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Gala2k [10]
3 years ago
12

How many moles of mercury (II) oxide are needed to produce 65.00 g of mercury?

Chemistry
1 answer:
natima [27]3 years ago
8 0

Answer:

the moles of mercury are nHg = 65/201

HgO --------> Hg + 1/2O2

65/201 65/201

=> the moles of HgO are 65/201 mol

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A chemical plant produces ammonia using the following reaction at a very high temperature and pressure. Which design issue is mo
Lorico [155]

Answer:

D. The equipment needed to accommodate the high temperature and pressure will be expensive to produce.​

Explanation:

Hello!

In this case, for the considered reaction, it is clear it is an exothermic reaction because it produces energy; and therefore, the higher the temperature the more reactants are yielded as the reverse reaction is favored. Moreover, since the effect of pressure is verified as favoring the side with fewer moles; in this case the products side (2 moles of ammonia).

In such a way, the high pressure favors the formation of ammonia whereas the high temperature the formation of hydrogen and nitrogen and therefore, option A is ruled out. Since the high pressure shifts the reaction rightwards and the high temperature leftwards, we would not be able to know whether the reaction has ended or not because it will be a "go and come back" process, that is why B is also discarded. Now, since hydrogen and nitrogen would be the "wastes", we discard C because they are not toxic. That is why the most accurate answer would be D. because it is actually true that such equipment is quite expensive.

Best regards!

6 0
3 years ago
Which of these best describes a scientific model?
goblinko [34]
The answer a way of explaining a complex concept.
3 0
3 years ago
How many nadh molecules are made from one molecule of acetyl coa going through the krebs cycle?
Mashcka [7]

Answer:

3 NADH molecules are made from each molecule of acetyl CoA through the Krebs Cycle.

Explanation:

First, 1 NADH is produced from each carbon lost from the 6-carbon citric acid (2 NADH total). Lastly, 1 additional NADH is made from the transformation of malate into oxaloacetic acid (acceptor molecule for acetyl CoA).

5 0
2 years ago
Drag the correct symbol to the equation. Not all symbols will be used. A plutonium atom undergoes nuclear fission. Identify the
Naya [18.7K]

Answer:

_{40}^{103}Zr

Explanation:

For any nuclear equation, we should utilize the law of mass conservation and the law of charge conservation. The sum of the masses on the left-hand side of the arrow should be equal to the sum of the masses on the right-hand side of the arrow (those are the superscripts for each nucleus). Similarly, the sums of charges should be equal (this is the law of charge conservation).

Let's say that the missing species is X with a mass of 'M' and charge of 'Z':

_{94}^{239}Pu+_0^1n\rightarrow _Z^MX+_{54}^{134}Xe+3_0^1n

Find mass applying the mass balance law:

239+1=M+134+3\cdot1\\240 = M+137\\M=240 -137\\M=103

This means our particle X has a mass of 103. Let's find the atomic number (the charge) same way:

94+0=Z+54+3\cdot0\\94=Z+54\\Z=94-54=40

The atomic number of our nucleus is 40. That said, we have:

_{40}^{103}X

Find the element in the periodic table with Z = 40. This is Zr. Meaning we can now identify it fully:

_{40}^{103}Zr

5 0
3 years ago
What are the characteristics of fluids
zvonat [6]

a substance that has no fixed shape and yields easily to external pressure; a gas or a liquid.

5 0
3 years ago
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