Answers
Answer
find out the number of moles and use the molar ratio (numbers in front of formulas (in this case they are all 1) to determine how many moles of each product you are going to get theoretically
n=m/M is the equation to use to get moles here
30.8 gm/32.04 g/mol=0.9612 moles of the methanol and also of the formaldehyde so
0.9612 moles of the formaldehyde x molar mass (M) 30.73 g/mol= 29.54 gm which is the theoretical yield you already have the actual yield of 24.7 gm
then divide the actual by the theoretical to get the % yield which is 83.6%
Explanation:
Related Questions
answer quick plssssssssss
Answers
similarities of ancient and modern philosophy
Answers
Q3 - Complete the word equation *
1 point
Bromine +
Chlorine
Bromide +
Potassium
Chloride
Bromine +
Potassium
Chloride
Hydrogen
bromide +
Potassium
Chloride
Chlorine +
Potassium
Bromide ->
Answers
What are the reactants in the following equation; NaOH + HCI --> NaCl + H2O
a)NaOH and HCI
b)HCI and H20
c) NaOH and NaCl
d)HCI and water
Answers
how many molecules of NaCl are in 32.5 G
Answers
Answer :32,5 g NaCl equal 0,556 moles.
Explanation:
How many grams are in 8.50 e 23 formula units of NaCl?
a)82.5 g
b)8.25 g
c)85.0 g
d)91.5 g
Answers
Answer:
a)82.5 g
Explanation:
To solve this problem we will use Avogadro's number, which states the number of formula units per mole.
8.50x10²³formula units ÷ 6.023x10²³ formula units/mol = 1.41 molThen we convert 1.41 moles of NaCl to grams, using its molar mass:
1.41 mol NaCl * 58.44 g/mol = 82.4 gThe closest answer is option a).
Round the following number to
3 significant figures:
3,545,530
Answers
The concept of significant figures are mainly used by scientist and engineer to know the significance of digits in a measurement. Therefore, 3,545,530 upto 3 significant figures is 3.54 x 10³.
What is significant figures?Significant figures are the figures that indicate the degree of accuracy of a value. It tells about the precision of a value. It gives an idea about the digits that are necessary to indicate the experimental value.
Rules for counting significant figures are:
Number between 1 to 9 is always significant
Zeroes after a number has got no significance
Zeroes before a number has got no significance
Zeroes between number has got significance
3,545,530 upto 3 significant figures is 3.54 x 10³.
Therefore, 3,545,530 upto 3 significant figures is 3.54 x 10³.
To learn more about Significant figures, here:
https://brainly.com/question/12656148?
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Which substance is a binary acid?
• hydrochloric acid
O phosphoric acid
• nitrous acid
O sulfuric acid
Answers
Answer:
hydrochloric acid
Explanation:
how do fossils get inside rocks
Answers
Explanation:
It to be fossilized, the remains usually to be covered by sediment soon after death. sediment can include the sandy seafloor,lava,and even sticky tar. Over time, minerals in the sediment seep in to remains. The remains become fossilized.
PLS HURRY MY TEST IS TIMED
Currently, some commercially available explosives are tagged with traceable
radioactive isotopes
chemical markers
cell-signal components
acetone compounds
Answers
Answer:chemical markers
Explanation:
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1. If you have 5g of pennies how many dozen pennies do you have?
Answers
Answer:
15.69 dozen
Explanation:
Mass of penny = 5 g
Dozens of penny =..?
Next, we shall convert 5 g to gross. This can be obtained as follow:
3824 g = 1000 gross
Therefore,
5 g = 5 g × 1000 gross / 3824 g
5 g = 1.3075 gross
Thus, 5 g is equivalent to 1.3075 gross.
Finally, we convert 1.3075 gross to dozen. This can be obtained as follow:
1 gross = 12 dozen
Therefore,
1.3075 gross = 1.3075 gross × 12 dozen / 1 gross
1.3075 gross = 15.69 dozen
Thus, 5 g of penny is equivalent to 15.69 dozen
What is SiCl4 written out?
Answers
Answer:
Silicon tetrachloride
Explanation:
PLEASE HELP ASAP!!! WILL MARK BRAINLIEST!!!! 25 POINTS!!!!! IF YOU"RE JUST GOING TO ANSWER FOR POINTS PLEASE DO NOT I NEED REAL ANSWERS!!!!
2. Which gas law is this experiment investigating? How does your graph represent the gas law under investigation?
3. Using your knowledge of the kinetic molecular theory of gases, describe the relationship between volume and temperature of an ideal gas. Explain how this is reflected in your lab data.
4. Pressure and number of moles remained constant during this experiment. If you wanted to test one of these variables in a future experiment, how would you use your knowledge of gas laws to set up the investigation?
Answers
Answer:
2. for number two I asks what the experiment is showing, I need the picture of the experiment.
3. As temperature increases, the particles will gain kinetic energy causing it to move more rapidly and randomly. However, this causes the gas to expand as the particles will have more energy to roam freely. as temperature increases, Volume increases.
4. Im not sure D:
Frost forming on a car's windshield is a chemical change
True or false
Answers
Answer:
True
Explanation:
The reason why is because frost is a result of a chemical reaction
A 2.00 g sample of ammonia (NH3) reacts with 4.00 g of oxygen (O2) according to the equation 4NH3+5O2→4NO+6H2O. How much excess reactant remains after the reaction has stopped ( knowing that NH3 is the excess reactant )?
Answers
Answer:
0.017 moles of ammonia remains after the reaction is stopped.
