1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ra1l [238]
3 years ago
7

What percent of the universe's age is the first 400,000 years?

Chemistry
1 answer:
Harlamova29_29 [7]3 years ago
3 0

Answer:

the globuler cluster

Explanation:

hope this helps maybe next time show anwsers

You might be interested in
Write an introductory text about metals, adding details you know
Serggg [28]

Answer:

See below

Explanation:

Most of the elements found on earth are metals. A look at the periodic table shows that these elements occupy the entire left-hand stretch of the table, from the main group, through the transition metals, lanthanides, actinides, alkali and alkaline earth elements. One element included here, hydrogen, is rarely classified as a metal. On earth, hydrogen is a gas, and it is usually classified as a non-metal, like oxygen and nitrogen. However, at very low temperatures and very high pressures, hydrogen is a solid, and under the right conditions it is expected to behave more like a metal. It is thought that gas giants, such as Jupiter and Saturn in our solar system, may have metallic hydrogen cores. Metallic elements are not generally found as single atoms. Instead, the atoms in an element such as iron cluster together to make a larger structure. The materials formed in this way have some similar properties. Metals are shiny. Metals are malleable; they can be bent and formed into different shapes (at least when heated). Metals are good conductors of electricity. In metals, large groups of atoms cluster together. Metal atoms form large, extended arrays, with the atoms repeating in specific patterns throughout the solid.

The properties of metals are really important. The fact that metals are malleable allows them to be formed into sheets that can be used to make cars, airplanes, railway lines, cargo containers and ships, as well as more delicate items such as jewelry and surgical tools. A related property, ductility, allows metals to be stretched into long, thin wires. Together with the conductivity of metals, this property allows transmission lines to carry electricity from generating stations to people like you. Sometimes, the source of electricity is hundreds of miles away; electricity used to power a laptop in New York may come from places like La Grande Baleine or James Bay, in northwestern Quebec. Some of these properties can be understood by thinking about the structure of metallic elements. A great deal of our structural understanding of metals and other materials comes from x-ray diffraction studies. A very focused beam of x-rays can be sent into a material, where they will bounce off the atoms and scatter in different directions. The outcome sounds chaotic, but if the solid is highly organized, the x-rays behave in very predictable ways. The result is an x-ray diffraction pattern. A diffraction pattern is a little like the pattern of ripples on a pond when a stone is thrown into calm water. The pattern can be studied and decoded mathematically to find the locations of the atoms within the material. X-ray diffraction can reveal the atomic-level structures of highly ordered materials such as metals. What does x-ray diffraction tell us? Evidently, a chunk of metal is not just a mass of atoms stuck together randomly. Instead, the atoms arrange themselves in neat layers in very specific ways. These layers of atoms sit on top of each other to form a three-dimensional solid. One of the properties that results from this organized arrangement of atoms is the malleability of metals. If you take a nice, soft metal such as copper, after annealing it in a fire or oven, it can be bent and shaped easily. With copper, this can be done even after the metal has cooled to room temperature. When you bend the copper, you are actually causing layers of atoms to slide over each other, until you stop bending and they come to rest in a new location. If you have ever done this, you'll know that the more you work with the copper, the harder it is to bend. That's because while you are sliding layers of atoms back and forth, occasionally an atom (or an entire row of atoms) slips out of place. It is no longer part of a smooth layer, and so other atoms can't slide past it as easily. This situation is called a defect. Once there are enough defects in the metal, it is impossible to bend the material anymore. Metal atoms are found in organized layers. Because these layers can roll over each other, metals can be worked into different shapes.

3 0
2 years ago
What is the average of the two weights of a nickel and dime. Dime is 2.26g and nickel is 4.97g?
ANTONII [103]
  • Dime=2.26g
  • Nickel=4.97g

\\ \rm\Rrightarrow Avg\:Weight=\dfrac{Sum\:of\:Weights}{No\:of\:weights}

\\ \rm\Rrightarrow Avg\:weight=\dfrac{2.26+4.96}{2}

\\ \rm\Rrightarrow Avg\;weight=\dfrac{7.23}{2}

\\ \rm\Rrightarrow Avg\:Weight=3.6g

5 0
2 years ago
The molar mass of SO3 is grams. in significant figures
Vikentia [17]

Answer:

80.066 g/mol

Explanation:

I looked it up

6 0
3 years ago
Read 2 more answers
Why don't solids change shape?
navik [9.2K]
Solids are compounds whose atomic bonds are rigid, which doesn't let the atoms move around freely
7 0
3 years ago
Read 2 more answers
During the recharge of the lead storage battery, the chemical reaction that occurs is A.)nonspontaneous.
Paha777 [63]
The chemical reaction that occurs is spontaneous. By the time the battery will recharge the cycle lead sulfate (sulfation) starts to reconvert into sulfuric acid and also with lead. Also, during the reviving procedure as power courses through the water part of the electrolyte and water, (H2O) is changed over into its unique components, hydrogen, and oxygen.
4 0
3 years ago
Other questions:
  • Density is the amount of matter per space or mass/volume.
    14·1 answer
  • In the periodic table, the period number indicates
    8·1 answer
  • Which component of an item has the least mass
    6·1 answer
  • PLEASE HELP ME!!
    6·2 answers
  • `One way to make ammonia is to synthesize it directly from elemental nitrogen and hydrogen (though this isn't that easy). The eq
    12·2 answers
  • Calculate the change in temperature that occurs when 3.50 x 10^-2kg of copper heated by 635 J of energy. Ccu = 0.385 j/gxC
    10·2 answers
  • What is true of neutrons?
    14·1 answer
  • Can someone please help me with this quickly thank you
    8·1 answer
  • A 8.5-liter sample of a gas has 1.2 mole of the gas. If 0.65 mole of the gas is added, what is the final volume of the gas? Temp
    14·2 answers
  • Which correctly lists two characteristics of crystal faces that define crystal systems?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!