Answer:
the energy of the products is less than the energy of the reactants.
Explanation:
the the change is enthalpy is negative, and heat is released to the surroundings.
Answer:
The correct answer is - valid.
Explanation:
In this case, there is consistency in the results measures in the experiment which makes this method reliable. The consistency of a measure is referred to the reliability.
It is also given that the level of contamination of individual containers as per the average parameter of the contamination of large containers which makes this method not valid as the measurement method is how correctly it measures the true value of the parameter.
Thus, the correct answer is - method is reliable, but not valid.
■<em> </em><em>L</em><em>i</em><em>N</em><em>O</em><em>3</em><em> </em><em>=</em><em> </em><em>Lithium nitrate Inorganic compound with the formula LiNO₃. It is the lithium salt of nitric acid. It is obtained from the reaction of lithium carbonate or lithium hydroxide with nitric acid.</em>
■ <em>CaO</em><em> </em><em>=</em><em> </em><em>Calcium oxide (CaO) or quicklime is a kind of chemical compound with a wide range of uses.</em>
■ <em>C</em><em>2</em><em>N</em><em>2</em><em> </em><em>=</em><em> </em><em>Cyanogen is the chemical compound with the formula formula (CN). It is a colorless, toxic gas with a pungent odor. The molecule is a pseudohalogen. Cyanogen molecules consist of two CN groups - similar to diatomic halogen molecules such as Cl₂, but much less oxidizing</em><em>.</em>
■ <em>M</em><em>g</em><em>S</em><em>O</em><em>4</em><em> </em><em>=</em><em> </em><em>Magnesium sulfate is an inorganic salt (chemical compound) with the chemical formula MgSO4, containing magnesium, sulfur and oxygen.</em>
■ <em>Fe2O3 = Iron Oxide; It has compounds such as iron chromate (FeCrO4), Iron Phosphate (Fe2P), Iron Sulphide (FeS). Iron oxides in black iron oxide (FeO), red (Fe203) and black (Fe3O4) colors give beige, yellow, brown, red, black colors according to their additive ratios.</em>
■ <em>P3N5</em><em> </em><em>=</em><em> </em><em>Triphosphorus pentanitride is an inorganic compound with the chemical formula P formulaN₅. Containing only phosphorus and nitrogen, this material is classified as a binary nitride. No application has been developed for this material. It is a white solid, but samples often appear colored due to impurities.</em>
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<em><u>I hope I got it right, I'm trying to improve my English a little :)</u></em></h3>
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<em><u>I tried really hard, can you choose the best?</u></em></h3>
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<em><u>Greetings from Turkey</u></em><em><u>:</u></em><em><u>)</u></em></h2>
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<em><u>#XBadeX</u></em><em><u> </u></em></h2>
0.139 moles of plutonium are present in a sample containing 8.4 x 10²² atoms of Pt.
<h3>How to calculate number of moles?</h3>
The number of moles of a substance can be calculated using the following expression:
no of moles = no of molecules ÷ 6.02 × 10²³
According to this question, 8.4 × 10²² atoms of plutonium are present in the molecule of plutonium.
no of moles = 8.4 × 10²² = 6.02 × 10²³
no of moles = 1.39 × 10-¹
no of moles = 0.139moles
Therefore, 0.139 moles of plutonium are present in a sample containing 8.4 x 10²² atoms of Pt.
Learn more about no of moles at: brainly.com/question/14919968
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