Do the relative proportions (or ratios) of elements in a given compound vary from sample to sample? Explain your answer. No, the elements in a given compound are always in fixed chemical proportions (or ratios).
Does a compound have different samples have different properties?
As you may have already learned, every element has its own unique set of physical and chemical properties, which enable us to tell them apart. The same can be said for compounds. When elements join together, they create a compound that has new and different properties than those of the individual elements.
Can the composition of a mixture vary depending on the sample?
The properties of a mixture can vary, because the composition of a mixture is not fixed. If amount one of substance in mixture is changed, the properties such system is also changed.
Do elements have a set ratio?
A compound contains atoms of different elements chemically combined together in a fixed ratio. An element is a pure chemical substance made of same type of atom. Compounds contain different elements in a fixed ratio arranged in a defined manner through chemical bonds.
How does each mixture differ?
A mixture is composed of one or more pure substances in varying composition. There are two types of mixtures: heterogeneous and homogeneous. Heterogeneous mixtures have visually distinguishable components, while homogeneous mixtures appear uniform throughout.
Can the ratio of elements in the same mixture vary from sample to sample?
Unlike a compound, which has a fixed, definite ratio, in a mixture one can vary the amounts of each component.
Can the composition of a compound vary?
Composition of Compounds and Mixtures
A compound is composed of two or more elements in a fixed ratio, so you cannot vary the amount of each element in a compound.
Which mixture Cannot be distinguished from each other?
A homogeneous mixture is a mixture of two or more chemical substances (elements or compounds), where the different components cannot be visually distinguished. The composition of homogeneous mixtures is constant.
Can the composition of a mixture vary?
A mixture is a combination of two or more substances in any proportions. The substances in a mixture do not combine chemically, so they retain their physical properties. A homogeneous mixture has the same composition throughout. A heterogeneous mixture varies in its composition.
Can a substance vary in composition?
Whereas pure substances have fixed compositions, the compositions of mixtures can vary. A cup of sweetened coffee, for example, can contain either a little sugar or a lot. The substances making up a mixture (such as sugar and water) are called components of the mixture.
Can compounds have different properties than their elements?
Compound. A compound is a pure substance whose smallest unit is made up of atoms of two or more elements joined by chemical bonds. Compounds have different properties than the individual elements that make up the compound. Compounds can only be separated by chemical means.
Which has the same properties throughout the sample?
Pure substance has the same properties throughout the sample.
How is a compound different from an element?
An element is a substance that cannot be chemically decomposed into simpler substances. An atom is the smallest particle of an element that can take part in chemical reactions. A compound is a substance formed from two or more elements chemically joined (bonded) together.
Are the properties of a compound the same as the properties of the elements it is made of?
The properties of compounds are different from the properties of the elements that form them—sometimes very different. That’s because elements in a compound combine and become an entirely different substance with its own unique properties.
How do you find the ratio of an element in a compound?
Find the ratio or the moles of each element by dividing the number of moles of each by the smallest number of moles. There are fewer moles of oxygen than any other element, so we will assume one mole of oxygen to establish the ratios.
What is the difference between element compound and mixture?
Element: Pure substance consisting of one type of atom. Compound: Pure substance consisting of two or more different atoms. Mixture: Two or more different substances not chemically combined.
Which mixture has components that Cannot be distinguished when mixed?
Homogeneous mixture in which components cannot be distinguished. Was this answer helpful?
What word describes different compounds which are found together but not combined chemically?
A mixture contains two or more different substances that are not chemically joined together. The different substances in a mixture can be elements and/or compounds. dome7w and 3 more users found this answer helpful.
In what three ways do compounds differ from mixtures?
COMPOUNDS | MIXTURES |
---|---|
Compounds are basically of three kinds : Ionic, metallic and covalent. | Mixtures are divided into two categories : Heterogeneous and homogeneous. |
They are pure substances. | They are impure substances. |
Can you easily distinguish each component Why?
Answer: there is 2 types of mixture: the heterogeneous mixture which you can easily distinguised it’s components because the solute is not fully dissolved and the homogeneous mixture or solution which you can’t easily distinguished it’s components because it’s solute is dissolved by the solvent.
How are pure substances and mixtures are the same and how they are different from each other?
a pure substance consists only of one element or one compound. a mixture consists of two or more different substances, not chemically joined together.
How are mixtures and pure substances alike and different?
Mixtures and pure substances are alike because mixtures are made up of two or more pure substances. This means that where pure substances have a single set of properties, mixtures may have two or more sets of the same properties, based on the pure substances that make up the mixture.
How does the ratio of components in a mixture compare with the ratio of elements in a compound?
A compound contains atoms of different elements chemically combined together in a fixed ratio. A mixture is a combination of two or more substances where there is no chemical combination or reaction. Compounds contain different elements in a fixed ratio arranged in a defined manner through chemical bonds.
Can composition vary in a homogeneous mixture?
A homogeneous mixture has the same composition throughout. A heterogeneous mixture varies in its composition. Mixtures can be classified on the basis of particle size into three different types: solutions, suspensions and colloids.
How is a mixture similar to a compound?
Both compound and mixture are combined in a definite ratio or in any proportion. Both compound and mixture consist of two or more substances/elements. Both compounds and mixtures have physical and chemical properties. The constituents or components of a mixture and compound can easily be separated.
What happens when you change the composition of a compound?
A CHEMICAL CHANGE alters the composition of the original matter. Different elements or compounds are present at the end of the chemical change. The atoms in compounds are rearranged to make new and different compounds.
Which is matter that can vary in composition?
A mixture is matter that can vary in composition. Mixtures are combinations of two or more substances that are physically blended together.
