Explanation:
Mole ratio of Oxygen to Hydrogen gas = 1 : 2.
If we use 3.0 moles of oxygen gas, we would need 3.0 * 2 = 6.0 mol of hydrogen gas.
However we only have 4.2 mol of hydrogen. Therefore hydrogen is limiting and oxygen is in excess. (B)
How many cobalt atoms are in 345 g of cobalt
Answer:
[tex]\boxed {\boxed {\sf About \ 3.53 \ *10^{24}atoms \ Co}}[/tex]
Explanation:
To convert from grams to atoms:
Convert grams to moles Convert moles to grams1. Convert grams to moles
First, find the molar mass of cobalt using the Periodic Table of Elements.
Cobalt (Co): 58.93319 g/molNext, use this mass as a ratio or fraction.
[tex]\frac{58.93319 \ g\ Co}{1 \ mol \ Co}[/tex]
Multiply the mass of the given sample (345 grams) by this ratio.
[tex]345 \ g \ Co *\frac{58.93319 \ g\ Co}{1 \ mol \ Co}[/tex]
Flip the fraction so the grams of Cobalt will cancel each other out when multiplying.
[tex]345 \ g \ Co *\frac{1 \ mol \ Co}{58.93319 \ g\ Co}[/tex]
[tex]345 \ *\frac{1 \ mol \ Co}{58.93319 }[/tex]
[tex]\frac{345 \ mol \ Co}{58.93319 } =5.854086636 \ mol \ Co[/tex]
2. Convert moles to atoms
Use Avogadro's Number, which tells us the number of units (in this case atoms) in 1 mole.
[tex]6.022 *10^{23} \ atoms/mol[/tex]Use this number as a ratio or fraction.
[tex]\frac{6.022 * 10^{23} \ atoms \ Co}{1 \ mol \ Co}}[/tex]
Multiply this ratio by the number of moles we found.
[tex]5.854086636 \ mol \ Co*\frac{6.022 * 10^{23 }\ atoms \ Co}{1 \ mol \ Co}}[/tex]
The moles of Cobalt will cancel.
[tex]5.854086636 \ *\frac{6.022 * 10^{23 }\ atoms \ Co}{1 }}[/tex]
[tex]5.854086636 \ *{6.022 * 10^{23 }\ atoms \ Co}[/tex]
[tex]3.52533097*10^{24} \ atoms \ Co[/tex]
3.Round
The original measurement of 345 has 3 significant figures (3, 4, and 5). We must round to 3 sig figs, which is the hundredth place for this measurement.
[tex]3.52533097*10^{24} \ atoms \ Co[/tex]
The 5 in the thousandth place tells us to round the 2 to a 3.
[tex]3.53 \ *10^{24}atoms \ Co[/tex]
There are about 3.53*10²⁴ atoms of cobalt in 345 grams.
What is the mass of LaTeX: 2.486 * 10^{24} atoms of neon?
Select one:
a. 83.33 g Ne
b. 0.2046 g Ne
c. 8.333 g Ne
d. 4.130 g Ne
Answer:
Mass = 83.33 g
Explanation:
Given data:
Number of atoms of neon = 2.486×10²⁴
Mass of neon = ?
Solution:
Avogadro number:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ atoms
2.486×10²⁴ × 1 mol / 6.022 × 10²³ atoms
0.413×10¹ mol
4.13 mol
Mass of neon:
Mass = number of moles × molar mass
Mass = 4.13 mol × 20.18 g/mol
Mass = 83.33 g
soap making ingredients list (not harmful chemicals)
20 oz. coconut oil
10 oz. olive oil
9 oz. distilled water
essential oils
colorants (optional)
dried herbs or flowers (optional)
soap base accordingly
How do SMRs provide more flexibility than ordinary nuclear reactors?
Select all that apply.
More reactors can be installed at a location as the energy demand increases.
Power plants can be built to fit locations with less demand or less space.
The SMRs can use multiple types of fuel and recycle byproducts if needed.
The SMRs can adjust their energy output using coolants and control rods.
Answer:
The SMRs can adjust their energy output using coolants and control rods.
