keyboard

Q: This image represents a particulate view of a sample of matter. Classify the sample according to its...

A: In chemistry, the matter can be classified as pure substance or a mixture depending upon its composi...

Q: Name the elements contained in the following compounds.a. sodium chloride (NaCl)    c. ethanol (C 2H...

A: The name of the elements in the given compounds has to be given,

Q: What is the difference between a crystalline solid and an amorphous solid?

A: Classification of solids in two category on the basis of the arrangement of constituent [articles as...

Q: 26. Supply two possible starting materials for the following reaction.

A:

Q: Give answer first two questions with explanation please

A: Acid-Base reaction: It is a very fast reaction when an equivalent amount of acid will react with an ...

Q: show-all-working-explaining-detailly-each-step. Answer should be typewritten using a computer keyboa...

A: Fe+3 will get reduced because Fe+3 has high reduction potential while Cu will oxidised because becau...

Q: show-all-working-explaining-detailly-each-step. Answer should be typewritten using a computer keyboa...

A: CH4  do not hydrolysed because of absence of vacant orbital. SiH4 undergo hydrolysis because of pres...

Q: What is the partial pressure (in atm) of CO₂ at 468.2 K in a 25.0 L fuel combustion vessel if it con...

A: formula used :- PV = nRT

Q: Identify the area of emphasis for various branches of chemistry.

A: Modern chemistry has five main branches: 1. Physical chemistry 2. Organic Chemistry 3. Inorganic Che...

Q: Distinguish between physical and chemical properties.

A: Physical and chemical properties has to be distinguished.

Q: Explain how dimensional analysis is used to solve problems.

A: Dimensional Analysis is a way chemists and other scientists convert units of measurement.

Q: Calculate the pH for a buffer that is 0.050 M benzoic acid and 0.150 M sodium benzoate. The Ka for b...

A: The pH of buffer solution can be calculated by using Henderson Hesselbach equation - pH = pKa + log ...

Q: Q1// A buffer solution prepared by adding adequate amount of Acetic acid and Sodium acetate to prepa...

A: For Acetic acid, pKa = - log Ka = - log (1.8x10-5) = 5 - 0.255 = 4.745  (1) pH on addition of 10 mL ...

Q: Research the most recent measures taken by countries around the world to reduce CFCs in the atmosphe...

A:

Q: Explain the difference between a pure substance and a mixture.

A: The difference between a pure substance and a mixture has to be explained.

Q: Label each of the following pieces of data as qualitative or quantitative.a. A beaker weighs 6.6 g.b...

A: Quantitative data can be described as a measurable quantity which is represented by a number. Some e...

Q: Number 2

A: Answer will be (A) A2 is an intermediate, in a reaction mechanism intermediates first appear as a pr...

Q: Identify the common steps of scientific methods.

A: A scientific method is a systematic way to find answers to question or problems.

Q: Explain why scientists do not use a standard set of steps for everyinvestigation they conduct.

A: To find: The explanation about why scientists do not use a standard set of steps for every investiga...

Q: 18. Rank the following from slowest to fastest rate of nitration. HO HO 2 a. 1<3<2<4 b. 3<1<2<4 d. 2...

A:

Q: Describe a method that could be used to separate each mixture.a. iron filings and sand c. the compon...

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you. ...

Q: What is a derived unit? List an example.

A: There are seven basic SI units given by the international system of units. All the other units come ...

Q: Give last three questions with explanation please

A: The reactions given by the H2SO4 and DCM are the acid-base reactions. Acids tends to release their H...

Q: show-all-working-explaining-detailly-each-step. Answer should be typewritten using a computer keyboa...

A: Option B is correct Option.   

Q: A student was given from the list of the compounds below A, B and D blindly and asked to identify th...

A: In this question D- are occurred in the haloform test as it is a methyl ketone (-COCH3 group).  

Q: Complete the table. Substance Pure or mixture Туре aluminum pure element apple juice hydrogen peroxi...

A: Pure substance is formed only one type of particle; they are classified as elements and compounds. A...

