3 years ago

Which molecule has polar bonds that do not cancel each other out?

Chemistry

2 answers:

kvv77 [185]3 years ago

5 0

Hello,

your answer would

A. Water

11Alexandr11 [23.1K]3 years ago

3 0

Hi there!

The correct answer will be A. Water. Due to electronegativity and stuff like that, the electrons spend more time around the oxygen side.

I hope this helps!
Brady

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(-5)+(+7)-(-4) + (+12) A 8 B 10 C 18 d 20

Vladimir79 [104]

Answer:

C-18

Explanation:

Step one follow order of operations

Add and subtract from left to right(-5)+(7)=2-(-4)+(12)

STEP 2

Apply negative Rule -(-4)=+4=2+4+(12)

then add 2+4+12=18

5 0

2 years ago

A steam engine (assume a Carnot engine ) has an efficiency of 50.8%. If the waste heat has a temperature of 72.4 ◦C, what is the

Inessa05 [86]

Answer:

The temperature of the boiler is approximately 147.1 °C

Explanation:

A Carnot engine is an ideal engine that has the highest efficiency among all the engines because the second law of thermodynamics.That efficiency $\eta$ is:

$\eta=1-\frac{T_{c}}{T_{h}}$

with $T_{h}$ the temperature of the hot reservoir (the boiler temperature) and $T_{c}$ the temperature of the cold reservoir (the steam temperature). Solving for $T_{h}$ :