Answer:
We also need the nitrogen intake
Explanation:
The nitrogen balance is the difference between the nitrogen intake and nitrogen excreted. If this calculation is positive, the body grow; if it is negative, the body is decreased.
double-replacement reaction.
c.
replacement reaction.
b.
decomposition reaction.
d.
combustion reaction.
The equation A + BX = AX + B represents a single-replacement or displacement reaction in Chemistry, where a more reactive element replaces another in a compound to form a new compound and releases the displaced element.
The equation A + BX = AX + B is a representation of a general single-replacement reaction, also known as a displacement reaction in Chemistry. In this type of reaction, a more reactive element (in this case represented by A) displaces or replaces another element (represented by B) in a compound, resulting in a new compound and a separate element as products. Here, A replaces B in the compound BX, leading to the formation of the new compound AX and the release of element B.
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The number of kilograms of fuel that are contained in one canister is 1.03 Kilograms
calculation
mass = density x volume
Density= 0.710 g/cm³
volume = 1.45 L
convert 1.45 l into cm³ to make the units uniform
that is 1 L= 1000 cm³
1.45 L= cm³
by cross multiplication
= (1.45 L x 1000 cm³) / 1 L = 1450 cm³
mass is therefore = 0.710g/cm³ x 1450 cm³ =1029.5 grams
convert grams to Kg
1 kg = 1000 grams
? kg =1029.5 grams
by cross multiplication
= (1 kg x 1029.5 grams) /1000 grams = 1.0295 Kg ≅1.03 kg
the canister contains a gas used to fuel a burner
the volume of the white gas to be used is - 1.45 L
density of white gas is 0.710 g/cm³
density is defined as the mass per unit volume
the mass of 1 cm³ of white gas is - 0.710 g
1 cm³ is equivalent to 0.001 L
the volume given is in Litres
so if 0.001 L has a mass of 0.710 g
then 1.45 L have a mass of - 0.710 g / 0.001 L x 1.45 L = 1030 g
since 1000 g is equivalent to 1 kg
mass of white fuel is - 1030 g/1000 g/kg = 1.03 kg
theres 1.03 kg of fuel in one canister
B. 3 billion years
C. 4 billion years
D. 4.5 billion years
Answer: ratio is 10⁻⁵
Explanation:
From Acid-dissociation equilibrium constant, HA is given thus,
HA + H₂O ⇄ H₃O⁺ + A⁻
equilibrium constant, Ka = [H₃O⁺] [A⁻] / [HA]
[H₃O⁺] = Ka [HA] / [A⁻]
from this we have that
pH = -log[H₃O⁺]
and pKa = -logKa
Applying Henderson-Hassel bach equation;
pH = pKa + log [A⁻]/[HA] ...........(1)
A⁻ rep the salt and HA rep the acid
at a given pH of 7, the pKa value of carboxylic acid COOH is 3
∴ from equation (1).
7 = 3 + log(COO⁻/COOH)
log(COO⁻/COOH) = 4
thus (COO⁻/COOH) = 10⁻⁴ ...................(2)
The ratio of alanine COOH to COO- at pH 7 is (COO⁻/COOH) = 10⁻⁴
(ii) Also considering the ratio of alanine NH2 to NH3+ at pH 7 we have;
given Pka value is 8,
therefore pH = pKa + log [salt]/[base]
7 = 8 + log (NH₂/NH₃)
(NH₂/NH₃) = 10⁻¹
thus the ratio of the concentration of the neutral amino acid species to the zwitterionic species at pH 7 is;
10⁻⁴ ˣ 10⁻¹ = 10⁻⁵
cheers i hope this helps
B Attach muscle to bone
C Attach bone to bone
DAttach bone to blood vessels