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
PLEASE HELP MEEE THIS IS FOR a gradE AND IF I FAIL I FaIL THIS CLASs HELP ME
Answer:
stream
Explanation:
because a stream goes into a lake
Answer:
D) Stream
Explanation:
Can anyone help me with this algebraic expression
(4a+3b)² (3a-4b)²
Answer:
=144a⁴−168a³b−239a²b²+168ab³+144b⁴
Explanation:
=144a⁴−168a³b−239a²b²+168ab³+144b⁴
Answer:
[tex](4a + 3b)(4a + 3b)(3a - 4b)(3a - 4b) \\ {16a}^{2} + 12ab + {9b}^{2} + 12ab + {9a}^{2} + 12ab + 12ab + {16b}^{2} \\ {16a}^{2} + {9a}^{2} + {9b}^{2} + {16b}^{2} + 12ab + 12ab + 12ab + 12ab \\ {25a}^{2} + {25b}^{2} + 48ab[/tex]
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.
Answer:
85.6
Explanation:
(72 x 85) + (28 x 87)
-----------------------------
100
= 85.56
= 85.6 (3 s.f.)
Measurements show that unknown compound X has the following composition:
element mass %
carbon 74.8%
hydrogen 25.1%
Write the empirical chemical formula of X. please help
the empirical chemical formula of X is CH4
Explanation:Step 1: Imagine you have a sample of compound weighing exactly . Multiply the mass of this sample by the mass percents to find the mass of each element in the sample
Step 2: Divide the mass of each element by the element's molar mass to find the moles of each element in the sample. Remember to round your answers to the correct number of significant digits.
Step 3: Divide the moles of each element by the the smallest number of moles of any element to find the mole ratio of elements in the sample.
Step 4: Multiply the mole ratio by the smallest whole number that changes it into a whole number ratio to find the atom ratio of elements in the sample.
Note that the result of each multiplication must equal a whole number only within measurement uncertainty.
The measurement uncertainty in this calculation comes from the measurement uncertainty of the mass percents given in the question. The mass percents each have significant digits. That means each mass percent has some measurement uncertainty in the third significant digit, and only the first two significant digits can be considered completely reliable.
In Step 1 you multiplied each mass percent by something with zero uncertainty (the exactly you assumed your sample weighed), in Step 2 you divided by a measurement with more than significant digits (the molar mass of the elements), and in Step 3 you divided by a measurement with the same number of significant digits (the least number of moles of any element in the compound). None of these steps added to the measurement uncertainty of your calculation.
Therefore, the measurement uncertainty in the final result of all your calculations is determined by the measurement uncertainty in the original mass percents and will be in the third significant digit. That means the result of each of the final multiplication steps must equal a whole number only to within the first two significant digits.
The whole numbers in the last column of the table are and .
Please help me with dis
Answer:
c
Explanation:
what is the meaning of flourish?
A gas in the form of Bubbles is released is it a chemical change or a physical change
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:
Q3 - Complete the word equation *
1 point
Bromine +
Chlorine
Bromide +
Potassium
Chloride
Bromine +
Potassium
Chloride
Hydrogen
bromide +
Potassium
Chloride
Chlorine +
Potassium
Bromide ->
how do fossils get inside rocks
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.
Which date has the longest daylight and the shortest darkness
The Winter Solstice.
An atom of an element always contains
Answer:
An atom of an element always contain three fundamental particles called electrons(e-) , neutron ( n zero) and protons ( p+)
An atom of an element always contains a proton, electron and neutron.
What is an atom ?Every atom is made up of a nucleus and one or more electrons that are attached to the nucleus. One or more protons and a number of neutrons make up the nucleus. Only the most common type of hydrogen is neutron-free. Every solid, liquid, gas, and plasma is made up of atoms that are either neutral or ionized.
But when it comes to the word atom, we must go back to 400 B.C. Greece. And Democritus, a brilliant philosopher, proposed the Greek word atomos, which means uncuttable.
Every atom is made up of a nucleus and one or more electrons that are attached to the nucleus. One or more protons and a number of neutrons make up the nucleus.
