A buffer solution is often referred to as a mixture of an aqueous solution of a weak acid and its conjugate base or weak base and its conjugate acid.
NH4CL is a weak base and NaOH is a strong base and when both it gives you a basic buffer and the result will give you an acid/base needed for the buffer.NH 3 is a weak base, but NaOH is a strong base and therefore the combination of these solutes would not make a buffer solution because both will give you a base and no acid.Conclusively we can say that an acid or base needed for making buffer solutions and not base alone
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i am a metal with electrons in 5 energy levels that can form ions with a +2 charge
Anyone know this ???
[tex]\huge\boxed{OptionB}[/tex]
_____________________________________VESSEL A:The superior vena cava (SVC) is the superior of the two venae cavae, It is located above inferior vena cava and it returns the deoxygenated blood from the systemic circulation to the right atrium of the heart.
----------------------------------------------------------------------VESSEL C:The aorta is the main artery that carries blood away from your heart to the rest of your body.
----------------------------------------------------------------------ATRIUM D:The Left Atrium is one of the two atriums, it receives the oxygenated blood from the lungs via Pulmonary vein.
----------------------------------------------------------------------VENTRICLE E:The Left Ventricle is one of the two ventricles, it receives the oxygenated blood by the Left atrium through the mitral valves. From the ventricle oxygenated blood is provided to the whole body.
----------------------------------------------------------------------VESSEL B:Pulmonary Artery is one of the two pulmonary vessels which connect the blood heart and lung. Pulmonary Artery takes the deoxygenated blood from the Right ventricle to the Lungs from the oxygenation.
_____________________________________Best Regards,'Borz'Which of the following elements has the heaviest atom?
a. nickel
b. lead
c. iron
d. gold
Answer:
IronExplanation:
Because it is never because iron weights 9 tons or 17,000 poundsAnswer:
b. lead
Explanation:
look on the periodic table and it has its atomic mass and lead (Pb) is the heaviest
Describe the process of photosynthesis (including what components get released). ASAP
Answer: It is convenient to divide the photosynthetic process in plants into four stages, each occurring in a defined area of the chloroplast: (1) absorption of light, (2) electron transport leading to the reduction of NADP+ to NADPH, (3) generation of ATP, and (4) conversion of CO2 into carbohydrates (carbon fixation). All four stages of photosynthesis are tightly coupled and controlled so as to produce the amount of carbohydrate required by the plant. All the reactions in stages 1 – 3 are catalyzed by proteins in the thylakoid membrane. The enzymes that incorporate CO2 into chemical intermediates and then convert it to starch are soluble constituents of the chloroplast stroma (see Figure 16-34). The enzymes that form sucrose from three-carbon intermediates are in the cytosol.
Answer:
Glucose gets made using Carbon dioxide, water, and sunlight. Glucose serves as food for the plant. This was the answer to your question
Explanation:
which phrases describe sedimentary rock? check all that apply.
Answer:
Sedimentary rock, rock formed at or near Earth's surface by the accumulation and lithification of sediment by the precipitation from solution at normal surface temperatures
Explanation:
Which products are formed when aluminum is added to a silver chloride solution? Use the activity series below if needed. Al> Mn > Zn>.Cr > Fe > Cd> Co > Ni > Sn > Pb>H> Sb > Bi > Cu> Ag > Pd >Hg > Pt O none O only AICI3 O AlCl3 and Ag O AIAg3 and Cl2
Answer:
AlCl3 and Ag
Explanation:
Edge 2020
The products formed when aluminum is added to a silver chloride solution are "AlCl3 and Ag".
The reaction of aluminum and silver chloride is a single substitution type of reaction that is expressed as follows: Al (s) + 3AgCl (aq) = AlCl3 (aq) + 3Ag (s)When aluminum is added to the silver chloride solution, the cations are exchanged in the process forming AlCl3 and Ag.
Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.Chemical reactions are an integral part of technology, culture, and indeed of life itself. Burning fuels, smelting iron, making glass and pottery, brewing beer, and making wine and cheese are among many examples of activities incorporating chemical reactions that have been known and used for thousands of years. Chemical reactions abound in the geology of Earth, in the atmosphere and oceans, and in a vast array of complicated processes that occur in all living systems.Learn more about chemical reactions
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Classify H2O as cation, anion or neither
Answer:
H²O is neither a cation or anion
Explanation:
Hydrogen can form a cation (H+) or an anion (H-‐). Hydrogen in water (H20), ammonia (NH3), methane (CH4) and millions of other compounds is neither a cation nor an anion.
