Answer:
Reactants: 6 molecules of carbon (iv) oxide and 6 molecules of water
Products: 1 molecule of glucose with 6 molecules of oxygen
Explanation:
Reactants: the left-hand side; and
Products: Right hand side
Answer:
1 M
Explanation:
Step 1:
Data obtained from the question. This includes the following:
Volume of base (Vb) = 100mL
Volume of ac(Va) = 20mL
Molarity of acid (Ma) = 5M
Molarity of base (Mb) =...?
Step 2:
The balanced equation for the reaction. This is given below:
HCl + NaOH —> NaCl + H2O
From the above equation, the following were obtained:
Mole ratio of the acid (nA) = 1
Mole ratio of the base (nB) = 1
Step 3:
Determination of the molarity of the base.
The molarity of the base can be obtained as follow:
MaVa/MbVb = nA/nB
5 x 20 / Mb x 100 = 1
Cross multiply to express in linear form
Mb x 100 = 5 x 20
Divide both side by 100
Mb = (5 x 20)/100
Mb = 1 M
Therefore, the molarity of the base is 1 M
We can use two equations to solve this.
(1) - E = hf
E = Energy (J)
h = plank's constant (6.63 × 10⁻³⁴ J s)
f = frequency (Hz)
(2) - v = fλ
v = velocity of the wave (m/s)
f = frequency (Hz)
λ = wavelength (m)
the λ for the given wave is 625nm (625 x 10⁻⁹ m) and the velocity of the wave is equal to speed of light (3 x 10⁸ m/s) since the wave is a light.
hence we can find the frequency of the wave by using (2) formula.
3 x 10⁸ m/s = f x 625 x 10⁻⁹ m
f = 4.8 x 10¹⁴ Hz
by using calculated frequency and (1) formula, we can find the energy of the wave.
E = 6.63 × 10⁻³⁴ J s x 4.8 x 10¹⁴ Hz
E = 3.18 x 10⁻¹⁹ J
The energy of wave is less than energy needed to eject an electron.
Hence, the metal does not eject electron.
Answer:
The glow stick in hot water will be brighter
Explanation:
The glow stick in hot water will be brighter than the glow stick in cold water because the heat from the hot water will cause the molecules in the glow stick to move faster. The faster the molecules move in the glow stick, the sooner and brighter the reaction will be. The cold water will cause molecules to move slowly and it will take longer for the reaction to occur, which will also make it less bright.
Answer:
Mass of oxygen that will be required to produce 6 mole of water is 96g .
Explanation:
Mass of oxygen = ?
Atomic mass of oxygen is =16g
Molecular mass of O₂= 32 g
Now, according to question statement we need to calculate oxygen needed to produce 6 mol of water .
In 1 mol of water ,there is O₂/2 is present or we can say that 1 oxygen atom is present .
We also know that ,
1 mol of water has = 1 mole of oxygen
Therefore ,
6 moles of water will have 6 moles of oxygen atom
Mass of 6 moles of oxygen atom can be calculated as :
Mole =given mass/atomic mass
6=X /16
X = 16 x 6
=96g
