I will give Brainliest
When a hydrogen carbonate ion reacts with water, water acts as a Brønsted-Lowry base. Choose the reaction that describes this.
A. HCO3−(aq) + H2O(l) ⇌ H3O+(aq) + CO32−(aq)
B. H2CO3(aq) + H2O(l) ⇌ OH−(aq) + H3CO3+(aq)
C. HCO3−(aq) + H2O(l) ⇌ OH−(aq) + H2CO3(aq)
D. HCO3−(aq) + H3O+(aq) ⇌ H2O(l) + H2CO3(aq)
Answer:
The answer would be A to this question.
A) NaC2HO4 B) H2F2BLi C)2He2PSO4 D)3He2O4PH
Elements found in these formulas=
Plz help, its my last question.. or atleast help me understand it
Use a periodic table and match the element symbols in the formula to their name.
Which statement best describes the purpose of mitosis?
1.to repair damage to cellular structures
2.to replicate the cell's genetic material
3.to produce new proteins for cell growth
4.to produce energy for cellular function
Answer:
to replicate the cell's genetic material
Explanation:
i took the test
insertion is a type of mutation that? 1.)adds a base to the DNA sequence 2.) a change in every amino acid that follows the point of mutation 3.) a change in one or few nucleotides that occur at single point in the DNA 4.) involves the loss of all or part of a chromosome
Answer:what is it
Explanation:
What are examples and non-examples of stars?
Answer:
Explanation:
Good Example of a Star- The sun, Star Clusters, The North Star
Bad Examples of a Star-Earth, Galaxies, Solar Systems
Examples of stars: Sun, Stars.
Non-examples of stars: Earth, Moon, Planets.
Why Sun is a star?The Sun, a 4.5 billion-year-old yellow dwarf star and the center of our solar system, is a hot, burning ball of hydrogen and helium. It is the only star in our solar system and is located approximately 93 million miles (150 million kilometers) from Earth. On our home planet, life as we know it would not be possible without the energy of the Sun.Despite being the hub of our solar system and crucial to our existence, the Sun is simply an average-sized star. There have been found stars up to 100 times bigger. Additionally, many solar systems contain multiple stars. Scientists can learn more about the workings of far-off stars by examining our Sun.As a star, the Sun doesn’t have any moons, but the planets and their moons orbit the Sun.To learn more about the sun, refer to https://brainly.com/question/15837114
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An unknown element has 2 naturally occurring isotopes. The first isotope has an atomic mass of 84.9117 and the second isotope has an atomic mass of 86.909. Their abundances are 72.2% and 27.8% respectively.
Answer Choices: 85.56 86.44 85.21 86.00
Answer:The other isotope, 65Cu, has an abundance of 30.91%. Calculate the average atomic mass of copper. 63Cu 0.6909 x 63= 43.5267 65Cu 0.3091 x 65= +20.0915
Explanation:Nov 17, 2015 — The average atomic mass of an element is determined by taking the weighted average of the atomic masses of its naturally occurring isotopes. Now, weighted average ... avg. atomic mass=∑i(isotopei×abundancei). The more ... of the element. In your case, you know that rubidium has two stable isotopes.
Explanation:
To find the average atomic mass of the element we must take a weighted average. Using the formula [tex]am = (m_{1} * abundance)[/tex] . Plug and chug gives us
[tex]am = (84.9117 * 0.722) + (86.909 * 0.278) = approx. 85.56g/mol[/tex]
The element has an average mass of 85.56 amu.
The light bulb converts electrical energy into light and _________
Answer:
The light bulb converts electrical energy into light and heat energy
I have no clue what the answer is, can u plz help me?
Answer:
D
Explanation:
Which statement best describes heat and thermal energy?
They are different words for the same thing.
They represent different concepts.
Heat is what happens when thermal energy stops moving between substances.
Thermal energy is what happens when heat moves between substances.
Thermal energy is what happens when heat moves between substances.
