The answer would be +208 J.
5) What is the volume of 6.70 x 10^15 molecules of propane, C3 H8 at STP?
The method by which the substances in a mixture are separated is called what?
Answer:
Filtration is a separation method used to separate out pure substances in mixtures comprised of particles some of which are large enough in size to be captured with a porous material.
85. Compare a mole of Ag-108 and a mole of Pt-195 using
atoms, protons, electrons, and neutrons.
Explanation:
1 mol of an atom (irregardless of the element) contains the Avogadro's number of atoms. This is given as;
1 mol = 6.022 * 10^23 atoms
For a neutral atom;
NUmber of protons = Number of electrons
The relationship between proton and neutron is given as;
Mass Number = Protons + Neutrons
Ag-108
Atoms = 6.022 * 10^23 atoms
Protons = Atomic Number = 47
Electrons = 47
Neutrons = Mass Number - Protons = 108 - 47 = 61
Pt-195
Atoms = 6.022 * 10^23 atoms
Protons = Atomic Number = 78
Electrons = 78
Neutrons = Mass Number - Protons = 195 - 78 = 117
What term is used when heat is absorbed by a reaction, thus leaving the surroundings colder
I need help pls...Thanks
Answer:
4. 125°C
Explanation:
I hope this helps you :D
Answer:
Explanation:can you take a pic of it a little up so i can see the h please??
A molecule of glucose is comprised of 6 atoms of carbon, 12 atoms of hydrogen, and 6 atoms of oxygen.
According to the information given above, what is the molecular formula of glucose?
Answer:
C6H12O6 the third choice
According to the given information , the molecular formula or the chemical formula of glucose is C₆H₁₂O₆.
What is chemical formula?Chemical formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols of elements. It also makes use of brackets and subscripts.
Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form is called empirical formula.
It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.
There are four types of chemical formula:
1)empirical formula
2) structural formula
3)condensed formula
4)molecular formula
Learn more about chemical formula,here:
https://brainly.com/question/29031056
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What is the net ionic equation for this reaction?
FeCl3 + 3NaOH → Fe(OH)3 + 3NaCl
Answer:
2.6299
its easy
2 Write a word equation and
a symbol equation for the
reaction of solid zinc oxide
(ZnO) with sulfuric acid.
Answer:
Zinc oxide is react with sulphuric acid to give zinc sulphate and water.
zinc oxide +sulphuric acid ⇒ zinc sulphate + water
Zno +H2So4 ⇒ZnSo4 + H2O
SULPHURIC ACID = H2SO4
ZINC SULPHATE =ZnO
Explanation:
What volume of ammonia (NH3) will react completely with 25.0 liters of O2? 4 NH3 + 3 O2 ---> 2 N2 + 6 H2O
Answer:
18,75 litres
Explanation:
4 NH3 + 3 O2 ---> 2 N2 + 6 H2O
n (NH3) : n (O2) = 4 : 3
<=>
V (NH3) : V (O2) = 4 : 3
Hence, V(O2) = 3 × V (NH3) ÷ 4 litres
V(O2) = 3 × 25.0 ÷ 4 litres
V(O2) = 75 ÷ 4 litres
V(O2) = 18,75 litres
If you have any questions, feel free to ask :)
A behavioral adaptation when an animal becomes inactive in the winter is _____.
A. hibernation
B. camouflage
C. migration
D.sleeping
Answer:
A. hibernation
Answer:
Hibernation.
Explanation:
Cloudy nights are often warmer than clear nights. Why is this so?
The clouds generate wind
The clouds trap heat energy during the daylight hours
The clouds store and release heat from the inner Earth
The clouds release heat generated by the friction of air molecules
Answer: B
Explanation: The clouds act almost like a lid. Think of it like when you put tin foil over food before it goes in the oven. so that even after it is removed from the heat the tin foil traps it causing it to stay warm.
Use the drop-down menus to select the names of the labeled structures.
