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
vovikov84 [41]
3 years ago
12

Lithium carbonate, li2co3, contains 18.8 % lithium and is used in the treatment of mental illnesses such as bipolar disorder. wh

at mass of lithium is present in a 1.70−g dose of lithium carbonate?
Chemistry
1 answer:
masha68 [24]3 years ago
5 0
Assuming that the percentage composition is on the basis of weight percentage, therefore the mass of lithium would simply be the product of the two, that is:
mass Lithium = 0.188 * 1.70 g
mass Lithium = 0.3196 g = 0.32 g
You might be interested in
4. Describe the water conditions in the latitudes where coral reefs are found.<br> Help
Fofino [41]

Answer:

  • Most coral reefs lie between the latitudes of 30 degrees north and south where sea temperatures are warmest.
  • it is generally present in tropical and semi-tropical waters.
3 0
3 years ago
Calculate the equilibrium constant k for the isomerization of glucose-1-phosphate to fructose-6-phosphate at 298 k. express your
k0ka [10]
We cannot solve this problem without using empirical data. These reactions have already been experimented by scientists. The standard Gibb's free energy, ΔG°, (occurring in standard temperature of 298 Kelvin) are already reported in various literature. These are the known ΔG° for the appropriate reactions.

<span>glucose-1-phosphate⟶glucose-6-phosphate          ΔG∘=−7.28 kJ/mol
fructose-6-phosphate⟶glucose-6-phosphate          ΔG∘=−1.67 kJ/mol
</span>
Therefore, the reaction is a two-step process wherein glucose-6-phosphate is the intermediate product.

glucose-1-phosphate⟶glucose-6-phosphate⟶fructose-6-phosphate 

In this case, you simply add the ΔG°. However, since we need the reverse of the second reaction to end up with the terminal product, fructose-6-phosphate, you'll have to take the opposite sign of ΔG°.

ΔG°,total = −7.28 kJ/mol  + 1.67 kJ/mol = -5.61 kJ/mol

Then, the equation to relate ΔG° to the equilibrium constant K is

ΔG° = -RTlnK, where R is the gas constant equal to 0.008317 kJ/mol-K.
-5.61 kJ./mol = -(0.008317 kJ/mol-K)(298 K)(lnK)
lnK = 2.2635
K = e^2.2635
K = 9.62


6 0
3 years ago
Read 2 more answers
Juan Carlos placed 35 grams of ke into a dry, 200-gram container. The top of the container was attached tightly. When the ice wa
lianna [129]
Correct answer is D
8 0
3 years ago
It asks for the percentage but I’m not sure how to find it when the answer is 67.1%
Vlada [557]
Since a percentage is out of 100, do the % / 100


Divide the percent by 100
4 0
3 years ago
A photon of light has an energy of 1.83 x 10-18). What is the wavelength of this light? Does this light fall in the IR, visible,
Scrat [10]

Answer:

1.09 × 10⁻⁷ m

UV region

Explanation:

Step 1: Given and required data

Energy of the photon of light (E): 1.83 × 10⁻¹⁸ J

Planck's constant (h): 6.63 × 10⁻³⁴ J.s

Speed of light (c): 3.00 × 10⁸ m/s

Step 2: Calculate the wavelength (λ) of this photon of light

We will use the Planck-Einstein's relation.

E = h × c/λ

λ = h × c/E

λ = 6.63 × 10⁻³⁴ J.s × (3.00 × 10⁸ m/s)/1.83 × 10⁻¹⁸ J = 1.09 × 10⁻⁷ m

This wavelenght falls in the UV region of the electromagnetic spectrum.

4 0
3 years ago
Other questions:
  • Consider the following reaction:
    14·1 answer
  • It is often necessary to prepare a dilute solution from a more concentrated solution rather than starting from a solid and just
    13·1 answer
  • Changing the pressure of a system has the highest effect on a substance in which phase?
    13·1 answer
  • A force of 26.4lb is applied to an area of 1.71 in2. What is the pressure?
    9·1 answer
  • Could a man with type B blood and a woman with type AB produce a child with type O blood?
    11·1 answer
  • Ms. Moulden’s science class is learning to identify metals by their density. She gave the students a table, shown below, to help
    10·2 answers
  • An unknown compound X has the empirical formula C3H6O and a molecular ion peak in its mass spectrum at m/z 116. X shows no IR ab
    7·1 answer
  • 1. Which is not a characteristic of asexual reproduction?
    5·1 answer
  • Below is a word equation. Please follow directions for each part below.
    5·1 answer
  • pyrite is a mineral composed of 46.5 mass % iron and 53.5 mass % sulfur. determine the empirical formula for calcocite.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!