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The most probable formula for a compound of silicon and hydrogen is SiH₄, known as silane. In this compound, silicon forms four single covalent bonds with four
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Chemistry
What does reactivity do for free metals when you move left to right?
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As you move left to right across the periodic table, the reactivity of metals generally decreases. This trend occurs because the atomic number increases, leadin
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Chemistry
How does sulfide ion obtain its charge?
Asked by Anonymous
The sulfide ion (S²⁻) obtains its charge by gaining two electrons. Sulfur, which has six valence electrons, tends to gain two additional electrons to achieve a
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Chemistry
What two properties make tungsten a good material for ligt bulb to filaments?
Asked by Anonymous
Tungsten is an excellent material for light bulb filaments due to its high melting point, which is around 3,422°C (6,192°F), allowing it to withstand the intens
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Chemistry
What is the combination called into different substances are chemically bonded together?
Asked by Anonymous
The combination of different substances that are chemically bonded together is called a compound. Compounds are formed when two or more elements undergo a chemi
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Chemistry
When water freezes each gram loses an amount of heat equal to its heat of?
Asked by Anonymous
When water freezes, each gram loses an amount of heat equal to its heat of fusion, which is approximately 334 joules per gram. This energy is released as the wa
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Chemistry
+2
If any contains the greatest number of oxygen atoms?
Asked by Anonymous
To determine which compound contains the greatest number of oxygen atoms, one would need to compare specific chemical formulas. For example, compounds like ozon
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Chemistry
Is Mylar flamable?
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Mylar, a type of polyester film, is generally considered to be flame-resistant, but it is not completely non-flammable. When exposed to high temperatures or ope
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Chemistry
Is microwaving chicken nuggets a physical or chemical change?
Asked by Anonymous
Microwaving chicken nuggets is primarily a physical change. The heat from the microwave causes the water molecules in the nuggets to heat up, resulting in chang
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Chemistry
What is another name for the molecular orbital theory of bonding in metals?
Asked by Anonymous
Another name for the molecular orbital theory of bonding in metals is the band theory. Band theory describes how atomic orbitals combine to form energy bands, w
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Chemistry
Does Ca react with water at room temperature?
Asked by Anonymous
Calcium (Ca) does react with water at room temperature, although the reaction is not as vigorous as that of more reactive alkali metals. When calcium is added t
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Chemistry
Why is it important to know the properties of these kinds of organic compounds?
Asked by Anonymous
Knowing the properties of organic compounds is crucial for several reasons. It aids in predicting their behavior in chemical reactions, which is essential for f
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Chemistry
What is the element used in making phosphors used in television?
Asked by Anonymous
The element primarily used in making phosphors for televisions is zinc, specifically in the form of zinc sulfide (ZnS). Other elements like europium and terbium
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Chemistry
What should be you first action upon being notified of a chemical attack?
Asked by Anonymous
Upon being notified of a chemical attack, your first action should be to seek immediate shelter in a secure location, ideally indoors, to minimize exposure. Clo
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Chemistry
What is the Lewis dot for polydimethylsiloxane?
Asked by Anonymous
Polydimethylsiloxane (PDMS) is a polymer composed of repeating units of siloxane (Si-O) with methyl groups (CH₃) attached to the silicon atoms. The Lewis dot st
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Science
+1
Why are samples initially hydrolysed with nitric acid before the molybdate test is carried out?
Asked by Anonymous
Samples are initially hydrolyzed with nitric acid to convert complex organic and inorganic compounds into simpler forms, ensuring that all relevant phosphorus s
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Chemistry
What is melting point of xanthan gum?
Asked by Anonymous
Xanthan gum does not have a specific melting point like crystalline substances because it is a polysaccharide and exists as a solid that dissolves in water. Ins
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Chemistry
How is radius of an atom determined?
Asked by Anonymous
The radius of an atom is typically determined by measuring the distances between the nuclei of two bonded atoms in a molecule, often using techniques like X-ray
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Chemistry
What symbols is an organic molecule?
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An organic molecule is typically characterized by the presence of carbon (C) atoms bonded to hydrogen (H) atoms, and often includes other elements such as oxyge
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Chemistry
+2
What is the pH of concealer?
Asked by Anonymous
The pH of concealer can vary depending on its formulation and brand, but most cosmetic products, including concealers, typically have a pH range between 5 and 7
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Chemistry
What is electrode E70XX?
Asked by Anonymous
Electrode E70XX refers to a classification of welding electrodes used for shielded metal arc welding (SMAW), specifically designed for welding low-alloy and hig
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Chemistry
What temperature is required for the cell potential to be the standard cell potential?
Asked by Anonymous
The standard cell potential is defined at a temperature of 25°C (298 K). At this temperature, the conditions for standard state are met, which include 1 M conce
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Chemistry
What three metas that react with cold water?
Asked by Anonymous
Three metals that react with cold water are sodium, potassium, and lithium. These alkali metals react vigorously with water, producing hydrogen gas and correspo
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Chemistry
How do you convert toluene to aniline?
Asked by Anonymous
To convert toluene to aniline, you can first nitrify toluene to form nitrotoluene using a mixture of concentrated nitric and sulfuric acids. Then, the nitrotolu
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Chemistry
+2
How do you draw atomic diagrams?
Asked by Anonymous
To draw atomic diagrams, start by identifying the element's atomic number, which tells you the number of protons and, in a neutral atom, the number of electrons
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