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USPshnik [31]
3 years ago
12

HELP URGENT!

Chemistry
2 answers:
Tems11 [23]3 years ago
8 0

Answer:

Its A

Explanation:

B doesn't make sense because its the exact same process, it can't be easier

SCORPION-xisa [38]3 years ago
8 0
Answer: A

Explanation: B does not make sense. The amount of water doesn’t change the reaction. If water is under heat it will evaporate into a gas, if water is under cold temperatures it will begin to freeze into a solid. There is not a easier or harder way for water to evaporate or freeze.
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How many “p” orbital in principal energy level below?​
marshall27 [118]

Answer:

Each principal energy level above the first contains one s orbital and three p orbitals. A set of three p orbitals, called the p sublevel, can hold a maximum of six electrons. Therefore, the second level can contain a maximum of eight electrons - that is, two in the s orbital and 6 in the three p orbitals.

Explanation:

5 0
3 years ago
how many moles of sodium are needed to react with sulfuric acid to produce 3.75 moles of sodium sulfate according to the followi
anastassius [24]
Hello!
<span>
You'll need to react 7,5 moles of Sodium with sulfuric acid to produce 3.75 moles of sodium sulfate
</span>
First of all, you need to balance the reaction. The balanced reaction is shown below (ensuring that the Law of Conservation of Mass is met on both sides):

2Na + H₂SO₄ → Na₂SO₄ + H₂

Now, all that you have to do is to use molar equivalences in this reaction applying the coefficients to calculate the moles of Sodium that you'll need:

molesNa=3,75moles Na_{2} SO_4* \frac{2 moles Na}{1 mol Na_{2} SO_4} =7,5 moles Na 

Have a nice day!
5 0
3 years ago
Problem 19.24a Using the reagents below, list in order (by letter, no period) those necessary to convert the starting material i
Mariana [72]

Answer:

Step 1: The answer is option (b) NaOEt

Step 2: The answer is option (k) OH-, H2O, heat then H3O

Step 3: The answer is option (a) heat, -CO2

Step 4: na (no reagent)

Explanation:

See the attached file for the explanation.

3 0
4 years ago
One day, you decide to pop some popcorn. You put the bag in the microwave, but after a couple of minutes of cooking it is clear
nikdorinn [45]
Maybe its not real popcorn
6 0
4 years ago
How many grams of Ca metal are produced by the electrolysis of molten CaBr2 using a current of 10.0 amp for 2.44 hour??​
steposvetlana [31]

Answer:

17.95 g

Explanation:

The electrolysis of CaBr₂ → Ca²⁺  + 2Br⁻

Ca₂⁺ + 2e⁻ → Ca

Recall that:

Charge (Q) = current (I) × time (t)

Q = 10.0 × 2.4 × 3600

Q = 86400 C

Number of moles of electron = \dfrac{charge \  Q}{faraday's \ constant}

=\dfrac{86400}{96485} \\ \\ =0.8955 \ mol

No of moles of Ca = \dfrac{1}{2} \times 0.8955

= 0.44775  moles

Mass of Ca = no of moles × molar mass of Ca

= 0.44775  mol × 40.08 g/mol

= 17.95 g

8 0
3 years ago
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