Answer:
If the atom is nuetral it will have 25 electrons as there is the same number of electrons and protons if the atom is nuetral. Yes electrons do orbit the nucleas. Electrons orbit in orbitals which have corresponding energy levels.
Explanation:
I have a masters in Algebra II
What happens when the particles of a gas collide?
A. They vibrate in place
B. They stick to one another
C. They become particles of a solid
D. They bounce off one another
Answer:
A
Explanation:
How many formula units make up 20.6 g of magnesium chloride (MgCl2)?
Answer:The formula of magnesium chloride is MgCl2 . The molar mass of MgCl2 is (24.30 + 2 × 35.45) g/mol=95.20 g/mol .
Explanation:
Which determines the reactivity of an alkali metal?
a. it's boiling and melting points
b. the shininess of its surface
c. the number of protons it has
d. it's ability to lose electrons
Answer:
d. It's ability to lose electrons
what are the reactants in a cheese sandwich
Answer:
cheese and bread
Explanation:
2 bread 1 cheese = cheese sandwich
3. What is the pairing arrangement of the nitrogenous bases? _____________ pairs with __________ and ____________ pairs with ___________.
Answer:
Adenine pairs with thymine and guanine pairs with cytosine
A 500.0-mL buffer solution is 0.100 M in HNO2 and 0.150 M in KNO2. Determine if each addition would exceed the capacity of the buffer to neutralize it.
a. 250 mg NaOH
b. 350 mg KOH
c. 125 g HBr
d. 1.35g Hl
Answer:
no one additions exceed the capacity of the buffer
Explanation:
given
Volume buffer = 500.0 mL = 0.5 L
mol HNO₂ = 0.5 L × 0.100 mol/L = 0.05 mol HNO₂
mol NO₂⁻ = 0.5 L × 0.150 mol/L = 0.075 mol NO₂⁻
solution
we know when any base more than 0.05 (HNO2) than exceed buffer capacity
and when any base more than 0.075 (KNO2) than exceed buffer capacity
when we add 250 mg NaOH (0.250 g)
than molar mass NaOH =40 g/mol
and mol NaOH = 0.250 g ÷ 40g/mol
mol NaOH = 0.00625 mol
0.00625 mol NaOH will be neutralized by 0.00625 mol HNO₂
so it would not exceed the capacity of the buffer.
and
when we add 350 mg KOH (0.350 g)
than molar mass KOH =56.10 g
and mol KOH = 0.350 g ÷ 56.10 g/mol
mol KOH = 0.0062 mol
here also capacity of the buffer will not be exceeded
and
now we add 1.25 g HBr
than molar mass HBr = 80.91 g/mol
and mol HBr = 1.25 g ÷ 80.91 g/mol
mol HBr = 0.015 mol
0.015 mol Hbr will neutralize 0.015 mol NO₂⁻
so the capacity will not be exceeded.
and
we add 1.35 g HI
molar mass HI = 127.91 g/mol
so mol HI = 1.35 g ÷ 127.91 g/mol
mol HI = 0.011 mol
capacity of the buffer will not be exceed
This table shows four species of plants, with descriptions. Which species are most likely vascular? the bracken and the bog groove moss the thallose liverwort and the bog groove moss the bracken and the lemon tree the thalose liverwort and the lemon tree Mark this and return
Answer:
it is b
Explanation:
i just took test b
Answer:
C maneeeee
:)
Explanation:
In Bohr model N3 moves up to N 4 the electron occupies distinct energy states where energy is absorbed or emmitted
Answer:
vkhcohvoccf
uxihfoydohfufyfocidicicugxigdixifxtxtduration jfhgxfcixig
cigcih
Explanation:
cihcohcohccohcjjcofidytstitddgggxogxxtdrrtteeeeeiiiixiiitttdooodooxyక్సజిఫ్స్ట్టిగ్గ్స్గ్డ్గ్
How many moles are in 1.29 x 1024 hydrogen atoms in HF
Answer:
No. Moles = 2.142 mole
state Graham's law diffusion of gas mathematical expression ?
Answer:
Graham's law states that the rate of diffusion or of effusion of a gas is inversely proportional to the square root of its molecular weight
Explanation:
When forming ions, nitrogen will gain or lose how many electrons, forming a cations or anions with a what charge?
