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kykrilka [37]
3 years ago
13

8) When two atoms form a chemical bond_________.

Chemistry
1 answer:
Alexxandr [17]3 years ago
4 0

Answer:

The electrons of an atom that can participate in the formation of chemical bonds with other atoms.

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A student performs the reduction of 4-nitrobenzaldehyde (151.12 g/mol) with sodium borohydride (37.83 g/mol) in the presence of
Leviafan [203]

Answer:

65.4%

Explanation:

The redox reaction is a 1:1:1 reaction because the reagents suffer a double displacement reaction, and the substance that is substituted have the same charge (H+ and Br-), thus, we first need to know which of the reagents is the limiting.

Let's test the 4-nitrobenzaldehyde as the limiting. The mass needed for sodium borohydride (m) is the mass given of 4-nitrobenzaldehyde multiplied by the stoichiometric mass of sodium borohydride divided by the stoichiometric mass of 4-nitrobenzaldehyde. The stoichiometric mass is the number of moles in the stoichiometric representation (1:1:1) multiplied by the molar mass, so:

m = (4.13 * 37.83*1)/(151.12*1)

m = 1.034 g

So, the mass needed of the other reagent is larger than the mass that was given, so, it will be the limiting, and the stoichiometric calculus must be done with it.

The mass of the product that was expected is then:

m = (0.700*153.14*1)/(37.83*1)

m = 2.83 g

The percent yield is the mass that was formed divided by the expected mass, and then multiplied by 100%:

%yield = (1.85/2.83)*100%

%yield = 65.4%

8 0
3 years ago
A flashlight has a resistance of 2.4 . What voltage is applied by the batteries if the current in the circuit is
hammer [34]

Answer : The voltage applied by the batteries is, 6.0 V

Solution : Given,

Resistance of flashlight = 2.4 ohm

Current in the circuit = 2.5 Ampere

Formula used :

V=IR

where,

V = applied voltage

I = current in the circuit

R = resistance of light

Now put all the given values in the above formula, we get

V=(2.5A)\times (2.4ohm)=6volt=6V

Therefore, the voltage applied by the batteries is, 6.0 V

6 0
3 years ago
Read 2 more answers
How are radio waves transmitted
kotegsom [21]
Attractive antennas that pull the waves tword it.
7 0
3 years ago
Do you think naturally produced antimicrobial products like nisin and natamycin should replace sorbic acid for food preservation
saul85 [17]

Answer:

No.

Explanation:

change is often not rational.

7 0
4 years ago
Is copper penny react<br> reaction with Nitric<br> acid a<br> Chemical or physical<br> Change?
riadik2000 [5.3K]

Answer:

The reaction that occurs is a redox reaction. The Copper metal (Cu 0)on the copper pennies is oxidized in concentrated nitric acid to produce Cu2+ ions. Copper is easily oxidized to Cu2+, which is blue in aqueous solutions (water) so you should see the solution turn blue as the copper penny reacts.

Have a nice day ;)(^-^)

8 0
3 years ago
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