Answers
Answer:
74.99g
Explanation:
Mass of a substance can be calculated by using the formula;
mole = mass ÷ molar mass
mass = molar mass × mole
According to this question, 37.2 moles of hydrogen gas is given.
Molar mass of hydrogen gas (H2) = 1.008(2) = 2.016g/mol
mass = 2.016 × 37.2
Mass of H2 = 74.995
Mass = 74.99g
Related Questions
If you start with 42 g of Fe-53, how much is left after 8.51 minutes? I
Answers
Answer:
2:38
Explanation:
Answer:
2.58 good luck with everything
mes.
monthly
(Chp.3)
(40) The difference of squares of two numbers is 180. The square of the smaller number is 8 times the larger number. Find
the two numbers.
Answers
The difference of squares of two numbers is 180. The square of the smaller number is 8 times the larger number. Find the two numbers.
Solution:-Let the larger number be x
And, the square of the smaller number be 8x
ATQ ,x² − 8x = 180
⇒ x² − 8x − 180 = 0
⇒ x² − (18 − 10)x − 180 = 0
⇒ x² − 18x + 10x − 180 = 0
⇒ x (x − 18) + 10(x − 18) = 0
⇒ (x − 18) (x + 10) = 0
⇒ x − 18 = 0, x + 10 = 0
⇒ x = 18, x = −10
⇒ x = −10, 18
[tex] \therefore [/tex] Either, x = −10 and x = 18
x = 18 (Positive value)
Now, the square of the smaller number = 8x = 8 × 18 = 144
So, the square of the smaller number = [tex]\sqrt{144} [/tex] = 12
The two numbers are 18 and 12. [Answer]what is the wavelength of a photon with an energy of 3.38 x 10-19J?
Answers
Answer:
C. 588 nm
Explanation:
Answer:
588 mm
Explanation:
What happens to iron in a bolt as the bolt rusts?
Answers
Iron gets converted from Fe2+ to Fe3+ during rusting. Details about rusting can be found below.
What is rusting?Rusting is the deteriorated state of iron or steel as a result of moisture and oxidation.
Rusting is characterized by a reddish-brown color on the surface of the iron.
Rusting is caused by oxidation of iron II (Fe2+) ion into iron III (Fe3+) ion.
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Question is in picture! Will give extra points and BRAINLIEST! Promise!!! No links or I will report. Make sure it’s a legitimate answer and not a link
Answers
2 Na + Cl2 --> 2 NaCl
What is the mole ratio of sodium to sodium chloride?
Answers
Answer: The mole ratio of sodium to sodium chloride 2:2.
Explanation:
As the given reaction equation is as follows.
[tex]2Na + Cl_{2} \rightarrow 2NaCl[/tex]
Here, 2 moles of sodium reacts with 1 mole of [tex]Cl_{2}[/tex] and leads to the formation of 2 moles of NaCl.
This means that 2 moles of sodium gives 2 moles of NaCl on reaction with chlorine.
Hence, the ratio of moles of sodium to sodium chloride is 2:2.
Thus, we can conclude that the mole ratio of sodium to sodium chloride 2:2.
Can someone answer this pls
Answers
Answer:12
Explanation:
Which of the following has the LONGEST wavelength
A.) a lion growling at a frequency of 85 Hz
B.) a bass guitar playing a note at a frequency of 150 Hz
C.) a man speaking at a frequency of 520 Hz
D.) an opera singer singing at a frequency of 2100 Hz
Answers
Answer:
D.) an opera singer singing at a frequency of 2100 Hz
Explanation:
Wavelength is inversely proportional to frequency.
The one having the LONGEST wavelength is a lion growling at a frequency of 85 Hz and the correct option is option A.
What is Electromagnetic scale?The electromagnetic spectrum is a range of frequencies corresponding to wavelengths which are a few kilometres to a fraction of the size of an atomic nucleus in the spectrum of electromagnetic waves.
As a wave, light has several basic properties that describe it. One is frequency, which counts the number of waves that pass by a given point in one second.
