Answer:
Royal jelly is a honey bee secretion that is used in the nutrition of larvae and adult queens.
Nuptial flight: a flight of sexually mature social insects (as bees) in which mating takes place and which is usually a prelude to the forming of a new colony; especially : the mass flight and mating of winged sexual forms of ants after leaving the parent nest.
Cocoon: a silky case spun by the larvae of many insects for protection in the pupal stage.
Group B:
Not sure) a- Keep in cold places because when there are changes in weather, it could help the silkworm come out faster.
b-They live together in a large, well organized group and bees engage in complex activities that required works from other community members in the bee society.
c- i dont know this part sorry =(
d-The larvae of a silk moth secrete the silk thread which is used to make clothes. Honey bees produce and store honey which is nutritious food. Silkworm is a creamy white colored insect which is about 2-3 cm long and shining in nature Bee larvae have been shown to be an excellent food source for rearing insects
Explanation:
D) If only 6.6 grams of water are produced, what is the percent yield?
Write out the balanced equation:
2C2H6 + 7O2 --> 4CO2 + 6H2O
Then, determine the limiting reagents:
16.8 grams of C2H6/30.06 g/mol of C2H6 = 0.46 mol
45.8 grams of O2/32 g/mol of O2 = 1.4 mol
0.46 mol of C2H6/2 = 0.23
1.4 mol of O2/7 = 0.20
<em>- Dioxygen is the limiting reagent. </em>
Find the theoretical molar yield of water:
There is a 7 mol of O2 to 6 mol of H2O ratio (according to the balanced equation).
<em>We can setup a proportion;</em>
7/6 = 0.23/x
0.196 = x
So, 0.196 mol of water will be produced.
How many grams of water will be produced in the reaction?
<em><u>0.196 mol of H2O x 18 g/mol of H2O = 3.53 grams of H2O </u></em>
Answer:
397 g
Explanation:
From the information given in the question ,
the atomic mass of X = 12 ,
and , the atomic mass of Y = 1 .
For the molecular formula , X₇Y₁₁ , the molecular mass is given as -
X₇Y₁₁ = 7 * atomic mass of X + 11 * atomic mass of Y
= 7 * 12 + 11 * 1
= 84 + 11 = 95 g / mol
Hence , molecular mass of X₇Y₁₁ = 95 g / mol .
Moles is denoted by given mass divided by the molecular mass ,
Hence ,
n = w / m
n = moles ,
w = given mass ,
m = molecular mass .
From question ,
moles n = 4.18 mol
and ,
m = molecular mass of X₇Y₁₁ = 95 g / mol .
To find the mass of the compound X₇Y₁₁ , the above formula can be used , and putting the respective values ,
n = w / m
4.18 = w / 95
w = 4.18 * 95 = 397 g
Answer:
The reaction is:
H⁺
CaCO₃ ⇄ Ca²⁺ + CO₃ ⇄ HCO₃
The standard free energy change is ΔG = ΔH - TΔS
Explanation:
Limestone is a mineral familiar with calcium carbonate, and being very common, the acid present in acid rain dissolves it reacting with carbonate, since the acids present in acid rain are characterized by being highly soluble in water and are also strong acids. The reaction is as follows:
H⁺
CaCO₃ ⇄ Ca²⁺ + CO₃ ⇄ HCO₃
The spontaneity of the reaction is equal to:
ΔG = ΔH - TΔS
The sign of the standard free energy changes from positive to negative.
Answer: Nov 24, 2010 · A buffer solution is 0.100 M in both HC7H5O2 and LiC7H5O2 and has a pH of 4.19. Which of the following pH values would you expect from the addition of a small amount of a dilute solution of a strong base? A. 4.49 B.3.89 C.5.69 D. 3.69 E. There is not enough info to determine
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Explanation:
