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
Veseljchak [2.6K]
3 years ago
7

What are some global problems that material scientists are working to fix

Chemistry
1 answer:
a_sh-v [17]3 years ago
4 0
Global warming, the hole inside the atmosphere in Oklahoma , california .
You might be interested in
An object was measured by a worker as 35.6 cm long, however, the manufacturer specifications list the length of the object at 35
Anon25 [30]
The answer for this question is 1.71%
7 0
3 years ago
1. 90.0 mL of distilled water is added to a 10.0mL sample of 0.150mol/L sodium
aniked [119]

Answer: dilute

Explanation:

A concentrated solution which is used to prepare solutions of lower concentrations by diluting it with addition of water.

A dilute solution is one which contains lower concentration.

Using Molarity equation:

M_1 =concentration of stock solution = 0.150 mol/L

V_1 = volume of stock solution = 10.0 ml

M_2 = concentration of dilute solution = ?

V_2 = volume of dilute solution = (10.0+90.0) ml = 100.0 ml

0.150\times 10.0=M_2\times 100.0

M_2=0.015mol/L

As the concentration is less than the original concentration, the solution is termed as dilute.

7 0
3 years ago
The normal boiling point of iodomethane, CH3I, is 42.43 8C, and its vapor pressure at 0.00 8C is 140. Torr. Calculate (a) the st
tigry1 [53]

Answer:

a=28600J; b=90.6 J/K; c=402 torr

Explanation:

(a) considering the data given

 Vapour pressure P1 =0  at Temperature T1 = 42.43˚C,

Vapour pressure P2 = 273.15 at Temperature T2= 315.58 K)

Using the Clausius-Clapeyron Equation

ln (P2/P1) = (ΔH/R)(1/T2 - 1/T1)

In 760/140 = ΔH/8.314 J/mol/K  × (1/315.58K -- 1/273.15K)

ΔH vap= +28.6 kJ/mol or 28600J

(b) using the Equation ΔG°=ΔH° - TΔS to solve forΔS.

Since ΔG at boiling point is zero,

ΔS =(ΔH°vap/Τb)

 ΔS = 28600 J/315.58 K

= 90.6 J/K

(c) using ln (P2/P1) = (ΔH/R)(1/T2 - 1/T1)

ln P298 K/1 atm =  28600 J/8.314 J/mol/K × (1/298.15K - 1/315.58K)

P298 K = 0.529 atm

                = 402 torr

8 0
3 years ago
I'm just looking for someone to check my answers on this and correct me if I'm wrong :)
Llana [10]
I believe you are right
5 0
3 years ago
Read 2 more answers
Minerals are grouped according to their
tino4ka555 [31]

Answer:

chemical composition

3 0
3 years ago
Other questions:
  • In two or more complete sentences explain how to balance the chemical equation and classify its reaction type.
    5·1 answer
  • Can anyone help me for these 2 questions
    14·1 answer
  • What’s the formula for Lead(II) chlorite?
    5·1 answer
  • Please refer to photo, please hurry I’m being timed!!
    5·2 answers
  • Given the equation: __fecl2 + __na2co3 → __feco3 + __nacl when the equation is correctly balanced using the smallest whole numbe
    11·2 answers
  • Which element is correctly classified
    13·1 answer
  • 5. A sample of benzene (C6H6), weighing 7.05 g underwent combustion in a bomb calorimeter by the following reaction:
    9·1 answer
  • What is the total number of atoms in the molecule
    9·1 answer
  • Please help me this is my last question
    10·1 answer
  • Calculate the temperature at which air possess the density equal to that of hydrogen at 0%. Density of air at NTP is 14.4.​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!