Why are the properties different compounds so different from each other?
this happens due to different elementary properties every element exhibits different no. of electrons and difference in shells and valence electrons and hence different elements combine differently with any other particular element.
Why do the properties of a mixture vary?
Why can the properties of a mixture vary? The properties of a mixture can vary because the composition of a mixture is not fixed. What is the difference between a solution, a suspension, and a colloid? A solution is when substances dissolve and form a homogenous mixture, and the mixture that forms is a solution.
Why are the properties of different compounds so different from?
Each compound is formed by a different set of elements. 2. Even with the same set of elements, different compounds are formed by varying numbers of constituent atoms.
Can the relative amounts of the components of a compound vary?
Yes. The amounts of the various components in the mixture can vary relative to each other. For example,a person could add one or two spoons of sugar to their coffee.
Are substances composed of two or more elements?
Compound : A substance made of two or more elements that are chemically combined in fixed amounts.
Which law states that a compound always contains the same elements in the same proportion by mass?
The law of definite proportions states that a given chemical compound always contains the same elements in the exact same proportions by mass.
Why is the ratio of different atoms in a compound important?
A compound is a combination or two or more elements held together by chemical bonds. Compounds can only be separated by chemical processes. Since chemicals are composed of different elements, determining the ratio between the elements can allow you to analyze how much of each compound is present.
Molecules Are Groups of Atoms
While many things in nature do come in their pure elemental form, there are of course many other things that do not. Instead, they are combinations of elements. When elements combine, they form molecules. A molecule is a group of two or more atoms chemically bonded together.
Does the sample of matter have the same properties throughout?
Any sample of matter that has the same physical and chemical properties throughout the sample is called a substance. There are two types of substances. A substance that cannot be broken down into chemically simpler components is an element.
Is pure substance has the same properties throughout the sample?
A pure substance is a form of matter that has a constant composition and properties that are constant throughout the sample. Mixtures are physical combinations of two or more elements and/or compounds. Mixtures can be classified as homogeneous or heterogeneous.
Is a physical combination of two or more?
A mixture is a physical combination of two or more substances where there is no chemical combination or reaction. Mixtures combine physically in no specific proportions.
Can a mixture be made only of elements?
Note that a mixture: consists of two or more different elements and/or compounds physically intermingled, can be separated into its components by physical means, and. often retains many of the properties of its components.
Do compounds have a set ratio?
Like water, all compounds consist of a fixed ratio of elements. It doesn’t matter how much or how little of a compound there is. It always has the same composition. All water molecules have two hydrogen atoms (red) and one oxygen atom (blue).
Is a ratio of the amount of each element to the total mass of elements in a compound?
Percentage composition of a compound is a ratio of an amount of each element to the total amount of individual elements in a compound, which is then multiplied with 100.
Which elements are least likely to react with other elements *?
Noble gases are the least reactive of all elements. That’s because they have eight valence electrons, which fill their outer energy level. This is the most stable arrangement of electrons, so noble gases rarely react with other elements and form compounds.
What is difference between H * * * * * * * * * * mixture and heterogeneous mixture?
1. A homogenous mixture is that mixture in which the components mix with each other and its composition is uniform throughout the solution. A heterogenous mixture is that mixture in which the composition is not uniform throughout and different components are observed. 2.
How did you identify whether the samples are substance or mixture?
If it is pure, the substance is either an element or a compound. If a substance can be separated into its elements, it is a compound. If a substance is not chemically pure, it is either a heterogeneous mixture or a homogeneous mixture. If its composition is uniform throughout, it is a homogeneous mixture.
What mixture that Cannot be distinguished from each other?
A homogeneous mixture is a mixture of two or more chemical substances (elements or compounds), where the different components cannot be visually distinguished. The composition of homogeneous mixtures is constant.
Which mixture did not look the same throughout?
On the other hand, a heterogeneous mixture is a type of mixture in which the makeup is not the same throughout. Heterogeneous mixtures are not mixed evenly, so they do not appear uniform.
Is a mixture of two or more substances mixed together but not chemically combined?
A mixture is made when two or more substances are combined, but they are not combined chemically. There are two main categories of mixtures: homogeneous mixtures and heterogeneous mixtures. In a homogenous mixture all the substances are evenly distributed throughout the mixture (salt water, air, blood).
Which substances when combined form a mixture but not a solution?
All solutions are mixtures because it is two or more substances mixed together. A mixture such as oil and water is not homogeneously dissolved and therefore not a solution.
Which mixture looked the same throughout?
A homogeneous mixture is a type of mixture that is considered to be the same throughout. Homogeneous mixtures are mixed evenly. Therefore, each part of the mixture seems to be the same. Examples of homogeneous mixtures are apple juice and the air.
Can you easily distinguish each component of heterogeneous mixture?
You can easily see the different things that make up this mixture: the milk and the cereal. Each spoonful will have different distributions of the components. A heterogeneous mixture has components that are not evenly distributed. This means that you can easily distinguish between the different components.
How is an element different from a compound?
An element is a substance that cannot be chemically decomposed into simpler substances. An atom is the smallest particle of an element that can take part in chemical reactions. A compound is a substance formed from two or more elements chemically joined (bonded) together.
How does each mixture differ?
A mixture is composed of one or more pure substances in varying composition. There are two types of mixtures: heterogeneous and homogeneous. Heterogeneous mixtures have visually distinguishable components, while homogeneous mixtures appear uniform throughout.
How will you differentiate elements compounds mixtures and pure substances from each other?
a pure substance consists only of one element or one compound. a mixture consists of two or more different substances, not chemically joined together.
What is one difference between a compound and a mixture?
A compound is the substances that are formed by combining two are more chemical elements. A mixture is a substance created from two or more matter that can be separate with the help of physical methods. Compound substances are always homogeneous in nature.