Answer:
A. move materials through the body
Explanation:
The blood circulatory system (cardiovascular system) transports materials and delivers nutrients and oxygen to all cells in the body.
Answer is: ratio of water and magnesium sulfate is 7 : 1.
m(MgSO₄ · xH₂O) = 2,43 g.
m(MgSO₄) = 1,19 g.
m(H₂O) = 2,43 g - 1,19 g.
m(H₂O) = 1,24 g.
n(H₂O) = m(H₂O) ÷ M(H₂O).
n(H₂O) = 1,24 g ÷ 18 g/mol.
n(H₂O) = 0,069 mol.
n(MgSO₄) = m(MgSO₄) ÷ M(MgSO₄).
n(MgSO₄) = 1,19 g ÷ 120,36 g/mol.
n(MgSO₄) = 0,0099 mol.
n(MgSO₄) : n(H₂O) = 0,0099 mol : 0,069 mol.
n(MgSO₄) : n(H₂O) = 1 : 7.
Answer:
0.529
Explanation:
Let's consider the reaction A → Products
Since the units of the rate constant are s⁻1, this is a first-order reaction with respect to A.
We can find the concentration of A at a certain time t () using the following expression.
where,
[A]₀: initial concentration of A
k: rate constant
In a periodic table periods are horizontal and groups are vertical. Horizontal is left to right and vertical is up and down.
Hope this helps!
Explanation:
Oxidation state of Nitrogen in N2O5 is +5