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3 years ago

Molar mass is used in a conversion factor to calculate _ and uses the units of __.

Chemistry

1 answer:

inn [45]3 years ago

4 0

Answer:

The molar mass is used in a conversion factor to calculate the weight of one mole of a given compound and uses the units of grams / mole ____.

Explanation:

Se utilizan los pesos atómicos (Z) de cada componente para calcular la masa de 1 mol de compusto, ejemplo:

H20 (agua)

Masa molar H20 = (Peso atomico H) x 2 + Peso atomico 0 = 1, 007g x2 + 16g = 18 gramos / mol

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Calculate the angle of a=1°, b=1', c= 1" in radians.

kari74 [83]

Answer 1) a=1° = 0.01745329252 radians

Explanation : According to the conversion chart, to convert 1° this formula is used;

radians = degrees × π / 180°

while solving for, One degree which is equal 0.01745329252 radians:

1° = π/180° = 0.005555556π = 0.01745329252 rad

Answer 2) b = 1' = = 0.0002907 radians

Explanation : A minute of arc is π/10800 of radian; which is a measurement unit of angular which is equal to 1/60 of 1° degree.

So substituting the value of 1° as and on solving we get,

0.01745/60 = 0.0002907 radians.

A minute of arc is π/10800 of a radian.

Answer 3) C= 1'' = 4.8481 $X 10^{-6}$

Explanation - When calculating second of arc which is considered to be 1/60 of an arc minute, and 1/3600 of a degree;

So all these are inter-related units which can be calculated if any one value is given;

on solving we get, π/648000 (about 1/206265) of a radian = 4.8481 X $10^{-6}$

4 0

4 years ago

PLEASE HELP!

motikmotik

Answer:

lithosphere

Explanation:

its found in the earth :)))

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3 years ago

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Determine the heat of reaction (ΔHrxn) for the reduction of acetaldehyde (CH3CHO) to ethanol (C2H5OH) by using heat of formation

andrew11 [14]

Answer: The enthalpy of the reaction is coming out to be -111.6 kJ.

Explanation:

Enthalpy change is defined as the difference in enthalpies of all the product and the reactants each multiplied with their respective number of moles. It is represented as $\Delta H$

The equation used to calculate enthalpy change is of a reaction is:

$\Delta H_{rxn}=\sum [n\times \Delta H^o_f_{(product)}]-\sum [n\times \Delta H^o_f_{(reactant)}]$

The chemical equation for the reduction of acetaldehyde to ethanol follows:

$CH_3CHO(g)+H_2(g)\rightarrow CH_3CH_2OH(l)$

The equation for the enthalpy change of the above reaction is:

$\Delta H_{rxn}=[(1\times \Delta H^o_f_{(CH_3CH_2OH(l))})]-[(1\times \Delta H^o_f_{(CH_3CHO(g))})+(1\times \Delta H^o_f_{(H_2(g))})]$

We are given:

$\Delta H^o_f_{(CH_3CH_2OH(l))}=-277.6kJ/mol\\\Delta H^o_f_{(CH_3CHO(g))}=-166kJ/mol\\\Delta H^o_f_{(H_2(g))}=0kJ/mol$

Putting values in above equation, we get:

$\Delta H_{rxn}=[(1\times (-277.6))]-[(1\times (-166))+(1\times (0))]\\\\\Delta H_{rxn}=-111.6kJ$

Hence, the enthalpy of the reaction is coming out to be -111.6 kJ.

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3 years ago

How an air mattress supports the weight of a person lying on it

kari74 [83]

The pressure on the inside of the mattress from air particles matches the force applied from the body.

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3 years ago

Hydrogen fuel cells that operate at lower temperatures use more expensive platinum electrode catalysts.

mote1985 [20]

The correct answer is B) they operate at a higher efficiency. sorry hope the answers not to late :(

5 0

4 years ago

Read 2 more answers

Molar mass is used in a conversion factor to calculate ___ and uses the units of ____.

Molar mass is used in a conversion factor to calculate _ and uses the units of __.