Answer:
False
Explanation:
Not all of it but some of it. Hope this helps! (ﾉ◕ヮ◕)ﾉ*:･ﾟ✧
Mixing hydrochloric acid (HCl) and aqueous calcium hydroxide produces water and aqueous Calcium Chloride. Write the complete and net ionic equations
Answer:
HCI+Ca(OH)2
Explanation:
evaluate {(7.8)^2-(2.2^2
Answer:
56
Hope this helps :)
True or false atoms are the smallest particle of an element that have that elements properties
Answer:false
Explanation:false
Answer:
true
Explanation:
hoping for the brainliest
Which change to this process would shift the equilibrium to produce the
maximum possible amount of S03?
2502 +02 2503 + energy
A. Increasing the temperature
B. Decreasing the pressure
C. Removing the O2 as it forms
D. Removing the SO3 as it forms
The change which shift the equilibrium to produce the maximum possible amount of SO₃ is decreasing the temperature.
What is equilibrium principle?According to this principle if any external stress is applied in the equilibrium state then equilibrium will shift towards that side where the external stress will decreases.
In the given chemical equation energy is releases in the form of heat, then in this condition:
Increase in temp will shift the reaction towards the reactant side.Decreasing the pressure will also lead to the decrease in the temperature and in this condition reaction will shift towards product side and will increases the amount of SO₃.Removing the oxygen and SO₃ will not help in increasing the amount of SO₃.Hence decreasing the temperature will produce maximum SO₃.
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A vaccine used against an infectious disease may contain
Answer:
Vaccines include a variety of ingredients including antigens, stabilizers, adjuvants, antibiotics, and preservatives. They may also contain residual by-products from the production process.
When sodium chloride and metallic sodium are
each dissolved in water A. both processes are
exothermic B. both processes are endothermic
C. the dissolution of metallic sodium is endothermic
D. the dissolution of metallic sodium is exothermic
E. the dissolution of sodium chloride is explosive
Answer:
B
Explanation:
don't try to do that at home
¿The presence of which atmospheric condition will most likely result in clear skies in Binghamton, New York?
Answer:
Most Likely A High Pressure Center
Explanation:
is most likely high pressure Center because on a weather map over the southern western Pennsylvania there's mostly high pressure over there. The descending air diverges and spreads out from the center and their is a Coriolis effect which causes the Diverging air to rotate in a clockwise direction.
Which of these objects are malleable? Check all that apply
Answer: Options 1,3,6
Glycerophospholipids (phosphoglycerides) are components of cell membranes.
a. True
b. False
Answer:
The correct answer is a. True
Explanation:
The main components of cell membranes are lipids and proteins. Lipids are responsible to form the structural barrier with the surroundings. The general structure of the membrane is made up of phospholipids, which have a part of the molecule with affinity to other lipids, and another part with affinity to water. The most common and abundant phospholipids are glycerophospholipids.
Therefore, the sentence is true.
WBCS are often called soldier of the body why
Answer:
White blood cells are cells of the system, which play a neighborhood in protecting the body against infectious diseases and foreign bodies. These cells flow with the blood throughout the body then scavenge and kill the parasites and foreign bodies. Hence, they are called soldiers of the body.
I hope it's helpful!
What is the result of wave motion on water particles?
A. Water particles barely move forward; they move in a circular pattern.
B. Water particles barely move forward as they move up and down.
C. Water particles are pushed forward as they move up and down.
D. Water particles are pushed down as they move side to side.
Answer:
A. Water particles barely move forward; they move in a circular pattern.
Answer:
For k-12 its:
Explanation:
Water particles barely move forward; they move in a circular pattern.
^^
Suppose that you are performing a titration on a monoprotic acid. Titration of this monoprotic acid required a volume of 0.1L of the base being used. If the same volume of a diprotic acid would instead have been used (same volume of a diprotic acid versus the originally used monoprotic acid), and if we assume furthermore that the concentration of the diprotic acid and the monoprotic acids are equal, how does the volume of base required to reach the endpoint for the diprotic acid compare to the volume of base required to reach the endpoint for the monoprotic acid?
A) More base is likely required to reach the endpoint for the diprotic acid than for the monoprotic acid under these conditionsB) Less base is likely required to reach the endpoint for the diprotic acid than for the monoprotic acid. C) Exactly the same amount of base is required for both monoprotic and diprotic acids under the situations described here.D) A completely different indicator will need to be used here.
Answer: A) More base is likely required to reach the endpoint for the diprotic acid than for the monoprotic acid under these conditions
Explanation:
The monoprotic acid (HA) has a valency of 1 and diprotic acid [tex](H_2A)[/tex] has a valency of 2.
As the concentration and volume of the diprotic acid and the monoprotic acids are equal.
