Which is the correct order of ease of carbon dioxide production by heating the group II metal carbonates?
A) [tex]BaCO_{3} > SrCO_{3} > CaCO_{3} > MgCO_{3}[/tex]
B) [tex]MgCO_{3} > CaCO_{3} > SrCO_{3} > BaCO_{3}[/tex]
C) [tex]CaCO_{3} > MgCO_{3} > BaCO_{3} > SrCO_{3}[/tex]
D) [tex]SrCO_{3} > BaCO_{3} > CaCO_{3} > MgCO_{3}[/tex]
Answer:
Explanation:
The correct option is A:
[tex]BaCO_{3} > SrCO_{3} > CaCO_{3} > MgCO_{3}[/tex]
On the periodic table, carbonates required stronger heating as one does down the groupings in order for them to decompose. The implication is that the stability of compounds will increase from [tex]MgCO_{3}[/tex] to [tex]BaCO_{3}[/tex] .
So the carbonates will be stable according to the following order:
[tex]BaCO_{3} > SrCO_{3} > CaCO_{3} > MgCO_{3}[/tex], thus making B the correct answer.
Cheers
The pH and pOH scales represent concentrations of [H3O+] and [OH−], respectively. What are the hydronium ion concentration and the hydroxide ion concentration of pure water at 25 °C?
Answer:n
Explanation:
Use the masses of the elements below to calculate the mass of 8.70 moles of H3M (the number at the bottom of
each square is the atomic mass of that element)
1
2
3
4
5
6
A
H
C
B
M
Sm
aragon
hillsdale
capuchino
mills
burlingame
san mateo
1.10
3.50
7.09
11.22
15.23
18.98
Given:
Wanted
Relationship: 1 mole H3M =
grams
Final answer
grams
yes use the masses of an element below calculate the mass of it 8.70 mole of each 3M
science helpppppppppppppppppppppppppppppppp
Answer: it should be 80g
Explanation:
What pressure, in atm, would be equal to 798 mmHg?
Answer:
1.05 atm
It should be 1 atm = 760 mm; therefore, 798 mm x (1 atm/760) = about 1.05 atm.
The value of pressure in atm that would be equal to 798 mmHg is 1.05 atmospheric.
What is pressure?Pressure is a physical quantity or a kind of force which is perpendicularly applied on the surface area of any object so that force is equally distributed on that surface.
Pressure will be maesured by various unit and have relation with one another.
As we know that, 1 atm = 760 mmHg
Or 1 mmHg = 1/760atm
Given quantity of pressure is 798 mmHg and we calculate this quantity by multiply this value by 1/760 and we get,
798 mmHg = 798mmHg × 1/760atm/mmHg = 1.05 atm
Hence required value of pressure is 1.05 atm.
To know more about pressure units, visit the below link:
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You mix 35mL of 0.54M NaI with 14mL of 0.84M Pb(NO3)2. How many grams of the precipitate will be created?
If a chemist dilutes 2L of 0.700M solution to 3 L what will be the new concentration (M)?
Answer:
0.233M
Explanation:
M1 = 0.700M
V1 = 2L
V2 = 3L
M2 = ?
M1V1 = M2V2
(0.700)(2) = M2(3)
M2 = 0.233M
What other small steps can we take to save water ?
Answer:
Check your toilet for leaks. ...
Stop using your toilet as an ashtray or wastebasket. ...
Put a plastic bottle in your toilet tank. ...
Take shorter showers. ...
Install water-saving shower heads or flow restrictors. ...
Take baths. ...
Turn off the water while brushing your teeth. ...
Turn off the water while shaving.
Explanation:
Answer:
keeping the water clean
Explanation:
avoid dumping rubish in the water
What is something YOU can do Today to help preserve our Mother Earth??
Answer:
I would recycle, reuse, and reduce the litter on this already hurt Earth.
Explanation:
Answer:
I can go out and help pick up garbage and i can recycle and not litter and i can reuse all the plastic water bottles i drink.
Explanation:
Im glad you care about mother earth to
what 3 things does cell division allow cells to do?
(there r no answer choices)
Answer:
Cell division is central to organism growth, reproduction and tissue repair.
Explanation:
Hope this helps!
Answer:
multiply, survive grow
How many grams of KBr is required to prepare 100 mL of
2.0 M KBr solution?
Answer:
23.8g
Explanation :
Convert 2.0M into mol using mol= concentration x volume
2.0M x 0.1L (convert 100mL to L since the units for M is mol/L)
= 0.2 mol
We can now find grams by using the molar mass of KBr
=119.023 g/mol (Found online) webqc.org
but can be be calculated by using the molecular weight of K and Br found on the periodic table
We can now calculate the grams by using grams=mol x molar mass
119.023g/mol x 0.2mol
= 23.8046 g
=23.8g (rounded to 1decimal place)
how to find resistance of a color code with 4 rings?
