3 years ago

What is the last element in period 4?

Chemistry

1 answer:

Ne4ueva [31]3 years ago

6 0

Scandium (Sc).......hope this helps

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Question:

den301095 [7]

Answer: I think it’s 4

Explanation:

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3 years ago

Submit What is the solubility of Cd3(POA) 2 in water? (Ksp of Cd3(PO4)2 is 2.5 x 10-33) | 1 2 3 +/- . 0 x100

vesna_86 [32]

Answer: The solubility of $Cd_3(PO_4)_2$ in water is $1.18\times 10^{-7}mol/L$

Explanation:

The balanced equilibrium reaction for the ionization of cadmium phosphate follows:

$Cd_3(PO_4)_2\rightleftharpoons 3Cd^{2+}+2PO_4^{3-}$

3s 2s

The expression for solubility constant for this reaction will be:

$K_{sp}=[Cd^{2+}]^3[PO_4^{3-}]^2$

We are given:

$K_{sp}=2.5\times 10^{-33}$

Putting values in above equation, we get:

$2.5\times 10^{-33}=(3s)^3\times (2s)^2\\\\2.5\times 10^{-33}=108s^5\\\\s=1.18\times 10^{-7}mol/L$

Hence, the solubility of $Cd_3(PO_4)_2$ in water is $1.18\times 10^{-7}mol/L$

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3 years ago

Which of the following fits the definition of a mineral? a. oil, because it's a liquid, not a solid b. a lab-grown diamond, beca

SVEN [57.7K]

Answer: The answer is C

Explanation:the salt fits the definition of a mineral because it's a naturally occurring compound that has a definite composition and a crystalline structure. It has a crystalline structure because of its repeating pattern

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The maps above show a front as it moves east across the United States. Which of these describes the weather change that can be e

kobusy [5.1K]

It’s D,the cold will bring cooler temperatures.....:)

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3 years ago

What type of mirror could have resulted in the image of the giraffe above?

natka813 [3]

Answer:

A convex mirror

Explanation:

Good luck on the test m8!

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3 years ago