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2 years ago

What type of heat transfer do dryers use? Forced convection Forced radiation

Chemistry

2 answers:

kotykmax [81]2 years ago

7 0

Answer:I believe it forced convections

Explanation:convection is the circular motion that happens when warmer air or liquid makes something less dense.

krek1111 [17]2 years ago

6 0

Answer:

how y'all doinnn

Explanation:

byyeee

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The fact that HBO2, a reactive compound, was produced rather than the relatively inert B2O3 was a factor in the discontinuation

Reil [10]

Answer:

1027.62 g

Explanation:

For $B_2H_6$ :-

Mass of $B_2H_6$ = 296.1 g

Molar mass of $B_2H_6$ = 27.66 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Moles= \frac{296.1\ g}{27.66\ g/mol}$

$Moles\ of\ B_2H_6= 10.705\ mol$

From the balanced reaction:-

$B_2H_6(g) + 3 O2_{(l)}\rightarrow 2 HBO_2_{(g)}+ 2 H_2O_{(l)}$

1 mole of $B_2H_6$ react with 3 moles of oxygen

Thus,

10.705 mole of $B_2H_6$ react with 3*10.705 moles of oxygen

Moles of oxygen = 32.115 moles

Molar mass of oxygen gas = 31.998 g/mol

Mass = Moles * Molar mass = 32.115 * 31.998 g = 1027.62 g

8 0

3 years ago

If 27.3% of a sample of silver-112 decays in 1.52 hours, what is the half-life (in hours to 3 decimal places)?

ICE Princess25 [194]

Answer: The half life of the sample of silver-112 is 3.303 hours.

Explanation:

All radioactive decay processes undergoes first order reaction.

To calculate the rate constant for first order reaction, we use the integrated rate law equation for first order, which is:

$k=\frac{2.303}{t}\log \frac{[A_o]}{[A]}$

where,

k = rate constant = ?

t = time taken = 1.52 hrs

$[A_o]$ = Initial concentration of reactant = 100 g

[A] = Concentration of reactant left after time 't' = [100 - 27.3] = 72.7 g

Putting values in above equation, we get:

$k=\frac{2.303}{1.52hrs}\log \frac{100}{72.7}\\\\k= 0.2098hr^{-1}$

To calculate the half life period of first order reaction, we use the equation:

$t_{1/2}=\frac{0.693}{k}$

where,

$t_{1/2}$ = half life period of first order reaction = ?

k = rate constant = $0.2098hr^{-1}$

Putting values in above equation, we get:

$t_{1/2}=\frac{0.693}{0.2098hr^{-1}}\\\\t_{1/2}=3.303hrs$

Hence, the half life of the sample of silver-112 is 3.303 hours.

6 0

3 years ago

One difference between mixtures and pure substances is that

defon

Answer:

The mixture is made up of different atoms and pure substance is made up of same type of atom.

The main difference is that mixture can be separated into its component by physical mean while pure substances can not be separated by physical process

Explanation:

Mixture:

The properties of the mixture are not same and contains the properties of all those component present in it.

it is a combination of one or more Pure substances and can be separated by simple physical methods.
it have varying boiling and melting point

Examples are:

mixture of salt and sand
Salt water is mixture of water and NaCl and can be separated by physical mean.

Alloys: its a mixture of different metal
Air: mixture of gases

Pure Substance:

Pure substances are those made of same type of atoms all elements and compounds are pure substances.

it can not be separated by simple physical mean

it have very constant and consistent melting and boiling point

Examples are:

Water : contain only water molecule
All elements: all elements are pure substance made of same atoms
All compounds: can not be separated by physical mean.

8 0

3 years ago

Read 2 more answers

The amount of oxygen bound to hemoglobin _____.

Luba_88 [7]

The amount of oxygen bound to hemoglobin is 98.5%

7 0

3 years ago

Read 2 more answers

If a reaction is not spontaneous, what is true of the reaction?

Murrr4er [49]

Spontaneous = exothermic. If it is not spontaneous, it is endothermic. ΔG > 0, which means that the reaction uses energy instead of emitting it.

5 0

3 years ago