3 years ago

Plsss helppppppppp

Chemistry

1 answer:

Fantom [35]3 years ago

7 0

Number one: True Number 2: False because hot stars apear as blue-white and cool stars apear as red

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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!

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2 years ago

If the mass is 6.5g, and the volume is 25mL.. what is the density? PLEASE ANSWER ASAP

julia-pushkina [17]

Answer:

p = 260 kilogram/cubic meter

Explanation:

ρ = $\frac{m}{V} \\$

= $\frac{6.5 g}{25mL}$

= 0.26 gram/milliliter

= 260 kilogram/cubic meter

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3 years ago

Does changing the number of neutrons change the identity of the element you have built ?

worty [1.4K]

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If you change the number of neutrons somehow, nothing will happen because it carry's no charge at all.

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Select the correct answer from each drop-down menu. How are real gases different from ideal gases? Real gases differ from ideal

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They have a mass for the particles

There are no totally elastic collisions

There are intermolecular forces

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