Explanation:
The reaction is:
4NH₃ + 5O₂ → 4NO + 6H₂O
The first step is to convert the mass to moles, of each reactant:
2 g . 1mol/ 17g = 0.117 moles of NH₃
4 g . 1mol /32g = 0.125 moles of O₂
Ammonia, states the question, is the excess reactant so we can confirm it,
5 moles of oxygen need 4 moles of ammonia to react (by stoichiometry)
Then, 0.125 moles of oxygen may react to (0.125 . 4) / 5 = 0.1 moles
As we have 0.117 moles of ammonia and we need 0.1 moles.
(0.117 - 0.1) = 0.017 moles remains after the reaction is completed.
If we convert the moles to mass we have:
0.017 mol . 17 g /1mol = 0.289 g
How does pressure affect an organism plants?
Answers
Answer:
Turgor pressure in plants. Turgor pressure within cells is regulated by osmosis and this also causes the cell wall to expand during growth.
Explanation:
I hope that helps
The gametes are identical to each other and combine to make an identical organism.
True
False
Answers
Answer:
true
Explanation:
Plz help, will give brainliest!
Answers
Answer:
C
Explanation:
No change.
The total number moles of products = The Total number of reactants
Rubidium (Rb) has two isotopes. Using the data in the table below,
calculate the relative atomic mass of Rb. Give your answer to 3 significant
figures.
Answers
Answer:
85.6
Explanation:
(72 x 85) + (28 x 87)
-----------------------------
100
= 85.56
= 85.6 (3 s.f.)
Solutions of calcium nitrate and sodium chloride are mixed.
Answers
Answer:
For example, when water solutions of calcium nitrate and sodium carbonate are mixed, calcium carbonate precipitates from the solution while the other product, sodium nitrate, remains dissolved. It is a precipitate.
Explanation:
What is equilibrium in scientific terms? I need it broken down as simple as possible please because I don't understand it.
Answers
In science, literature, and everything, equilibrium has the same meaning. The meaning simply put, is balance. If you wanted a sentence example, it could be something like:
'He sat down to try and recover his equilibrium.'
Or
'They can't maintain enough equilibrium to ride a bike.'
I hope you understand the meaning now?
Why is pathogen a better word choice than "Germ"?
Answers
Answer: because its more scientific and "formal"? I guess.
Explanation:
A gas in the form of Bubbles is released is it a chemical change or a physical change
Answers
Answer:
The formation of a gas is a clue to chemical changes. The bubbles of gas that you observed form when an antacid is dropped into water is an example of change. Another clue that a chemical change has occurred is the formation of a solid.
Explanation:
6. The Haber process for making ammonia (NH)
gas from its elements was developed by Fritz Haber
during WWI. Haber hoped to use ammonia as
fertilizer to grow food for Germany during the
Allie's blockade. How many liters of hydrogen
would be required to produce 40.0L of ammonia at
STP? N+H, NH,
Answers
Answer:
60 Liters
Explanation:
The equation for this reaction is given as;
N2 + 3H2 → 2NH3
From the reaction;
3 mol of H2 produces 2 mol of NH3
At STP;
1 mol = 22.4 L
This means
67.2 L ( 3 * 22.4) of H2 produces 44.8 L ( 2 * 22.4) of NH3
How many L of H2 would produce 40 L of NH3
67.2 = 44.8
x = 40
Solving for x;
x = 40 * 67.2 / 44.8
x = 60 L
How are chemical reactions classified from an energy point of view?
Answers
Answer:
normanie tykohoukdh kjdj jj jjd
Explanation:
For the reaction, ?N2 + ?H2 → ? NH3,
What is the maximum amount of NH3 which could be formed from 12.26 mol of N2 and 2.11 mol of H2? Answer in units of mol.
Answers
Explanation:
➢number of moles. Moles and Chemical Reactions. Chapter 4. 3 H2. + N2. →. 2 NH3 ... How many grams of NH3 would form if 2.11 moles of N2 reacted with ...
Nitric monoxide (NO) reacts with oxygen gas to form nitrogen dioxide (NO₂), a dark brown gas. If 5.895 mol of NO is mixed with 2.503 mol of O₂,
determine the limiting reagent.
calculate the number of grams of NO₂ produced.
and determine how many grams of excess reagent remain unreacted.
Answers
Answer:
Limiting reactant: O2
grams NO2 produced = 230.276 g NO2
grams of NO unused = 26.67 gNO
Explanation:
2NO + O2 --> 2NO2
Step 1: Determine the molar ratio NO:O2
molar ratio NO:O2 = 5.895: 2.503 = 2.35
stoichiometric molar ratio NO:O2 = 2:1
So, O2 is the limiting reactant.
Step2: Determine the grams of NO2:
?g NO2 = moles O2 x (2moles NO2/1 mol O2) x (MM NO2/ 1 mol NO2) = 2.503 x 2 x 46 = 230.276 g NO2
Step 3: Determine the amount of excess reagent unreacted
moles excess NO reacted = moles O2 x (2 moles NO/1 mol O2) = 2.503 x 2 = 5.006 moles NO reacted
moles NO unreacted = total moles NO - moles NO reacted = 5.895-5.006 =0.889 moles NO unreacted
mass NO unreacted = moles NO unreacted x MM NO = 0.889 x 30 =26.67 g NO unreacted
How many grams of oxygen were used if 3.0 moles of aluminum oxide are produced
Answers
Answer:
143.9946 g
Explanation:
helppp its qboutt cellsss
Answers
Answer:
sorry if this is wrong but B
Explanation:
ITS C
Oxygen, APT, and Glucose
Why do metal boats float?
Answers
Answer:
I hope this will help you
Explanation:
The air that is inside a ship is much less dense than water. That's what keeps it floating! The average density of the total volume of the ship and everything inside of it (including the air) must be less than the same volume of water.
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