4 years ago

How many milligrams of sugar does the milk chocolate bar contain?

Chemistry

1 answer:

topjm [15]4 years ago

8 0

Answer:

18.00

Explanation:

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1. An electric power plant uses energy from burning coal to generate steam at 450 °C. The plant is cooled by 20 °C water

kap26 [50]

Answer:

Explanation:

Efficiency of the electric power plant is $e=1-\frac{T_{2}}{T_{1}}$

Here Temperature of hot source $T_{1} = 450^{o}C=450+273=723 K$

and Temperature of sink $T_{1} = 20^{o}C=20+273=293 K$

Hence the efficiency is $e=1-\frac{293}{723}=0.5947=59.47%$

Now another formula for thermal efficiency Is

$e_{therm}=\frac{Q_{1}-Q_{2}}{Q_{1}}=\frac{W}{Q_{1}}$

Here QI is the of heat taken from source 100 MJ ; Q2 of heat transferred to the sink (river) to be found

W is the of work done and W = QI -Q2

Hence From $e_{therm}=\frac{Q_{1}-Q_{2}}{Q_{1}}=\frac{W}{Q_{1}}$

$W=e(Q_{1})=(0.5947)(100)=59.47MJ$

Hence the of heat transferred to the river Is $Q_{2} -W = (100 -59.47=40.53$

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3 years ago

Organic compounds with two oh groups per molecule are called

mafiozo [28]

Glycol
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3 years ago

Someone help me please. It's due in 30 mins

max2010maxim [7]

Answer: permanent removal of hair by energy or heat

Explanation:

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3 years ago

Benefits of characteris<br>ing chemicals

yulyashka [42]

Answer:

There are many benefits to using chemical characterization, from reducing the testing burden, saving time and money for the manufacturer, and reducing the amount of animal testing required. From an ethical standpoint, the latter benefit can be especially attractive.

Explanation:

please mark my answer in brainlist

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3 years ago

Which element belongs to the p6-block of the periodic table?

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Noble gasses I think I could be wrong tho

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