<span>a) Table salt: it is a compound. A compound is a combination of atoms in fixed proportions.Table salt is NaCl, which means that table salt is a compound of 1 atom of Na and 1 atom of Cl and not other thing. b) Blood: is an homogeneous mixture: it is a mixture of many compounds which can not be easily distinguished or separated, you need microscopes or very special physical methods to distinguish or separate the different compounds of blood. d) Steel: it is a special king of homogeneous mixture (it is called an alloy) which, as in the case of blood, cannot be distinguished or separated easily. d) Planet earth: it is a heterogeneous mixture. You can easily distinguish many of the compounds of the planet Earth: water, oxygen, carbon,...</span><span />
The atomic number of an atom containing 29 protons, 29 electrons, and 34 neutrons is 29.
The atomic number of copper is 29, and it has a mass number of 63. The mass number is generally equal to the sum of the protons as well as neutrons within the nucleus, while the atomic number refers to the count of the nucleus's protons. This indicates that the nucleus of the copper atom contains 34 neutrons as well as 29 protons, for a total of 63 protons.
The charge number of such an atomic nucleus would be the chemical element's atomic number, also known as the nuclear charge number. This is equivalent to the proton number, or even the quantity of protons present in the nucleus of each atom of a particular element, for conventional nuclei.
Therefore, the atomic number of an atom containing 29 protons, 29 electrons, and 34 neutrons is 29.
To know more about atomic number
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Answer:- 5.91%
Solution:- The given balanced equation is:
![Na_2CO_3+ZnI_2\rightarrow 2NaI+ZnCO_3](https://tex.z-dn.net/?f=Na_2CO_3%2BZnI_2%5Crightarrow%202NaI%2BZnCO_3)
From given moles of zinc iodide we calculate the moles of zinc carbonate using mol ratio from the balanced equation and the moles are converted to grams on multiplying by molar mass.
![1.7molZnI_2(\frac{1molZnCO_3}{1molZnI_2})](https://tex.z-dn.net/?f=1.7molZnI_2%28%5Cfrac%7B1molZnCO_3%7D%7B1molZnI_2%7D%29)
= ![1.7molZnCO_3](https://tex.z-dn.net/?f=1.7molZnCO_3)
Molar mass of zinc carbonate is 125.38 gram per mol. Let's multiply the moles by molar mass to get the theoretical yield:
![1.7molZnCO_3(\frac{125.38g}{1mol})](https://tex.z-dn.net/?f=1.7molZnCO_3%28%5Cfrac%7B125.38g%7D%7B1mol%7D%29)
= ![213.15gZnCO_3](https://tex.z-dn.net/?f=213.15gZnCO_3)
theoretical yield is 213.15 g and the actual yield is given as 12.6 g.
percent yield = ![(\frac{actual}{theoretical})100](https://tex.z-dn.net/?f=%28%5Cfrac%7Bactual%7D%7Btheoretical%7D%29100)
percent yield = ![(\frac{12.6}{213.15})100](https://tex.z-dn.net/?f=%28%5Cfrac%7B12.6%7D%7B213.15%7D%29100)
= 5.91%
The percent yield of zinc carbonate is 5.91%.
Answer:
The answer is in the problem
Explanation:
As general rule of number of oxygen is -2:
O → -2
Alkali metals (Li, Na, K) are always +1
Na → +1
Alkali earth methals (Be, Mg, Ca...) are always +2
Ca → +2
The halogen group (F, Cl, Br...) is always -1
F → -1
The oxidation number of Si (+/- 4)
Aluminium is, usually +3
And to complete the octet rule in nitrogen, 3 electrons are required. That means:
N → -3
Answer:
The ratio of atoms of potassium to atoms of oxygen is 2:1
Explanation:
As the equation given is :
<h3>
![4K + O_2 -----> 2K_2O](https://tex.z-dn.net/?f=4K%20%2B%20O_2%20%20-----%3E%20%202K_2O)
</h3>
The product formed is 2 moles of potassium oxide .
Amount of potassium atom in the potassium oxide is 2 atoms of potassium and amount of oxygen atom present here is 1 atom of oxygen .
But we have 2 moles of potassium oxide . So, the potassium and oxygen atoms will be multiplied by 2 .
Hence , we get 4 atoms of potassium and 2 atoms of oxygen .
Ratio of potassium to oxygen atoms is - 4:2
Therefore , 2:1