3 years ago

The table below lists the properties of a metallic element.

Chemistry

2 answers:

prisoha [69]3 years ago

8 0

Group 12 but I’m guessing tbh

Misha Larkins [42]3 years ago

3 0

Answer:

Group 12

Explanation:

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2. How old are the oldest fossils? Oldest rocks?During what period were these found?<br> IT

Andre45 [30]

Answer:

Fossils: 3.5 billion. Rocks: 4.28 billion

they were found during Haden Eon

Explanation:

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3 years ago

A food web is a diagram that shows how different food chains connect. true or false

Lorico [155]

Answer:

true

Explanation:

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3 years ago

Sketch the structure of the nitrogen containing product that is formed when ethalymine reacts with water.

Igoryamba

Answer:

Here's what I get

Explanation:

Ethylamine has an N atom with a lone pair of electrons.

It can act as a Brønsted-Lowry base and accept a proton from water and become an ethylammonium ion.

The structure of the ion is shown below (there is a C atom at each of the four-way bond intersections).

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3 years ago

The limiting reactant is the chemical substance that determines the amount of product(s) that can ultimately be formed in a reac

Mariulka [41]

Explanation:

Al=10,o2=5

(Al10)2(o5)3

The answer is oxygen.

6 0

3 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 $T_{h}$ :

$T_{h}=\frac{-T_{c}}{\eta-1}=\frac{-72.4}{0.508-1}\approx147.1\,C$

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3 years ago