density of liquid nitrogen at boiling point (d) = 0.808 gcm3Required : density of liquid…

Q: Which is NOT an element that must be present for a fire to occur? a. heat c. hydrogen b. fuel d.…

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Q: When can you say that a chemical system is a substance or a mixture?

A:

Q: Who advanced the idea of atoms in the early 1800s?

A: In the early 19th century, a chemist named John Dalton first formulated the first atomic theory.

Q: Why we use a number of antimony-bismuth couple in a thermopile?

A: A thermopile is basically made with an antimony-bismuth couple.When a temperature difference is…

Q: How many grams is 1.7 mol of N2? Round your answer to the nearest whole number.

A: We know that one mole of N2 is equal to 2×14g = 28g ; So, 1.7 mole of N2 will have

Q: What is a compound? Cite three examples.

A: A chemical compound is any substance composed of molecules consisting of atoms of two or more…

Q: Discuss why equal masses of golf balls and Ping-Pong balls don’t contain the same number of balls.

A: Ping-Pong balls have a lower mass when compared to the golf ball. The mass of the atoms and…

Q: Who advanced the idea of atoms in the early 1880s?

A: John Dalton is the person behind the advancement of the idea of atoms in the early 1800’s.