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
Olegator [25]
3 years ago
5

An element's atomic mass does not include the mass of its Electrons Protons Neutrons

Chemistry
1 answer:
klio [65]3 years ago
4 0
  Mass  of  electrons  are not  included when  calculating  the  atomic  mass  of   element.  Atomic  mass  of  the   element  is  equal  to   proton  +  neurons.  Example  the    the  mass  number  of  Nitrogen can   be  calculated as      7 protons  +  7  neutrons  to  give 14 .  thus  nitrogen  has  a  mass  number  of  14
You might be interested in
Choose the phrase that best describes h20
Kitty [74]
I need the answers or a picture to help
6 0
3 years ago
A sample of liquid mercury is heated from 20°C to 40°C. Which measurement of the sample will increase during this process? volum
Paladinen [302]

its volume this is the answer because the mercury will turn into gas. gas has more volume because it takes up more space as it spreads.

3 0
3 years ago
Treatment of phenol with excess aqueous bromine is actually more complicated than expected. A white precipitate forms rapidly, w
Anettt [7]

Answer:

Please see attachment

Explanation:

Please see attachment

8 0
3 years ago
Give the symbols for metalloids
Elina [12.6K]

Answer:

The metalloids; boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te), polonium (Po) and astatine (At) are the elements found along the step like line between metals and non-metals of the periodic table.

Elements: Germanium; Boron; Arsenic

Explanation:

6 0
3 years ago
A solution made by dissolving 33 mg of insulin in 6.5 mL of water has an osmotic pressure of 15.5 mmHg at 25°C. Calculate the mo
Liula [17]

<u>Answer:</u> The molar mass of the insulin is 6087.2 g/mol

<u>Explanation:</u>

To calculate the concentration of solute, we use the equation for osmotic pressure, which is:

\pi=iMRT

Or,

\pi=i\times \frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}\times RT

where,

\pi = osmotic pressure of the solution = 15.5 mmHg

i = Van't hoff factor = 1 (for non-electrolytes)

Mass of solute (insulin) = 33 mg = 0.033 g   (Conversion factor: 1 g = 1000 mg)

Volume of solution = 6.5 mL

R = Gas constant = 62.364\text{ L.mmHg }mol^{-1}K^{-1}

T = temperature of the solution = 25^oC=[273+25]=298K

Putting values in above equation, we get:

15.5mmHg=1\times \frac{0.033\times 1000}{\text{Molar mass of insulin}\times 6.5}\times 62.364\text{ L.mmHg }mol^{-1}K^{-1}\times 298K\\\\\text{molar mass of insulin}=\frac{1\times 0.033\times 1000\times 62.364\times 298}{15.5\times 6.5}=6087.2g/mol

Hence, the molar mass of the insulin is 6087.2 g/mol

8 0
3 years ago
Other questions:
  • Lewis diagrams of molecules of three different hydrocarbons are shown above. Which of the following claims about the molecules i
    13·1 answer
  • NEED HELP FAST
    15·2 answers
  • The name of CH3CH2CH2CH2CH2CONH2 is:<br> hexanamide<br> butanamide<br> pentanamide<br> O heptanamide
    7·1 answer
  • Identify the correct formula for Beryllium Phosphate.
    6·2 answers
  • What determines the amount of chemical energy a substance has. 6th grade level please
    12·1 answer
  • Copper is used for electrical wirin g and cooking pans however iron is much more common on earth than copper why might copper be
    6·1 answer
  • What benefits does sweet n low have
    12·1 answer
  • Question 8 (1 point)
    14·1 answer
  • In making a pizza, which process involves a chemical
    10·1 answer
  • An adult with the flu has a temperature of 102°F. Express your answer as an integer.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!