Easy Mole Conversion:
How many grams are in 2.00 moles of cobalt (I) hydroxide?
Answer:
Mass = 185.896 g
Explanation:
Given data:
Mass in gram = ?
Number of moles = 2.00 mol
Solution:
Formula:
Number of moles = mass/molar mass
Molar mass of cobalt (I) hydroxide =92.948 g/mol
by putting the values,
2.00 mol = Mass/92.948 g/mol
Mass = 2.00 mol × 92.948 g/mol
Mass = 185.896 g
Sealed containers of fizzy drinks contain dissolved carbon dioxide. The dissolved CO2 is in equilibrium with a small quantity of gaseous CO2 at the top of the container.
Find partial pressure of CO2 gas in 355 ml can of fizzy drink at 25C if the concentration of CO2 in the fizzy drink 0.1 M. Given that Henry’s law constant for CO2 is 3.3 x 10-2 M atm-1.
What mass of CO2 is dissolved in a 355 ml can of fizzy drink when it is stored at 25C.
Answer:
3 atm
1.6 g
Explanation:
Step 1: Given data
Volume of the solution (V): 355 mLConcentration of the solution (C): 0.1 MHenry’s law constant for CO₂ (k): 3.3 × 10⁻² M atm⁻¹.Step 2: Find partial pressure (P) of CO₂ gas
We will use Henry's law.
C = k × P
P = C / k
P = 0.1 M / 3.3 × 10⁻² M atm⁻¹
P = 3 atm
Step 3: Calculate the mass of CO₂ gas
The molar mass of carbon dioxide is 44.01 g/mol.
0.355 L × 0.1 mol/L × 44.01 g/mol = 1.6 g
Hugh wrote the properties of physical and chemical weathering in the table shown.
Types of Weathering
Physical Weathering
Chemical Weathering
Temperature may break the rocks Can be caused by chemicals in water
Can be caused by snow and pressure Composition of rock remains same
Why is Hugh's table incorrect? (5 points)
a
Chemicals in water cause physical weathering.
b
ос
Temperature is unable to break rocks physically.
Chemical weathering changes the composition of rocks.
Physical weathering is unaffected by snow and pressure.
Od
Answer:
I am sure that the C one is correct
Answer:
how is this college level..im doing this in middle school..
Explanation:
Ultraviolet light A (UVA) can penetrate deeper layers of skin than UVB. If UVA has a wavelength of 400 nm, how much energy would be in this wave? 2 x 10-17)
Answer:
E = 5×10⁻¹⁹ J
Explanation:
Given data:
Wavelength = 400 nm (400×10⁻⁹ m)
Energy of wave = ?
Solution:
Formula:
E = h c/λ
c = 3×10⁸ m/s
h = 6.63×10⁻³⁴ Js
Now we will put the values in formula.
E = 6.63×10⁻³⁴ Js × 3×10⁸ m/s /400×10⁻⁹ m
E = 19.89×10⁻²⁶ J.m / 400×10⁻⁹ m
E = 0.05×10⁻¹⁷ J
E = 5×10⁻¹⁹ J
Write the condensed electron configurations for the follow- ing atoms and indicate how many unpaired electrons each has: (a) Mg, (b) Ge, (c) Br, (d) V, (e) Y, (f) Lu.
Answer:
i think it is ge
Explanation:
Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Therefore, the condensed electron configurations for the given element can be written as below.
What is element?Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.
The systematic distribution of electrons in the various atomic orbitals is called its electronic configuration. 1,2,3 represents the number of shells and s and represents the orbitals. The superscripts represents the number of electrons in each orbitals.
Electronic configuration of Mg Ne 3s²
Electronic configuration of Ge [Ar] 3d¹⁰ 4s² 4p²
Electronic configuration of Br [Ar] 3d10 4s² 4p⁵
Electronic configuration of V [Ar] 3d³ 4s²
Electronic configuration of Y [ Kr ]4d¹ 5s²
Electronic configuration of Lu [Xe] 4f¹⁴ 5d¹6s²
Therefore, the condensed electron configurations for the given element can be written as above.
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Choose the most correct statement from the options below. Be sure to consult the
periodic table.
Magnesium (Mg) and chlorine (Cl) are in the same GROUP and, so, share
SIMILAR physical and chemical properties.
Magnesium (Mg) and chlorine (CI) are in the same PERIOD and, so, share
SIMILAR physical and chemical properties.
Magnesium (Mg) and chlorine (CI) are in the same PERIOD and, so, will have
very DIFFERENT physical and chemical properties.