Further explanationThermal energy usually refers to the temperature of an object which indicates the energy it has
Temperature is used as a guide to the level of thermal energy from objects
While heat is the transfer of thermal energy
Heat moves when there is a difference in temperature
The amount of heat is influenced by the mass of the object and the difference in temperature
Can be formulated :
Q = m.c.ΔT
Q: heat received or removed by an object (J)
m: object mass (kg)
c: heat type substance (J / kg⁰C)
ΔT: temperature change (⁰C)
Answer:
I dont know why the other one has 5 starts but the answer is They represent different concepts.
Sandra reacts 3.345 g of zinc with hydrochloric acid. She obtained 3.956 g of zinc chloride. Calculate the percent composition of chloride in zinc chloride.
Explanation:
One molecule of the antibiotic known as penicillin G has a mass of ... b) If you isolate 115 g of zinc chloride, what is the percent yield of the metal ... This drives off the volatile hydrochloric acid, but the.
As Sandra reacts to the 3.345 g of zinc with hydrochloride acid as HCL the obtained value is about 3.956 g of zinc and the chloride the calculated value is.
The composition of chloride and zinc chloride is formed when a halogen gains an electron and when the Hydrogen chloride is dissolved.one molecule of the antibiotics known the penicillin i.e G has a mass of 115 g of zinc chloride, what is the percent yield of the metal This drives the volatile HCL acid.Learn more about the Sandra.
brainly.com/question/19793109.
In which process are simple materials chemically combined to form to more complex materials.
1. synthesis
2. digestion
3. homeostasis
4. diffusion
1. synthesis
because it is the only option which is a form of manufacturing complex materials
How much of the moon's bright side can you see during a new moon?
A: 0 percent
B: 10 percent
C: 50 percent
D: 100 percent
Answer:
C 50 percent
Explanation:
A. 0 percent
the moon and the sun aren't lined up on a new moon.
What are two properties of liquids, solids, gases and matter. What are two important things about them.
2.l
A certain solid has a volume of 35.7 cm and weighs 85 grams. What is its density?
Answer:
The answer is 2.38 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass of object = 85 g
volume = 35.7 cm³
We have
[tex]density = \frac{85}{35.7} \\ = 2.380952...[/tex]
We have the final answer as
2.38 g/cm³Hope this helps you
A sample of phosphorus contains 1.38e24 atoms. How many moles of phosphorus is this?
2.3 grams
0.44 grams
2.3 moles
0.44 moles
Answer:
The answer is 2.3 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question
N = 1.38 × 10²⁴ atoms
So we have
[tex]n = \frac{1.38 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 2.29235880...[/tex]
We have the final answer as
2.3 molesHope this helps you
Answer:
2.3 moles
Explanation:
To find the number of moles in a substance given it's number of entities we use the formula where n is the number of moles N is the number of entities L is the Avogadro's constant which is 6.02 × 10²³ entities From the question N = 1.38 × 10²⁴ atoms So we have We have the final answer
2.3 moles
ASAP MULTIPLE CHOICE WILL MARK BRAINLIEST
Strontium has an atomic number of 38 and a mass number of 88.
How many neutrons are in one atom of strontium?
38
50
88
126
1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2
Answer:
This is the electron configuration for Strontium.
Explanation:
There are 38 protons/electrons in this configuration, it matches Strontium, which also has 38 electrons.
ASAP MULTIPLE CHOICE WILL MARK BRAINLIEST
Rhenium(Re) is made up of 37.4% 185Re and 62.6% 187Re.
The atomic mass of 185Re is 184.953 amu. The atomic mass of 187Re is 186.956 amu.
What is the average atomic mass of rhenium?
186.00 amu
186.207 amu
186.397 amu
187.00 amu
PLEASE HELP ASAP!!!
True or False: A larger numerical value for electron affinity means it is more difficult for an electron to be added to an atom.
Answer:
i feel like it's false. i'm not quite sure, but i have a feeling that it's false. i hope i'm right.
Explanation:
How many centimeters are in 15 3/8 inches.
Answer:
39.0525 Cm
Explanation:
Answer:
15 3/8 inches into cm: fifteen and three eights inches are equal to 15 3/8 x 2.54 = 39.0525 centimeters.