Another is wavelength, the distance from the peak of one wave to the peak of the next. These properties are closely and inversely related: The larger the frequency, the smaller the wavelength — and vice versa.
A third is energy, which is similar to frequency in that the higher the frequency of the light wave, the more energy it carries.
Therefore, The one having the LONGEST wavelength is a lion growling at a frequency of 85 Hz and the correct option is option A.
Learn more about Electromagnetic spectrum, here:
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What connects bones and muscles together?
Ligaments
Cartilage
Glue
Tendons
Answers
Answer: Tendons.
Explanation: A tendon is a fibrous connective tissue which attaches muscle to bone.
How does the structure of Ethane (C2H6) and Propane(C3H8) differ? Are they members of a Homologous series?
Answers
Answer:
Ethane & propane are members of same homologous series : alkane which is indicated with Cn H2n+2
Explanation:
Jane made this picture to represent a chemical reaction:
which of the following statements best explains the type of chemical reaction represented by Jane's picture?
A: it represents a decomposition reaction because the total mass of the product is less than the mass of the reactant
B: it represents a synthesis reaction because one combined reactant forms multiple products
C: it represents a synthesis reaction because the same atoms are present in the reactants and products
D: it represents a decomposition reaction because one reactant breaks apart and forms two products
Answers
Answer:
what does the photo look like
Explanation:
what's different between fat molecules and carbohydrate and protein molecules
Answers
Answer:
ddwadadadadwd
Explanation:
how do i open the link when i get a question answered
Answers
Answer:
Just click on the answer, if it is an external link DO NOT CLICK IT. it may contain dangerous stuff including h*cked stuff.
Explanation:
Describe how to
separate a mixture of
fillings, sulphur and salt.
Answers
Answer:
firstly for separating fillings we should use
magnet for separating it, and we left with sulphur and salt so for this we will use water
when we add water then salt get dissolve in it and we can easily take out sulphur again by evaporation we will obtain salt
hope it helps
the element chlorine is a gas. it's formula is cl2 . how many different masses of the cl2 molecule would you expect to find in a sample of chlorine gas ? explain your answer
Answers
Answer:
the answer is 3.33⋅1023 molecules of Cl2. Note that 6.022⋅1023 is also known as Avogadro's number, and it can be referred to as the number of molecules in one mole of that substance. Also, I calculated 70.9 because 35.45 g/mol (the mass of one Chlorine atom) times 2 is 70.9 g/mol (Cl2 has two Chlorine atoms).
Explanation:
Why is it important to predict consequences when decision-making?
A.Considering the consequences can help you pick the option with the best outcome.
B.Predicting consequences isn’t a step in the decision-making process.
C.There usually aren’t any consequences when making decisions.
D.Consequences won’t help you make a decision.
Answers
__M+__Q2----->___MQ3
Answers
Answer: 2M + 3Q2 -----> 2MQ3
Explanation:
2 Ms either side, and 6 Qs either side
PLEASE ITS A TEST !!!!!!!! HELPPP!!!!!
Answers
How many rings (energy levels) will an atom with 12 electrons have?
Answers
Answer:
3
Explanation:
from the KLMN shell
K has the maximum of 2 electrons
M has the maximum of 8
M has the maximum of 18
so 12 electrons fell on M shell which is the third one
that's all....have fun
Calculate the molar mass
Answers
Answer:
52
Explanation:
The brightness of a light correlates to its amplitude. The higher the amplitude, the brighter the light will appear. Which of the waves below depicts the brightest light?
Answers
Answer:
Wave X is the brightest light
Explanation:
The amplitude of a wave refers to the maximum upward or downward displacement of a wave from its rest position. This implies that the amplitude is the measured distance from rest position to crest position. Similarly, the amplitude is also measured from the rest position to the trough position.
The crest of a wave is the point on a travelling wave that has the maximum amount of positive or upward displacement from the rest position. The trough of a wave is the point on the travelling wave that has the maximum amount of negative or downward displacement from the rest position.
From the wave diagrams shown in the attachment below, the wave that shows the highest amount of upward or downward displacement from the rest position (x - axis) is wave X. Since the brightness of a light wave increases with increaese in amplitude, wave X will have the highest amount of brightness.
