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Vilka [71]
3 years ago
14

Which of the following is not an amphoteric substance?

Chemistry
1 answer:
snow_lady [41]3 years ago
7 0

Sắt oxit

Explanation:

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Hydrogen gas(H2) has a molar mass of 2 g. Molar mass of a substance is defined as the mass of 1 mole of that substance. And by 1 mole it is meant a collection of 6.022*10^23 particles of that substance.

So number of moles of H2 are 0.5 in this case. And thus it means there are (6.022*10^23)*0.5 particles( here they are molecules) in 1g of H2.
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Which statement best describes the relationship between observations and conclusions? A. Observations are based on Conclusions B
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What is the change in density if a sample goes from 3.21 g/L to 5.43 g/mL?
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\Delta \rho =2.22 g/mL

Explanation:

Hello,

In this case, since a change in science is widely known to be considered as a subtraction between the the final and initial values of two measured variables and is represented via Δ, here the final density is 5.43 g/mL and the initial one was 3.21 g/mL, therefore, the change in density is:

\Delta \rho=\rho _f-\rho _i\\ \\\Delta \rho=5.43g/mL-3.21g/mL\\\\\Delta \rho =2.22 g/mL

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Consider the chemical equation in equilibrium.
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By increasing the P reaction moves toward less number of moles in this case 
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