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Nastasia [14]
3 years ago
6

What is the value of making an observtion during an investigation

Chemistry
1 answer:
prisoha [69]3 years ago
3 0

Answer:

it helps you gather imformation which makes it easier to crack a crime

Explanation:

i alr explained

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steposvetlana [31]

Answer:

1.

meteorology A line drawn on a map or chart connecting places of equal or constant pressure.

2.

nuclear physics Either of two nuclides of different elements having the same mass number.

3.

thermodynamics A set of points or conditions at constant pressure.

5 0
3 years ago
A chemist measures the energy change ?H during the following reaction: 2HgO (s) ?2Hg (l) +O2 (g) =?H182.kJ Use the information t
Elan Coil [88]

Answer:

A. endothermic.

A. Yes, absorbed.

Explanation:

Let's consider the following thermochemical equation.

2 HgO(s) ⇒ 2 Hg(l) + O₂(g)  ΔH = 182 kJ

The enthalpy of the reaction is positive (ΔH > 0), which means that the reaction is endothermic.

182 kJ are absorbed when 2 moles of HgO react (molar mass 216.59 g/mol). The heat absorbed when 72.8 g of HgO react is:

72.8g.\frac{1mol}{216.59g} .\frac{182kJ}{2mol} =30.6kJ/mol

6 0
3 years ago
What type of bond is sand
deff fn [24]

Answer:

Hello there! How are you doing today :] Sand would be a covalent bond.

Explanation:

Silica is one of the main compounds found in sand. It also contains many silicon and oxygen atoms. which; are joined together by covalent bonds in a regular arrangement, forming a giant covalent structure.

7 0
3 years ago
One group of scientists has proposed a new theory on Adaptation. A majority of scientists worldwide agree with the theory. The t
Reil [10]
The theory is most likely accurate and the main reason behind this process of thinking is because a majority of the scientists around the world agree with the theory. It can never be biased or incomplete. The correct option among all the options that are given in the question is the third option or option "C".
7 0
3 years ago
Read 2 more answers
Which equation shows how to solve for enthalpy of solution based on the information in tables?​
Tatiana [17]

Answer: B. triH sol Mgl2= -triHlat+ triHhydr Mg^2+ 2triHhydr^l-

Explanation:

Just did it and it was right

8 0
3 years ago
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