Which of the following is an example of a homogeneous mixture? A. Bronze
B. Sand
C. Copper
D. Zinc

Answers

Answer 1

Answer: Homogeneous (in terms of Chemistry) means "in the same physical state"

For example if Nitrogen and Hydrogen reacted, and they were both gases, the reaction would be homogeneous.

Sand is a compound, so therefore not a mixture.

Copper and Zinc are both elements, so again, not a mixture.

Bronze is an alloy, a mixture of Copper and Tin. As Copper and Tin are both solid (metals), we can say this mixture is homogeneous.

The answer is (A) Bronze.

Answer 2

Answer:

The correct answer is:

A. Bronze

Explanation:

Bronze is an alloy consisting principally of copper, generally with about 12% tin and often with the extension of other metals and sometimes non-metals or metalloids such as arsenic, phosphorus or silicon.Both copper and tin are solid.

A homogeneous mixture is a solid, liquid, or gaseous mixture that has the same proportions of its components throughout any given sample. Conversely, a heterogeneous mixture has elements whose dimensions vary completely the sample. Water itself is an example of a homogeneous mixture. It often includes dissolved metals and gases, but these are removed throughout the water.

Related Questions

All of the following are abiotic factors in an ecosystem except nutrients sunlight rain bacteria
How many grams are there in 7.4x10^23 molecules of Na2SO4?
Driving cars lowers the pH of the oceans by _______.a.releasing CO2 that dissolves and forms acid in the oceansb.releasing pollutants that lead to smogc.releasing CO that dissolves and forms acid in the oceansd.releasing pollutants that lead to acid rain
Who thought everything was made from fire,earth,air and water
Eisenhower, Kennedy, and Johnson all approved of the United States backing the South Vietnamese in their civil war.a. Trueb. False

An analysis of an oxide of nitrogen with a molecular weight of 92.02 amu gave 69.57% oxygen and 30.43% nitrogen. What are the empirical and molecular formulas for this nitrogen oxide? Complete and balance the equation for its formation from the elements nitrogen and oxygen.

Answers

The empirical formula is No2 and molecular formula is N2O4

empirical formula calculation

find the moles of each reactant

=% composition/molar mass

molar mass of oxygen=16 g/mol ,while hat of nitrogen= 14 g/mol from periodic table

moles is therefore=

nitrogen= 30.43/14=2.174 moles

oxygen= 69.57/1 6=4.348 moles

find the mole ratio by dividing each moles with smallest number of mole( 2.174)

nitrogen = 2.174/2.174= 1

oxygen = 4.348/2.174=2

The balanced equation for its formation from the element nitrogen and oxygen is as below

N2 +2 O2 → N2O4

therefore the empirical formula= NO2

molecular formula calculation

[NO2] n= 92.02 amu

[(14) + (16x2)]n = 92.02 amu

46n= 92.02

divide both side by 46

n=2

therefore the molecular formula is gotten by multiplying the empirical formula by 2= [NO2]2= N2O4

What moves in or out of a substance during a change of state?

Answers

Heat, which is energy, moves in or out of a substance during a change of state.

What is in the center of our solar system ? Name three physical features of this object .

Answers

Answer: The Sun is present in the center of solar system whose features are color, mass and texture.

Explanation:

Our solar system consists of one star and 8 planets. The star is present in our solar system is the Sun and due to this star only, our solar system is named as such.

The planets present in our solar system are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.

These planets revolve around the star which is present at the center of the solar system.

Three physical features of Sun are:

Color: The color of Sun is yellow.
Mass: The mass of the Sun is $1.98892* 10^(30)kg$
Texture: Due to the convectional currents, the texture of the whole surface of sun is granular.

Hence, the Sun is present in the center of solar system whose features are color, mass and texture.

The sun. Light, heat and radiation

You fill a balloon with 2.50 moles of gas at 25°C at a pressure of 1.49 atm. What is the volume of the balloon?

Answers

You need to use the ideal gas equation:

$PV = nRT$

P is pressure (in atm or bar)

V is volume (in L)

n is the number of moles (in mol)

R is an experimentally determined ratio of about 0.82

T is the temperature (in Kelvin)

Note: For all gases, you need to convert Celsius or Fahrenheit to Kelvin.

$25C + 273.15 = 298.15K$

Get V alone.

$V = (nRT)/(P)$

Plug in the values you have.

$V = (2.50 mol * 0.82 * 298.15 K)/(1.49 atm)$

you get:

$V = 611.2075L$

A fun fact: the gas used to fill up a balloon is Helium.

Which is a diatomic molecule?
A. Ar
B. CO
C. CO2
D. NaCl

Answers

NaCI is the answer, in what my teacher taught me. Hope I helped :)

Which occurs when two fluorine atoms react to produce a fluorine molecule?(1) Energy is absorbed as a bond is broken.
(2) Energy is absorbed as a bond is formed.
(3) Energy is released as a bond is broken.
(4) Energy is released as a bond is formed.

Answers

The answer is 4. When atoms mix to create a compound, energy is continuously set off, and the compound has a lesser total energy. When a chemical reaction happens, molecular bonds are shattered and other bonds are made to create unalike molecules. For instance, the bonds of two water molecules are shattered to make hydrogen and oxygen.

The change that occurs when two fluorine atoms react to produce fluorine molecule is $\boxed{\left( 4 \right){\text{ Energy is released as a bond is formed}}}$ .

Further Explanation:

The attraction between different atoms, molecules and ions is known as a chemical bond. Such bonds are responsible for the formation of chemical compounds.

An ionic bond is formed as a result of the interaction between a metal and a non-metal. Metals have the tendency to lose electrons while non-metals tend to gain electrons. Due to this, metal atoms form cations by loss of electrons and non-metals become anions with the gain of electrons.

A covalent bond is formed by the mutual sharing of electrons between the bonded atoms. It is also called molecular bond. Such bonds usually exist between two or more non-metals.

The atomic number of fluorine is 9 and it has a configuration of $1{s^2}2{s^2}2{p^5}$ . It is just one electron short of the stable configuration of neon. When two fluorine atoms approach each other, both share one of their valence electrons and form a single covalent bond. Since ${{\text{F}}_{\text{2}}}$ formed has a complete octet, its stability is quite high. The two fluorine atoms tend to bond with each other to form fluorine molecule so energy is released during the process. Therefore option (4) is correct.

Learn more:

Identification of ionic bonding: brainly.com/question/1603987
What type of bond exists between phosphorus and chlorine? brainly.com/question/81715

Answer details:

Grade: High School

Subject: Chemistry

Chapter: Ionic and covalent compounds

Keywords: chemical bond, ionic bond, covalent bond, fluorine, 9, neon, stability, octet, configuration, electron, fluorine atoms, fluorine molecule. Energy.

Other Questions

Aluminum chloride and cesium undergo a single replacement reaction. What is the correct chemical equation for this reaction?a. AlCl3 + 3Cs yields No Reactionb. AlCl2 + 2Cs yields 2CsCl + Alc. AlCl3 + 3Cs yields 3CsCl + Ald. 2AlCl3 + 6Cs yields 2AlCs3 + 3Cl2

N which phase(s) of matter are the atoms closely packed but still able to slide past each other?gasliquidsolid and gasliquid and solid

What is the difference between conductors and insulators

10) which of the following compounds is a saturated hydrocarbon? A) CH3CH2OH B) CH CH C) ethyne CO CH3CHO 1) which compound is an unsaturated hydrocarbon? CA hexane B) hexanoic acid henne D) ethane. D) CH CH