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Sonja [21]
3 years ago
7

Help please I’ll make you as brainlister 3

Chemistry
2 answers:
lord [1]3 years ago
5 0

Answer:

It doesn't look like any of them but the best answer is SI

Explanation:

GarryVolchara [31]3 years ago
4 0
Answer: C. Al (aluminum)
Explanation: it has 3 valence electrons :)
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Some chemical reactions can proceed in just one direction . True or False ?
ss7ja [257]
The answer is False. i think
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3 years ago
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In a solution there is usually more ____________than ___________ A) solute/solvent B) soluble/insoluble C) saturation/unsaturati
Elan Coil [88]

Answer:

I think the answer is option 3

5 0
3 years ago
14. A piece of titanium at 100.0°C was dropped into 50.0 g of water at 20.0°C. The final temperature of the system was 22.6°C. W
Gemiola [76]

Answer:

m_{Ti}=13.0g

Explanation:

Hello,

In this case, based on the given, we can infer that as titanium is hot and water cold, it cools down whereas the water is heated up, therefore, in terms of heat, we have that the heat lost by the titanium is gained by the water:

-Q_{Ti}=Q_{H_2O}

That in terms of mass, specific heat and temperatures is:

-m_{Ti}Cp_{Ti}(T_2-T_{Ti})=m_{H_2O}Cp_{H_2O}(T_2-T_{H_2O})

In such a way, for computing the mass of titanium, considering the heat capacity of water 4.18 J/g°C, we have:

m_{Ti}=\frac{m_{H_2O}Cp_{H_2O}(T_2-T_{H_2O})}{-Cp_{Ti}(T_2-T_{Ti})} \\\\m_{Ti}=\frac{50.0g*4.18\frac{J}{g\°C}(22.6-20.0)\°C}{-0.54\frac{J}{g\°C}*(22.6-100.0)\°C} \\\\m_{Ti}=13.0g

Regards.

8 0
3 years ago
2FeCl3 + MgO -&gt; Fe2O3 + 3MgCl2<br> Convert 3.00 moles of MgO to moles of Fe2O3
nikitadnepr [17]

71.8 g of iron (III) oxide (Fe₂O₃) were produced from 3 moles of magnesium oxide (MgO).

Explanation:

We have the following chemical reaction:

2 FeCl₃ + 3 MgO → Fe₂O₃ + 3 MgCl₂

We see from the chemical reaction that 3 moles of magnesium oxide (MgO) will produce 1 mole of iron (III) oxide (Fe₂O₃).

number of moles = mass / molar weight

mass = number of moles × molar weight

mass of Fe₂O₃ = 1 × 71.8 = 71.8 g

Learn more about:

number of moles

brainly.com/question/13981579

#learnwithBrainly

6 0
3 years ago
You need to heat a solid to a temperature of 250 Celsius. What would be the most appropriate type of glassware to use?
Andrei [34K]
<span>A crucible and cover </span>
3 0
3 years ago
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