The pH level of tomato juice is 4.2. What is the hydrogen-ion concentration [H+] for tomato juice?A. 0.0004 B. 0.0006 C. 0.00004 D. 0.00006
Answers
pH = -log[H+]
4.2 = - log [H+]
[H+] = 6.31 x 10^-5 M
Therefore, the correct answer from the choices listed above is option D, 0.00006 M.
[H+] = 10 ^- pH
[H+] = 10 ^- 4.2
[H+] = 0.00006 M
Answer D
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A balloon is a sphere with a radius of 5.0 m. The force of air against the walls of the balloon is 45 N. What is the air pressure inside the balloon? (surface area = 12.56 x radius^2; 1 Pa = 1 N/m^2)A. 1.4 x 10^3 PaB. 3.6 x 10^2 PaC. 1.4 x 10^-1 PaD. 3.6 x 10^-2 Pa***Idk how to solve this... pls explain?? thx :)
What is the temperature increase of 6.4 kg of water when it is heated by a 7.7
Is NO a polar molecule?
When dilute sulphuric acid is added to barium chloride solution then what happens in a balanced equation?
Answers
The strength of intermolecular forces of attraction varies depending on the type of molecules involved. In general, the order of increasing strength of intermolecular forces is as follows:
1. **London Dispersion Forces (Van der Waals Forces):** These are the weakest intermolecular forces and occur in all molecules. They are caused by temporary fluctuations in electron distribution, leading to temporary partial charges. London dispersion forces are stronger in larger and more polarizable molecules.
2. **Dipole-Dipole Forces:** These forces occur between polar molecules with permanent dipoles. They are stronger than London dispersion forces and result from the attraction between the positive end of one molecule and the negative end of another.
3. **Hydrogen Bonding:** This is the strongest type of intermolecular force. It occurs when hydrogen is bonded to a highly electronegative atom (such as nitrogen, oxygen, or fluorine) and is attracted to another electronegative atom in a different molecule. Hydrogen bonds are responsible for the unique properties of substances like water and ammonia.
So, hydrogen bonding generally represents the strongest intermolecular force of attraction among these three types. However, it's important to note that the actual strength of these forces can also depend on factors such as molecular size, shape, and temperature.
Hope you understand
B. the nuclear lamina.
C. the nuclear envelope.
D. the endoplasmic reticulum.
Answers
Answers
Answer:- A. is not the correct formula.
Explanations:- Charge for Ba is +2 and charge for O is -2, Here the charges are in equal and opposite so their ratio is 1:1 and hence the formula must be BaO and not .
Rest of the formulas are correct as charge for Ca is +2 and charge for N is -3 . On criss cross we get the formula .
Charge for K is +1 and charge for Cl is -1 and so KCl is correct.
Charge for Li is +1 and that for S is -2. On criss cross we get the formula .
Answers
Answer: Option (B) is the correct answer.
Explanation:
A solution that has maximum concentration of solute particles and on adding more solute the particles of solute remains undissolved is known as a saturated solution.
Whereas when particles of solute keep on dissolving in a solution then it is known as an unsaturated solution.
Thus, we can conclude that a solute is added to water and a portion of the solute remains undissolved. When equilibrium between the dissolved and undissolved solute is reached, the solution must be saturated.
7.5 billion
9.0 billion
6.6 billion
Answers
Answer:
The correct answer is option B, 7.5 billion
Explanation:
As per the US Census Bureau, the world population in year 2016 was approximately US
7346235000. As per the UN estimate there were 7 billion people on planet earth in 2011 and World Bank estimates say that there were 7 billion people in year 2012
The top most populated countries in coming year (along with their population) would be
China 1,367,485,388
India 1,251,695,584
United States 321,368,864
Answers
Total, 2.28916 × 10²⁴ atoms of carbon in 3.8 moles of methane.
To calculate the number of atoms of carbon in 3.8 moles of methane (CH₄), we need to consider the molecular formula of methane, which is CH₄. This indicates that each molecule of methane contains one carbon atom (C) and four hydrogen atoms (H).
First, let's find total number of carbon atoms in 3.8 moles of methane:
Number of moles of carbon in 1 mole of methane (CH₄) = 1 mole (because there is 1 carbon atom in each molecule of CH₄)
Number of moles of carbon in 3.8 moles of methane = 3.8 moles
Now, we'll use Avogadro's number to convert moles to the number of atoms:
Avogadro's number (NA) = 6.022 × 10²³ atoms/mol
Number of carbon atoms in 3.8 moles of methane = 3.8 moles × Avogadro's number
Number of carbon atoms in 3.8 moles of methane = 3.8 moles × 6.022 × 10²³ atoms/mol
Now, let's calculate:
Number of carbon atoms in 3.8 moles of methane ≈ 2.28916 × 10²⁴ atoms
So, there are approximately 2.28916 × 10²⁴ atoms of carbon in 3.8 moles of methane.
To know more about carbon atoms here
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