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galina1969 [7]
2 years ago
14

WILL GIV, BRAINLISE IS URGENT PLZZZ

Chemistry
2 answers:
Assoli18 [71]2 years ago
7 0

Explanation:

1: fluorine to form lithium fluoride

2:bcos covalent bond exists btw two non metals

3: bcos it is d combination of two or more elements nd elements r substances

4: for sbustances we hv flame test nd splint test

ionic compounds are held by strong electrostatic forces of attraction

Simora [160]2 years ago
3 0

Answer:

Ionic compounds are held together by strong electrostatic forces of attraction.

The element Fluorine would likely bond with Lithium and form an ionic compound. Fluorine-2,7

Lithium-2,1

Fluorine the electron acceptor would accept the valence electron from Li to form an octe config, while Li, the electron donor would lose the outer valence electron to attain duplet state.

Metals are good conductors of electricity because they possess metallic properties. But, covalent compounds are exhibited by non metals and are held together by weak forces and so does not possess these metallic properties.

Mixtures.

To study some characteristics of mixture and to know how it's different from a compound.

Carry out this experiment.

you're required to get Iron fillings, Powdered yellow sulphur, mixture of iron fillings and powdered sulphur, iron (ii) sulphide and record your observations.

-hold a magnet just above the substance.

-add dilute hydrochloric acid to the substance.

-add carbon (iv) sulphide to the substance.

At the end, you'll discover constituents of mixtures retain their physical properties. They are not bound together chemically and are separable by physical methods.

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What is the half-life in minutes of a compound if 75.0 percent of a given sample decomposes in 40.0 minutes? Assume first-order
yaroslaw [1]

Answer:

See below

Explanation:

.75 = 1/2^(40/h)      

log .75 / ( log 1/2) = 40 / h

<u>h = half life =   96.37683 min</u>

8 0
1 year ago
PLEASE ANSWER QUICK I WILL MARK BRAINLIEST A spreadsheet is a _____. A. way to organize data on a computer B. place to list obse
Oxana [17]

Answer:

The answer is D part of your lab notebook used for writing vocabulary

Hope it helps!

3 0
3 years ago
The arrows represent tge movement of which substances
11111nata11111 [884]
The arrows represent the movement of starting substances
6 0
3 years ago
Sugar dissolved completely in water to form a solution. The solution is a ?<br><br> pleasee help
aksik [14]

Answer:

the mixture or solution is called homogeneous mixture

4 0
3 years ago
he heat of fusion of tetrahydrofuran is . Calculate the change in entropy when of tetrahydrofuran melts at . Be sure your answer
lana [24]

Answer:

\Delta S=1.8x10^{-3}\frac{kJ}{K}=1.8\frac{J}{K}

Explanation:

Hello.

In this case, given the heat of fusion of THF to be 8.5 kJ/mol and freezing at -108.5 °C, for the required mass of 5.9 g, we can compute the entropy as:

\Delta S=\frac{n*\Delta H}{T}

Whereas n accounts for the moles which are computed below:

n=5.9g*\frac{1mol}{72g} =0.082mol

Thus, the entropy turns out:

\Delta S=\frac{0.0819mol*8.5 kJ/mol}{(-108.5+273.15)K}\\\\\Delta S=1.8x10^{-3}\frac{kJ}{K}=1.8\frac{J}{K}

Best regards.

3 0
3 years ago
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