Thus, An atom of an element always contains a proton, electron and neutron.
To learn more about an atom, follow the link;
https://brainly.com/question/29695801
#SPJ2
1. If you have 5g of pennies how many dozen pennies do you have?
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
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
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).
Name the following cycloalkane:
CH2CH2CH2CH3
A. butylcyclohexane
B. butylcyclopentane
C. propylcyclohexane
Answer:
The answer for this question is A. butylcyclohexane
Explanation:
Choose letter A
You welcome have a nice day.
Name of the given compound is butyl cyclohexane.
What are cyclo alkanes?Cyclo alkanes are those organic compounds in which alkanes are present in the cyclic form.
In the nomenclature of cyclo alkane, name of the substitute is put before the name of the main ring. In the given structure number of carbons in ring is 6 so that given cycloalkane is cyclohexane and butyl group is attached as substitute. So name of the given compound is butyl cyclohexane.
Butyl cyclopentane is wrong because 6 carbons are present in ring.Propylcyclohexane is also wrong because 4 carbons are attached in the ring.Hence name of the compound is butyl cyclohexane.
To know more about cycloalkanes, visit the below link:
https://brainly.com/question/25058711
#SPJ2
If I had 50 graham cracker squares, 15 marshmallows, and 100 little
chocolate pieces, how many total s'mores could I make before I ran out of
ingredients?
please help! Will give Brainliest!
Answer: the answer is c
Explanation:
also, is that canvas? sajdasds
A balloon occupies 175 cm at 25.0 C. What volume will it occupy at 42.5 °C?
175 cm³ instead of 175 cm.
Answer:
297.5 cm³
Explanation:
From the question;
Initial volume; V1 = 175 cm³
Initial temperature; T1 = 25°C
Final temperature; T2 = 42.5°C
From Charles law we can find the volume V2 from the equation;
V1/T1 = V2/T2
Making V2 the subject gives;
V2 = V1 × T2/T1
V2 = (175 × 42.5)/25
V2 = 297.5 cm³
-->
Give the products of this neutralisation reaction: Sulfuric acid + magnesium hydroxide
Magnesium combined with sulfuric acid produces magnesium sulfate and hydrogen gas.
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 )?
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
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?
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:
HELP PLEASE
What does the 2 mean in the formula of calcium nitrate? What does the 3
mean?
Answer:
Calcium nitrate is an inorganic compound with the chemical formula Ca(NO3)2. ... It is a nitrate salt of Calcium which contains calcium and nitrogen and oxygen. Calcium nitrate is a white or whitish-grey coloured granular solid which absorbs moisture from the air and is usually found as a tetrahydrate compound Ca(NO3)2.
Explanation:
similarities of ancient and modern philosophy
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
What are the charges on ions of Group 1A, Group 3A (aluminum), and Group 5A?
Answer:
Group 1A: 1+
Group 3A: 3+
Group 5A: 3+ or 5+
Explanation:
What is the percent composition of each element in the compound below:
CrPO4
How does pressure affect an organism plants?
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
How are chemical reactions classified from an energy point of view?
Answer:
normanie tykohoukdh kjdj jj jjd
Explanation:
the indicated gene codes for a protein made up of the amino acid
Answer:
N/A
Explanation:
Is this a true or false answer or.....?
If combining cation A with a +3 charge and anion X with a -3 charge, how would we write the compound?
O AX
O A3X3
O 3AX
Answer: it’s not A3X3
Explanation:
1. AX
For binary ionic compounds (ionic compounds that contain only two types of elements), the compounds are named by writing the name of the cation first followed by the name of the anion.If a cation A carries +3 charge and an anion X carries -3 charge, the compound so formed is AX. Since the charges gets cancelled out.For example: consider aluminum phosphate, aluminum carries +3 charge and phosphate carries -3 charge, the molecular formula for the compound will be AlPO₄.Learn more:
brainly.com/question/11164440
how many molecules of NaCl are in 32.5 G
Answer :32,5 g NaCl equal 0,556 moles.
Explanation: