CHEMISTRY HIGH SCHOOL

Which of the following elements will likely form a negative ion in its ionic compounds?a. Li, lithium
c. Mg, magnesium
b. Al, aluminum
d. Cl, chlorine

Answers

Answer 1
Answer: It's (D), Cl, chlorine, the others can't form ions
Answer 2
Answer: c) Mg, magnesium is the answer

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what volume of a 0.716 m kbr solution is needed to provide 25.5 g of kbr? 35.7 ml 14.7 ml 299 ml 0.299 ml 153 ml
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What is electron configuration of sulfer?

Answers

Sulfur has 16 protons and 16 electrons.
The electronic configuration of Sulfur is:
2, 8, 6        =          16 

Which of the measurements below best agrees with the picture?A. 35.0 mL
B. 36.5 mL
C. 36.0 mL
D. 38.0 mL

Answers

B. 36.5 mL is the correct answer

Write the correct representation of an element x which consists of 15 electron and 16 neutron?

Answers

Answer: The correct representation of the element with 15 electrons and 16 neutrons is phosphorus (P).

Explanation:

Any substance that yields a hydrogen ion when placed in a water solution is called a(n) _____.acid
base
hydronium ion
hydroxide ion

Answers

Answer : Option A) Acid


Explanation : Any substance that yields a hydrogen ion when placed in a water solution is called an acid.


According to Arrhenius theory of Acids and Bases, Acids are those substances which on dissociation in solution generates H^(+) ions. Whereas a Base is a substance that dissociates in the solution to produce OH^(-) ions.

Answer:

the answer is acid.

Explanation:

What is the total number of valence electrons in an atom of sulfur in the ground state?A. 6
B. 8
C. 3
D. 4

Answers

I am not sure but I think it might be A) 6. Sorry if it is not correct because I am not good at chemistry, Hope this helped! :)
Sulfur is in group 6A. All the elements in the A group are how many electrons it has. Since sulfur is in 6A it has 6 electrons so it the answer is A) 6.

The rate law for a hypothetical reaction is rate = k [A]2. When the concentration is 0.10 moles/liter, the rate is 2.7 × 10-5 M*s-1. What is the value of k?

Answers

Answer:The value of rate constant is 2.7* 10^(-3) Ls^(-1) mol^(-1).

Explanation:

Concentration of [A]=0.10 mol/L

The rate of the reaction = 2.7* 10^(-5) M/s

Rate constant = k

The given rate law:

R=k[A]^2

2.7* 10^(-5) M/s=k* (0.10 mol/L)^2

k=(2.7* 10^(-5) mol/L s)/(0.10 mol/L* 0.10 mol/L)=2.7* 10^(-3) Ls^(-1) mol^(-1)

The value of rate constant is 2.7* 10^(-3) Ls^(-1) mol^(-1).

Given:

rate = k [A]2

concentration is 0.10 moles/liter

rate is 2.7 × 10-5 M*s-1

Required:

Value of k

Solution:

rate = k [A]2

2.7 × 10-5 M*s-1 = k (0.10 moles/liter)^2

k = 2.7 x 10^-3 liter per mole per second
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What is the final temperature of the solution formed when 1.52 g of NaOH is added to 35.5 g of water at 20.1 °C in a calorimeter? NaOH (s) → Na+ (aq) + OH– (aq) ∆H = -44.5 kJ/mol