Answer:
The answer to this question is A.
hope it helps :)
Write a net ionic equation for the reaction that occurs when magnesium carbonate (s) and excess hydrochloric acid (aq) are combined.
Answer:
2HBr(aq) + MgS(s) → MgBr2(aq) + H2S(g)
excess
Sulfide ion in solution exists as HS-. Adding additional H+ forces it to H2S gas.
H2S(g) <=> H+(aq) + HS-(aq)
A complete ionic equation also contains the spectator ions, whereas a net ionic equation just displays the chemical species that are involved in a reaction. when MgCO₃ (s) and excess HCl (aq) are combined, the equation becomes MgCO₃ (s) + 2H⁺ (aq) → Mg²⁺ (aq) + H₂O (l) + CO₂ (g).
The chemical species that change chemically are identified by the net ionic equation. The ions that show up on both sides of the equation are stable and are therefore referred to be spectator ions.
Spectator ions are ions that are present on both sides of chemical reactions but do not take part in the reaction itself. The spectator ions on both sides of the equation are canceled in the net chemical reaction.
The complete ionic equation is:
MgCO₃ (s) + 2H⁺ (aq) + 2Cl⁻ (aq) → Mg²⁺ (aq) + 2Cl⁻ (aq) + H₂O (l) + CO₂ (g)
The net ionic equation is:
MgCO₃ (s) + 2H⁺ (aq) → Mg²⁺ (aq) + H₂O (l) + CO₂ (g)
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what conditions does bacteria need to grow in yogurt?
Calculate the grams of C6H6 needed to produce 25 g of CO2
Show your work
Answer:
The given reaction is a combustion reaction of benzene,
C
6
H
6
. From its balanced chemical equation,
2
C
6
H
6
+
15
O
2
→
12
C
O
2
+
6
H
2
O
,
the mass of carbon dioxide
(
C
O
2
)
produced from 20 grams (g) of
C
6
H
6
is determined through the molar mass of the two compounds, given by,
M
M
C
O
2
=
44.01
g
/
m
o
l
M
M
C
6
H
6
=
78.11
g
/
m
o
l
and their mole ratio:
12
m
o
l
C
O
2
2
m
o
l
C
6
H
6
→
6
m
o
l
C
O
2
1
m
o
l
C
6
H
6
With this,
m
a
s
s
o
f
C
O
2
=
(
20
g
C
6
H
6
)
(
1
m
o
l
C
6
H
6
78.11
g
C
6
H
6
)
(
6
m
o
l
C
O
2
1
m
o
l
C
6
H
6
)
(
44.01
g
C
O
2
1
m
o
l
C
O
2
)
=
(
20
)
(
6
)
(
44.01
)
g
C
O
2
78.11
=
5281.2
g
C
O
2
78.11
m
a
s
s
o
f
C
O
2
=
67.6
g
C
O
2
Therefore, the mass in grams of
C
O
2
formed from 20 grams of
C
6
H
6
is
67.6
g
C
O
2
.
it is a problem of app
The grams of C₆H₆ needed to produce 25 g of CO₂ are 7.38g.
What is Mole concept?Avogadro's number is the number of units in one mole of any substance and equals to 6.02214076 × 10²³. The units can be electrons, atoms, ions, or molecules.
No. of moles is defined as a particular no. of particles that we can calculate with the help of Avogadro’s number.
Mass of a particular product is also find out by stoichiometry of a reaction as per the no. of mole given in the reaction.
Given,
Mass of CO₂ = 25g
2C₆H₆ + 15O₂ → 12CO₂ + 6H₂O
As per reaction, 156g of C₆H₆ gives - 528g of CO₂
0.295g of C₆H₆ gives - 1g of CO₂
0.295 × 25 g of C₆H₆ gives - 25g of CO₂ = 7.38g C₆H₆
Therefore, The grams of C₆H₆ needed to produce 25 g of CO₂ are 7.38g.
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.
...............................
Answer:
F is correct
Explanation:
When an atom or group of atoms" has more protons than electrons",it is positively charged. An atom or group of atoms that has the same number of protons and electrons is neutrally charged.
Answer: If an object that has an excess of positive electrons it is a positively charged object.
An atom that gains electrons is called a(n) _________.
A. isotope
B. magnet
C. None of these
D. negative ion
negative ion or anion
hope it helps...!!!
Answer:
C. None of these
Explanation:
3.Using Balanced Equations: C5H12+802–5CO2+6H20
A. If you have 358.4 Liters of O2 gas then what's the volume of CO2
b. If you have 360 grams of C5H12 then what's the mass of H2O
Answer:
i think b is the answer hope this helps:))
When salt is added to water, what happens to the molecules?