Power plants can be built to fit locations with less demand or less space.
Explanation:
I think that it is but I am not sure.
Power plants can be built to fit locations with less demand or less space. The SMRs can adjust their energy output using coolants and control rods. The correct options are B and D.
What are SMRs?A wireless communications technology that competes with traditional cellular services. The base station equipment supplier is the transmitter licensee in an SMR system.
Power plants can be built to accommodate locations with low demand or limited space. Coolants and control rods allow SMRs to adjust their energy output.
These advanced reactors, which are expected to range in size from tens to hundreds of megawatts, can be used for power generation, process heat, desalination, or other industrial applications.
Light water or other non-light water coolants, such as a gas, liquid metal, or molten salt, may be used as a coolant in SMR designs.
Thus, B and D are correct options.
For more details regarding modularity, visit:
https://brainly.com/question/11797076
#SPJ2
PLS HELPPPPPPP and explain how to do it
Answer: 3.613x10^24
Explanation: Avogadro’s number represents the number of atoms in one mole of substance: 6.022x10^23 atoms/mole. Multiplying the number of moles by this number reveals that, in this sample, 3.613x10^24 atoms of methane are present.
Answer: A
Explanation: When using dimensional analysis, always put similar unit-ed numbers diagnolly from each other so they 'cross out'
For example, If you had 1 mol of gold and you wanted to convert it to grams using gold's molar mass, 196.97 g/mol, it would look like this:
Start with the given number over nothing:
[tex]\frac{1 mol Au}{} *\frac{ }{ }[/tex]
Then add your conversion, in this case the molar mass, with the MOLES on the BOTTOM, so they are diagnol with the 1 mol of Au
[tex]\frac{1 mol Au}{ } *\frac{196.7 g Au}{1 mol}[/tex]
Always have the top right in your dimensional analysis be in the units that you are solving for. In this case, we went from moles to grams, so grams is in the top right.
Hope this helps!
Also, 6.02 x 10²³ is otherwise known as avogadros number- it is used when you are converting something from moles to molecules (or particles). For example, if instead we were going from moles of gold to molecules of gold, our dimensional analysis would look like this:
[tex]\frac{1 mol Au}{ } *\frac{6.02 x 10^2^3 molecules Au}{1 mol}[/tex]
Would any Chemistry braniacs be kind enough to help explain how to work these out? Any help is appreciated, thanks
Answer:
NO.3) Mass of Al2O3 formed = 229.5g
Whic statements explain why rocks weather at different rates? Check all that apply
Explanation:
Weathering occurs one of three ways: through physical processes such as freezing and thawing, because of live organisms whose roots break rocks or through chemical processes that occur when carbon dioxide in the soil and air and mixes with water and specific minerals in rocks to form a weak acid that reduces rocks into silt, soil and sediment.
Chemical weathering typically increases as temperatures rise and rain falls, which means rocks in hot and wet climates experience faster rates of chemical weathering than do rocks in cold, dry climates.
Read all above and you may just find your answer!According to Le Chatelier’s principle, which statement is true?
The equilibrium constant is unchanged by temperature changes.
The equilibrium constant changes with a change in temperature.
The equilibrium constant increases with the concentration of reactants.
The equilibrium constant decreases with the concentration of products.
As per Le Cha-tel-ier’s principle, the true statement should be option b. The equilibrium constant changes with a change in temperature.
What is Le Cha-tel-ier’s principle?It defined that if there is any changes in the temperature, pressure, volume, or concentration of a system so it should be leads into the opposing changes in the system for accomplishing a new equilibrium state.
Hence, we can conclude that As per Le Cha-tel-ier’s principle, the true statement should be option b. The equilibrium constant changes with a change in temperature.
Learn more about equilibrium here: https://brainly.com/question/24207087
Answer:
b
Explanation:
Is cobalt magnetic? pls help
Answer:
no it is not
Explanation:
Subject: Chemistry
whoever answers right will give the brainliest.
