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
marusya05 [52]
4 years ago
15

#1: Karen measures the volume of a gas at 200 K and 100 kPa. To correct her measurement to standard temperature and pressure (ST

P), what must she do?
A. make a volume correction based on a higher pressure of 200 kPa

B. make a volume correction based on a higher temperature of 273 K

C. make a volume correction based on a lower pressure of 50 kPa

D. make a volume correction based on a lower temperature of 73 K

**my answer: B

is that right?,
Chemistry
1 answer:
Nitella [24]4 years ago
3 0
To correct her measurement to standard temperature and pressure (STP), she must <span>make a volume correction based on a higher temperature of 273 K. The answer is letter B. This is in order to correct the temperature and pressure because correcting the volume will indicate that the temperature and pressure will result to the opposite result of the volume. This is because volume is indirectly proportional with pressure and temperature.</span>
You might be interested in
Use the successive ionization energies for this unknown element to identify the family it belongs to.
NNADVOKAT [17]

Answer: Belongs to the group 2A

Explanation:

As you can see, the first two ionization energies are close and low, meaning that this element ionizates easily.

Not only loses easily the first electron, but the second too

To remove the third electron you requiered a huge amount of energy

Now, elements easily ionizable are the ones from group IA, group 2A and transition metals.

The last ones have mixed characteristics in matter of how many electrons you can remove from them, so they are not a family.

Now the question: group I or group II ?

The elements of group I have low  ionization energies  for the first electron but high energies for the second ones.

Being all that said, the unknown element belongs to the Group 2A

4 0
3 years ago
Naturally occurring boron has an atomic weight of 10.811. Its principal isotopes are 10B and 11B. Part A What is the abundance (
Darya [45]

Answer:

10B has 18.9%

11B has 81.1%

Explanation:Please see attachment for explanation

4 0
3 years ago
The radioactive isotope used in the dating of fossils thought to be less than 40,000 years old is ________________.
Fantom [35]

Answer:

The answer is Radiocarbon

8 0
3 years ago
Plz help me i have to give this by today pls...........
vfiekz [6]
I need a a picture or the question
7 0
3 years ago
The elemental analysis of an organic solid extracted from gum arabic (a gummy substance used in adhesives, inks, and pharmaceuti
Evgesh-ka [11]

Answer:

The molar mass of the organic solid is 120.16 g/mol.

The molecular formula of an organic solid is C_4H_8O_4

Explanation:

Let the molecular mass of an organic solid be C_xH_yO_z

\Delta T_b=K_b\times m

Delta T_b=K_b\times \frac{\text{Mass of solid}}{\text{Molar mass of solid}\times \text{Mass of diphenyl  in Kg}}

where,

\Delta T_f =Elevation in boiling point = =1.5^oC

Mass of organic solid= 0.561 g

Mass of diphenyl = 24.9 g = 0.0249 kg (1 kg = 1000 g)

K_b = boiling point constant = 8.00 °C/m

m = molality

Now put all the given values in this formula, we get

1.5^oC=8.00 ^oC/m\times \frac{0.561 g}{\text{Molar mass of solid}\times 0.0249 kg}

{\text{Molar mass of solid}}=120.16 g/mol

\%=\frac{\text{Number of atoms}\times \text{mass of an atom}}{\text{molas mass of compound}}\times 100

Percentage of carbon in an organic solid = 40.0%

40\%=\frac{x\times 12 g/mol}{120.16 g/mol}\times 100

x = 4.0

Percentage of hydrogen in an organic solid = 6.7%

6.7\%=\frac{y\times 1 g/mol}{120.16 g/mol}\times 100

y = 8.0  

Percentage of hydrogen in an organic solid = 6.7%

53.3\%=\frac{x\times 12 g/mol}{120.16 g/mol}\times 100

y = 4.0

The molecular formula of an organic solid is C_4H_8O_4

8 0
3 years ago
Other questions:
  • A chemist must prepare of nitric acid solution with a pH of at . He will do this in three steps: Fill a volumetric flask about h
    8·1 answer
  • A binary compound created by reaction of nitrogen and an unknown element E contains 30.46% N and 69.54% E by mass. If the formul
    13·1 answer
  • the density of gold is 19.3 g/cm the density of iron pyrite is 5.0 g/cm . if a nugget of iron pyrite and a nugget of gold each h
    15·1 answer
  • What is process of bringing water to boiling affects
    6·1 answer
  • I don't know the answer to this question and I need help to figure it out. Thank you for helping!
    15·1 answer
  • Question
    10·1 answer
  • What makes a nucleus stable?
    5·2 answers
  • What other adaptations should zebras have? <br><br> Give me ideas please
    12·1 answer
  • Use the image to answer the question.
    5·2 answers
  • How far will a rocket travel in 5s if it is moving 80m/s?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!