How could Avogadro and his colleagues determine the number of atoms in a given substance, or any quantitative property of a single atom, when the technology to observe individual atoms was not invented until the twentieth century? Pioneering scientists of the atom, such as ...
解析 CThe only correct answer is C (atoms in one mole of helium gas)A is incorrect because it is not a massB is incorrect because each oxygen molecule contain two atomsD is incorrect becaus each sodium chloride contain two ions 反馈 收藏 ...
What value is closest to the mass of the atom? What is a hemoglobin molecule? What is the mass number of radon? What is the atomic mass of calcium? What is the mass of carbon monoxide which contains 64g of oxygen? What is the molar mass of Al2 So4 3?
Why is atomic mass equal to molar mass? Molar mass isthe mass of one mole of a substance. Atomic mass is the mass of one individual unit of a substance. the atomic mass in amu of a substance is numerically equivalent to the mass in g of one mole of that substance. What is average ...
One mole of carbon atom weighs 12g, the number of atoms in it is equal to, ( Mass of carbon-12 is 1.9926×10−23g) A1.2×1023 B6.022×1022 C12×1022 D6.022×1023Submit Calculate the mass (in grams) of a single C−12 atom. A1.993×10−23g B2.875×10−23g C4.162×10−23...
1 mole of gas at STP is equal to ... L View Solution एसटीपी पर एक मोल गैस का आयतन होता है? View Solution Doubtnut is No.1 Study App and Learning App with Instant Video Solutions for NCERT Class 6, Class...
If one kilometer is equal to 0.6 miles, how many kilometers would you have traveled if you have traveled 42 miles? Answer and Explanation: Learn more about this topic: Arithmetic with Decimal Numbers from Chapter 3/ Lesson 3 55K Depending upon the ope...
1 mole of an atom conatins the number of atoms equal to Avogadro's number ({eq}N_A = 6.022 \times 10^{23} \ mol^{-1} {/eq}). The expression relating the number of moles and number of atoms is, {eq}Number \ of \ atoms = n \times N_A {/eq} (n is number of moles)...
This present definition of the mole implies a fixed carbon-12 molar mass M(12C) equal to 12 g/mol exactly and involves the use of another base unit: the kilogram. Therefore, the mass unit has to be defined prior to the mole unit. The definition proposed by Mills et al.4 and further...
Today, a mole isAvogadro's numberof particles, which is exactly 6.02214076×1023. For all practical purposes, the mass of one mole of a compound in grams is approximately equal to the mass of one molecule of the compound in daltons. ...