Answer:
its yellow
Explanation:
it's a constant law .... much explanation
from 0 to 9
we have
black .o
brown 1
red 2
orange 3
yellow 4
green 5
blue 6
violet 7
grey 8
white 9
Scientist have genetically altered a common virus so that it can Destroy the most lethal type of brain tumor without harming the healthy tissue nearby this technology is used for all expect
Answer:
The correct answer is - discovering or diagnosing the disease.
Explanation:
According to the question, this technology includes genetically modifying a common virus in order to destroy or kill the deadly brain tumor without affecting normal cells around the tumor, this technique is genetic engineering.
This technique can help in treating or curing the disease by killing the tumor cells and make them non-lethal. It can also prevent the tumor cells to grow and make them controlled. There is nothing mention related to diagnosing the disease in the question and it is not possible to find this tumor with help of such a technique.
Thank you!!! ;0;
3.00 moles of ammonia are originally put into a 1.00-liter container and allowed to decompose (no other chemicals present). At equilibrium, 0.600 moles of ammonia remained in the reaction vessel. What would be the equilibrium constant (K) for this reaction?
2 NH3(g) N2(g) + 3 H2(g(
Answer:
Kc ≅ 100 (1 sig. fig.)
Explanation:
2NH₃(g) ⇄ N₂(g) + 3H₂(g)
C(i) 3.00 mol/L 0 0
ΔC -2x +x +3x
C(eq) 0.600 mol/L x 3x
3.00 - 2x = 0.600 => x = 3.00 - 0.600/2 = 1.2 mole/L
At equilibrium Kc = [N₂][H₂]³/[NH₃]² = (x)(3x)³/(3·1.2)² = (1.2)(3.6)³/(0.600)² = 155.52 (calculator)
Rounds to 1 sig. fig. based on given 3.00 moles NH₃(g)' Kc ≅ 100.
How many electrons can be described by the quantum numbers n = 2,1 – 3?
Answer:
a maximum number of 10 electrons can share
Explanation:
How many electrons in an atom can have quantum numbers of N 3 and ML 2?
Therefore, a maximum number of 10 electrons can share these two quantum numbers in an atom.
pleeeassee
Carbon has unique bonding characteristics that allow it to
A
form ionic bonds with any atom to form many different molecules.
B
resist bonding with other atoms and remain a pure element.
C
form chains or rings by bonding to itself and other atoms.
D
form ionic salts that make up half of the known salts on Earth.
What volume will 1000 grams of nitrogen dioxide occupy at 380 mmHg at 0°C
0.69(78)Explanation:
What bonds might form in a carbon atom with sp2 hybrid orbitals?
O A. four single bonds
OB. a double bond and two single bonds
O c. a triple bond and a double bond
OD. a triple bond and a single bond
Rayden is taking a Life science course in absence of Ms. Leesa and tells the students that Organelle X is where genetic information is stored.
Answer: good for him
Explanation: jk
its the dna which is in the NUCLEAS which is probably the answer
GOOD LUCK
Determine the AMOUNT OF NO2, LIMITING REACTANT, AND THE AMOUNT AND NAME OF EXCESS REACTANT.
10.00 g of O2 reacts with 20.00 g NO
The molar masses of O2, NO, and NO2 are 32.00 g/mol, 30.01 g/mol, and 46.01 g/mol, respectively
Answer:
balanced equation mole ratio 5 2 mol NO/1 mol O2
10.00 g O2 3 1 mol O2/32.00 g O2 5 0.3125 mol O2
20.00 g NO 3 1 mol NO/30.01 g NO 5 0.6664 mol NO
actual mole ratio 5 0.6664 mol NO/0.3125 mol O2 5 2.132 mol NO/1.000 mol O2
Because the actual mole ratio of NO:O2 is larger than the balanced equation mole
ratio of NO:O2, there is an excess of NO; O2 is the limiting reactant.
Mass of NO used 5 0.3125 mol O2 3 2 mol NO/1 mol O2 5 0.6250 mol NO
0.6250 mol NO 3 30.01 g NO/1 mol NO 5 18.76 g NO
Mass of NO2 produced 5 0.6250 mol NO2 3 46.01 g NO2/1 mol NO2 5 28.76 g NO2
Excess NO 5 20.00 g NO 2 18.76 g NO 5 1.24 g N
Explanation:
Richard wrote a list of the advantages of using any one of the six simple machines. His list is below. Which statement about simple machines is not correct?
A.
Some simple machines produce an output force greater than the input force.
B.
Some simple machines produce an output force in a different direction than the input force.
C.
Some simple machines have a work output greater than the work input.
D.
Some simple machines increase the distance through which a force is applied.
Plss say just A,b,c, or d :/
Answer:
c
Explanation:
just took the test 100 on it the test is simple machines
A functional group is a specific arrangement of atoms in an organic compound that is acmpavle if characteristic reactions
Is this True or false
Does not having the word (chemical )before reactions make it false
Please help i would appreciate it
Explanation:
(a) a functional group is a special group of atoms or bonds in a compound that is responsible for the chemical reactions, behavior, and characteristics of that compound. (b) Functional group is present in both the compound is alcohol (-OH).