The neutralization reaction for monoprotic acid is:
[tex]HA+BOH\rightarrow BA+H_2O[/tex]
The neutralization reaction for diprotic acid is:
[tex]H_2A+2BOH\rightarrow B_2A+2H_2O[/tex]
Thus more number of moles of base are required for neutralization of diprotic acid and thus the volume required will be more as concentration and volume of the diprotic acid and the monoprotic acids are equal.
Antacids are used to treat acid reflux by neutralizing stomach acid, which is hydrochloric acid. Calcium carbonate, sodium bicarbonate and aluminum hydroxide are common main ingredients found in various brands of antacids. The brand Tums has calcium carbonate as the main ingredient to neutralize stomach acid. Write a balanced equation to show how Tums will neutralize stomach acid, and answer the following questions based on this reaction.
Answer: [tex]CaCO_3+2HCl\rightarrow CaCl_2+H_2O+CO_2[/tex]
Explanation:
Neutralization is a chemical reaction in which acid and base combine to form salt and water. Acids donate[tex]H^+[/tex] and bases donate [tex]OH^-[/tex] in water which combine to form water molecules.
The chemical reaction between calcium carbonate and hydrochloric acid forms calcium chloride , water and carbon dioxide.
The balanced chemical equation is:
[tex]CaCO_3+2HCl\rightarrow CaCl_2+H_2O+CO_2[/tex]
25.0 mL of a 3.25 M solution is diluted to 450.0 mL. What is the concentration of the diluted solution?
Answer:
0.181 M
Explanation:
Begin by finding the total moles by using the volume and molarity given:
[tex]\frac{3.25 mol}{1000 mL} x \frac{25.0 mL}{1} = 0.08125 mol[/tex]
(Remember molarity is mol/L, which is equal to mol/1000 mL.)
Divide the moles by the volume after dilution:
[tex]\frac{0.08125 mol}{450.0 mL} x \frac{1000 mL}{1 L} = \frac{0.181 mol}{L} = 0.181 M[/tex]
The concentration of the diluted solution is 0.181 M.
3. What is the name of the technique used to weigh the unknown liquid in part A of the
experiment?
Answer:
The technique is called weighing by difference
Kingsley then adds 44.12 mL of NaOH to 250.00 mL of the HCOOH solution. The neutralization reaction resulted in 0.091 moles of HCOOH and 0.036 moles of HCOO- left in solution. Determine the pH of the resulting solution.
Answer:
pH = 3.34
Explanation:
We can calculate the pH using Henderson-Hasselbach's equation:
pH = pKa + log[tex]\frac{[HCOO^-]}{[HCOOH]}[/tex]for HCOOH, pKa = 3.75.
We can calculate [HCOO⁻] and [HCOOH] using the given number of moles for each one and the final volume:
Final Volume = 44.12 mL + 250 mL = 294 mL294 mL / 1000 = 0.294 L[HCOO⁻] = 0.036 mol / 0.294 L = 0.122 M[HCOOH] = 0.091 mol / 0.294 L = 0.310 MThen we proceed to calculate the pH:
pH = 3.75 + log[tex]\frac{0.122}{0.310}[/tex]pH = 3.34The pH of the resulting solution is 3.34.
Calculation of the pH of the solution:Since
Final Volume = 44.12 mL + 250 mL = 294 mL
Now
= 294 mL / 1000
= 0.294 L
Now
[HCOO⁻] = 0.036 mol / 0.294 L = 0.122 M
[HCOOH] = 0.091 mol / 0.294 L = 0.310 M
So, the pH should be
= 3.75 + log0.122/0.310
= 3.34
hence, The pH of the resulting solution is 3.34.
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aluminum and hydrochloric acid reaction type
Answer:
redox reaction
Explanation:
:D
Answer:
The reaction between metallic aluminum and hydrochloric acid is what is known as an oxidation-reduction reaction or redox reaction. Both oxidation and reduction take place simultaneously.
"How many grams of CaCl2 would be dissolved in 1.0 L of a 0.10 M solution of CaCl2? "
Answer:
2365 g
Explanation:
The mass of CaCl₂ will be 110.98 grams, this can be calculated by using the molarity formula.
MolarityIt is defined as the ratio of a number of moles of solute to the volume of solution in liters.
It is given by:
M= n/V
What information do we have?
V= 1.0 L
M= 1.0 M
Molar mass of CaCl₂ = 110.98g/mol
To find:
m=?
M= n/V
n= M/V
n= 1 mole
A Number of moles is the ratio of mass over the molar mass.
n = m/ M
1 mole= m / 110.98 g/mol
m= 110.98 grams
Thus, the mass of calcium chloride is 110.98 grams.
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Food is taken in and broken down by the _______ system. The raw materials are then transported throughout the body by the _______ system.
A. nervous; skin
B. respiratory; circulatory
C. digestive; circulatory
D. digestive; skin
Answer:
C. digestive; circulatory
Explanation:
It is the correct answer..
