Answer:
I guess this answer is c
yh
Answer:
b. (Actual yield ÷ theoretical yield) x 100
Explanation:
The percent yield will be a ratio of collected or actual yield to the theoretical yield. Like any percentage, you are determining a part of a whole. You multiply by 100 to convert your decimal answer from the division into a percentage.
Air in a closed cylinder is heated from 15°C to 36°C. If the initial pressure is 1000 torr, determine what is the final pressure? *
Answer:
1072 torr
Explanation:
To answer this problem we can use Gay-Lussac's law, which states:
P₁T₂=P₂T₁Now we convert the given temperatures into K:
T₁ = 15°C ⇒ 15+273.16 = 288.16 KT₂ = 36°C ⇒ 36+273.16 = 309.16 KWe input the data:
1000 torr * 309.16 K = P₂ * 288.16 KAnd solve for P₂:
P₂ = 1072 torri need help with this ASAP please i don’t understand this
Answer:
750 mmHg
Explanation:
From the question given above, the following data were obtained:
Partial pressure of CO₂ (Pₐ) = 250 mmHg
Partial pressure of N₂ (P₆) = 375 mmHg
Partial pressure of He (P꜀) = 125 mmHg
Pressure of the mixture (Pₜ) =?
The pressure of the mixture of the gases can be obtained as follow:
Pₜ = Pₐ + P₆ + P꜀
Pₜ = 250 + 375 + 125
Pₜ = 750 mmHg
Therefore, the pressure of the mixture of the gases is 750 mmHg
In a Sodium ion 11Na +1
atomic number =11
mass number =23 ,
the number of electrons =
Answer:
11 electrons
Explanation:
The number of electrons is the same as the number of protona in a ATOM.
They will most likely be different in a ion, simple bond or a convalent bond.
What is the phase label on CI?
A. aq
B.
C. e
D. g
E. s
Answer:
Pubic hair smells bad
Explanation:
What season is represented in the northern hemisphere? *
5 points
Captionless Image
A. Spring
B. Summer
C. Fall
D. Winter
Answer:
B. summer
Explanation:
The northern hemisphere experiences summer during the months of June, July, and August because it is tilted toward the sun and receives the most direct sunlight.
Why didn't you just clean the spill with water?
Answer:
if you did it would probably make it bigger...
Explanation:
:)
metal and one atom of a group
The following Lewis representation depicts a reaction between one atom of a group
nonmetal
eg
X.
+
x*
+
In this representation, each
atom loses
electron(s) and each
atom gains
electron(s)
Teg
The bonds that form in the product would be
Explanation:
X = Group 1 metal
Y = Group 7 Non metal
The dots basically signifies the group.
Metal loses electrons and non metal gains electron. The valency of X is 1 and that of Y is 7.
X atom loses one electron and Y atom gains one electron.
The bond that forms between a metal and a non metal is an ionic bond.
Convert 1.55 x 10^24 ATOMS OF CARBON TO MOLES OF CARBON
Answer:
2.57 moles of carbon
Explanation:
1 mole = 6.023x10^23 (this is called avogadro's number)
1/6.023x10^23
1.55x10^24 = 1.55x10^24/6.023x10^23 = 2.57 moles
this means, 1.55x10^24 atom contains 2.57 moles of carbon
Take your time please.
Answer:
1.) Eyewash station --> D
2.) Absorbent material --> G
3.) Fire extinguisher --> F
4.) Safety Shower --> E
5.) Biohazard container --> J
6.) Broken glass container --> I
7.) Safety goggles --> C
8.) Lab apron --> H
9.) asbestos gloves --> A
10.) Latex gloves --> B
Explanation:
In an equipped laboratory, alot of safety equipments are made available and kept in area that it could be easily accessed in the laboratory. Safety or protective equipments are those materials that helps protect a laboratory personnel while at work on the lab.
These equipments include:
--> Eyewash station: This is an equipment used in the laboratory during emergency to rinse chemical from the eye. Therefore option D is correct.
--> Absorbent material: They are used to contain small spills in the laboratory. Therefore option G is correct.
--> Fire extinguisher: This equipment is used to put out small fires. Therefore F is correct.
