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Elan Coil [88]
3 years ago
14

2. What do you think a

Chemistry
2 answers:
Monica [59]3 years ago
3 0

Answer:

hey discover an

interesting pattern in the

world that no one else

has described, but they

cannot explain what is

causing the pattern?

Explanation:

In-s [12.5K]3 years ago
3 0

Explanation:

If they did not explain the new pattern that they see they will need a support by other scientists

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The correct number of significant figures and digits is 3
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what would be the observation when you dipp magnesium hydroxide in a blue litmus paper and a red litmus paper. also what would b
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Answer:

red litmus will turn blue

blue litmus will remain blue

Explanation:

magnesium hydroxide is a base therefore turns red litmus paper blue

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3 years ago
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When 2 moles of Na(s) react with H2O(l) to form NaOH(aq) and H2(g) according to the following equation, 369 kJ of energy are evo
enot [183]

Answer:

Exothermic

q = -8.03 kJ/g

Explanation:

<em>When 2 moles of Na(s) react with H₂O(l) to form NaOH(aq) and H₂(g) according to the following equation, 369 kJ of energy are evolved.</em>

The thermochemical equation is:

2 Na(s) + 2 H₂O(l) → 2 NaOH(aq) + H₂(g)    ΔH = -369 kJ

Since the energy is evolved, the reaction is exothermic, which is why the enthalpy of the reaction (ΔH) is negative.

The heat released (q) per gram of Na(s) is (molar mass 22.98 g/mol):

\frac{-369kJ}{2molNa} .\frac{1molNa}{22.98gNa} =-8.03kJ/g

4 0
3 years ago
Plutonium is a radioactive material, exposure to which is hazardous to human health, and is one of the few materials that can be
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Answer:

Because it emits alpha particles, plutonium is most dangerous when inhaled. When plutonium particles are inhaled, they lodge in the lung tissue. The alpha particles can kill lung cells, which causes scarring of the lungs, leading to further lung disease and cancer.

Explanation:

please brainlist :)

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What is causing the change in the dry ice and the water ice? Describe what is happening at the molecular level to the substances
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