The number of protons in an atom's nucleus defines the element.  True  False

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 1.79 kg sample ...

A: Answer is given below

Q: This is the chemical formula for methyl tert-butyl ether (the clean-fuel gasoline additive MTBE): CH...

A:

Q: A buffer solution is prepared by adding 12.71 g of sodium acetate (NaC2H3O2) and 15.98 g of acetic a...

A:

Q: ATION

A: Now, Below are the methods mentioned evaluating the steps,

Q: Manganese commonly occurs in nature as a mineral. The extraction of manganese from the carbonite min...

A:

Q: Shown below is the major resonance structure for a molecule. Draw the second best resonance structur...

A:

Q: Gaseous ethane (CH,CH,) reacts with gaseous oxygen gas (0,) to produce gaseous carbon dioxide (CO,) ...

A: number of moles = mass/molar mass  mass = moles × molar mass  percent yield = {actual yield/theoreti...

Q: Calculation of pH (SHOW CALCULATION FROM THE GRAPH IATTACH GRAPHI 2.Find out pH at equivalent to V1/...

A: Plot of pH vs Volume of NaOH added

Q: This is a Brønsted-Lowry acid-base reaction. Draw structures for all the products, showing any non-z...

A: A bronsted-lowry acid can be defined as the substance that can donate a proton whereas a bronsted-lo...

Q: H* + H20 HO OH +

A:

Q: Water is a covalently bonded molecule because it is made of only nonmetal elements.  True  False

A: Covalent bonds are formed between two nonmetals

Q: Joey adjusts the pressure exerted on a balloon from 30.6 psi to 76.6 psi. As he does so, the volume ...

A:

Q: Mechanism 1. Propose a mechanism that accounts for the transformation below. TSOH, EIOH EtO mechanis...

A: This reaction proceeds through SN2 mechanism.

Q: meo Eto On

A: The molecular details along with IUPAC name has been provided.

Q: Measurements show that the enthalpy of a mixture of gaseous reactants increases by 253. kJ during a ...

A: The sign convention for heat flow are as follows : When the heat flows into the system, a positive s...

Q: Question 5 What is the pH of 0.01 M acetic acid solution (Ka = 1.8x10-5) O 3.22 O 3.55 O 3.37 O 4.24

A: Concentration of acetic acid = 0.01 M Ka = 1.8 × 10-5

Q: 4. The detonation of nitroglycerin proceeds as follows: 4 C3H5N3O9(l) → 12 CO2(g) + 6 N2(g) + O2(g) ...

A: Given, The detonation of nitroglycerin: 4C3H5N3O9(l) → 12CO2(g) + 6N2(g) + O2(g) + 10H2O(g) Note: mo...

Q: Based on the cell potential measured for the cells Co(s) | Co²*(aq) || Cu²*(aq) | Cu(s) Fe(s) | Fe²*...

A:

Q: Using the Debye-Huckel Limiting law, calculate the activity coefficient of sulfate ion with u = 0.22...

A: Given:-

Q: O STATES OF MATTER Understanding how average molecular speed scales with. Rank the samples of gas de...

A:

Q: Write the formula of the conjugate base of the Brønsted-Lowry acid, HBrO₂

A: Formula of the conjugate base of the Brønsted-Lowry acid, HBrO₂ ?

Q: The wave number of the radiation that causes a transition in the energy states corresponding to two ...

A:

Q: "Synthesis gas" is a mixture of carbon monoxide and water vapor. At high temperature synthesis gas w...

A:

Q: What is the pH at which a buffer composed of CO32- and HCO; would be most effective at resisting pH ...

A: We would use Henderson-Hassalbalch equation to determine the value of pH .

Q: Is the following solution a buffer? Each solution was prepared by mixing and diluting appropriate qu...

A: An acid is a substance that give hydrogen ions in solution and a base is a substance that give hydro...

Q: meo Eto

A:

Q: which molecule in the reaction below undergoes oxidation?  4Fe + 3 O2 > 2Fe2O3

A: Which molecule in the reaction below undergoes oxidation? 

Q: The term which describes the pressure exerted by a vertical column of water, based on the distance b...

A: 2nd option is correct that is hydrostatic head

Q: A chemist determines by measurements that 0.080 moles of iodine solid participate in a chemical reac...

A: Number of moles is calculated by dividing given mass with molecular mass.

Q: Which reaction below will produce significant amounts of product? The acids in decreasing strength a...

A: Given that, the acids in decreasing strength are H2SO4>HNO3>H3PO4>HCN. We have to tell whic...

Q: Is it posible to remove 99% of 1.0 μM CuY2- impurity (by reduction to solid Cu) from a 10.0 mM CoY2-...

A: We mainly have cobalt-EDTA solution (CoY2-) in which there is a little bit of copper impurity which ...

Q: Find the energy per molecule of CO2 released in eV and compare this to the energy per CO2 molecule r...

A:

Q: If you have 155 mL solution of a 0.762 M FeCl3 solution, how many moles of FeCl3 are contained in th...

A: 0.762 M means 0.762 moles/liter and since there are 0.155 liters (155ml/1000 ml/l = 0.155 L) then th...

Q: A certain number of moles of gas is contained in a 29.2 liter flask at 15.6°C. When the temperature ...

A: According to Charles law, when number of moles (composition) and pressure is kept constant then volu...

Q: Consider the reaction scheme below. PhLi HONH,, HCI A ELOH B D (i) Deduce the structures of compound...

A: Organic reaction mechanism

Q: Draw the major product of this reaction. Ignore inorganic byproducts. CI 1. (CH3)2CULI (excess) 2. H...

A:

Q: How many grams of calcium nitrate are present in 55.2 moles of Ca(NO3)2?

A:

Q: Aqueous hydrochloric acid (HCI) reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium ...

A:

Q: Determine the new pressure when a constant volume of gas at 4.0 atm is heated from 22.8 °C to 96.6 °...

A: Gay-Lussac’s Law: According to Gay-Lussac’s law, if we increase the temperature of a definite amount...

Q: As the charge of the metal ion increases, what happens to the value of the activity coefficient? a...

A: From the extended Debye-Huckel equation, activity coefficient is related with the charge of ion as -...

Q: b) Pyrrole and indole both react with the reagents shown below to give compounds E and F respectivel...

A:

Q: After determining the absorbance of several standards of known concentration, the trendline for a ca...

A: The equation for a straight line is given by  y=mx+c where m is the slope and c is the y-intercept. ...

Q: In the recovery of iron from iron ore, the reduction of the ore is actually accomplished by reaction...

A:

Q: if the atoms in water do not change, how is water able to exist as gas, liquid or solid?

A: The water molecules consists of one oxygen atom at the middle and two hydrogen atoms at extreme posi...

Q: A positively charged particle in the nucleus of an atom is    A. an electron    B. a neutron   ...

A: A positively charged particle in the nucleus of an atom is given below

Q: A penny has a mass of 2.50 g and the Moon has a mass of 7.35 × 10“ kg. Use this information to answe...

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to ...

Q: Given that the Ka of a monoprotic acid HA is 3.20 x 10, and the acid HA concentration is 0.751 M, fi...

A:

Q: Suppose there is an element X which occurs naturally as X2(g). X2(g) + 2O2(g) → X2O4(g) X2O4 has a...

A:

Q: b) Pyrrole and indole both react with the reagents shown below to give compounds E and F respectivel...

A:

Q: controlled

A: A- Hyperplasia - It is the Increased cell production in a normal tissue or organ but it is not like ...

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.