Q: How many grams of NaOH  are there in 183 grams of an aqueous solution that is 2.65% (w/w) NaOH ?  __...

A: Weight concentration of a solution is expressed as % w/w. Like before, this stands for weight per we...

Q: Define and compare accuracy and precision.

A: The degree to which the given value is correct and is free from error is termed as accuracy.  

Q: Downloads N Re chrome://downloads A gas has a volume of 3.49 L at 0°C. What final temperature, in de...

A: The relation between temperature and volume is given by Charles's law.  At constant pressure the vol...

Q: Classify each as either a solid, a liquid, or a gas at room temperature.a. milk           d. heliumb...

A: Room temperature is around  20 to 22°C. Furthermore, solid-state comprised of particles arranged in ...

Q: Name the compound in iupac system

A: Rules for naming organic compound is as follows; Select the longest continuous carbon chain. In the...

Q: How many moles of NACl2 are needed if we want to make 38.74 g of PBCl2 bythe reaction 2Nacl+ Pb(No...

A:

Q: Classify each as a physical property or a chemical property.a. Aluminum has a silvery color.b. Gold ...

A: Physical properties are those that can be observed or measured without changing its composition. Che...

Q: show-all-working-explaining-detailly-each-step. Answer should be typewritten using a computer keyboa...

A:     In this question, we have to find out the correct answer of given problem by the help of the phy...

Q: The nonvolatile, nonelectrolyte glucose, C6H12O6 (180.2 g/mol), is soluble in water, H2O . Calculate...

A:

Q: The accepted length of a steel pipe is 5.5 m. Calculate the percent error for each of these measurem...

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3 sub-parts. Please resubmit the ques...

Q: Explain the difference between an element and a compound.

A: Given: Explain the difference between an element and a compound.  

Q: A chemistry student is investigating how particle sizeaffects the rate of dissolving. In her experim...

A: Like dissolves like .Sugar made of sucrose is a polar molecule  and so is water. Sugar dissolves in ...

Q: show-all-working-explaining-detailly-each-step. Answer should be typewritten using a computer keyboa...

A: Strong acids and bases are the ones which undergo complete dissociation.Weak acids and bases are the...

Q: Name the compound in iupac system

A: The compound contains a double bond outside the ring, a bromide substituent, a chloro substituent an...

Q: Describe the scientific approach to knowledge. How does it differ from other approaches?

A: Scientific approaches are rational and it can only be successfully applied by rational thinking. Sci...

Q: Which law states that a compound always contains the same elements in the same proportion by mass?

A: This law was stated by Joseph Proust who was a well-known French chemist.He gave this law as a concl...

Q: show-all-working-explaining-detailly-each-step. Answer should be typewritten using a computer keyboa...

A:

Q: You have a 23-g sample of ethanol with a density of  0.7893 g/mL. What volume of ethanol do you have...

A: Density of ethanol is equal to the mass of ethanol divided by its volume. Write the expression of de...

Q: A gas is placed in a storage tank at a pressure of 29.4 atm  at 93.8 oC . As a safety device, a smal...

A:

Q: Write the following numbers in scientific notation.a. 0.0045834 mm         c. 438,904 sb. 0.03054 g ...

A: hen the number is too small o too large for any calculation. Then the number is converted to scienti...

Q: Express the quantity 33.2 x 10-min mm. a) 33.2 mm c) 0.332 mm b) 3.32 mm d) 3.32 x 10- mm

A: The meter and millimeter both are units of length. The millimeter is equal to one-thousandth of a me...

Q: After burning for three hours, a candle has lost half of its mass. Explain why this example does not...

A: Law of conservation of mass states that Mass can not be created or can not be destroyed during any c...

Q: A. You are a manager of a laboratory that produces S03 (e). Your newly renovated production room has...

A: The question is based on the concept of le- chatelier principle. it states that when a system at equ...

Q: Describe the difference between a physical change and a chemical change.

A: A physical change is a change in which some properties of the substance change, but its identity rem...