Magnesium (Mg) and chlorine (CI) are in the same GROUP and, so, share
DIFFERENT physical and chemical properties.
Answer: B
Explanation:
Mg and Cl are in the same row aka period. Elements in the same period have similar properties like electron shells so the second option is the best answer
What force opposes the electromagnetic force in the atom?
Answer:
The strong forces oppose the electromagnetic force of repulsion between protons. Like ”glue” the strong force keeps the protons together to form the nucleus. The strong forces and electromagnetic forces both hold the atom together.
Explanation:
Hope This helps
Answer:
The strong forces oppose the electromagnetic force of repulsion between protons.
Answer the questions about the characteristics of the elements in group 2 (the alkaline earth metals).1. What happens when the elements in group 2 react with iodine? a. a salt is formed (MI_2) b. a salt is formed (MI) c. no reaction 2. How do they react with water? a. hydrogen gas is released b. oxygen is released 3. How do they react with oxygen? a. an oxide is formed (M_2 O) b. an oxide is formed (MO) c. no reaction 4. Which reacts the most vigorously? a. Ba b. Mg c. Ca d. Sr e. Ba 5. Which element in the group is the most metallic in character? a. Be b. Mg c. Ca d. Sr e. Ba
Answer:
Explanation:
1
When elements in group 2 react with Iodine, a salt MI_2 is formed
2
When they react with water, Hydrogen gas is released
3
When they react with Oxygen, an Oxide, MO is formed
4
The most vigorously reactive metal in group 2 is Barium, Ba. Reactivity increases as one moves downward in group 2
5
The most metallic element is Barium, Ba. This is because in the periodic table, metallic strength of metals increases as one moves down the table.
The thing that happens when the elements in group 2 react with iodine is:
A salt MI_2 is formed
The way these elements react with water is:
They form hydrogen gasThe way they react with oxygen is:
They produce an Oxide, MO
The element which reacts the most vigorously in group 2 is:
Barium, Ba. This is because their reactivity increases as one moves downward in group 2
The element in the group which is the most metallic in character is:
Barium, Ba. It is this way because of the changes in metallic strength as metals change positions in the tableRead more here:
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1. How isotopes of copper are Cu-63 and Cu-65. How are these two isotopes the same? How are they different?
2. What is an isotope?
3. Why do elements in the same group have similar chemical properties?
4.What are valence electrons?
5.Write the symbol for each of the following elements:
The halogen in period three
The alkali metal in period two
The noble gas in period one
The alkaline earth element in period six
Any transition metal in the 5th period
A metaloid in group 14
A nonmetal in group 16
6. What are two differences between a metal and a nonmeta
PLEASE ASAP!!!!!!!!!!!!!!
Answer:
question 6. answer is Metals are considered to be electropositive in nature due to their ability to donate electrons. Whereas non-metals are electronegative as they generally accept electrons
Using the van der Waals equation, calculate the pressure for a 1.25 mol sample of xenon contained in a volume of 1.000L at 75°C; a = 4.194 L2 atm/mol2 and b = 0.05105 L/mol for Xe. Compare these results to that predicted by the ideal gas law.
Answer:
ABC
Explanation:
hrdjyt
1. Change the following into correct scientific notation.
a) 0.03050 =
b) 0.256 x 10°=
c) 25.005 10 =
Answer:
a) 0.03050 = 3.050 × 10-²
b) 0.256 x 10°= 2.56 × 10-¹
c) 25.005 10 = 2.500510 × 10¹
Explanation:
Scientific notations is a way of making very large or very small numbers more comprehensive or simplified. It involves the use of power of ten (10^). The numbers are represented to the power of ten. The following format is used:
a x 10^b
where; a is a number or decimal number between 1 and 10 i.e less than 10 but greater than 1
b is the power of ten
To write a number in scientific notation,
- we move the decimal point right or left depending on whether we're trying to reduce or increase the number
- we count the number of times the decimal point was moved. This serves as the b in the format above.
For example,
a) 0.03050 = 3.050 × 10-²
The decimal point was moved rightward twice. This caused the ^-2 power.
b) 0.256 x 10°= 2.56 × 10-¹
The decimal point was moved rightward once. This caused the ^-1 power.
c) 25.005 10 = 2.500510 × 10¹
The decimal point was moved leftward once. This caused the ^1 power.
How many micrograms of sodium chloride (to 2 decimal places) can be added to 527 mL of 0.00150 M silver nitrate before a precipitate forms? (Ksp = 1.80 x 10-10)
Answer:
use google
Explanation:
PLEASE HELP ME ASAP
N2 + 3H2 → 2NH3
How many grams of ammonia,
NH3, would be formed from the
complete reaction of 4.50 moles
hydrogen, H2?
