Answer : The pressure at this new altitude is, 364.2 mmHg
Explanation :
Boyle's Law : It is defined as the pressure of the gas is inversely proportional to the volume of the gas at constant temperature and number of moles.
or,
where,
= initial pressure = 760 mmHg
= final pressure = ?
= initial volume = 62.3 L
= final volume = 130 L
Now put all the given values in the above equation, we get:
Thus, the pressure at this new altitude is, 364.2 mmHg
Answer:
200 grams of sodium hydroxide produce 595 grams of sodium sulfate if we have an excess of sulphuric acid
Explanation:
2 NaOH + H2SO4 → 2 H20 + Na S04
From the above chemical equation we can state that
2 moles of sodium hydroxide reacts with 1 mole of sulfuric acid to produce 1 mole of sodium sulfate.
Now if we start with 200 grams of sodium hydroxide and you have an excess of sulfuric acid then the amount in grams of sodium sulfate will be formed
2 moles of sodium hydroxide produce 1 mole of sodium sulfate.
In term of mass, we can say that
40 grams of sodium hydroxide produce 119grams of sodium sulfate
1 grams of sodium hydroxide produce (119/40) grams of sodium sulfate
then 200 grams of sodium hydroxide produce ((119*200)/40) grams of sodium sulfate
or 200 grams of sodium hydroxide produce 595 grams of sodium sulfate
Answer:
Yah, it's true.
because protons are represented as helium (²4He) which are positive.
electrons are represented as 0-1e which is negative
Answer:
(δ+) C → O (δ-)
(δ-) O ← Cl (δ+)
(δ+) O → F (δ-)
(δ+) C → N (δ-)
(δ-) Cl ← C (δ+)
(δ-) S ← H (δ+)
(δ+) S → Cl (δ-)
Explanation:
The polarity of a bond depends on the difference of electronegativity (EN) between the atoms that form it. The dipole moment (μ) points to the atom with the highest electronegativity, which is the one with a negative charge density (δ-), while the other atom has a positive charge density (δ+).
<em>The first bond is between C and O. </em>
EN(C) = 2.5; EN (O) = 3.5
(δ+) C → O (δ-)
<em>The second bond is between O and Cl. </em>
EN(O) = 3.5 ; EN(Cl) = 3.0
(δ-) O ← Cl (δ+)
<em>The third bond is between O and F. </em>
EN(O) = 3.5; EN(F) = 4.0
(δ+) O → F (δ-)
<em>The fourth bond is between C and N. </em>
EN(C) = 2.5; EN(N) = 3.0
(δ+) C → N (δ-)
<em>The fifth bond is between Cl and C. </em>
EN(Cl) = 3.0; EN(C) = 2.5
(δ-) Cl ← C (δ+)
<em>The sixth bond is between S and H. </em>
EN(S) = 2.5; EN(H) = 2.1
(δ-) S ← H (δ+)
<em>The seventh bond is between S and Cl.</em>
EN(S) = 2.5; EN(Cl) = 3.0
(δ+) S → Cl (δ-)
Answer: 60 g/ mole SiO2
Explanation: The mass of Si silicon is 28 and the mass of O oxygen is 16. There are 2 oxygen atoms so we will multiply the mass of oxygen by 2.
Si = 28
O = 16 x 2
= 60 g / mole SiO2