百度试题 结果1 题目How many atoms are in the formula Na2S2O3• 5 H2O? ( ) A. 12 B. 29 C. 18 D. 32 E. 22 相关知识点: 试题来源: 解析 E 反馈 收藏
To calculate the number of atoms in a formula, the weight of a sample, its atomic mass from the periodic table and a constant known as Avogadro's number are needed. Step 1: Find the Molar Mass of the Formula Find a periodic table of elements to find the molar mass of your sample. I...
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...
Determine themolecular formulaof the molecule. Use the periodic table to determine theatomic massof each element in the molecule. Multiply each element'satomic massby the number of atoms of that element in the molecule. This number is represented by the subscript next to the element symbol in ...
And this data is repeated 20 times with different values of xyz coordinates each time, so I want to pick up only the second row and the fourth row and calculate the distance formula for these two points of each data table. so the result has to ...
Mole Ratio from a Chemical Formula Vocabulary and Formulas Avogadro's number:Avogadro's number is a very large number, equal to {eq}6.0221409 \times 10^{23} {/eq}. Mole:A mole is Avogadro's number of atoms or molecules or particles. ...
How many atoms are in the formula Na 2 S 2 O 3 • 5 H 2 O? ( ) A. 很看五快型增放程备料写求力想间很看五快型增放程备料写求力想间12很看五快型增放程备料写求力想间很看五快型增放程备料写求力想间 B. 证写她内去容片意放成性证写她内去容片意放成性29证写她内去容片意放...
How to Find Chemical Formulae from a Mole Ratio: Example {eq}1 {/eq} Determine the chemical formula for hydrogen peroxide which has a mole ratio of {eq}2 {/eq} Hydrogen atoms for {eq}2 {/eq} Oxygen atoms. Step 1:Identify the Mole Ratio of the given compound. ...
What is the average atomic mass of Element X if 51.83% of Element X occurring in nature has a mass of 106.905 amu and 48.17% of the atoms have a mass of 108.905 amu? If the elements of the periodic table were sequenced by density from smallest to largest, what would th...
To learn more about the kinds and proportions of atoms in a substance in its simplest form, review the corresponding lesson Calculating Percent Composition and Determining Empirical Formulas. This lesson covers the following objectives: Describe the idea behind chemical formula Identify ...