Answer:
2 A i covalent bond in hydrogen peroxide
ii ionic bond in potassium nitride
iii covalent bond in Aluminum sulphide
2 B i ionic bond in Fe3N2
ii covalent bond in C3F5
iii Ionic bond in Ca3P2
2c roman numerals represent oxidation state of that element.
Explanation:
Aides in the burning of materials. Needed for humans to breathe.
Answer:
Oxygen.
Explanation:
Oxygen is a chemical element that aides in the burning of materials and it is needed for humans to breathe.
Cellular respiration can be defined as a series of metabolic reactions that typically occur in cells so as to produce energy in the form of adenosine triphosphate (ATP). During cellular respiration, high energy intermediates are created that can then be oxidized to make adenosine triphosphate (ATP). Therefore, the intermediary products are produced at the glycolysis and citric acid cycle stage through the breathing of oxygen used to obtain energy from the food ingested.
Hence, all cells in living organisms require oxygen and glucose to release energy.
Weather can change from day to day, but does not
A. the Earth
B. climate
C. ali
D. the atmosphere
ANSWER climate
EXPLANATION climate is change in the weather pattern of a particular area for a longer period of time usually for a month or even year
Answer:
The answer is B: Climate
Explanation:
Just took the test
Na3(PO4) + HCl yields NaCl + H3(PO4)
Chemical Equation Balancer
What is different about the position of that letter if an acid starts with a C?
Answer:
i think it's will difference from compund to compund
Please Help!
Which change takes place at the freezing point of a substance?
Group of answer choices
A. A gas becomes a liquid
B. A solid becomes a gas
C. A liquid become a solid
D. A gas becomes a solid
please also give me an explanation since I do not understand this.
Answer:
❤C. A liquad becomes a solid❤
Explanation:
✌When you freeze water its a scientific fact that it becomes solid.✌
how do you separate immiscible and miscible liquid
Answer:
A mixture of immiscible liquids is separated by using an apparatus called separating funnel. (i) Separation by fractional distillation : Fractional distillation is the process of separating two (or more) miscible liquids by distillation, the distillate being collected in fractions boiling at different temperatures.
Explanation:
hope this sorta helps you -.-
What are the two ways ocean acidification affects marine life?
Answer:
1) harm life forms that rely on carbonate-based shells and skeletons, 2) harm organisms sensitive to acidity
Explanation:
Answer:
Ocean acidification can negatively affect marine life, causing organisms' shells and skeletons made from calcium carbonate to dissolve.
Explanation:the more acidic the ocean, the faster the shells dissolve.
What is the minimum number of kiloJoules needed to change 40.0 grams of water at 100C to steam at the same temperature and pressure
Answer:
90.4Kg
Explanation:
The energy required= latent heat of vaporization
Latent heat of vaporization of water= 2260 KJ/Kg
Mass of water = 0.04 Kg
Heat required= 0.04Kg× 2260 KJ/Kg
Heat required= 90.4Kg
Answer: The minimum number of kilo Joules needed is 90.4KJ.
Explanation:
The energy required= latent heat of vaporization.
Latent heat of vaporization of water= 2260 KJ/Kg
Mass of water = 0.04 Kg
Heat required= 0.04Kg× 2260 KJ/Kg
Heat required= 90.4KJ.
Learn more: https://brainly.com/question/2477358
What explanation can you give to explain the cartoon below. You need to use 5 of the terms listed below correctly in your explanation.
*Ionic Bond
*Ions
*Cation
*Anion
*Ionic Compound
*Monatomic Ion
*Electrostatic Forces
*Salts
*Metals
*Nonmetals
*Polyatomic Ion
Answer:
*Ions
*Cation
*Anion
*Monoatomic ion
*Electrostatic forces
How many moles of oxygen are required to produce 37.15 g CO2? 37.15 g CO2 = mol O2
Answer:
0.84 moles of oxygen are required.
Explanation:
Given data:
Mass of CO₂ produced = 37.15 g
Number of moles of oxygen = ?
Solution:
Chemical equation:
C + O₂ → CO₂
Number of moles of CO₂:
Number of moles = mass/molar mass
Number of moles = 37.15 g/ 44 g/mol
Number of moles = 0.84 mol
Now we will compare the moles of oxygen and carbon dioxide.
