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Vlad [161]
3 years ago
7

What is the proper name of HF

Chemistry
1 answer:
Anastasy [175]3 years ago
7 0

Answer:

Hydrogen Fluoride

Explanation:

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Students are designing an experiment to test the law of conservation of mass using the following materials: 10 g baking soda, 30
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Answer:

1. Students need to measure masses of the items.

2. Put baking soda and vinegar in a plastic bag and close it.

3. Mix the two, allowing for a reaction to occur.

4. Figure the mass of the plastic bag while the two components are inside.

5. The combined mass should be equal to what each weighed on their own.

Explanation:

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2 years ago
The enthalpy of combustion of naphthalene (MW = 128.17 g/mol) is -5139.6 kJ/mol. How much energy is produced by burning 0.8210 g
bazaltina [42]

The energy produced by burning : -32.92 kJ

<h3>Further explanation</h3>

Delta H reaction (ΔH) is the amount of heat change between the system and its environment

(ΔH) can be positive (endothermic = requires heat) or negative (exothermic = releasing heat)

The enthalpy and heat(energy) can be formulated :

\tt \Delta H=\dfrac{Q}{n}\rightarrow n=mol

The enthalpy of combustion of naphthalene (MW = 128.17 g/mol) is -5139.6 kJ/mol.

The energy released for 0.8210 g of naphthalene :

\tt Q=\Delta H\times n\\\\Q=-5139.6~kJ/mol\times \dfrac{0.8210~g}{128.17~g/mol}~\\\\Q=-32.92~kJ

3 0
2 years ago
i like this guy but i don't think he likes me back. he also goes to school somewhere else, but we see eachother every friday. he
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You should try to strt a conversation with him or say hi introduce yourself or ask him how hes doing just talk to him i guess

3 0
3 years ago
Read 2 more answers
Which physical state of nitrogen has the highest entropy? (1 point) solid liquid gas vapor?
Tju [1.3M]
Answer is. gas <span>has the highest entropy.
</span>Entropy is the measure of the molecular disorder<span> and it is system’s thermal </span>energy<span> per unit </span>temperature<span> that is unavailable for doing useful </span>work<span>. 
Nitrogen molecules have weakest intermolecular bonds in gas phase and move fast and without order. In solid state movement is much more less.
</span><span>

</span>
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3 years ago
How does heat move from one place to another on the troposphere
d1i1m1o1n [39]

I thinlk it's by radiation?......

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3 years ago
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