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
True [87]
3 years ago
15

Two atoms With diferent mass number but the same atomic number are called​

Chemistry
1 answer:
USPshnik [31]3 years ago
5 0

Answer:

they are called isotopes

You might be interested in
Compute the number of grams(g) of lead in 22.5 moles of lead.
iogann1982 [59]

Answer:

4662 in grams

Explanation:

hope this helps :).

7 0
2 years ago
0.00121 mol to grams
Gwar [14]

Answer: I believe the answer you are looking for is 0.02180

7 0
3 years ago
Why is it better to conduct an experiment more than once?
lilavasa [31]

The first reason to repeat experiments is simply to verify results. Different science disciplines have different criteria for determining what good results are. Biological assays, for example must be done in at least triplicate to generate acceptable data. Science is built on the assumption that published experimental protocols are repeatable.


2)      The next reason to repeat experiments is to develop skills necessary to extend established methods and develop new experiments. “Practice make perfect” is true for the concert hall and the chemical laboratory.


3)      Refining experimental observations is another reason to repeat. Maybe you did not follow the progress of the reaction like you should have.


4)      Another reason to repeat experiments is to study and/or improve them in way. In the synthetic chemistry laboratory, for example, there is always a desire to improve the yield of a synthetic step. Will certain changes in the experimental conditions lead to a better yield? The only way to find out is to try it! The scientific method informs us that it is best to only make one change at a time.


5)  The final reason to repeat an extraction, chromatographic or synthetic protocol is to produce more of your target substance. This is sometimes referred to scale-up.

8 0
2 years ago
What mass of solute is contained in 25.4 ml of a 1.56 m potassium bromide solution?
mash [69]
Answer is: mass of <span>potassium bromide is 4.71 grams.
V(KBr) = 25.4 mL </span>÷ 1000 mL/L = 0.0254 L, volume of solution.
c(KBr) = 1.56 mol/L.
n(KBr) = c(KBr) · V(KBr).
n(KBr) = 1.56 mol/L  0.054 L.
n(KBr) = 0.0396 mol, amount of substance.
m(KBr) = n(KBr) · M(KBr).
m(KBr) = 0.0396 mol · 119 g/mol.
m(KBr) = 4.71 g.
M - molar mass.
3 0
2 years ago
Read 2 more answers
A 270.0 gram piece of copper is dropped into 300.0 grams of water 24.00 °C. If the final temperature of water is 42.00 °C, what
Papessa [141]

Answer:

257

Explanation:

Just finished the test

4 0
3 years ago
Other questions:
  • Help me, I don’t understand
    13·2 answers
  • NA + 1.82 x nA = 2.0 x 10^-2. How do you solve for nA?
    6·1 answer
  • What would the formula be for this model above?
    14·1 answer
  • How did buddhism spread to china?​
    7·1 answer
  • what is it called when a scientists personal opinion affects the way experimental results are reported?
    6·2 answers
  • 1‑Propanol ( P ∘ 1 = 20.9 Torr at 25 ∘ C ) and 2‑propanol ( P ∘ 2 = 45.2 Torr at 25 ∘ C ) form ideal solutions in all proportion
    6·2 answers
  • Look at pictures and help please
    15·1 answer
  • What is hydrogen ion concentration of an acid solution whose PH is 3.4?​
    5·1 answer
  • How much energy is released when 0.40 mol C6H6(g) completely reacts with oxygen.
    15·1 answer
  • How many grams of oxygen are required to react with 13.0 grams of octane (C8H18) in the combustion of octane in gasoline?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!