answersLogoWhite

0

🧪

Metal and Alloys

Metals are elements that are good conductors of electricity. An alloy is a metal made up of more than one element. Combining a metal with another metal or non-metal (alloying) can often improve the material's strength.

500 Questions

1.45gm of sample of chromium contains how much atoms?

User Avatar

Asked by Wiki User

To determine the number of atoms in 1.45g of chromium, you need to calculate the number of moles of chromium using its molar mass (51.996 g/mol) and then use Avogadro's number (6.022 x 10^23 atoms/mol) to find the number of atoms. By dividing the mass of the sample by the molar mass, you can find the moles present, and then multiply the moles by Avogadro's number to find the number of atoms.

What is the chemical formula for scandium nitrate?

User Avatar

Asked by Wiki User

Scandium and nitrogen are elements and have chemical symbols, not formulas. The symbol for the element scandium as it appears on the periodic table is Sc, and the symbol for the element nitrogen is N.

What two letters are the symbol for calcium?

User Avatar

Asked by Wiki User

The symbol for calcium is Ca.

Liquid at room temperature mercury or cobalt?

User Avatar

Asked by Wiki User

Mercury is liquid at room temperature, while cobalt is a solid metal. Mercury has a low melting point, allowing it to remain in a liquid state at room temperature, while cobalt's melting point is significantly higher, causing it to be a solid at room temperature.

Difference between cobalt blue and royal blue?

User Avatar

Asked by Wiki User

Cobalt blue is a vivid deep blue with a slightly purplish tone, while royal blue is a brighter, more vibrant blue with a slight touch of purple. Royal blue is often described as a rich, regal blue color, while cobalt blue is darker and more intense.

What new uses for steel were developend at this time?

User Avatar

Asked by Wiki User

During the 19th century, steel was used for building construction, bridges, railroads, and weaponry due to its strength and durability. It revolutionized architecture by allowing for taller and more intricate structures to be built, while also enabling the development of faster and more efficient transportation systems. Additionally, steel became a primary material for manufacturing machinery and tools, leading to advancements in industrial processes.

How do manganese nodules form?

User Avatar

Asked by Wiki User

Manganese nodules form through precipitation of manganese and other minerals over long periods of time on the sea floor. These nodules grow layer by layer around a nucleus such as a shark tooth or shell, and can take millions of years to reach substantial sizes.

What is the dv for sodium?

User Avatar

Asked by Wiki User

The daily value (DV) for sodium is 2,300 milligrams per day, as recommended by the Food and Drug Administration (FDA) for a 2,000-calorie diet.

Is gatorade a metal nonmetal or a metalloid?

User Avatar

Asked by Wiki User

As a physical mixture Gatorade would not be up for consideration to classify as any of these. We normally only classify ELEMENTS as metals, metalloids, and non-metals. It is mostly composed of water - which is composed of the non-metals hydrogen and oxygen, sugars - the molecules of which are made up of the non-metals hydrogen, oxygen and carbon (although carbon is occasionally classified as metalloid), and some salts of sodium and potassium - both metals, but bonded with chlorine, a non-metal, in the salts.

What is the total number of atoms in chromium III sulfate?

User Avatar

Asked by Wiki User

The chemical formula for chromium III sulfate is Cr2(SO4)3. This means that there are 2 chromium atoms, 3 sulfur atoms, and 12 oxygen atoms in each formula unit. Therefore, the total number of atoms in chromium III sulfate is 2 (Cr) + 3 (S) + 12 (O) = 17 atoms.

What is the greenish film on bronze called?

User Avatar

Asked by Wiki User

The greenish film on bronze is called patina. It forms naturally over time as the bronze reacts with elements in the environment, such as oxygen and moisture. Some people consider patina to enhance the appearance of bronze.

Why is aluminium corrosion free?

User Avatar

Asked by Wiki User

Aluminum is corrosion-resistant due to a thin protective oxide layer that forms on its surface when exposed to oxygen. This layer acts as a barrier, preventing further oxidation and corrosion from occurring. Additionally, aluminum's high reactivity with oxygen helps to quickly reform this protective oxide layer if damaged.

How do you separate gold from alloys?

User Avatar

Asked by Wiki User

One common method to separate gold from alloys is through the process of cupellation. In this method, the alloy is heated with lead in a furnace, which oxidizes the metal components other than gold. The resulting lead oxide is then absorbed by a porous cupel leaving behind pure gold.