Explanation:
hope this helps, have a nice day, please mark me brainliest
What 2 units can be used when measuring volume?
Answer:
The 2 units are Gallons or Litres
Explanation:
If you like this answer then mark this answer as BRAINLIEST answer.
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Which of the following is a change of state?
A. Chocolate melting when it is heated
B. Liquid water being absorbed by a dry sponge
O C. Wax becoming carbon dioxide and water when a candle burns
D. Bread dough rising when left out on a warm counter
SUES
Answer:
I think C. Hope this Helps!
Explanation:
the number of valence electrons in an atom with an electron configuration is 1s2 2s2 2p6 3s2 3p4
Answer:
6 valence electrons
Explanation:
The atom you have given is a sulfur atom. It has 6 valence electrons.
Pls help me here, thanks in advance
Answer:
i think is
first is 2
second is 3
third is 2
fourth is 2
Answer:
which one do you want me to do there is four questions
Select the correct answer. Consider an atom that has an electron in an excited state. The electron falls to a lower energy level. What effect does that have on the electron? A. The electron releases energy in the form of light. B. The electron absorbs energy in the form of light. C. The electron retains its energy without any change. D. The electron transfers its energy to other electrons.
Answer:
A
Explanation:
The more energy u give the more the electron is able to get far away from the nucleas. So the opposite happens when u take away some energy, it will falll on lower energy state and will radiate the energy difference in form of a photon/light.
what is neons destiny and mohs hardness
The number of electrons in each of Neon's shells is 2, 8 and its electronic configuration is 1s2 2s2 2p6.
...
Neon Properties.
Melting Point: -248.59°C, -415.462°F, 24.56 K
Neon's destiny is to produce vibrant and attractive colors in neon signs, while Mohs hardness is a scale used to measure the hardness of minerals, and it does not apply to the element neon.
Neon's destiny refers to the role or purpose of the element neon in the natural world. Neon is a noble gas that is commonly used in neon signs due to its vibrant red-orange color when electricity is passed through it. Its destiny, in this context, is to create visually appealing and eye-catching signs.
On the other hand, Mohs hardness is a scale that measures the hardness of minerals. It was developed by Friedrich Mohs in 1812. The scale ranges from 1 to 10, with 1 being the softest and 10 being the hardest mineral.
Now, let's discuss the Mohs hardness of neon. Neon is an element, not a mineral, so it does not have a specific Mohs hardness value. The Mohs hardness scale is specifically designed for minerals, not elements. Therefore, we cannot assign a Mohs hardness value to neon.
To know more about Neon's destiny:
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Which description refers to fog?
burns off when it gets dark
extends up to 10 miles into the sky
is found in areas near bodies of water
forms when the ground warms at night after a cool, dry day
Answer:
The correct option is;
Is found near bodies of water
Explanation:
Fog forms as an aerosol which is visible to the eye that normally consists of tiny condensed water vapor droplets or crystals of ice that is formed when air that is warm comes in contact with cool air close to the Earth's surface. Fog can be taken as a stratus like cloud that lies close to the Earth's surface and it normally forms due to the presence of water bodies that are nearby, the topography of the area or the conditions of the wind.
C. Is found near bodies of water
What is the charge of the stable ion of oxygen?
Answer:
(2-)
Explanation:
the compounds 0(2-) is the stable
1. Even though the iceberg and the water that surrounds it are made up of the same
substance, the iceberg is able to float. Why is this?
A. The volume of the iceberg equals the volume of an equal mass of water.
B. The mass of the iceberg is greater than the mass of an equal volume of water.
C. The volume of the iceberg is greater than the volume of an equal mass of water.
Answer:
i think C it's okay beacause of Density
Answer:
a
Explanation:
they weigh same ratio.
5. When placed in water, objects with a density of greater than 1 gm/cm3 will
a: Sink
b:Float
Explain your answer.
Answer:
A: sink
Explanation: If an object's density is:
GREATER than [tex]1gcm^{3}[/tex], it will SINK in water.
LESS than [tex]1gcm^{3}[/tex], it will FLOAT in water.
hope this helps