--> Safety Shower: This is used to rinse away chemical from clothes and on skin during emergency. Therefore option E is correct.
--> Biohazard container: This container is used to safely dispose bacteria culture, blood and other living tissues. Therefore option J is correct.
--> Broken glass container: This is used to dispose cracked, chipped or broken bottle in the laboratory. Therefore option I is correct.
--> Safety goggles: This helps to protect the eye from chemical and broken glasses. Therefore option C is correct.
--> Lab apron: This is worn by the laboratory personnel to help protect the skin from chemical and biohazards. Therefore option H is correct.
--> Asbestos gloves: these are heat resistant gloves used to protect the hands from heat. Therefore option A is correct.
--> Latex gloves: these are equally worn by the laboratory personnel to protect the hands from chemicals and biohazards
[tex]Answer :—✔[/tex]
THE OTHER PERSON GAVE THE CORRECT ANSWERAn experiment requires 66.6 g of ethyl alcohol (density = 0.790 g/mL). What is the volume?
Answer:
Volume = 84.30 mLExplanation:
Mass = 66.6 gram
Density = 0.790 g/mL
Volume = Mass ÷ Density
Volume = 66.6 ÷ 0.790
Volume = 84.30 mL
Small particles that settle out of wind and water are called.
Where does thermal energy go? Assuming you forgot your hot food and came after a while and found it cold now. Where did the energy go?
what mass of sodium hydroxide is needed to neutralise 24.5kg of sulfuric acid
H2SO4 + N2 = 2NH3
Answer:
23.92 g
Explanation:
Molar mass of H2SO4 = (2×1)+32+(16×4)= 2+32+48= 82g/mol
H2SO4 + 2NaOH ---> Na2SO4 + 2H2O
I mole of H2SO4 = 2 moles of NaOH
24.5/82 = 24.5/82 × 2
= 0.598 moles of NaOH will neutralize
Mass= mole× molar mass
Molar mass of NaOH= 23+16+1 = 40g/mol
Mass= 0.598 × 40 = 23.92g of NaOH
Answer:
20g
Explanation:
First of all, you have got your formula wrong. It should be [tex]H_{2}SO_{4} + 2NaOH = Na_{2}SO_{4} + 2H_{2}O[/tex].
Start by finding the Relative Formula Mass for sulfuric acid. [tex]H_{2}SO_{4}[/tex] is equal to (2x1)+32+(16x4)=98. You then calculate Mols by doing [tex]Mols=\frac{Mass}{Relative Formula Mass}[/tex]. So, [tex]\frac{24.5}{98} = 0.25[/tex], so the Mols of Sulfuric Acid is 0.25.
The Mol ratio of Sulfuric Acid to Sodium Hydroxide is 1:2, so 0.25:0.5.
Now, you have to find the Relative Formula Mass of Sodium Hydroxide, or [tex]NaOH[/tex]. 23+16+1=40. Finally, multiply 0.5 by 40, and you'll find that the maximum mass is 20g.
What is the pH of a 0.00200 M HCl solution?
Answer:
pH value of HCL = 2.69897
Explanation:
Given:
Concentration of HCL = 0.002 M
Find:
pH value of HCL
Computation:
pH value of HCL = - log(Concentration of HCL)
pH value of HCL = - log(0.002)
pH value of HCL = 2.69897
Which of these is a carbohydrate?
1. C6 H12 O6
2. C6 H6 O12
3. C6 H13 O2 N
4. C3 H7 O2 Ns
Answer:
C6H12O6
Glucose
Explanation:
Glucose is a monocarbohydrate
carbohydrates always have only C, H, and O
brainliest plz
PLEASE ANSWER True or False: When adding reactions together to get a desired reaction you must also add their enthalpies to get the enthalpy of that desired reaction.
Answer:
true
Explanation:
A white crystalline salt conducts electricity
when it is melted and when it is dissolved
in water. Which type of bond does this salt
contain?
A. ionic
B. metallic
C. covalent
D.
network
Calculate the number of moles in 42.15g of magnesium carbonate.
Answer:
0.5mol
Explanation:
Please mark as brainliest
25. What is a subdivision of a family? *
O kingdom
O domain
O genus
O species
A student performed a similar experiment we have done, with Ag and O to produce silver oxide.