Functional groups are specific groupings of atoms within molecules that have their own characteristic properties, regardless of the other atoms present in a molecule. Common examples are alcohols, amines, carboxylic acids, ketones, and ethers.
Key Points
Functional groups are often used to “functionalize” a compound, affording it different physical and chemical properties than it would have in its original form.
Functional groups will undergo the same type of reactions regardless of the compound of which they are a part; however, the presence of certain functional groups within close proximity can limit reactivity.
Functional groups can be used to distinguish similar compounds from each other.
Key Terms
functional group: A specific grouping of elements that is characteristic of a class of compounds, and determines some properties and reactions of that class.
functionalization: Addition of specific functional groups to afford the compound new, desirable properties.
Please help me with this chem question. Only answer if you know it.
Answer:
solid=(s)
Explanation:
A solubility table may be something your class may want you to memorize. Where an aqueous (aq) solution is formed by a soluble compound dissolving in water, our solvent. So if we refer to this solubility table, it says phosphate (PO4) is usually insoluble, so in the reaction it won't break down in water and will stay as a solid (s). The only exceptions are group 1 alkali metals or ammonium (NH4+).
A gas has a pressure of 500.0 Torr at 35.0 °C. What is the temperature at
standard pressure?
Answer:
466.65 K
Explanation:
Using the formula of Pressure law,
P/T = P'/T'.................... Equation 1
Where P = Intial pressure of gas, T = Initial temperature of gas, P' = Final pressure of gas, T' = Final temperature of gas.
make T' The subeject of equation 1
T' = (P'T)/P................... Equation 2
From the question,
Given: P = 500 Torr = (500×133.322) N/m² = 66661 N/m², T = 35°C = (35+273) = 308 K, P' = 101000 N/m²( Standard pressure)
Substitute these values into equation 2
T' = (101000×308)/66661
T' = 466.65 K
What’s an easy way to learn to convert metric numbers? Help plz
Explanation:
HOPE IT HELPS
THANKS
How many grams of carbon dioxide are produced when 255 grams of octane (C3H18) combust?
Answer:
787.3 g of CO₂
Explanation:
The combustion of octane is this one:
2C₈H₁₈ + 25O₂ → 16CO₂ + 18H₂O
2 moles of octane react to 25 moles of oxygen in order to produce 16 moles of CO₂ and 18 moles of water.
The products in combustion reactions are always CO₂ and H₂O. The oxygen is always a reactant.
We convert mass to moles: 255 g . 1mol /114g = 2.24 moles
2 moles of C₈H₁₈ can produce 16 moles of CO₂
Then, 2.24 moles may produce (2.24 . 16)/2 = 17.9 moles of CO₂
We convert moles to mass:
17.9 mol . 44g/mol = 787.3 g of CO₂
Use the scenario to answer the following question.
A group of students working in a chemistry lab is planning a procedure to neutralize 25.0mL of 2.0 M hydrochloric acid (strong acid) with 1.0 M potassium hydroxide (strong base). In their procedure they plan on adding an equal volume of the base to the acid.
What would be the expected outcome of carrying out this step as planned?
A.
The resulting pH will be equal to 7 because a strong base will neutralize a strong acid.
B.
The resulting pH will be less than 7 because potassium hydroxide is less concentrated than the hydrochloric acid.
C.
The resulting pH will be greater than 7 because potassium hydroxide is less concentrated than the hydrochloric acid.
D.
The resulting pH will not be able to be determined because the concentrations of the acid and base are not the same.
The expected outcome of carrying out this step as planned is :
B. The resulting pH will be less than 7 because potassium hydroxide is less concentrated than the hydrochloric acid.
Acid and basesThe expected outcome of carrying out this step as planned is the resulting pH will be less than 7 because potassium hydroxide is less concentrated than the hydrochloric acid.
pH may be a degree of how acidic/basic water is.
The run goes from - 14, with 7 being unbiased. pHs of less than 7 demonstrate causticity, while a pH of more noteworthy than 7 demonstrates a base.
pH is truly a degree of the relative amount of free hydrogen and hydroxyl particles within the water
Thus, the correct answer is B.
Learn more about "Acids":
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What is the role of Cl2 in the following
reaction?
CL + NaOH Nacl+ NaCO3+H2O
Answer:
Cl2 acts as an oxidizing agent
Explanation:
The balanced equation is
Cl2+NaOH⟶NaCl+NaClO3+H2O
Cl2 acts as a reactant in this chemical reaction
Cl2 receives one electron and thus reduces itself from Cl2 to 2 Cl−. This indicates that 2Cl- will oxidize some other element and hence Cl2 act as an oxidizing agent.
How long does cream of tartar activate
What is the molar mass of CH 4 ? (C = 12.01g / m * o * l, H = 1.008g / m * o * l)
Fe + O2 —> Fe2O3
can someone pls help me balance this??
Answer:
4Fe + 3O2 → 2Fe2O3