The chemical formula of a compound is X2Y3. If there are 12 atoms of Y, how many atoms of X are there? A. 6 atoms B. 8 atoms C. 10 atoms D. 12 atoms 相关知识点: 试题来源: 解析 B。由化学式 X2Y3 可知,X 和 Y 的原子个数比为 2:3,Y 有 12 个原子,设 X 有 x 个原...
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Chemical formulas describe the type and number of atoms within a compound. The molecular formula lists the symbol of each element within the compound followed by a number (usually in subscript). The letter and number indicate how many of each type of element are in the compound. If there is...
No atoms are destroyed or created. The bottom line is: Matter cycles through the universe in many different forms. In any physical or chemical change, matter doesn't appear or disappear. Atoms created in the stars (a very, very long time ago) make up every living and nonliving thing on ...
How many atoms are in a human? It is hard to grasp just how small the atoms that make up your body are until you take a look at the sheer number of them. An adult is made up of around7,000,000,000,000,000,000,000,000,000 (7 octillion) atoms. ...
Science How many hydrogen atoms are in a molecule of water?Question:How many hydrogen atoms are in a molecule of water?WaterWater is the common name that we use for the chemical compound H20. Water is a pure substance because it's a compound that's composed of the same kind of ...
To determine how many compounds have a zero dipole moment from the given options, we will analyze each compound based on its molecular geometry and the electronegativity of its atoms. 1. CH₃Cl (Methyl Chloride): - Structure: Tetrahedral - Chlorine is more electronegative than carbon, creating...
How many atoms of chlorine are in 25.3 g of C2Cl6? a) How many molecules of carbon dioxide are present in 4.13 moles of this compound? b) How many moles of carbon dioxide are present in 4.87\times 10^22 molecules of this compound?
If a chemical symbol has a subscript associated with it, there are multiple atoms of that element in the compound. Unless they are part of a polyatomic ion, each atom of that element is an individual ion. For example, iron (III) sulfate is written Fe2(SO4)3. The +3 oxidation state of...
How many hydrogens does the following compound have: {eq}C_8H_?O_2 {/eq}, has two rings and one double bond? Degree of Unsaturation Using the number of carbon, hydrogen, nitrogen and halogen atoms present in a compound, one will be able to determine the ...