Looking across period 4 of the periodic table, potassium (atomic number 19) is followed by calcium (atomic number 20), which is followed by scandium (atomic number 21). Which element should have the largest atomic radius?
The Heliocentric model is when the sun, planets, and stars are orbiting a stationary Earth.
True or false
What is the skin's natural oil?
a. sweet
b. Melanin
c. sebum
d. vegetable oil
help
Answer:
C. Sebum
Explanation:
C. Sebum
Sodium metal reacts with water to produce hydrogen gas according to the following equation:
2Na(s) + 2H2O(l)2NaOH(aq) + H2(g)
The product gas, H2, is collected over water at a temperature of 25 °C and a pressure of 759 mm Hg. If the wet H2 gas formed occupies a volume of 8.11 L, the number of grams of H2 formed is _______g. The vapor pressure of water is 23.8 mm Hg at 25 °C.
Answer:
0.648 g
Explanation:
Step 1: Write the balanced equation
2 Na(s) + 2 H₂O(l) ⇒ 2 NaOH(aq) + H₂(g)
Step 2: Calculate the partial pressure of H₂
The total pressure (P) is equal to the sum of the partial pressures of hydrogen and water vapor.
P = pH₂O + pH₂
pH₂ = P - pH₂O
pH₂ = 759 mmHg - 23.8 mmHg = 735 mmHg
Step 3: Convert "pH₂" to atm
We will use the conversion factor 1 atm = 760 mmHg.
735 mmHg × 1 atm/760 mmHg = 0.967 atm
Step 4: Convert "25°C" to K
We will use the following expression.
K = °C + 273.15 = 25°C + 273.15 = 298 K
Step 5: Calculate the moles of hydrogen (n) formed
We will use the ideal gas equation.
P × V = n × R × T
n = P × V/R × T
n = 0.967 atm × 8.11 L/(0.0821 atm.L/mol.K) × 298 K = 0.321 mol
Step 6: Calculate the mass corresponding to 0.321 moles of hydrogen
The molar mass of H₂ is 2.02 g/mol.
0.321 mol × 2.02 g/mol = 0.648 g
Facilitated diffusion moves large molecules through ________.
The diffusion of solutes through transport proteins in the plasma membrane is referred to as facilitated diffusion. Passive transport is a subset of facilitated diffusion. Facilitated diffusion is still passive transport even though it uses transport proteins.
In contrast to passive diffusion, assisted diffusion does not result in the carried molecules dissolving in the phospholipid bilayer. Proteins instead allow the delivered molecules to pass through the membrane without coming into contact with its hydrophobic interior.
Materials move across the plasma membrane with the aid of membrane proteins during facilitated transport, also known as facilitated diffusion.
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Which event is an example of sexual reproduction in plants?
A. Pine trees produce seeds in cones.
B. Mosses form spores in capsules.
C. A kalanchoe produces plantlets on its leaves.
D. A potato has buds that can grow into new stems.
Answer:
the correct answer to your question is b
Consider the following reaction:
Mg(s) + 2 HCl (aq) → H2(g) + MgCl2(aq)
If 3.65 mol of magnesium and 3.65 mol of hydrochloric acid are reacted, how many
moles of hydrogen gas are produced?
Answer: 1.825 moles of hydrogen gas are produced.
Explanation:
The balanced chemical equation is:
[tex]Mg(s)+2HCl(aq)\rightarrow H_2(g)+MgCl_2(aq)[/tex]
According to stoichiometry :
2 moles of [tex]HCl[/tex] require = 1 mole of [tex]Mg[/tex]
Thus 3.65 moles of [tex]HCl[/tex] will require=[tex]\frac{1}{2}\times 3.65=1.825moles[/tex] of [tex]Mg[/tex]
Thus [tex]HCl[/tex] is the limiting reagent as it limits the formation of product and [tex]Mg[/tex] is the excess reagent.
As 2 moles of [tex]HCl[/tex] give = 1 mole of [tex]H_2[/tex]
Thus 3.65 moles of [tex]HCl[/tex] give =[tex]\frac{1}{2}\times 3.65=1.825moles[/tex] of [tex]H_2[/tex]
Thus 1.825 moles of hydrogen gas are produced.
Why might calcium also be called the calcium of citric acid
Calcium also be called the calcium of citric acid because calcium citrate malate contains the calcium salt of citric acid and malic acid.
What is citric acid?Citric acid is an organic compound with a chemical formula [tex]HOC(CO_2H)[/tex].
Calcium citrate malate is a water-soluble calcium supplement. It is the calcium salt of citric acid and malic acid with variable composition.
Hence, calcium is also called the calcium of citric acid.
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I really need help on this question please help
i need help with this please
Answer:
owa owa owa owa
Explanation:
owa owa owa owa owa owa owa
What is atomic mass unit?
Explanation:
An atomic mass unit is defined as a mass equal to one twelfth the mass of an atom of carbon-12.