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
natali 33 [55]
4 years ago
14

Helium is listed as a noble gas true or false

Chemistry
1 answer:
Nonamiya [84]4 years ago
5 0
True; Heilum is in Group 18 which are called “Noble Gases”
You might be interested in
Not sure how to do this
faust18 [17]

Answer:

0.0991 M

Explanation:

Step 1: Write the neutralization reaction between oxalic acid and sodium hydroxide.

H₂C₂O₄ + 2 NaOH = Na₂C₂O₄ + 2 H₂O

Step 2: Calculate the moles of oxalic acid

The molar mass of H₂C₂O₄ is 90.03 g/mol. The moles corresponding to 153 mg (0.153 g) are:

0.153g \times \frac{1mol}{90.03g} = 1.70 \times 10^{-3} mol

Step 3: Calculate the moles of sodium hydroxide

The molar ratio of H₂C₂O₄ to NaOH is 1:2.

1.70 \times 10^{-3} molH_2C_2O_4  \times \frac{2molNaOH}{1molH_2C_2O_4} = 3.40 \times 10^{-3} molNaOH

Step 4: Calculate the molarity of sodium hydroxide

\frac{3.40 \times 10^{-3} mol}{34.3 \times 10^{-3} L} = 0.0991 M

4 0
4 years ago
The average osmotic pressure of ocean water is 28 atm corresponding to a concentration of 0.50m solutes. what is the approximate
RideAnS [48]
Answer : 0.125 M

Explanation : The definition of osmotic pressure is "<span><em>the pressure can be applied on a pure solvent to prevent it passing into a given solution by osmosis</em>".
</span>
So according to this definition, osmotic pressure can be called as directly proportional to the concentration of the solution and hence the pressure can also be directly proportional to the concentration.

Hence, if pressure is getting decreased from 28 to 7 it means it got decreased by 4 times;
28 / 7 = 4 that means;

So the concentration will be also decreased by 4 times so, 0.50 / 4 = 0.125 M
6 0
4 years ago
the normal boiling point of ethanol is 78.3 and its molar heat of vaporization is 393. Calculate the vapor pressure of ethanol a
madam [21]

<u>0.12 atm</u><u> </u><u>vapor pressure</u><u> of ethanol at 45.0 C.</u>

What is vapor pressure in science definition?

  • Vapour pressure is a measure of the tendency of a material to change into the gaseous or vapour state, and it increases with temperature.
  • The temperature at which the vapour pressure at the surface of a liquid becomes equal to the pressure exerted by the surroundings is called the boiling point of the liquid.

We will use the Clausius-Clapeyron equation,

ln(P2/P1) = dHvap/R[1/T1-1/T2]

where,

P1 = unknown

P2 = 1 atm

T1 = 30 oC = 30 + 273 = 303 K

T2 = 78.3 oC = 78.3 + 273 = 351.3 K

dHvap = 39.3 kJ/mol = 39300 J/mol

R = 8.314 J/K.mol

Feed values,

ln(1/P1) = 39300/8.314[1/303 - 1/351.3]

P1 = 0.12 atm

thus, the vapor pressure at 30° C is 0.12 atm.

Learn more about vapor pressure

brainly.com/question/2510654

#SPJ4

8 0
2 years ago
When light waves pass through solids, the speed of the wave ___________.
bearhunter [10]

Answer:

i think that the answer is that it would decrease

Explanation:

hope this helps

sorry if the answer is wrong

8 0
3 years ago
How many moles are in 117.30 grams of KCLO3?
eduard

0.0081599680129254

Hope this helps?

5 0
3 years ago
Other questions:
  • What object is being acted on by balanced forces?
    6·1 answer
  • Which of the following would not cause an increase in the pressure inside a sealed container of neon gas?
    15·2 answers
  • The making of ice cubes is an endothermic reaction
    8·1 answer
  • Which general equation represents an endothermic reaction?
    12·2 answers
  • Identify the compound with the lowest dipole moment. Identify the compound with the lowest dipole moment. CH3CH2CH3 CH3OCH3 CH3C
    12·1 answer
  • How many molecules are in 4.92 moles of water?
    12·1 answer
  • How adaptations in a bird's beak help them survive in their environment
    5·2 answers
  • How do geologists monitor volcanoes?
    13·1 answer
  • A train travels 854 meters in 75 seconds. What is the speed of the train?
    7·1 answer
  • How many grams of chromium are needed to react with of cuso4 to produce 10.2g cu
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!