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
PolarNik [594]
3 years ago
5

Atoms having the same atomic number but different atomic mass are called:

Chemistry
1 answer:
aleksandrvk [35]3 years ago
7 0
The answer is elements. Hope i could help.

You might be interested in
A minimumenergy of 7.21x10-19 J is required to produce the photoelectric effect in chromium metal.
forsale [732]

Answer:

<em>2.085 x 10^-20 J</em>

<em></em>

Explanation:

minimum energy required to produce photoelectric effect in chromium is given as hf =  7.21 x 10^-19 J

The work function of chromium Ф = 4.37 eV = 7.00151 x 10^-19 J

The minimum energy required to eject an electron from from a chromium metal E = ?

From E = hf - Ф

substituting values, we have

E = (7.21 x 10^-19) - (7.00151 x 10^-19)

E = <em>2.085 x 10^-20 J</em>

7 0
3 years ago
Which statement best explains the process occurring in step 4 of the life<br>cycle?​
Marat540 [252]

Answer:

Which statement best compares a eukaryote and a prokaryote?  

A. Eukaryotes have a cell wall, while prokaryotes have a cell membrane.

*B. Eukaryotes have membrane-bound organelles, while prokaryotes have few specialized  

structures.

C. Eukaryotes use active transport to move substances across the cell membrane, while  

prokaryotes use facilitated diffusion.

D. Eukaryotes use flagella to move themselves through substances, while prokaryotes are not  

able to move.

Explanation: its B

5 0
3 years ago
A mixture of gasoline and air explodes when it encounters a spark. This is
Aleksandr [31]

Answer:

<em>D. A combustion reaction</em>

Explanation:

7 0
3 years ago
blank is the energy required for a chemical reaction to take place, and blank is the energy associated with every substance.
Korolek [52]
Heat is the first one...and the secound one is kinetic

5 0
3 years ago
Read 2 more answers
A 25.0 g sample of an alloy was heated to 100.0 oC and dropped into a beaker containing 90 grams of water at 25.32 oC. The tempe
elena55 [62]

Answer:

The specific heat of the alloy C_{a} = 0.37 \frac{KJ}{Kg K}

Explanation:

Mass of an alloy m_{a} = 25 gm

Initial temperature T_{a} = 100°c = 373 K

Mass of water m_{w} = 90 gm

Initial temperature of water T_{w} = 25.32 °c = 298.32 K

Final temperature T_{f} = 27.18 °c = 300.18 K

From energy balance equation

Heat lost by alloy = Heat gain by water

m_{a} C_{a}  [T_{a} - T_{f}] = m_{w} C_w (T_{f} -T_{w} )

25 × C_{a} × ( 373 - 300.18 ) = 90 × 4.2 (300.18 - 298.32)

C_{a} = 0.37 \frac{KJ}{Kg K}

This is the specific heat of the alloy.

4 0
3 years ago
Other questions:
  • Theses are the questions please help
    14·1 answer
  • what are the similarities and differences between the gas properties and kinetic molecular theory postulates?
    13·1 answer
  • List a homogeneous material that is not a pure substance
    12·1 answer
  • What is the molality of impurities in thesolvent? If the impurity is largely hexachloroethane, C2Cl6, how many grams of this imp
    5·1 answer
  • Each of the given statements describes a type of column chromatography. Match the statements to the type of chromatography they
    8·1 answer
  • What is the answer ????​
    13·1 answer
  • A reaction is expected to produce 28.3 moles of hydrogen gas. If the hydrogen is collected at 297 K and 1.08 atm, what is the vo
    10·2 answers
  • What would be the mass, in grams, of 3.50 x 1025 molecules of chlorine?<br><br> Show your work
    5·1 answer
  • How many grams of Fe are needed to create 32.5mol Fe3O4?
    9·1 answer
  • water dissolves salts because it: select one: a. is hydrophobic, and salts are also hydrophobic. b. forms covalent bonds with th
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!