The water molecules remain together. The salt molecules break apart.
Water and salt molecules remain together.
The water molecules break apart. The salt molecules remain together.
Water and salt molecules break apart.
Answer:
The the salt dissolves
Explanation:
The salt dissolves because the covalent bonds of water are stronger than the ionic bonds in the salt molecules.
the forces that keep liquid particles together are called _____ forces of attraction
Answer:
The forces that keep liquid particles together are called intermolecular forces of attraction.
If an atom such as hydrogen is able to form a covalent bond describe what happens when the electron shells of two atoms overlap
Answer:
they share electrons to complete eachothers outer shell
Explanation:
Which of the following is an ionic compound?
A. N2O B. CO C. HCL D. Na2O
Answer:
D. Na2O
Because we already know that sodium oxide is a binary ionic compound because it contains one metal cation and one non-metal anion.
Answer:
D. Na2O
Explanation:
Sodium oxide (Na2O) is an ionic compound. Its constituent atoms are, respectively, a metal and a non-metal.
Sodium (Na), as a metal, will attempt to lose electrons to reach an octet state. Oxygen (O2), as a non-metal, will attempt to gain electrons to reach an octet state.
:-befrank
what is this difference between a Mm and a mm? which is larger one Mm or one mm
Which characteristic do all owl families share? A.) small eyes B.) large body size C.) nighttime hunting D.) heart-shaped faces
Need this answer in 5 MINUTES!
If any turtors are out there I need a Verified answer
Heart-shaped faces is the characteristic all owl families share and it is denoted as option D.
What is an Owl?
This is a type of bird which is known for its heart shaped face, big round eyes and reversible toe.
This animal has majority of its species as night time hunters which is why option D was chosen.
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The Molar mass of silicon is 28.09 grams/mole
Calculate the number of atoms in a 92.8 mg sample of silicon
Write your answer in scientific notation using three significant figures
The picture compound has which Bond
hard water contains calcium and magnesium ions. one way to soften water is to add sodium phosphate. Write complete and net ionic equations for the reaction of these two alkaline earth metals with aqueous sodium phosphate
Explanation:
The photo is the net ionic equation for the Calcium ions
The net ionic equation for the reaction is [tex]3Ca^{+2} + 2PO^{-3}_2----- > Ca_3(PO_4)_2[/tex]
What is chemical reaction?A chemical reaction is the chemical transformation of one set of chemical substances into another.
When chemical bonds between the atoms are formed or broken, chemical reactions occur.
The substances that initiate a chemical reaction are known as reactants, and the substances that result from the reaction are known as products.
Plants grow, start producing fruit, and decompose to become compost for new plants through chemical reactions.
The reaction for the given scenario is,
[tex]3Ca^{+2} + 2PO^{-3}_2----- > Ca_3(PO_4)_2[/tex]
Thus, above mentioned is the chemical reaction.
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.
A species is a group of organisms that closely resemble each other in physical appearance and behavior and can mate and produce young that can also mate and produce young. True or false?
false
true
Answer:
True
Explanation:
It's a true statement
Answer:
True
Explanation:
A species is a group of similar organisms that can breed with one another to produce fertile offspring. For example, humans are one species and dogs are another species. Individuals of the same species can reproduce to make more individuals of the same species.
What are the three main groups of macronutrients? (select three please)
minerals
proteins
fats
carboydrates
Answer:
protein, carbs, and fats.
Explanation:
Those are the three main sources of macronutrients.
(this isn't a chemistry, it's health)
Answer:
fats, carbohydrates and proteins
Explanation:
I don't know, I answered that on my test and it was correct
Example 2- If a weather balloon initially has a volume of 25000mL, but then rises up in the air and its new
pressure is 5atm, and its new volume is 15L, what was its initial pressure?
pressure
Binder
Answer:
3 ATM = INITIAL PRESSURE
Explanation:
P1V1 = P2V2
P1 * 25 = 5 * 15
P1 = 3 ATM
_______________________ yield is another name for actual yield
The second name that can be used to describe actual yield is Theoretical yield is another name for the actual yield
What is actual YieldThe actual yield is the amount of product obtained from a chemical reaction and it is lesser or equal to the theoretical yield ( the amount of product that can be obtained from a reaction when all reactants are converted ).
Hence we can conclude that theoretical yield is another name for the actual yield.
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what would you expect to happen if you put a red blood cell in a glass pure water distilled water g
What happens to a positively charged ion during a chemical change?