A:
B:
C
Answer:
A:petal
B:pistil
C:stamen
Explanation:got it right on edu 2021
Answer:
C
A
B
Explanation: on ED about Identifying Earth’s Layers
Please Help with 2. Thanks
describe how an ion is made
A chemistry student measures out 41 grams of sodium hydroxide, NaOH. They react it with an excess of hydrochloric acid, HCl, forming water and sodium chloride, NaCl. After boiling away the water and the HCl, they find the mass of the NaCl to be 25.5 grams. What is their percent yield? (Don't forget to write a balanced equation)
HELP ASAP!!!!
Which statements describe rechargeable batteries? Check all that apply.
Charging rechargeable batteries allows the non-spontaneous reaction within the batteries to proceed.
Charging rechargeable batteries allows the spontaneous reaction within the batteries to proceed.
The rechargeable battery is an example of a voltaic cell.
The rechargeable battery is an example of an electrolytic cell.
Answer: A, C, D
Explanation:
Right on Edge
Answer:
1.) Charging rechargeable batteries allows the non-spontaneous reaction within the batteries to proceed.
3.) The rechargeable battery is an example of a voltaic cell.
4.) The rechargeable battery is an example of an electrolytic cell.
Explanation:
got it right on edge
I need help in this problem for an assignment. Please
Answer:
1) increases
2)increases
3) Decreases
4) increases
5) increase
6) decreases
Explanation:
Let us remember that in a solid, the molecules of the substance are trapped in fixed positions hence the entropy of a solid is less than that of liquid as well as less than the entropy of a gas.
Reaction (1) and (2) deal with a change of state from solid to liquid or gas leading to increase in entropy.
In reaction (3) the aqueous reactants convert into a liquid product leading to a decreases in entropy.
Reaction (4) and (5) has to do with change of a solid to a gas as well as an increase in volume leading to an increase in temperature.
For reaction(6), a solid is formed so entropy decreases
Hello! I have a green pigment called the chlorophyll. I also absorb solar
energy to do the process of photosynthesis. What am I?
Answer:
flower
Explanation:
why is this mars landing a new era for space exploration
Answer: The scientific reasons for going to Mars can be summarised by the search for life, understanding the surface and the planet's evolution, and preparing for future human exploration. Understanding whether life existed elsewhere in the Universe beyond Earth is a fundamental question of humankind.
Explanation:
What is the function of the Intercostal Muscle
Answer:
The intercostal muscles also stabilize the chest wall; in full inspiration they contract to prevent the intercostal spaces being sucked inwards by the negative intrathoracic pressure generated by contraction of the diaphragm.
Explanation:
Hope this helps! Brainliest is always appreciated :)
How
many moles of hydrogen gas will form if 0.35 moles of Na reacts with an
excess of water?
Answer:
0.8 moles
Explanation:
2H2+O2 —›2H2O
Since , from given balanced chemical Equation.
2moles of H2 produce 2 moles of Water
So,
2moles H2= 2moles H2O
1moles H2= 1 mole of H2O
For 0.8 mole of H2O, multiply both sides by 0.8
0.8 H2=0.8 H2O
0.8 mole of H2= 0.8 mole H2O
So answer is 0.8 moles
How many grams of oxygen are in 4.50x10^25 formula units of potassium sulfate?
Potassium Sulfate = K2SO4 = 174.252 g/mol
K2 = 78.196 g/mol
S = 32.06 g/mol
O4 = 63.996 g/mol
Answer:
4777.09grams
Explanation:
To find the mass of oxygen, we first need to find the mass of potassium sulfate (K2SO4).
Since there are 4.50 x 10^25 formula units of potassium sulfate, we can find the number of moles in K2SO4 by dividing by Avagadros number (6.02 × 10^23 units). That is;
number of moles of K2SO4 (n) = 4.50 x 10^25 ÷ 6.02 × 10^23
= 0.747 × 10^ (25-23)
= 0.747 × 10^2
= 7.47 × 10^1 moles
Mass in grams of K2SO4 can be calculated thus: molar mass of K2SO4 × moles
= 174.252 g/mol × 7.47 × 10^1 moles
= 13016.62grams.