CO₂ : O₂
1 : 1
0.84 : 0.84
0.84 moles of oxygen are required.
wich type of matter is always made up of only one kind of atom
Answer:
what is this for?
Explanation:
Answer:
Elements
Explanation:
"Elements are substances, forms of matter and gasses that are made up of only one type of atom."
Panico. (2012, September). The Atomic Model and Matter. Retrieved December 15, 2020, from https://odysseyk12.org/hs/teachers/panico/pdf/atoms/atoms.html
Which of the following is a possible compound formed from Ca2+ and NO3-1?
F Ca2NO3
G Ca(NO3)2
H Ca3NO2
J CaNO
Answer:
Ca(NO3)2
.................
Ca(NO3)2 is a possible compound formed from Ca²+ and NO3-¹.
Ions, which are charged atoms of elements come together to form ionic compounds. A positively charged ion called cation reacts with a negatively charged ion called anion to form a neutral ionic compound i.e. compound with a charge of 0. In this question, cation Ca²+ reacts with anion NO3-. The ionic compound formed must have a net charge of 0. This can only happen if 2 moles of NO3- and 1 mole of Ca²+ is present in the compound. The resulting ionic compound can be chemically represented as Ca(NO3)2. Therefore, Ca(NO3)2 is a possible compound formed from Ca²+ and NO3-¹.Learn more at: https://brainly.com/question/11148793?referrer=searchResults
c) Ammonia is added to copper sulphate solution till excess?
Question 9 of 10
Which of the following is the best definition of a chemical change?
A. A change in a substance where a phase change occurs
B. A change in a substance where one or more new substances form
C. A change in a substance where no new substance forms
O D. A change in a substance where energy is conserved
SUBMIT
th
Answer:
B
Explanation:
a chemical change is where two chemicals come in to create a new chemical
Answer:
A change in a substance with no new substances being formed
Explanation:
you're welcome
What does the 16 mean in the isotopes carbon 16
Answer:
Carbon 16
Explanation:
Isotope of nitrogen
Using the information below calculate the area of a triangle. base = 5 meters height = 10 meters
1.) 25 square meters
2.) 5 square meters
3.)25 meters O 5 meters
The area of a triangle : 25 m²
Further explanationGiven
A triangle. base(B) = 5 meters height(H) = 10 meters
Required
The area
Solution
The area of triangle can be formulated :
[tex]\tt A(area)=\dfrac{1}{2}\times base\times height[/tex]
Input the value :
[tex]\tt A=\dfrac{1}{2}\times 5\times 10\\\\A=25~m^2[/tex]
someone help me plz :))) brainliest
Answer:
Option 2
Explanation:
Please help I’ll give you guys brainiest!
Thank youuuuuuu :))
Answer:
I think it's unbalanced
(I'm so sorry if it's wrong)
Hope this helps!
Answer:
unbalanced
Explanation:
How do secretions of apocrine glands differ from those of the eccrine sweat glands
SOMEONE PLEASE HELP QUICKLY
determine the number of charged particles in nucleus of calcium atom then deduce the number of electrons
NUCLEAR CHARGE (20+)
ATOMIC MASS (40 amu)
given the relative charge of a proton =1+\ m1nucleon=1amu
Answer:
detail is given below.
Explanation:
The charged particles of nucleus are protons while neutrons are neutral having no charge.
We know that an atom consist of electrons, protons and neutrons. Neutrons and protons are present inside the nucleus while electrons are present out side the nucleus. Electron has a negative charge and is written as e⁻. The mass of electron is 9.10938356×10⁻³¹ Kg . While mass of proton and neutron is 1.672623×10⁻²⁷Kg and 1.674929×10⁻²⁷ Kg respectively.
Symbol of proton= P⁺
Symbol of neutron= n⁰
The number of electron or number of protons are called atomic number while mass number of an atom is sum of protons and neutrons.
one proton contribute 1 amu to the total weight. There are 20 protons and 20 neutrons in Ca thus its atomic mass is 40 amu.
While the atomic number is 20.