The formula for a compound composed of {eq}Ca^{2+} {/eq} and {eq}PO_4^{3-} {/eq} is: a) {eq}CaPO_4 {/eq} b) {eq}Ca_2(PO_4)_3 {/eq} c) {eq}Ca_3PO_4 {/eq} d) {eq}Ca_3(PO_4)_2 {/eq} Compound: A compound is...
___ represents a formula for a chemical compound.A) PB) HC) CD) H⏫O 相关知识点: 试题来源: 解析 D 化学化合物的分子式需由两种或以上的不同元素组成。 - **A) P**:磷元素的符号,为单质。 - **B) H**:氢元素的符号,为单质。 - **C) C**:碳元素的符号,为单质。 - **D) H...
What is the molecular formula for a compound that is 82.76% carbon, has a molecular mass of 58.1 g/mol, and is composed solely of carbon and hydrogen?Hydrocarbons:Compounds that ate composed solely of carbon and hydrogen ar...
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百度试题 结果1 题目 36 In the formula for the compound a$$ X C l _ { 4 } $$e, the X could represent(1)(1) C (3) Mg(2) H (4) Zn 相关知识点: 试题来源: 解析 (1) 反馈 收藏
A compound with the empirical formula CH2 has a molar mass of 70 g/mol. What is the molecular formula for this compound?Empirical Formula and Molecular Formula:The empirical formula of a compound is defined as the smallest ratio of all the partici...
结果1 题目 What is the empirical formula of a compound that is 64.8% C, 13.6% H, and 21.6% O by mass? A. C 4 HO 1 B. C 5 HO 2 C 8 H 20 O 2 D. C 5 H 14 O 1 E. C 4 H 10 O 1 相关知识点: 试题来源: 解析 E 反馈 收藏 ...
The invention relates to a compound of formula I or pharmaceutically acceptable salts thereof, wherein X is selected from a valence bond, CH, NH or O, Z is selected from CH or N, Y is selected from a valence bond or CH, R2 is a hydrogen and R1 is selected from QCOH or QCN, ...
The formula for the area of a rectangle is l X w. [=length times width] b chemistry : a series of letters, numbers, and symbols showing the chemicals that a compound is made of The formula for water is H2O. chemical formulas 3 [noncount] US : a liquid that usually contains ...
A compound has the empirical formulaC_yH_R Fel. A soution of 0.26 gof the compound in 112 g of berzene (C_{}H_{})bols at 80.26° C. The boling point of benzene is 80.10°C|and K_{6}is 2.53°C/molal.What is the molecular formula of the compound? I A)$$ C _ { 3 0 }...