Mass of crucible and lid: 29.307 g
Mass of crucible, lid, and silver: 30.958 g
Mass of crucible, lid, and silver oxide: 31.080 g
Use the above data to calculate the moles of the metal used in this experiment. your answer must include correct significant figures and unit.
Answer:
0.0153 mol
Explanation:
Mass of crucible and lid: 29.307 g
Mass of crucible, lid, and silver: 30.958 g
Number of moles = Mass /Molar mass
Mass of Silver = Mass of crucible, lid, and silver - Mass of crucible and lid
Mass of siilver = 30.958 g - 29.307 g
Mass of silver = 1.651 g
Molar mass of silver = 107.868 g/mol
Number of moles = 1.651 g / 107.868 g/mol
Number of moles = 0.0153 mol
what explains the bonding in a compound made from carbon and hydrogen
1) ch4 because every hydrogen gets two electrons to bond
2) ch4 because 8 electrons are shared in this molecule
Answer:
2) ch4 because 8 electrons are shared in this molecule
Explanation:
The bond between carbon and hydrogen in the molecule; CH4 is a covalent bond. This bond involves sharing of electrons. Carbon has a valency of 4 and needs four more electrons to complete it's electronic configuration. These 4 electrons are taken care of by the 4 hydrogen atoms which each have a valency of 1.
What is the meaning of ground state energy?
hope it helps you ❣❣
Mark me as brainliest
Will give brainlist please help
what is the volume, in liters, of 5.500 mol of C3H3 gas at STP
Answer:
123.2 Liters.
Explanation:
At STP (T = 273K & P = 1atm), one mol of any gas will occupy 22.4 liters.
With the above information in mind, we can calculate how many liters would 5.500 mol of gas occupy:
5.500 mol * 22.4 L / mol = 123.2 L
So 5.500 moles of C₃H₃ would have a volume of 123.2 liters at STP.
NEED HELP ON THIS NOW PLEASE
Answer:
A. Bees bringing pollen from the flower of one plant to the flower of another plant.
Explanation:
Genetic diversity in organisms is enhanced by the process of sexual reproduction due to the meiotic process that the participant organisms undergo to produce gametes. A process unique to meiosis called CROSSING OVER ensures that the alleles of genes are recombined in the GAMETE or sex cells.
According to this question, POLLINATION, which is the transfer of pollen from a male flower to a female one, will lead to sexual reproduction via fertilization. However, a cross-pollination, which requires a pollinator like the bees in this question will ensure the most genetic diversity among the offsprings.
please help due in 2 minutes
Answer:
1
Explanation:
the answer is the first option because it's at less of an incline than the others, hope this helps!
supposing on a hypothetical garden 43 identical trees contains a total of 19565 leaves. if each branch on a given tree consist of 35 leaves how many branches does each tree have?
Answer:
13 branches/tree
Explanation:
Step 1: Given data
Total number of trees (t): 43 treesTotal number of leaves (l): 19565 leavesNumber of leaves per branch (l/b): 35 leaves/branchStep 2: Calculate the total number of branches (b)
We will use the following expression.
b = l × b/l
b = 19565 leaves × 1 branch/35 leaves = 559 branch
Step 3: Calculate the number of branches per tree (b/t)
We will divide the total number of branches by the total number of trees.
559 branches/43 trees = 13 branches/tree
Do Newton's Laws still apply in space?
Answer:
Yes, they work in space. I forgot an example, will edit the post when I found it
Hope this helps!
What's the mass in grams of 0.334 moles of sucrose (C12H22O11)?
Answer:
114.23g
Explanation:
Mass = xg
Mole = 0.334 mol
Molar mass of Sucrose
(C = 12, H = 1, O = 16)
C12H22O11
(12×12)+(1×22)+(16×11)
144 + 22 + 176
342g/mol
Mass = No of mole × Molar mass
Mass = 0.334 × 342
Mass = 114.228
Mass ≈ 114.23g
Help please it’s due in 3 minutes
Answer:
A
Explanation:
Both students are Pushing/Pulling towards the same direction meaning if enough force is applied the object will move into that direction