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3 years ago

Question 7

Chemistry

2 answers:

zavuch27 [327]3 years ago

8 0

Answer:

Explanation:

check if one element replaces another element in a compound

Svet_ta [14]3 years ago

7 0

Answer:

Check if the ions of two compounds exchange places.

Explanation:

The definition of single replacement is a reaction when an ion replaces another ion, thus the name.

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5. Which of the following elements will have a charge of 4+ or 4- as an ion?

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Answer:

The answer would either be Carbon or Silicon.

Explanation:

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2 years ago

Element X reacts with chlorine to form an ionic compound that has a formula of XCl2. To which group could element X belong?(1) G

kap26 [50]

Chlorine has a charge -1. It means that X is +2 so that the formula is XCl2. Group 2 is the correct answer.

7 0

3 years ago

Read 2 more answers

I’m so confused on this one!

stellarik [79]

The correct answer is 1) Ag, Si, I₂

Ag or silver is a metal. Silver is a transition element which lies in the d-block of the periodic table.

Si or silicon is a metalloid. Silicon is a metalloid which lies in the p-block of the periodic table.

I₂ or iodine is a nonmetal. Iodine is a halogen which lies in group 17 of the periodic table. All halogens are nonmetals.

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3 years ago

At 298 K, AHO = -1652 kJ/mol and ASO = 0.097 kJ/(K•mol). What is the Gibbs

Cloud [144]

Explanation:

here s the answer. Feel free to ask for more chem help

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3 years ago

The pKa of formic acid is 3.75. At pH of 5.00, _______ .

AlladinOne [14]

The pKa of formic acid is 3.75. At pH of 5.00, b) [formate] > [formic acid].

Formic acid is a weak acid. Thus, together with its conjugate base (formate) they form a buffer system. We can calculate the pH of a buffer system using Henderson-Hasselbach's equation.

$pH = pKa + log \frac{[formate]}{[formic\ acid]} \\\\5.00 = 3.75 + log \frac{[formate]}{[formic\ acid]}\\\\\frac{[formate]}{[formic\ acid]} = 17.8$

As expected, at a pH above the pKa, the concentration of formate is higher than that of the formic acid.

The pKa of formic acid is 3.75. At pH of 5.00, b) [formate] > [formic acid].

Learn more: brainly.com/question/22821585

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3 years ago