The chemical formula of a chemical compound describes the components of the compound. It lists the number of each element making up the compound. These chemical formulas are also used to make chemical calculations. The Periodic Table:The periodic table is an organized chart that is comprised of ...
Oxygen is a gaseous chemical element vital to respiration. Although pure oxygen is used medicinally, it can be dangerous when...
What is the chemical ___ for oxygen? A. symbol B. stage C. step 相关知识点: 试题来源: 解析 【解析】【答案】A 【核心短语/词汇】symbol:符号 【翻译】氧气的化学物质符号是什么吗? 【解析】A.符号 B.阶段 C.步骤。根据句意”氧 气的化学 是什么吗”及选项可知,此处应填 入“符号”,故答案...
According to the Mayo Clinic, normal pulse oximeter readings usually range from 95 to 100 percent. Values under 90 percent are considered low, and indicate the need for supplemental oxygen. This condition is often referred to as hypoxemia, and its symptoms include severe shortness of breath, inc...
Is oxygen the only gas ___ helps fire burn?A that B / C which D what 相关知识点: 试题来源: 解析 A核心短语/词汇:help sb./ sth. (to) do sth. 帮助某人/某物做某事句子译文:氧气是唯一的助燃气体吗? 本题考查定语从句。___helps fire burn 用来修饰之前的名词gas, 该从句的引导词在定...
An oxygen deficit is a type of condition in which there is a shortage of oxygen in an organism. The causes of oxygen deficit...
An oxygen compressor is a device that forces oxygen gas into a pressurized cylinder. There are many different uses for an oxygen...
What is the formula for an ionic compound made of aluminum and oxygen? What is the formula for the compound formed from calcium and oxygen? What is the chemical formula for oxygen? What is the compound formula of sodium nitrate? What is the correct formula for sodium sulfate?...
8 A compound contains 34.5% calcium, 24.1% silicon and 41.4%oxygen by mass.What is its empirical formula?A$$ C a _ { 2 } S i O _ { 3 } $$ B$$ C a S i O _ { 3 } $$ C$$ C a S i _ { 2 } O _ { 3 } $$ D$$ C a S i O _ { 6 } $$ ...
What is the formula for an ionic compound made of carbon and oxygen? Calcium chloride contains only calcium and chlorine. What is the formula for this compound? What is the formula for calcium chlorate? What type of compound is calcium oxide?