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Andrew [12]
3 years ago
14

Confused as to what this questions is asking

Chemistry
1 answer:
alexandr1967 [171]3 years ago
8 0
What is the total number of the element of 2 valence. How many elements does the 2 valence has. Hope this made sense.
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What mass of HBO2 is produced from the<br> combustion of 139.5 g of B2H6?<br> Answer in units of g.
aliina [53]

Answer:

m_{HBO_2}=441.8gHBO_2

Explanation:

Hello there!

In this case, since the combustion of B2H6 is:

B_2H_6+3O_2\rightarrow 2HBO_2+2H_2O

Thus, since there is 1:2 mole ratio between the reactant and product, the produced grams of the latter is:

m_{HBO_2}=139.5gB_2H_6*\frac{1molB_2H_6}{27.67gB_2H_6} *\frac{2molHBO_2}{1molB_2H_6} *\frac{43.82gHBO_2}{1molHBO_2}

m_{HBO_2}=441.8gHBO_2

Best regards!

5 0
2 years ago
Which term defines the distance from the focal point to either a lens or a mirror
nikklg [1K]
The focal length, like you said it's the distance between the FOCAL point and the mirror.


Hope this helps.... :)
3 0
2 years ago
How many protons does a nitrogen atom have?<br> 07<br> 0 14<br> 8<br> 05
VLD [36.1K]

Answer:

07.

Explanation:

8 0
2 years ago
Read 2 more answers
in which part of the plant does photosynthesis take place A. the roots B. The leaves C. the flowers?​
kondaur [170]

Answer:

B

Explanation:

3 0
3 years ago
Read 2 more answers
8. Calculate the number of moles of eachsubstance.a. 5.45 x 1026 particles of methane, CH4
Klio2033 [76]

<em>ANSWER</em>

The number of moles of methane is 905.32 moles

STEP-BY-STEP EXPLANATION:

Given information

The number of particles of methane = 5.45 x 10^26 particles

Let x represents the number of moles of methane

To calculate the number of moles, we will be using the below formula

\text{Number of particles = number of moles x Avogadro's constant}

Recall that, the Avogadro's constant is given as

6.02\cdot10^{23}\begin{gathered} 5.45\cdot10^{26}\text{ = x }\cdot\text{ 6.02 }\cdot10^{23} \\ \text{Divide both sides by 6.02 }\cdot10^{23} \\ x\text{ = }\frac{5.45\cdot10^{26}}{6.02\cdot10^{23}} \\ x\text{ = }\frac{5.45}{6.02}\cdot10^{26\text{ - 23}} \\ x\text{ = 0.9053 }\cdot10^3 \\ x\text{ = 905.32 moles} \end{gathered}

Therefore, the number of moles of methane is 905.32 moles

6 0
1 year ago
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