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Chemistry, 22.08.2021 14:00 amohammad6

Identify 2 ways to measure mass

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Answer from: hasshh

Tools Used to Measure Mass

Tools Used to Measure MassBalances and Scales. For most everyday objects, scientists use a balance to obtain an object's mass. ...

Tools Used to Measure MassBalances and Scales. For most everyday objects, scientists use a balance to obtain an object's mass. ...Space Linear Acceleration Mass Measurement Device (SLAMMD) ...

Tools Used to Measure MassBalances and Scales. For most everyday objects, scientists use a balance to obtain an object's mass. ...Space Linear Acceleration Mass Measurement Device (SLAMMD) ...Measurement Transducer. ...

Tools Used to Measure MassBalances and Scales. For most everyday objects, scientists use a balance to obtain an object's mass. ...Space Linear Acceleration Mass Measurement Device (SLAMMD) ...Measurement Transducer. ...Vibrating Tube Mass Sensor. ...

Tools Used to Measure MassBalances and Scales. For most everyday objects, scientists use a balance to obtain an object's mass. ...Space Linear Acceleration Mass Measurement Device (SLAMMD) ...Measurement Transducer. ...Vibrating Tube Mass Sensor. ...Gravitational Interaction.

The basic SI unit for mass is the kilogram (kg), but smaller masses may be measured in grams (g). To measure mass, you would use a balance. In the lab, mass may be measured with a triple beam balance or an electronic balance, but the old-fashioned balance pictured below may give you a better idea of what mass is.

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Answer from: brenyasanders4001

The two ways to measure mass are subtraction and taring.

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Answer from: Quest

why is cellular respiration important for homeostasis?

it changes food into energy that the organism can use.

which of the following is most likely to happen if a cell is not able to divide?

the cell will not be replaced when it is damaged.

explanation:

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Answer from: Quest

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = $25^oc$ = 298 k $)0^oc=273kelvins$

$o_3+3no\rightarrow 3no_2,\delta h_{reaction}=? [/)</p><p>[tex]\delta h_{no}=90.4kj/mol$

$\delta h_{no_2}=33.85kj/mol$

$\delta h_{o_3}=142.2kj/mol$

$\delta h_{reaction}=\sum \delta h_{products}-\sum\delta h_{reactants}=3\times\delta h_{no_2}-(3\times \delta h_{no}+\delta h_{o_3})$

$\delta h_{reaction}=33.85-(90.4+142.2)=-311.85kj/mol$

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

$v_{no}=12.00 l,v_{o_3}=8.50 l$

$pv_{no}=n_{no}rt=1atm \times 12.00 l=n_{no}\times 0.0821 atml/k mol \times 298 k$

$n_{no}=0.49 moles$

$pv_{o_3}=n_{o_3}rt=1atm \times 8.50 l=n_{o_3}\times 0.0821 atml/k mol \times 298 k$

$n_{o_3}=0.34 moles$

according to reaction 3 moles no are reacting with 1 mol of $o_3$ ,then 0.49 mol of no will react with $\frac{1}{3}\times 0.49$ moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and $o_3$ is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :

$\delta h_{reaction}\times \text{moles of no}=-311.85kj/mol\times 0.49 mol=-152.80kj/mol$

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