20. An object with a mass of 6.3 kg has a force of 7.1 newtons applied to it. What is the resulting acceleration of the object? 21. An object with a mass of 6.5 kg accelerates 12.3 m/s? when an unknown force is applied to it. What is the amount of the force?

Q: When 762 joules of heat is added to a sample of solid copper (Cu), the temperature rises from 18.2…

A: We will use formula of heat

Q: How much heat is needed to heat 26.9 grams of metal from 19 degrees C to 101 degrees C? The specific…

A:

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 194.0 g sample…

A: Mass of sample = 194 gram Initial temperature = - 8.3℃ Final Temperature , T2 = 4.5 ℃ Change in…

Q: Use the References to access important values if needed for this question. In the laboratory a…

A: Given Mass = 13.9 g Temperature difference = 40-24.3 = 15.7°C Heat (Q)  = 28.2 J

Q: A 522.5 g sample of aluminum is initially at 23.2 C. It absorbs 23.73 kJ of heat from its…

A:

Q: In a 1m3 sample of air, 3g of water that was heated so that all 3g evaporated. How many calories of…

A: 1m3 sample of air, 3g of water

Q: Calculate the kinetic energy of a 235. mg raindrop moving at a speed of 6.9 Round your answer to 2…

A: mass of raindrop = 235 mg =235×10-3 gspeed = 6.9 ms

Q: room temperature to boiling is approximately 100 kJ. Express this quantity of neat kilocalories.…

A:

Q: 1. Classify the following as physical or chemical changes and exothermic or endothermic processes.…

A: If a process is reversible that by applying opposite force or any other way we get the same product,…

Q: A 25.0 g sample of silver metal was heated to 170 degrees C and then placed in a calorimeter holding…

A: Calorimetry is used to measure the transfer of heat taking place in a system. In this process, the…

Q: Lead has a heat of fusion of 23.140 J/g, along with a specific heat of o.12928 J/(g °C) in its solid…

A:

Q: What is the specific heat capacity of the metal?

A:

Q: a ball has a kinetic energy of 106 J. If the ball is moving at a velocity of 2.51 m/s, what is the…

A: Since , Kinetic energy =1/2 mv 2 Where m = mass (in kg ) V= speed (in ms -1)

Q: You weigh a dry flask, and place a chunk of solid into it, then weigh it again. You then fill the…

A: We are given mass of flask = 58.97g  Mass of flask + solid = 135.91g  We have to find mass of solid

Q: You burn a 0.6 g jellybean to warm 13 g of water, which increases the temperature of the water 2 °C.…

A:

Q: An empty beaker is placed on a balance, and its mass is recorded at 42.513 g. The beaker is removed…

A: In this question, we want to determine the mass of the sodium chloride solution ( NaCl )  You can…

Q: A sheet of gold weighing 9.5 g and at a temperature of 16.5 °C is placed flat on a sheet of iron…

A: Approach to solving the question:Please see attached photos for detailed solutions. Thank you.…

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 1.03kg sample…

A: We have to calculate the specific heat capacity of the substance

Q: 1. A student claimed that the flat C lines on the graph occur when the energy is being used to…

A: A phase diagram is a type of map used in physical chemistry, engineering, mineralogy, and materials…

Q: Determine the kinetic energy of a baseball thrown at 100.0 mph. The mass of a baseball is 144.3 g.

A: Given data, Mass of the baseball = 144.3 g  Velocity of the baseball = 100.0 mph Since , 1mph =…

Q: A home swimming pool contains 15 m3 of water. At the beginning of the swimming season, the water…

A: Volume of water = 15 m3Density of water = 1000 kg/m3Mass of water = volume x density = (15 m3) x…

Q: What is the specific heat of an object that goes from 20.7°C to 34.3°C when it absorbs 137 calories…

A: 1) Mass of the object is (m)=11.2 g 2) The initial temperature of an object is (Ti)=20.7°C 3) The…

Q: Find the kinetic energy of the ball.

A: Given :- mass of ball (m) = 23.44 kg                speed of ball (v) = 2.55 m/s  To calculate :-…

Q: A 1,906,906 g car is traveling 0.717 m/s. Calculate the kinetic energy of the car in J. Do not…

A: Mass of car (m) = 1906906 g = 1906.906 kg Velocity (v) = 0.717 m/s

Q: What is the specific heat of an object that goes from 23.6°C to 33.7°C when it absorbs 126 calories…

A: The amount of heat per unit mass required to rise the temperature of a body to one degree Celsius .

Q: J cal kJ 688 199 0.585

A: 1 cal = 4.184 J  1kJ = 1000 J

Q: The specific heat of a substance is the amount of heat needed to O change 1 g of the substance from…

A: The answer to the following question is given as -

Q: A 135 g sample of gold originally at 40.8 °C was heated with 161 calories. The specific heat of gold…

A:

Q: A 489.9 gram sample of aluminum is initially at 25.7 C. It absorbs 38.27 kJ of heat from its…

A:

Q: Calculate the amount of heat needed to boil 44.5 g of hexane (C,H,4), beginning from a temperature…

A:

Q: What is the specific heat of an object that goes from 22.3°C to 31.5°C when it absorbs 139 calories…

A: 1) The mass of the object is 2) The initial temperature of an object is 3) The final temperature of…

Q: In the laboratory a student uses a "coffee cup" calorimeter to determine the specific heat of a…

A: …

Q: A sheet of gold weighing 9.4 g and at a temperature of 19.1 °C is placed flat on a sheet of iron…

A: Given Mass of gold = 9.4 g Temperature of gold = 19.1•C Mass of iron = 18.4 g Temperature of iron =…

Q: Energy can be divided into two types. What are these types and give an example of each.

A: Energy is the ability to do work: the ability to cause change: all energy can be transferred.

Q: The figure above shows a liquid of diatomic bromine in equilibrium with its vapor. Compare the…

A: A question based on chemical bonding, which is to be accomplished.

Q: 67.3 g sample metal with specific heat of 0.246 J/g degrees celsius is heated by 1693 J of energy.…

A: Given data: Mass of metal (m) = 6.3 g, Specific heat of metal (c) = 0.246 J/g o C, Energy (E) = 1693…

Q: he density of liquid oxygen at its boiling point is 1.14 kg/L , and its heat of vaporization is 213…

A: Heat of vaporization for 1 kg of liquid oxygen = 213 kJ

Q: A 43.97 kg cheetah is running after a gazelle at 22.49 m/s. What is the kinetic energy of this…

A: Given mass of cheetah  = 43.97 kg  velocity               = 22.49 m/sec Kinetic Energy    = ?

Q: D 1. A student claimed that the kinetic energy of E to F is lower than the kinetic energy of A to B.…

A: The following graph is know as the heating curve in which with temperature various phase changes are…

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.