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RoseWind [281]
4 years ago
12

chemist in South America claims to have discovered a new element with an atomic number of 34. An extremely rare element, it was

found in a sample recovered from the Andes Mountains. Unfortunately, he has used up all of the sample in his analysis.

Chemistry
1 answer:
Tasya [4]4 years ago
7 0

Answer:

the element he has discovered is called Selenium.

Explanation:

Selenium has an atomic number of 34

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I need help solving this!
zmey [24]

Answer: Moles of hydrogen required are 4.57 moles to make 146.6 grams of methane, CH_{4}.

Explanation:

Given: Mass of methane = 146.6 g

As moles is the mass of a substance divided by its molar mass. So, moles of methane (molar mass = 16.04 g/mol) are calculated as follows.

Moles = \frac{mass}{molar mass}\\= \frac{146.6 g}{16.04 g/mol}\\= 9.14 mol

The given reaction equation is as follows.

C + 2H_{2} \rightarrow CH_{4}

This shows that 2 moles of hydrogen gives 1 mole of methane. Hence, moles of hydrogen required to form 9.14 moles of methane is as follows.

Moles of H_{2} = \frac{9.14}{2}\\= 4.57 mol

Thus, we can conclude that moles of hydrogen required are 4.57 moles to make 146.6 grams of methane, CH_{4}.

5 0
3 years ago
Marcy is running in a race. Her body is changing into .
Blababa [14]

Answer:

Running changes your body by burning body fat and building muscles. Expect to lose fat at the top of your thighs, build stomach muscles of steal and a butt to die for the weight. ... Running increasing your strength and endurance plus interval training can boost your metabolism.

Explanation:

4 0
3 years ago
Which is true regarding the penetrating power of radiation?
11Alexandr11 [23.1K]

Gamma radiation have the most penetrating power. It can penetrate through human body, aluminum and other metals. It can be stopped by lead. Hence, the radioactive waste are stored in lead container for safety purposes. The beta ray has more penetrating power than the alpha but less than gamma. The beta radiations can be stopped by aluminum. The alpha radiations have least penetrating power and it can be stopped by human hands.

8 0
3 years ago
Can someone answer dis:
SVEN [57.7K]

Answer:

If we subtract the atomic number from the atomic mass: atomic mass - atomic number = number of protons + number of neutrons - number of protons. Thus we get the number of neutrons present in an atom when we subtract the atomic number from the atomic mass.

Explanation: hope this helps???

7 0
3 years ago
Read 2 more answers
What is Gallium Sulfide(Ga2S3).<br> Ionic or Covalent?
mrs_skeptik [129]
The answer is Covalent







6 0
3 years ago
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