Calculate the heat released (in J) when a small amount of NaOH(s) is added to 500 ml of water in a coffee cup calorimeter. Water was initially at 25 °C and increased to 28 °C. Ccal = 0.8 J/OC. Note: Include proper sign for heat released.

Q: 6.022 x 1023 ato: equation B: 20.18 After rounding, the answer to equation

A: Rounding off and significant figures:   Rounding is reducing the large number to the simplest form…

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Q: Convert 0.5 °C to Kelvin (K).

A: Celsius and kelvin are units of temperature. Celsius, also known as centrigrade , invented in 1742…

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A:

Q: Thank you, but why was 0.0135 multiplied by 2?

A: Answer: For most of the reaction on increasing the temperature rate of reaction increases because…

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A:

Q: Next, the chemist measures the volume of the unknown liquid as 1.337 L and the mass of the unknown…

A: The objective of this question is to calculate the density of an unknown liquid given its mass and…

Q: Calculate the pressure to which this volume of air must be compressed in order to fit into the air…

A: Calculate the pressure.

Q: Show how to determine (and then calculate) the volume (in mL) of an iron bar that is 2.150 inches…

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Q: 1.17x10^24atoms of CO2 to mol= rounf answer to 2 decimal places

A: The mole of CO2 present in 1.17×10^24 atoms.

Q: A physical chemist measures the temperature T inside a vacuum chamber. Here is the result. T=-42.6…

A: T(K) = 230.4 K

Q: 274.51g of Ca(CN)2 have what volume as a gas @STP? round answer to 2 decimal places.

A: Volume of 1 mole of any gas at STP = 22.4 L  Mass of 1 mole of a gas = Molar mass of the gas

Q: А) 280 K B) The freezing point of water c) 5°C D The freezing point of water and 280 K (E) 30 °F

A:

Q: Converting between Fahrenheit and Kelvin Temperature Scales Convert 310 K to Fahrenheit.

A: Given: T = 310 K

Q: Determine the mass (in g) of a substance, with a density of 1.86(g)/(m)L, that occupies 350.0mL.

A: Density of a substance = 1.86 g/mLVolume of a substance = 350.0 mLmass of substance = ?

Q: The Ungoogable scale is related to kelvin by the following equation: T_{K} = J_{U} + 173 Tu 385.00…

A: The Ungoogable scale is related to kelvin by the following equation : TK=TU+173 Given that : TU =…

Q: A helium-filled balloon has a volume of 2.97 L at 19◦C. The volume of the balloon decreases to 2.3 L…

A:

Q: The radius of an argon atom is 94 pm. Assuming theatom is spherical, what is the volume of an argon…

A: Given: Radius of Argon, r=94pm                             =94 x 10-12m…

Q: 5. What is the value of x? Methane (CH4) at 57°C and 702 mmHg has a density x g/L.

A:

Q: Which of the following is equivalent to the volume of a cube of ice measuring 10 cm on each side?…

A: Edge length=10 cm∵ Volume of cube=Edge length3                             = 10 cm3…

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Q: if a 2.50 g block of metal with a density of 6.72 g per cm^3 is dropped into a graduated cylinder…

A: Density = MassVolume So, volume = massdensity

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Q: Evaluate the following expression: 1.723 × 10² + 7.38 × 10³

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Q: Volume would o.0595 n temperature (25°C)

A: Consider pressure is 1atm Use ideal gas equation to get all answers  1) 1.47L 2) 1.37L 3) 1.24L

Q: What mass of Cl2 is represented by 17.1L at 4.16atm 78.0°C

A:

Q: What is the density of ethylene carbonate at 150 C ?

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A:

Q: Evaluate the fraction. (6.38 × 104) (5.15 × 10°) 2.51 x 108 1.31 ×10² Incorrect

A: The given structure is -->  = (6.38 x 104) x(5.15 x 106)/(2.51 x 108) = 1.31 x 103

Q: Using Graham’s Law, if the speed of oxygen gas at room temperature is 1066 mi/hr, what is the speed…

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Q: Convert 71.20 dyn/cm to g/s^2.

A: It is CGS unit conversion

Q: The answer must be 8.98*10^-14 ng H

A: We have to calculate the mass of H in 36.9 pg of strontium phosphide pentahydrate.

Q: A sample of O2 gas at a given temperature and pressure has a density of 1.30 g/L. What is the…

A: Density of O2 = 1.30 g/L Molar Mass of O2 =32 g/mol Density of C3H8 = unknown Molar mass of C3H8 =…

Q: The average life expectancy in the United States is 78.7 years. Assuming there are 365.25 days in a…

A: Given that , average life expectancy of US is 78.7 years  And given  1 year = 365.25 days  Complete…

Q: Use PV = nRT to derive a formula for the density of gas in g/L

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Q: CEN OH CEN -OH HO LOH `NH2 HO,

A: Introduction: Infrared spectroscopy is used to detect the functional group in a molecule and nuclear…

Q: The density of a gas is 1.76 g/L at a particular pressure and 10.0°C. What is its density in g/L at…

A:

Q: classroom value of 28Sm3 what isits volume in each unit) a) km3 Km³ dm3 Ocm³

A: The class room value given is 285 m3

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A: The width of the sphere, w = 69.0 cm Volume of air, V1 = 3900 L at a pressure (P1) of 1 atm

Q: Perform the following operation and express in scientific notation: a) 3.15 x 102 b) 5.33 x 10 c)…

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Q: A liter of alcohol at zero degree Celsius is heated to 40 degree Celsius. What will be its new…

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Q: Using Graham’s Law, if the speed of oxygen gas at room temperature is 1066 mi/hr, what is the speed…

A: Applying grahms diffusion law r1/r2= √M2/√M1

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A: From the Ideal gas law, PV = n R T Given temperature…

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.