Since mass of oxygen in 1 mol of K2SO4 = O4 = 63.996 g/mol
We find the percentage by mass of oxygen in K2SO4 as follows:
= 63.996/174.252 × 100
= 0.367 × 100
= 36.7% by mass of oxygen.
This means that in 1gram of K2SO4, there are 0.367gram of Oxygen. Hence, in 13016.62grams (4.50 x 10^25 units) of K2SO4, there will be;
0.367 × 13016.62
= 4777.09grams of oxygen.
hey y’all, I’m growing a plant for science class but I need some questions about the plant, can someone please give me atleast 3 questions to answer for it.. can you give me atleast one tricky one
Hurry pls <3
Answer:
What type of plant
Where is it mainly found
What are some facts about it?
how do I out pizza the hut?
Answer:
you get one of their pizzas and then put more toppings on cheese on the pizza
Explanation:
Copper(ii) nitrate was dissolved in water to form an aqueous solution. Aqueous sodium hydroxide formed a light blue precipitate. What is the formula?
Answer:
Cu(OH)₂ ⇒ copper(II) hydroxide
Explanation:
Copper(II) nitrate (Cu(NO₃)₂) dissociates into ions in an aqueous solution to form Cu²⁺ ions and NO₃⁻ (nitrate) ions. If the aqueous solution contains sodium hydroxide (NaOH), which dissociates into Na⁺ and OH⁻ ions, a precipitate is formed from Cu²⁺ and OH⁻ ions. The precipitation reaction is the following:
Cu(NO₃)₂(aq) + 2 NaOH(aq) → Cu(OH)₂(s) + 2 NaNO₃(aq)
The light blue precipitated formed is copper (II) hydroxide (Cu(OH)₂), because it is an insoluble solid product.
_C6H10+_02->_CO2_H20
If 35 grams of cyclohexene(C6H10) and an excess of oxygen(02) combust how many grams of carbon dioxide (CO2) will be formed?
2) if an excess of cyclohexene (C6H10) and 45 grams of oxygen(02) combust how many grams of carbon dioxide(CO2) will be formed?
_C2H302H+_Al(OH)3->Al(C2H302)3+_H20
3)first determine the mass of aluminum acetate Al(C2H302)3 that can be made with 125 grams of acetic acid C2H302H
4)next determine the mass of aluminum acetate Al(C2H302)3 that can be made with 275 grams of aluminum hydroxide Al(OH)3
Answer:
whats the theisis
Explanation:mmm ok
Which row gives the correct order of reactivity of the four metals?
(look at the attached photo)
Answer:
D
Explanation:
Answer:
C) gold - zinc - magnesium - lithium
I need help!
John decided to cycle to his friend’s house at a speed of 20km/h and the journey took 6 hours. How far did John cycle?
Answer:
120 km
Explanation:
If he goes 20km/h and travled for 6 hours then he would have gone 120 km. 20 multiplied by 6
What is the noble gas configuration for zirconium?
Answer:
[Kr] 4d² 5s² option b will be correct answer
Select the correct answer.
What is the chemical name of the covalent compound SF6?
A.
monosulfur hexafluoride
B.
monosulfide hexafluorine
C.
sulfur hexafluoride
D.
hexasulfur fluoride
Answer:
sulfur hexafluoride....
Answer:
c. Sulfur hexafluorideExplanation:
Sulfur hexafluoride (SF6) or sulphur hexafluoride (British spelling), is an extremely potent and persistent greenhouse gas that is primarily utilized as an electrical insulator and arc suppressant. It is inorganic, colorless, odorless, non-flammable, and non-toxic. SF.
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