Answer:
Mass = 51 g
Explanation:
Given data:
Mass of ammonia formed = ?
Number of moles of hydrogen = 4.50 mol
Solution:
Chemical equation:
N₂ + 3H₂ → 2NH₃
Now we will compare the moles of hydrogen and ammonia.
H₂ : NH₃
3 : 2
4.50 : 2/3×4.50 = 3 mol
Mass of ammonia formed:
Mass = number of moles × molar mass
Mass = 3 mol × 17 g/mol
Mass = 51 g
what is the president for 2020
Answer:
joe biden
Explanation:
It was DONALD TRUMP :) But Joe Biden got elected :(
How many electrons does Sodium lose to become an ion
A 1,500 kg truck is towed sideways out of a mud-hole with a force of 15,000 N. What acceleration of the tow truck is needed to move this vehicle?
What is the ratio of potassium atoms to oxygen atoms in potassium oxide (K2O)?
K20
K = 1+
0 = 2-
K/0 = 1/2
the answer is K:O = 1:2
___ is a type of weathering caused by a chemical reaction with water.
A. Carbonation
B. Abrasion
C. Hydrolysis
D. Hydration
Option ( C ). Hydrolysis (/haɪˈdrɒlɪsɪs/; ancient Greek for "water" and "to dissolve") is a chemical reaction in which water molecules break one or more chemical bonds.)
What does the example of hydrolysis mean?
Hydrolysis is the process of breaking down compounds by adding water. Here is an example of hydrolysis:
Sodium acetate is a type of salt. When sodium acetate is mixed with water, the chemical bonds are broken and it breaks down into sodium ions and acetate ions.
What is function of hydrolysis?
Hydrolysis reactions break the bonds and release energy. Biopolymers are ingested and hydrolyzed in the gastrointestinal tract to form small molecules that can be absorbed by cells and further broken down to release energy.
Where does the hydrolysis take place?
Hydrolysis is the process by which compounds are broken down into simpler compounds and involves the chemical uptake of water. Almost all tissues contain enzymes that catalyze hydrolysis, but the highest concentration is in the liver.
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What does animals exhale?
Answer:
Carbon dioxide
Explanation:
Humans are animals and we exhale carbon dioxide
What two options are homogeneous mixture
Answer:
vinegar and soap
Explanation:
Answer:
vinegar and soap
Explanation: just took the test
Calculate the root mean square (rms) average speed of the atoms in a sample of krypton gas at 0.14 atm and -16 0C.
Answer:
8.52 m/s
Explanation:
Step 1: Given data
Molar mass of krypton (M): 83.80 g/molPressure of the sample (P): 0.14 atmTemperature of the sample (T): -16 °CStep 2: Convert "T" to the Kelvin scale
When working with gases, we need to consider the absolute temperature. We will convert from Celsius to Kelvin using the following expression.
K = °C + 273.15 = -16 + 273.15 = 257 K
Step 3: Calculate the root mean square speed of the gas
The root mean square speed measures the average speed of particles in a gas. We will calculate it using the following expression.
[tex]v_{rms} = \sqrt{\frac{3 \times R \times T}{M} } = \sqrt{\frac{3 \times 8.314 J/mol.K \times 257 K}{88.30 g/mol} } = 8.52 m/s[/tex]
Select the best answer from the choices below. Light has many properties of waves, but sometimes it also behaves like:
Answer:
A photon
Explanation:
When electrons pass close to the standing wave of light, they hit the particles that are called photons
if a student added water to her cola what change would you expect to see in the ph level
Answer:
You would expect it to go down
Explanation:
This is because she is essentially watering down, causing the Ph level to go down too.
If a student added water to her cola, then the pH level is low. This is due to the fact that she is essentially diluting, which lowers the pH level as well.
What is pH ?The pH scale determines how acidic or basic water is. The range is 0 to 14, with 7 representing neutrality. Acidity is indicated by pH values below 7, whereas baseness is shown by pH values above 7. In reality, pH is a measurement of the proportion of free hydrogen and hydroxyl ions in water.
pH stands for "Potential of Hydrogen" in its full form. The negative logarithm of the concentration of H+ ions is known as pH. As a result, the meaning of pH is defined as the strength or power of hydrogen.
A solution's pH is a significant indicator of its chemical composition. The pH can affect how readily available nutrients are, how biological processes work, how bacteria behave, and how chemicals behave.
Thus, If a student added water to her cola, then the pH level is low.
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