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elena-s [515]
3 years ago
14

During all chemical reactions,mass energy, and charge are...

Chemistry
2 answers:
Natasha2012 [34]3 years ago
8 0

Answer:

3

Explanation:

According to law of conservation of mass energy and charge the mass energy and charge will remain conserved.

Mazyrski [523]3 years ago
7 0
I believe the answer would be 3( conserved)
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You burn a 15g jellybean to warm 50 mL of water, which increases the temperature of the water 25 °C. How many calories of heat a
Juli2301 [7.4K]

Answer:

Q = 375\,cal

Explanation:

The quantity of heat transfered from the jellybean to the water is:

Q = \rho\cdot V \cdot c\cdot \Delta T

Q = \left(1\,\frac{g}{cm^{3}}\right)\cdot (15\,cm^{3})\cdot \left(1\,\frac{cal}{g\cdot ^{\circ} C} \right)\cdot (25\,^{\circ}C )

Q = 375\,cal

7 0
3 years ago
Read 2 more answers
Explain each of the following observation the melting point of lithium is higher than that of potassium
lakkis [162]

Due to its small size, lithium has a high melting and boiling point.

<h3>Why does lithium have high melting and boiling point explain?</h3>

With only one valence electron to contribute to the metallic lattice, lithium and potassium are both alkali metals. We could infer that the metallic bonding is less strong between the electron cloud and the larger potassium cation than it is in the lithium structure. This means that because lithium creates a smaller cation, the electrostatic force in this situation should be greater also Lithium has high ionization energy and a high melting and boiling point because of its small size. As a result, its crystal structure has an extremely high binding energy.

<h3>Alkali metals</h3>

The chemical elements lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium make up the alkali metals (Fr). They make up group 1, which is located in the s-block of the periodic table, along with hydrogen.

Learn more about alkali metals here:-

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5 0
2 years ago
When the equation Ca(OH)2 + HBr → (products) is completed and balanced, one term in the equation will be
NISA [10]
<span>Answer for the given question is CaBr2. Although, the given equation requires balancing of by adding one more HBr and one more H2o in resultant. The given equation will product at least one CaBr2. Hence the answer for the given equation is Calcium bromide i.e. CaBr2.</span>
4 0
3 years ago
When Thomas Edison first sold electricity, he used zinc coulometers to measure charge consumption. (In a coulometer the cathode
IrinaK [193]

Answer:

The answer is "42537.93 \ C".

Explanation:

Molar mass : Z_n = 65.38 \ \frac{g}{mol}\\\\

\to Zn^{2+} + 2e^{-} = Zn\\\\

\therefore\\\\ \to 65.38 \ g \ of\  Z_n  \ require: \\\\ \to 2 \times 96500\  C\\\\\to 14.41 \ g\  require,\\\\ \to \frac{(14.41 \times 2 \times 96500)}{65.38} \ \frac{g}{mol} = 42537.93 \ C

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3 years ago
When the external pressure is 404 kPa what is the vapor pressure of water at its boiling point
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