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yanalaym [24]
4 years ago
5

What does the questions “how much?” and “how many?” have in common?

Chemistry
1 answer:
Pepsi [2]4 years ago
5 0
They both ask for an amount of something
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Damien filled a salt shaker with black pepper instead of table salt.Damien needs to sort the pepper grains from the salt particl
Vsevolod [243]
C. Add water to dissolve the salt
3 0
3 years ago
Can you guys help me explain these? I will mark brainliest to whoever answers it right oh and this is due tommorow so im rushing
Debora [2.8K]

Answer:

Conduction  

Conduction moves heat through direct sub-atomic crash. A region of more prominent dynamic energy will move nuclear power to a region with lower active energy. Higher-speed particles will crash into more slow speed particles. The more slow speed particles will increment in motor energy subsequently. Conduction is the most widely recognized type of warmth move and happens through actual contact. Models is place your hand against a window or spot metal into an open fire.  

The interaction of warmth conduction relies upon the accompanying components: temperature slope, cross-segment of the material, length of the movement was, and actual material properties. The temperature inclination is the actual amount that portrays the bearing and pace of warmth travel. Temperature stream will consistently happen from most sultry to coldest or, as expressed previously, higher to bring down active energy. Once there's warm harmony between the two temperature contrasts, the warm exchange stops.

Convection  

At the point when a liquid, like air or a fluid, is warmed and afterward ventures from the source, it conveys the nuclear power along. This sort of warmth move is called convection. The liquid over a hot surface grows, turns out to be less thick, and rises.

Radiation

Thermal radiation generates from the emission of electromagnetic waves. These waves carry the energy away from the emitting object. Radiation occurs through a vacuum or any transparent medium (either solid or fluid). Thermal radiation is the direct result of random movements of atoms and molecules in matter. Movement of the charged protons and electrons results in the emission of electromagnetic radiation.

7 0
3 years ago
A student is given 1.4583 g of pure CuO. To recover the Cu present in the compound, the dark powdery solid was dissolved in 15.0
Zigmanuir [339]

Answer:

0.4402 grams of Mg is needed to displace all of the copper (II) ions from the solution.

Explanation:

Moles of CuO = \frac{1.4583 g}{79.5 g/mol}=0.01834 mol

1 mole of CuO has 1 mole of Cu^{2+} ions, then 0.01834 molesof CuO will have 0.01834 moles of

Mg(s) + Cu^{2+}(aq)\rightarrow Cu(s) + Mg^{2+}(aq)

According to reaction , 1 mole of copper (II) ion reacts with 1 mole of magnesium solid .

Then 0.01834 moles of copper (II) ion will react with :

\frac{1}{1}\times 0.01834 mol=0.01834 mol of magnesium.

Mass of 0.01834 moles of magnesium :

0.01834 mol × 24 g/mol = 0.4402  g

0.4402 grams of Mg is needed to displace all of the copper (II) ions from the solution.

8 0
3 years ago
Please tell me the answers quickly. First person to answer will be marked brainlist
Dafna11 [192]
The answer should be 2.
8 0
3 years ago
Read 2 more answers
Fill in the coefficients that will balance the following reaction:<br> __H2+__O2 —&gt; __H₂O
jolli1 [7]

Answer:

2H2+1O2—>2H2O

Explanation:

2H2+1O2—>2H2O

8 0
2 years ago
Read 2 more answers
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