A uniform lead sphere and a uniform aluminium sphere have the same mass what is the ratio of the radius of aluminium sphere to the radius of the lead sphere?

User Avatar

Asked by Wiki User

The ratio of the radii of the aluminum sphere to the lead sphere would be the cube root of the ratio of their densities since mass is the same. The density of lead is higher than that of aluminum, so the aluminum sphere will have a larger radius.

What is the name of CdCl2?

User Avatar

Asked by Wiki User

Cadmium (Ⅱ) Chloride

How many moles of magnesium a chloride are produced when a 4.3 grams piece of magnesium is placed in a bottle of hydrochloric acid large enough to completely react with the magnesium?

User Avatar

Asked by Wiki User

The chemical equation for the reaction between magnesium and hydrochloric acid is: Mg + 2HCl -> MgCl2 + H2. To find the moles of magnesium chloride produced, first calculate the moles of magnesium reacting using its molar mass. Then, since the ratio between magnesium and magnesium chloride is 1:1, the number of moles of magnesium chloride produced will be the same as the moles of magnesium reacting.

What is the formula for Magnesium sulfide soldi and hydrochloric acid react to form hydrogen sulfide gas and magnesium chloride solution?

User Avatar

Asked by Wiki User

The chemical equation for this reaction is: MgS (s) + 2HCl (aq) --> MgCl2 (aq) + H2S (g). This reaction is a double displacement reaction where the sulfide ion from magnesium sulfide combines with the hydrogen ion from hydrochloric acid to form hydrogen sulfide gas and magnesium chloride solution.

What are the Neutralizing medium for nickel-cadmium battery used in aircraft if electrolyte is spilled?

User Avatar

Asked by Wiki User

Neutralizing medium for spilled nickel-cadmium battery electrolyte in aircraft may include baking soda or sodium bicarbonate. These substances can help in neutralizing the acidity of the spilled electrolyte, reducing the risk of corrosion or damage. It is important to follow proper safety protocols and guidelines when handling and neutralizing spilled electrolyte.

What objects are made out of cobalt?

User Avatar

Asked by Wiki User

Some objects that can be made out of cobalt include aircraft engines, magnets, batteries, and pigments in ceramic glazes and glass. Cobalt is also commonly used in the production of steel and alloys for various industrial applications.

What is the chemical formula for chromite?

User Avatar

Asked by Wiki User

Commercially anhydrous chromium(III) chloride may be prepared bychlorination of chromium metal directly, or indirectly by chlorination ofchromium(III) oxide in the presence of carbon at 650--800 °C, with carbon monoxide as a side-product:[3]

Cr2O3 + 3 C + 3 Cl2 → 2 CrCl3 + 3 CO

It may also be prepared by treating the hexahydrate with thionyl chloride:[4]

CrCl3·6H2O + 6 SOCl2 → CrCl3 + 6 SO2 + 12 HCl

Strips of aluminium foil to obstruct radar detection?

User Avatar

Asked by Wiki User

While aluminium foil can block or reflect radar waves, it may not be effective for obstructing radar detection in a real-world scenario. Radar systems are designed to detect signals even when they are partially obstructed or reflected. It's more effective to use specialized materials and techniques to evade radar detection in military applications.

Can potassium be cut with a knife?

User Avatar

Asked by Wiki User

Yes, potassium is a soft metal and can be easily cut with a knife. However, caution must be taken as the freshly cut surface of potassium reacts vigorously with oxygen and moisture in the air, leading to fire or explosion.

Which of the following substances can be separated into several elements nitrogen air aluminum and why not zinc?

User Avatar

Asked by Toriixo

Aluminum can be separated into its elements because it is a pure substance composed of only one type of atom. Similarly, nitrogen can be separated into its elemental form because it is a diatomic molecule. Zinc, on the other hand, is already an element and cannot be separated into simpler substances through normal chemical processes.

Is copper wire a chemical property?

User Avatar

Asked by Wiki User

No, copper wire is a physical property of copper. Chemical properties describe how a substance interacts with other substances to form new substances, while physical properties describe the characteristics of a substance without changing its chemical composition.

The bond formed when Magnesium combines with oxygen is?

User Avatar

Asked by Wiki User

The bond formed when magnesium combines with oxygen is an ionic bond. Magnesium donates two electrons to oxygen, forming the compound magnesium oxide. Oxygen becomes negatively charged while magnesium becomes positively charged, resulting in the attraction between the two ions.