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
EleoNora [17]
2 years ago
12

Số oxi hóa của các nguyên tố: Fe(OH)2; Fe(OH)3; FexOy; Zn(OH)2 là gì

Chemistry
1 answer:
BARSIC [14]2 years ago
7 0

Answer:

esfsef

Explanation:

esfsefseF

You might be interested in
In which position are the earth, moon, and sun during a new moon?
RSB [31]

Answer:

They are in this position

4 0
3 years ago
If 50% of a radioactive element remains after 4000 years, what is the half-life?
ANTONII [103]

Hey there!

A half-life means after a certain amount of time, half of that substance will be gone/changed after that time.

If 50%, or half, of the element remains after 4000 years, that means the half life must be 4000 years.

Hope this helps!

4 0
3 years ago
An 8 N force is applied to a 2 kg object. What is the magnitude of the object's acceleration? A. 0.25 m/s² B. 4 m/s² C. 6 m/s² D
mel-nik [20]

Answer: 4m/s2 (B)

Explanation:

Force = mass × acceleration

Force given is 8N

Mass=2kg

Acceleration =?

Substitute into the formula

F=ma

8=2a

A=8/2

A=4m/s2

Acceleration used is 4m/s2 (B)

3 0
3 years ago
Read 2 more answers
A 100.0 mL sample of 0.300 M NaOH is mixed with a 100.0 mL sample of 0.300 M HNO3 in a coffee cup calorimeter. If both solutions
Mars2501 [29]

Answer:

Qm  = -55.8Kj/mole

Explanation:

NaOH(aq) + HNO₃(aq) => NaNO₃(aq) + H₂O(l)

Qm = (mc∆T)water /moles acid

Given => 100ml(0.300M) NaOH(aq) + 100ml(0.300M)HNO₃(aq)

=> 0.03mole NaOH(aq) + 0.03mole HNO₃(aq)

=> 0.03mole NaNO₃(aq) + 0.03mole H₂O(l)

ΔH⁰rxn = [(200ml)(1.00cal/g∙°C)(37 – 35)°C]water / 0.03mole HNO₃

= 13,333 cal/mole x 4.184J/cal = 55,787J/mol = 55.8Kj/mole (exothermic)*

Heat of reactions comes from formation of H-Oxy bonds on formation of water of reaction and heats the 200ml of solvent water from 35⁰C to 37⁰C.

4 0
3 years ago
Read 2 more answers
What kind of reaction is this?
dezoksy [38]

Answer:

que se yohdhdhdjdjudbdudbudbff

3 0
3 years ago
Other questions:
  • Which of the following is a unit for volume?<br> m3<br> km<br> cg<br> dkm
    8·2 answers
  • In a chemical reaction, the mass of the products ____.
    7·2 answers
  • How does matter change from solid,to a liquid, and to a gas?
    5·2 answers
  • In an experiment you are asked to react hydrochloric acid with sodium hydroxide. when measuring the volume of the reactants, whi
    5·2 answers
  • 1) Your nephew rides a kiddy train at the local carnival. The train, which has
    8·1 answer
  • The image compares the arrangement of electrons in two different neutral atoms.
    11·1 answer
  • Which of the following questions can be answered by science? (5 points)
    10·1 answer
  • Choose a body system and write about what kind of music it would listen to. write 2 sentences for full credit.
    12·2 answers
  • Are babies producers or consumers or none? What about rocks? Are they producers or consumers?
    15·1 answer
  • Discuss whether two products are required for a chemical reaction. (NEED HELP ASAP)
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!