Answer:
Positively charged ions move to the negative electrode during electrolysis
Explanation:
Electrolysis is the process by which electric current is passed through a substance to effect a chemical change
I hope I was able to help
Engineers design computers to cool down quickly so they do not break. What happens to the molecules in a computer when the temperature of the computer decreases?
Answer:The energy of the molecules in the computer decreases.
Explanation:LET ME KNO IM WRONG
Answer: The energy of the molecules decrease in the computer
Explanation:
This is because you turned off the computer cooling it down and slowing the molecules.
What is h+ concentrate in a solution with a pH of 1.25 round to nearest hundredth
Answer:
0.0562
Explanation:
Ph=-log[H+]
to find the h+ is the antilogarithm of the Ph.
Which is 10 raised to the power - Ph.
Answer:
5.62
-2
Explanation:
What is the H+ concentration in a solution with a pH of 1.25? Round to the nearest hundredth.
5.62 × 10n M n= -2
Between 1988 and 2019, the pH of the ocean hasQuestion 2 options:
decreased by 0.5 pH units.
decreased by 20 pH units.
increased by 0.25 pH units.
decreased by 0.05 pH units.
Answer:
Below
Explanation:
The ocean is becoming more acid, which means the pH is decreasing. In that time frame it has decreased by about 0.05
Determine the mass of the following samples
3 moles of Mg
4.2 moles of NaCI
Answer:
See below
Explanation:
From periodic chart
Mg = 24.305 gm per mole
24.305 * 3 = 72.915 gm
Na = 22.989
Cl = 35.45 summed = 58.439 gm per mole
58.439 * 4.2 = 245.4438 gm
What is the volume of 1.758 mole of a gas at standard temperature and pressure
Answer:
39.379 liters
Explanation:
One mole of gas at STP = 22.4 l / mole
22.4 l/mole * 1.758 mole = 39.379 liters
6. How many moles of water would require 92.048 kJ of heat to raise its temperature from 34.0 °C to 100.0 °C? (3 marks)
Taking into account the definition of calorimetry, 0.0185 moles of water are required.
CalorimetryCalorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).
So, the equation that allows to calculate heat exchanges is:
Q = c× m× ΔT
where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.
Mass of water requiredIn this case, you know:
Heat= 92.048 kJMass of water = ?Initial temperature of water= 34 ºCFinal temperature of water= 100 ºCSpecific heat of water = 4.186 [tex]\frac{J}{gC}[/tex]Replacing in the expression to calculate heat exchanges:
92.048 kJ = 4.186 [tex]\frac{J}{gC}[/tex]× m× (100 °C -34 °C)
92.048 kJ = 4.186 [tex]\frac{J}{gC}[/tex]× m× 66 °C
m= 92.048 kJ ÷ (4.186 [tex]\frac{J}{gC}[/tex]× 66 °C)
m= 0.333 grams
Moles of water requiredBeing the molar mass of water 18 [tex]\frac{g}{mole}[/tex], that is, the amount of mass that a substance contains in one mole, the moles of water required can be calculated as:
[tex]amount of moles=0.333 gramsx\frac{1 mole}{18 grams}[/tex]
amount of moles= 0.0185 moles
Finally, 0.0185 moles of water are required.
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use the kinetic theory to explain why a windy day is a good drying day?
Explanation:
Wind helps to get out molecules of water from clothes.
In summer Ball is hard b because due to heat kinetic energy of molecules increases
Use this equation: N2 + 3H2 → 2NH3, for the following problems:
1. If 2.5 moles of N2 react, how many grams of NH3 can be produced?
2. If 10.0 moles of NH3 are produced, how many grams of H2 would be required?
Use this equation: B2O3 + 3Mg → 3MgO + 2B, for the following problems:
3. How many grams of boron can be obtained from 8 moles of B2O3?
4. How many grams of magnesium are required to produce 4 moles of boron?
Use this equation: S8 + 12O2 → 8SO3, for the following problems:
5. How many grams of oxygen is needed to produce 7.5 moles of sulfur trioxide?
6. How many grams of sulfur trioxide can be produced from 2 moles of octasulfur?
Answer:hop this helps
Explanation:
how does the melting point of a substance indicate the strength of its intermolecular force of attraction
Answer:
The molecules are held together by intermolecular force of attraction. More the force the fusion takes after some time only that means the melting point is high. So molecules with greater molecular forces have high melting point and less molecular forces have low melting point.
Answer:
On heating a solid, the kinetic energy of the particle increases. The particle start vibrating with greater speed. The energy supplies by heat overcomes the force of attraction between the particles.
If this force of attraction is more, then more heat energy will be necessary to overcome this force. So, the melting point of the solid will be higher.