A. Chalk is made of calcium carbonate. B. Calcium carbonate is made from chalk. C. Chalk and calcium carbonate are the same. D. There is no relationship between chalk and calcium carbonate. 相关知识点: 试题来源: 解析 A。解析:粉笔是由碳酸钙做成的,选项 A 正确。选项 B 说法错误。选项 C...
When calcium carbonate decomposes, it forms calcium oxide and carbon dioxide. What is the balanced equation? A. CaCO₃ = CaO + CO₂ B. 2CaCO₃ = 2CaO + 2CO₂ C. CaCO₃ = 2CaO + CO₂ D. 2CaCO₃ = CaO + 2CO₂ ...
Calcium carbonate is the inorganic filler, and poor compatibility of polypropylene, so needs to be activated before use, to improve the adhesion of calcium carbonate and the polymer chains, improving the mechanical properties of polypropylene material. ...
When calcium carbonate is heated, it decomposes into calcium oxide and carbon dioxide. This is an example of a(n) ___ reaction. A. combination B. decomposition C. displacement D. double displacement 相关知识点: 试题来源: 解析 B。碳酸钙受热分解为氧化钙和二氧化碳,这是分解反应。A 选项是化合...
A. Calcium carbonate and hydrochloric acid react to give calcium chloride, water and carbon dioxide. B. Calcium carbonate combines with hydrochloric acid to produce calcium chloride, water and carbon dioxide. C. Calcium carbonate plus hydrochloric acid makes calcium chloride, water and carbon dioxide...
ai was happy to discover that this calcium was NOT calcium carbonate, which is the WORST kind of calcium to buy. It does nothing for your bones except make them worst. And that bad calcium is in sooo many products because its cheaper, but not this one! Childlife liquid calcium is great...
3 Calcium carbonate is insoluble in water. Sodium chloride is soluble in water.Which sequence of steps is used to obtain a pure, dry sample of calcium carbonate from a mixture of calcium carbonate and aqueous sodium chloride? D A filter→ dry the residue with filter paper → wash the ...
calcium carbonate is a kind of carbon dioxide?碳酸钙是二氧化碳的其中一种吗?碳酸钙是不是二氧化碳? 相关知识点: 身边的化学物质 我们周围的非金属—碳 碳的氧化物的性质 二氧化碳的实验室制法 实验室制取二氧化碳的原理及反应药品 试题来源: 解析 碳酸钙是一种二氧化碳这显然不对碳酸钙是一种碳酸盐二氧化碳也...
Sodium bicarbonate is probably one of the most common chemical substances found in homes. Very few kitchens are without it as it is a common ingredient in many recipes, such as breads and cakes, where it serves as a leavening agent.
Calcium carbide is a chemical compound that's commonly used to make the flammable gas acetylene. The basic chemical process for...