Explain why snow is not a pure element. What is the composition of snow? Describe its solid phase and interactions between other particles of snow through intermolecular attractions.

Q: A substance formed of crystals of equal numbers of cations and anions held together by ionic bonds…

A: Answer is b.)  salt.

Q: which of the sub-atomic particles is commonly represented by this symbol:"e-"?

A: An ATOM is the smallest unit of ordinary matter that forms a chemical element. Every solid, liquid,…

Q: What is the difference between molecular mass and formula mass? Between molecular mass and molar…

A: Atoms are the basic building blocks of matter. Molecules are defined as the particle contains two or…

Q: why lung and soft tissue appear different on a radiograph when they have both an effective atomic…

A: The radio graphic image will appear according to the effective atomic number.

Q: Which of the following substances will have the greatest lattice energy? MgS NaF MgO CaO

A: Lattice energy can be defined as the energy required to convert one mole of an ionic solid into…

Q: IDENTIFY THE FOLLOWING PARTS  -  A  B  C  D  E  F  G  H  I  J  K

A: The given diagram is a 3D model of a eukaryotic cell as we can see the membrane-bound organelles…

Q: Distinguish between activity of metal and activity of nonmetal

A: Scientists classify elements based on their properties. Based on the chemical and physical…

Q: What are direct materials? Explain with an example?

A: Direct material is also known as raw material which convert itself to the final product

Q: The atomic mass number of an atom is determined by the sum of the number of in the atom. (a) protons…

A: The total number of neutrons and protons in an atomic nucleus is called atomic mass number.

Q: The most important peculiarity of water when compared to other solvents is that water has إختر أحد…

A: Water is a polar molecule  and it is called the universal solvent

Q: Elements have varying numbers of protons, neutrons, and electrons.True or false?

A: Atom is the smallest particle of an element that is composed of subatomic particles such as,…

Q: What is the smallest unit of an element that retains the properties of that element

A: An element is a pure product in chemistry that can not be broken down by chemical means, consisting…

Q: Describe the differences among acids, bases, and salts.

A: A solution is said to be a acidic, basic and salts and can be categorized on the basis of their…

Q: In the image above, the substance indicated as B is a(n) ____.

A: Enzymes are biological catalysts that increase the rate of chemical reactions happening inside the…

Q: Which of the following is a characteristic property of matter that could be used to identify an…

A: Physical and chemical qualities exist in all matter. Physical attributes, such as mass, colour, and…

Q: If 10 magnesium atoms and 10 chlorine atoms were allowed to bump into each other, could they combine…

A: Magnesium and Chlorine combine to form salt magnesium chloride, MgCl2, where one magnesium cation…

Q: How does the atomic structure or composition of the versions of sodium in question C above differ…

A: According to the question, We have to explain how does the atomic structure or composition of the…

Q: Describe the characteristics of transition metals.

A: Elements that have d orbit partially filled are known as Transition elements. These metals come…

Q: Which of the following correctly identifies the number of each element involved in the chemical…

A: The chemical formulas of a given molecule represent the simple ratios or the number of molecules of…

Q: What is the surface of Mercury like?

A: Hello, thank you for your question, We are helping you with answer.

Q: What do you mean by ground substance?

A: The extracellular matrix is a 3-D network of extracellular molecules, such as collagen,…

Q: if 10 magnesium atoms and 10 chlorine atoms were allowed to bump into each other, could they combine…

A: The study of chemical reactions that occurs within living organisms is called biochemistry. This…

Q: each

A: There are three main  types of chemical bonds :they are 1. Covalent bonds 2 .Ionic bonds  3.Metallic…

Q: Is silica polar or nonpolar?

A: Chromatography is a technique that is used to separate a mixture of substances that are dissolved in…

Q: A. List the five tests from your lab report and answer positive or negative for the following…

A: The given structure is of aldopentose.

Q: _____________ are macromolecules with no fixed molecular weights.

A: A macromolecule is a biomolecule which large in size and high molecular weight.

Q: Distinguish between heterogeneous and homogeneous mixtures and between solutions and colloids.

A: A mixture is a combination of two or more substances which are physically combined but not…

Q: Decide whether the following are chemical or physical mixtures.

A: The matters are everything around the ecosystem. The matters must have some weight and it has to…

Q: Apply the formula for the differences in electronegativities, for the following molecules, and…

A: Electronegativity is determined between two atoms of a molecule. It measures the capacity of an atom…

Q: _____________ compounds exclude water.

A: Rule of thumb that states that "like dissolves like" which means that polar molecules are dissolved…

Q: Arrange the elements Na, Si, and S in the order of (a) decreasing atomic radius. (h) increasing…

A: Atomic radius: It is half the distance between nuclei of two atoms of the same element when the…

Q: Which of the following is incorrect about waxes?

A: The question is all about the wax that is used in our daily needs like in cosmetics, candles, car…

Q: Define the following terms: a. hydronium ion b. acid c. base d. Ka e. pKa

A: In the solution, when a compound reacts, there is a formation of the product. In the chemical…

Q: if 10 magnesium atoms and 10 chlorine atoms were allowed to bump into each other, could they…

A: Magnesium has electronic configuration- 12- 2,8,2 Chlorine has electronic configuration- 17- 2,8,7…

Q: Contrast acids and bases, and discuss their properties.

A: The whole of the living and non living world are made of various elements. These are metallic or non…

Q: What is the difference between organic and inorganic compound?

A: Compounds  Compounds are said to be of two types; organic and inorganic compounds. These are the…

Q: Why do you think compounds containing the heavy metal lead are poisonous?

A: Heavy metals are chemical elements that have high density and very toxic or poisonous even at their…

Q: Match the structure formula to the chemical formula for this substance

A: According to the question, a molecular structure is given. Now, we have to match the structural…

Q: A topping for ice cream contains fructose, hydrogenated soybean oil, salt, and cellulose. What types…

A: Atoms are small substances that together make molecules and compounds.

Q: Distinguish between polar and ionic compounds.

A: A polar bond is formed due to sharing of electrons and ionic bonds are formed by a complete…

Q: Referring to PHC elements, why is PHC not relevant today

A: *Primary health care system* PHC is a whole-of-society approach to health that aims to ensure the…

Q: If a DNA molecule is found to be 16% Guanine, how much Thymine is in the molecule?

A: Question - If a DNA molecule is found to be 16% Guanine, how much Thymine is in the molecule?