Balance the following chemical equation by providing the correct coefficients:
[ ]CO+[ ]H2 -> [ ]H2O + [ ]CH4
Carbon Monoxide + Hydrogen gas yields water + methane (CH4)
Answers
Answer:
CO + 3H2 -> H20 + CH4 :)) !!
how many grams are in 2 moles of copper
Answers
Answer:
In 2 moles of copper, there are 319.2172 grams.
Explanation:
Quick conversion chart of moles Copper(II) Sulfate to grams 1 moles Copper(II) Sulfate to grams = 159.6086 grams 2 moles Copper(II) Sulfate to grams = 319.2172 grams
An ideal gas is held in a rigid container at temperature of 201∘C. Upon cooling the gas, the pressure decreases by a factor of 2.0, while the volume and the amount of gas remain constant. What must be the final temperature of the gas?
Answers
Answer:
237 K
Explanation:
Given that,
Initial temperature, T₁ = 201⁰C = 474 K
Let P be the initial pressure. Upon cooling the gas, the pressure decreases by a factor of 2.0, while the volume and the amount of gas remain constant.
Final pressure = P/2
The relation between the pressure and temperature is as follows :
[tex]\dfrac{P_1}{P_2}=\dfrac{T_1}{T_2}[/tex]
Put all the known values,
[tex]\dfrac{P}{\dfrac{P}{2}}=\dfrac{474}{T_2}\\\\2=\dfrac{474}{T_2}\\\\T_2=\dfrac{474}{2}\\\\T_2=237\ K[/tex]
So, the final temperature of the gas is equal to 237 K.
How do you account for the formation of ethane during chlorination of methane
Answers
Answer:
ethane is formed due to side reaction
Explanation:
During chlorination of methane, ethane is formed due to side reaction in termination step by the combination of two methyl free radicals.
Answer:
During chlorination of methane, ethane is formed due to side reaction in termination step by the combination of two methyl free radicals.
Does somebody know the answer ?
Answers
Just a caveat: this equation isn’t balanced.
GUYS HELP PLS QUICK LOTS OF POINTS AND BRAINLIEST!
A 0.250 M solution was prepared from 135 mL of a 7.00 solution. What volume of water (in mL) was required for dilution?
Answers
Answer:
385
Explanation:
0.250m Converted to 250 mL then 250+135+ the answer
I'm not sure?
A container is filled with helium gas. It has a volume of 2.25 liters and contains 9.00 moles of helium. How many moles of helium could be held in a 1.85 liter container at the same temperature and pressure. *
Answers
Mg + HCl ➞ MgCl2 + H2
Magnesium reacts with hydrochloric acid. If 7.80 mol HCl reacts, how many grams of MgCl2 will be produced?
Answers
Answer: 371 g MgCl2
Explanation:
How many moles of HCl can be neutralized by 0.1 liter of 0.5 M NaOH? A. 0.1 B. 0.05 C. 0.5 D. 0.4
Answers
Answer:
B. 0.05
Explanation:
The reaction that takes place is:
HCl + NaOH → NaCl + H₂OAs 1 mol of NaOH reacts with 1 mol of HCl, to solve this problem what we need to do is calculate the number of NaOH moles contained in 0.1 liters of a 0.5 M solution:
Molarity = Moles / litersMoles = Molarity * liters0.5 M * 0.1 L = 0.05 molThe moles of Hydrogen chloride required to neutralize the 0.1 liter of 0.5 M Sodium hydroxide is 0.05 moles.
How do we calculate moles?Moles (n) of any substance will be calculated by using the molarity (M) as:
M = n/V, where
V = volume
Given chemical reaction is:
NaOH +HCl → NaCl + H₂O
Moles of 0.5M NaOH will be calculated as:
n = (0.5)(0.1) = 0.05 moles
From the stoichiometry of the reaction it is clear that:
1 mole of NaOH = react with 1 mole of HCl
0.05 mole of NaOH = react with 0.05 mole of HCl
Hence option (B) is correct.
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