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3 years ago

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The melting point of gallium metal is 29.76⁰C. If a piece of gallium is sliced into three parts, the melting point of each part

will be what A: higher than 29.76⁰C. B: 29.76⁰C. C: lower than 29.76⁰C

1 answer:

Ahat [919]3 years ago

7 0

Answer:

itd be B because the melting point is 29.76 no matter the size

Explanation:

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While doing a distillation, Farha heats the mixture too fast, and the temperature rises too quickly. If the mixture is composed

Brums [2.3K]

D as the two substances could have close boiling points, so if the temperature is not controlled well, both substances will evaporate.

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3 years ago

Read 2 more answers

RATE LAW QUESTION !

vivado [14]

In general, we have this rate law express.:

$\mathrm{Rate} = k \cdot [A]^x [B]^y$
we need to find x and y

ignore the given overall chemical reaction equation as we only preduct rate law from mechanism (not given to us).

then we go to compare two experiments in which only one concentration is changed

compare experiments 1 and 4 to find the effect of changing [B]
divide the larger [B] (experiment 4) by the smaller [B] (experiment 1) and call it Δ[B]

Δ[B]= 0.3 / 0.1 = 3

now divide experiment 4 by experient 1 for the given reaction rates, calling it ΔRate:

ΔRate = 1.7 × 10⁻⁵ / 5.5 × 10⁻⁶ = 34/11 = 3.090909...

solve for y in the equation $\Delta \mathrm{Rate} = \Delta [B]^y$

$3.09 = (3)^y \implies y \approx 1$

To this point, $\mathrm{Rate} = k \cdot [A]^x [B]^1$

do the same to find x.
choose two experiments in which only the concentration of B is unchanged:

Dividing experiment 3 by experiment 2:
Δ[A] = 0.4 / 0.2 = 2
ΔRate = 8.8 × 10⁻⁵ / 2.2 × 10⁻⁵ = 4

solve for x for $\Delta \mathrm{Rate} = \Delta [A]^x$

$4= (2)^x \implies x = 2$

the rate law is

Rate = k·[A]²[B]

6 0

3 years ago

Physical properties are those which can be measured or observed without changing the _______.

blsea [12.9K]

I’m not sure but I think the answer is substance . Because you can change the temperate of a substance but it will still be that substance . You can change all of these things except the substance itself

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3 years ago

PLEASE ANSWER ASAP ITS TIMED

Andrews [41]

The mole ratio Aluminium to Aluminum Oxide is 2 : 1

<h3>Further explanation</h3>

Given

Reaction

2Al + Fe ----> Al2O3 +2Fe

Required

The mol ratio

Solution

If we look at the reaction above, there is an element missing from the reactant i.e oxygen, because the number of atoms and elements involved in the reaction should be the same between the reactants and products.

So the possible and balanced reactions are:

<em>2Al(s) + Fe₂O₃ (s) → Al₂O₃ (s)+ 2Fe (s) </em>

From this reaction the ratio of Al: Al₂O₃ can be determined, which is 2: 1

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2 years ago

At 20 °C, a saturated aqueous solution of silver acetate, AgCH3CO2, contains 1.0 g of silver compound dissolved in 100.0 mL of s

tester [92]

Answer:

Ksp = 0.0036.

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to calculate the Ksp of the silver acetate, by knowing that its equilibrium expression is:

$Ksp=[Ag^+][CH_3COO^-]$

Next, we calculate molar concentration of the ions in the solution, the same to that of the acetate ions, due to the 1:1 mole ratio, as follows:

$[Ag^+]=[CH_3COO^-]=\frac{1.0g/(166.9122 g/mol)}{0.1000L} =0.0600M$

Therefore, the Ksp is:

$Ksp=0.0036$

Regards!

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3 years ago