1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
statuscvo [17]
3 years ago
8

USE LETTERS FOR ANSWERS, NO NEED TO EXPLAIN

Chemistry
1 answer:
Deffense [45]3 years ago
6 0

Answer:

Ok:

Explanation:

6a) Hg + Zn(NO_3)_2\\

b) NR

c) Hg_{(l)} + Zn(NO_3)_2 {(aq)}=> NR

d) Welp, no reaction so i don't know.

7a) KI + Pb(NO_3)_2

b) PbI_2 + KNO_3

c) All are aqeuous except for PbI2 which is solid

d) 2KI _{(aq)}+ Pb(NO_3)_2_{(aq)} => PbI_2_{(s)} + 2KNO_3_{(aq)}

Check if that is ok or if my work has any issues :).

You might be interested in
PO3−4 what's the formula name?
masha68 [24]

Answer:

Phosphate ion

Explanation:

4 0
3 years ago
How do I solve the following word problem: The half-life of Phosphorus - 32 is 14.3 days. It is used to study a plant's use of f
BaLLatris [955]

Half life is the time that it takes for half of the original value of some amount of a radioactive element to decay.

We have the following equation representing the half-life decay:

A=A_o\times2^{(-\frac{t}{t_{half}})_{}_{}}

A is the resulting amount after t time

Ao is the initial amount = 50 mg

t= Elapsed time

t half is the half-life of the substance = 14.3 days

We replace the know values into the equation to have an exponential decay function for a 50mg sample

A=\text{ 50 }\times2^{\frac{-t}{14.3}}

That would be the answer for a)

To know the P-32 remaining after 84 days we have to replace this value in the equation:

\begin{gathered} A=\text{ 50 }\times2^{\frac{-84}{14.3}} \\ A=0.85\text{ mg} \end{gathered}

So, after 84 days the P-32 remaining will be 0.85 mg

4 0
1 year ago
PLEASE HELP QUICK I WILL GIVE BRAINLIEST
Dvinal [7]

Answer:

3.00 moles Mg

Explanation:

4 0
3 years ago
To understand the relation between the strength of an acid or a base and its pKa and pKb values. The degree to which a weak acid
elena-14-01-66 [18.8K]

Answer:

pKa = 3.675

Explanation:

  • pKa = - Log Ka

∴ <em>C</em> X-281 = 0.079 M

∴ pH = 2.40

let X-281 a weak acid ( HA ):

∴ HA ↔ H+ + A-

⇒ Ka = [H+] * [A-] / [HA]

mass balance:

⇒<em> C</em> HA = 0.079 M = [HA] + [A-]

⇒ [HA] = 0.079 - [A-]

charge balance:

⇒ [H+] = [A-] + [OH-]... [OH-] is negligible; it comes from to water

⇒ [H+] = [A-]

∴ pH = - log [H+] = 2.40

⇒ [H+] = 3.981 E-3 M

replacing in Ka:

⇒ Ka = [H+]² / ( 0.079 - [H+] )

⇒ Ka = ( 3.981 E-3 )² / ( 0.079 - 3.981 E-3 )

⇒ Ka = 2.113 E-4

⇒ pKa = - Log ( 2.113 E-4 )

⇒ pKa = 3.675

8 0
3 years ago
1) What type of star covers all brightness and temperatures?
Mrrafil [7]

Answer:

The answer to the 2nd question is C.giants.

Explanation:

8 0
3 years ago
Other questions:
  • What element is primarily used in appliances to make electronic chips
    5·2 answers
  • A reading shows a pressure measurement of 43 in. Hg. What is the equivalent pressure in psi? A. 5.73 psi B. 2223.13 psi C. 26.32
    12·2 answers
  • For the following reaction if you have 13.2g of CO and 42.7g of Fe2O3, which is the limiting reagent with regards to the Fe prod
    14·1 answer
  • Water-soluble vitamins: a. often result in toxicities b. are easily excreted in the urine c. are stored in body tissues to a lar
    13·1 answer
  • A reaction mixture that consisted of 0.35 molH2and 1.6 mol I2 was introduced into a 2 L flask and heated. At the equilibrium, 60
    10·1 answer
  • What is the solvent in a sports drink that contains water, high fructose corn syrup, sodium chloride, and food coloring?
    8·1 answer
  • help please, How much water would you need to add to the 10 grams of sodium hydroxide to make 100 grams of the 10% solution?
    6·1 answer
  • When the Florida summer brings hot temperatures, what seasonal changes can be seen in plants?
    8·1 answer
  • 7) What is the speed of a jet plane<br> that flies 7200 km in 9.5 hours?
    10·1 answer
  • Why isn’t a state change from liquid to solid a chemical reaction?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!