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3 years ago

Burning gasoline as fuel for a car involves

Chemistry

2 answers:

Viktor [21]3 years ago

6 0

Answer:

B D E are the answers on ed

Nostrana [21]3 years ago

3 0

Thermal energy

mechanical energy

chemical energy

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Fernando places 50 mL of HCl in a 100 mL beaker and 50 mL of NaOH in a 100 mL beaker. he places them on a scale together and mea

olchik [2.2K]

Answer:

The correct options are:

B. The HCl is the solute.

D. The H₂O is the solvent.

E. This mixture conducts electricity.

Explanation:

For the preparation of the HCl solution, 10 mL of HCl and 40 mL of water were mixed.

The compound that is present in the solution in a smaller ratio is the solute and the other compount -present in higher ratio- is the solvent.

So, the solute is HCl and the solvent is water (H₂O). Furthermore, water is considered as an universal solvent (for most of the polar and ionic compounds). According to this, the following options are correct:

B. The HCl is the solute.

D. The H₂O is the solvent.

Then, a condition for a solution that is able to conduct electricity is the presence of ions in the solution. When HCl is dissolved in water, it dissociates in ions according to the following equilibrium:

HCl ⇔ H⁺ + Cl⁻

The ions H⁺ and Cl⁻ are electrically charged so the solution can conduct electricity. According to this, the following option is also correct:

E. This mixture conducts electricity.

7 0

3 years ago

how many liters of O2 are needed to produce 5.62 g of SO2 in the following reaction? 4FeS2+11O2 ->2Fe2O3+8SO2

Liula [17]

8moles of SO_2 need 11mol O_2

1mol need=11/8=1.4molO_2

Moles of sO_2

$\\ \rm\hookrightarrow \dfrac{5.62}{64}=0.1$

Moles of O_2

1.4(0.1)=0.14mol

We know

1mol at STP=22.4L
1.4mol=0.14(22.4)=3.13L O_2

5 0

3 years ago

How many moles of Au are in 312 g of Au?

Talja [164]

Answer:

1.583 moles

Explanation:

Rounded Atomic Mass of Au = 197 grams

$\frac{312}{197} =1.5837, 1.584$

7 0

3 years ago

Ca (ClO) 2 Spell out the full name of the compound.

antoniya [11.8K]

Calcium hypochlorite

5 0

4 years ago

Chegg All of the following compounds are soluble in water except ____ . KClO4 Ba(OH)2 KCl PbCl2 AgNO3

EastWind [94]

Answer:

The answer is " $PbCl_2$ "

Explanation:

The water solution of PbCl2 is poor. It also has 2 distinct dissolving properties. In cold water, this will not dissolve easily.It is water-insufficiently soluble. And that in cold water, it is indeed insoluble. That's why we know that all energy should be available for a solid to dissolve in the liquid to counteract that attractive force between the ions in the grid.

6 0

3 years ago