3 years ago

Group I element are very active.give reason

Chemistry

1 answer:

RUDIKE [14]3 years ago

7 0

Answer:

wat

Explanation:

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Hi! I need some help with this pleaseeee!!

german

A) eventually they will be in thermal equilibrium

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3 years ago

Calculate how many valence electrons are in H2CO, N2, Cl2?

Ket [755]

In H2CO, C is bonded to H, H and O. Write down the valence electrons of each element. 2 H = 1x 2 = 2. C= 4 O = 6 Total 12

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3 years ago

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What might your life be like if Mr. Fleming didn't notice that the mold killed the bacteria?

Ad libitum [116K]

Answer:

probably kinda weird

Explanation:

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A buffer solution is composed of 7.50 mol of acid and 4.75 mol of the conjugate base. If the pKa of the acid is 4.90 , what is t

Mamont248 [21]

Answer:

The correct answer is: pH= 4.70

Explanation:

We use the Henderson-Hasselbach equation in order to calculate the pH of a buffer solution:

$pH= pKa + log \frac{ [conjugate base]}{[acid]}$

Given:

pKa= 4.90

[conjugate base]= 4.75 mol

[acid]= 7.50 mol

We calculate pH as follows:

pH = 4.90 + log (4.75 mol/7.50 mol) = 4.90 + (-0.20) = 4.70

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3 years ago

The cube has a mass of 72.9 g. What is its density in g/cm3? What substance is it?

sashaice [31]

If the cube is 3 cm on each side, then it has a volume of 27 cm^3 (3 x 3 x 3). Density is mass divided by volume, so its density is 72.9/27 = 2.7 g/cm^3.

Going by the density, the cube is made of Aluminium - density is a fairly unique quantity

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3 years ago

Group I element are very active.give reason​

Group I element are very active.give reason