3 years ago

(( ~ Please help me ~ ))

Chemistry

1 answer:

yuradex [85]3 years ago

8 0

Answer:

It contained five kingdoms instead of two

Explanation:

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Please answer truthfully:))

makvit [3.9K]

Answer:

Fast, Direction, Time

Explanation:

4 0

3 years ago

4. Imagine you have a radioactive sample containing both Virtualium and decayed atoms of Virtualium. After analysis, you find it

Romashka [77]

My sample would be 4000 years old because on my graph, I had about 9 Virtualium left at trial 4 so I am guessing that it would be 4000 years old.

7 0

3 years ago

One sound is loud and another is quieter. What must be different about these two sound waves?

tankabanditka [31]

Loudness of the sound depends on the "Amplitude" as loudness is different for two waves, their Amplitude must be different

In short, Your Answer would be "Amplitude"

Hope this helps!

3 0

3 years ago

A chemist measures the energy change ?H during the following reaction:

Leno4ka [110]

Answer:

(A) endothermic

(A) Yes, absorbed

Explanation:

Let's consider the following thermochemical equation.

2 Fe₂O₃(s) ⇒ 4 FeO(s) + O₂(g) ΔH = 560 kJ

Since ΔH > 0, the reaction is endothermic.

We can establish the following relations:

560 kJ are absorbed when 2 moles of Fe₂O₃ react.
The molar mass of Fe₂O₃ is 160 g/mol.

Suppose 66.6 g of Fe₂O₃ react. The heat absorbed is:

$66.6g.\frac{1mol}{160g} .\frac{560kJ}{2mol} =117kJ$

5 0

3 years ago

Type of Reaction<br> _Mg₃N2 →

nevsk [136]

Ionic reaction when a metal and non metal are together a molecule is when a metal abs metal react hope this helps

8 0

3 years ago