What is the unit of mass? A. newton B. meter C. kilogram D. second 相关知识点: 试题来源: 解析 C。质量的单位是千克(kilogram),A 选项 newton 是牛顿,是力的单位;B 选项 meter 是米,是长度的单位;D 选项 second 是秒,是时间的单位。
aYou write chines I write English ok 您写我写英国ok的脊椎[translate] aAudio tour 音频游览[translate] a谢谢你能开心 THANK YOU can be happy;[translate] aWhat is the number? 数字是多少?[translate]
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A. moles = mass × molar mass B. mass = moles × molar mass C. molar mass = moles × mass D. moles = mass + molar mass 相关知识点: 试题来源: 解析 B。本题考查物质的量、质量和摩尔质量的关系。物质的量等于质量除以摩尔质量,即 mass = moles × molar mass。选项 A、C、D 关系错误。
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Mass numbers are used to identify different isotopes of an element and are a count of the protons and neutrons found in that isotope's nucleus. Interestingly, the number of protons will remain constant, regardless of the isotope, but the number of neutrons will change. This is because an ...
The problem is that what is classified and perceived as a mass noun in English often functions as a countable noun in another language. A.问题是,在英语中被划为和被理解为物质名词的,在另外一种语言中往往被用作可数名词。B.问题是,作为被划为和理解为物质名词的英语名词,在另外一种语言里往往被用...
The mass number of an atom is the total number of protons and neutrons contained within the nucleus of the atom. The number of protons determines the element and will always equal the atomic number of that element. The number of neutrons can change and will determine which isotope of that...
What is the mass number for beryllium?Mass Number:A mass number is a total count of all the protons and neutrons in the nucleus of an atom. Protons are the positively charged particles in the nucleus while the neutrons have a neutral charge. Each particle has a mass count of one....
Mass is a measure of the amount of matter in an object. What is the SI unit of mass? A. gram B. kilogram C. pound D. ounce 相关知识点: 试题来源: 解析 B。A 选项 gram 克,不是国际单位制中的基本单位;C 选项 pound 磅和 D 选项 ounce 盎司都是英制单位;B 选项 kilogram 千克是国际...