What is an element? A. Oxygen and nitrogen joined together. B. A piece of pure nickel C. A water molecule D. Titanium and carbon in an alloy

Q: How do solids, liquids, and gases differ?

A: Everything that contains specific mass and also occupies certain mass gets considered as "matter".…

Q: Define substance and chemistry.

A: Given terms,      Substance and chemistry

Q: 13.Calibration must be properly done to ensure that glass ware and equipment are in good working…

A: The solutions are given below -

Q: States of matter, differ in some of their observable properties. What are they

A: States of matter, differ in some of their observable properties. What are they? That has to be…

Q: 20. A diagram representing water molecules in the solid phase (ice) is shown below. Which of these…

A: * The change of state in matter is conversion of solid to liquid or gas . When the solid substance…

Q: How man

A: mole interms of particles :         1 mole = 6.022 x 1023 particles   mole interms of mass :…

Q: A student mixes some soap with water and then blows through a straw into the solution. Bubbles form.…

A: Whens tudent mixes soap to water and blows , the bubbles are formed, there is chemical phenomenon…

Q: Tetra Pak are commonly consist of layers of materials as shown in the figure. This classification of…

A: What is another name of tetra pack material is given below.

Q: Part 2 CI AICI.

A: Applying electrophilic substitution reaction on benzene.

Q: Question attached

A: Diamond is one of the hardest forms of carbon arranged in a crystalline structure and has high…

Q: A marshmallow is toasted over a fire. It turns golden brown and caramelizes on the outside. It…

A: Physical change - Observed when there is change in the state of a chemical substance but it's…

Q: Does smoke have mass? Does it occupy space? Explain why

A: When a substance having mass and acquires space in its surroundings then it is known as matter. For…

Q: Solid antimony has a density of 6.70 g/cm°. Liquid antimony has a density of 6.53 g/cm°. If a 1.34…

A: The density of the solid antimony is = 6.70 g/cm3 The density of the liquid antimony is = 6.52 g/cm3…

Q: A)I,ii and b)I and ii

A: A question based on introduction to organic chemistry that is to be accomplished.

Q: Solids and liquids could be consists of the same materials and yet have different properties. Just…

A: Solid and Liquid are the two phases of a same substance. A substance exists as a solid in a…

Q: 25. Two types of matter are mixtures and pure substances. The two types of pure substances are

A:

Q: 12. What is an element? A compound?

A: An element and a compound has to be defined.

Q: Is stainless steel a heterogeneous or a homogeneous?

A:

Q: Henrietta has a sample of a pure substance in a beaker. She heats the substance to a temperature of…

A:

Q: Is smoke a matter or not? If yes, then why. If not, why not

A: Anything that occupies space and has mass is called matter.

Q: Which of the following statement is true?    A. laws are shorter theories  B. theories have not…

A: We are to discuss which of given options about scientific theories and laws is correct.

Q: Cite the evidence that indicates that only physical changes occur when a platinum wire is heated in…

A: Physical change means any kind of change of a substance's form like size, colour etc. without being…

Q: An unopened can of soda pop explodes if left in the hot sun. Which two properties change while it is…

A: To determine which two variables change , we would use gas law .

Q: kratvels can you spend during the week

A:

Q: What type of matter is this ?

A: An element is that species that contain atoms of same type. A compound is formed by combination of…

Q: Based on the evidence, what metal are pennies mostly made of, and what metal are dimes mostly made…

A:

Q: Vegetables is an example of  Element? Compound? Homogenerous mixture? Heterogenous mixture?

A: Vegetables are plant or part of plant that are cooked to consume in human body. They contain some…

Q: Ice Sculpture Drop of water Air around clouds State (Solid, Liquid, or Gas) Physical description…

A: Ice sculpture  State:-   Solid Physical description:- cage like structure Drop of water State :-…

Q: William Higginbotham invented the Tenuss T/F

A: William Higinbotham was a scientist famous for the development of the radar devices used in World…

Q: Fossils show that humans have existed

A: By studying the fossil record we can tell how long life has existed on Earth, and how different…

Q: In a solar box cooker sunlight falls on the and the food gets cooked by absorbing heat energy.

A: Mirror is used in a solar cooker to increase the radiation input on the absorbing space and is fixed…

Q: Recall from earlier this semester- what does heterogeneous mean?   a. A mixture of chemicals which…

A: The term hetero means different. Which means the mixture should be in different environment so that…

Q: Caco, solid was grind then heated to decompose to carbon dioxide and calcium oxide. The change/s…

A: Physical Change: It is a process in which a substance undergoes changes in its physical form but not…

Q: How is chemistry in our everyday life’s ?

A: The human beings survived by the chemical process includes, respiration, digestion, reproduction…

Q: he pieces of paper when the pen is moved closer to it?

A: This is a multipart question. According to guidelines in multi parts questions, we can solve only…

Q: (b) Manuel is driving at a constant speed. He then slows down to pass an accident. After passing it,…

A: Option C. Is correct.  As per statement, Manuel is driving at constant speed. He slows speed to pass…

Q: If atoms are mostly empty space and atoms compose allordinary matter, why does solid matter seem to…

A: The reason why solid matter does not have space within it has to be explained.

Q: Newton’s second law of motion states that larger things need more force to move them than lighter…

A: According to Newton’s second law of motion states that larger things need more force to move them…

Q: You observe an unknown substance under a microscope. You notice that the molecules are tightly…

A: Matter has four states namely solid, liquid , gas and plasma. Each states of matter has unique…

Q: Part A When iron rusts, solid iron reacts with gaseous oxygen to form solid iron(lII) oxide. Enter a…

A: The balanced chemical reaction has to be given.

Q: 4 For Ag atoms forming a nanoparticles of 25 A diameter, find: a) number of surface atoms Ns. b)…

A:

Q: Which expression correctly relates θ, d and λ? Explain using evidence from your observations

A: Following is the equation of θ, d and λ.

Q: What is umplung? Provide example.

A: Umpolung : Reversal of polarity. For example acetaldehyde is having electrophilic carbon.…

Q: A 42.7 gram sample of potassium nitrate contains how many grams of potassium?

A:

Q: A change in phase may occur when the energy of the particles is changed. ABSORPTION of energy will…

A: Please find your solution below : The answer is False. The capitalised words do not make the…

Q: A middle school student asks you why hot air rises. Explain in one to three sentences the reason…

A: When air  gets heated up it expands and become less dense than surrounding .