Answer:
Nonmetals form negative ions (anions). A nitrogen atom must gain three electrons to have the same number of electrons as an atom of the following noble gas, neon. Thus, a nitrogen atom will form an anion with three more electrons than protons and a charge of 3−.
Explanation:
have advanced
What are the two processes of ocean to cloud?
Answer: The excess amount changes from a gas into a liquid or solid (ice). The process of water changing from a gas to a liquid is called "condensation," and when gas changes directly into a solid, it is called "deposition." These two processes are how clouds form.
5. How many moles of aluminum sulfate would contain 3.54 x 1025 sulfur atoms?
Answer:
19.6 moles of aluminum sulfate
Explanation:
Given parameters:
Number of sulfur atoms = 3.54 x 10²⁵ atoms
Unknown:
Number of moles of aluminum sulfate = ?
Solution:
Aluminum sulfate is expressed as;
Al₂(SO₄)₃
1 mole of Aluminum sulfate contains 3 moles of sulfur.
6.02 x 10²³ atoms are found in 1 mole of any substance;
3.54 x 10²⁵ sulfur atoms will be found in [tex]\frac{3.54 x 10^{25} }{6.02 x 10^{23} }[/tex] = 58.8moles of sulfur
1 mole of Aluminum sulfate contains 3 moles of sulfur.
or ;
3 moles of sulfur is contained in 1 mole of aluminum sulfate
58.8moles of sulfur will contain [tex]\frac{58.8}{3}[/tex] moles of aluminum sulfate
= 19.6 moles of aluminum sulfate
How did the instrument in the picture help to disprove part of Dalton's atomic model?
A)
It showed all matter is made of atoms and that atoms are indivisible and
indestructible.
B)
It showed that all atoms of a particular element are not identical.
C)
It showed that compounds are formed by a combination of two or more
different kinds of atoms.
D)
It showed that a chemical reaction is a rearrangement of atoms.
No
Answer:
It’s b;)
Explanation:
Answer:
B is correct
Explanation:
The Lewis representation above depicts a reaction between hydrogen (blue) and a main-group element from group 5A (red). In this representation, each Y atom needs electron(s) to complete its octet, and gains these electrons by forming bond(s) with atoms of H . There are unshared electron pair(s) and bonding electron pair(s) in the product molecule. The bonds in the product are _________ .
Answer:
Each Y atom needs three electrons to complete its octet by forming three bonds to hydrogen. There is one unshared pair of electrons and three bonding pairs of electrons. The bonds in the product are covalent.
Explanation:
Recall that group 5A elements contain five electrons in their outermost shell. These five electrons consists of a lone pair and three electrons that can form three bonds with hydrogen to give YH3 where Y is the group 5A element.
The YH3 molecule contains one lone(unshared) pair of electrons as well as three bonding pairs of electrons. The compounds are covalent.
SO3 is a covalent compound with no lone pairs on the central S atom. What's the structure of a molecule of SO3? Is an SO3 molecule polar or non-polar?
Question 14 options:
A)
Trigonal planar, non-polar
B)
Trigonal pyramidal, polar
C)
Trigonal planar, polar
D)
Trigonal pyramidal, non-polar
Answer:
A
Explanation:
it has non polar molecule, because it has the equal sharing of electrons, so equal repulsion from all sides. atoms are equally represented.
Answer:
Trigonal planar, non-polar
Explanation:
WILL GIVE 50 POINTS AND BRAINLIEST
Plate Tectonics Lab Report
Instructions: In the Plate Tectonics lab you will investigate the interactions between continental and oceanic plates at convergent, divergent, and transform boundaries around the globe. Record your observations in the lab report below. You will submit your completed report.
Name and Title:
Include your name, instructor's name, date, and name of lab.
Objective(s):
In your own words, what was the purpose of this lab?
Hypothesis:
In this section, please include the if/then statements you developed during your lab activity for each location on the map. These statements reflect your predicted outcomes for the experiment.
Location One: Select two events that you predict will be observed. If I explore two continental plates at a convergent boundary, then I will observe:
earthquakes
faults
ocean formation
mountains
volcanoes
island chains
seafloor spreading
Location Two: Select three events that you predict will be observed. If I explore two continental plates at a divergent boundary, then I will observe:
earthquakes
faults
ocean formation
mountains
volcanoes
island chains
seafloor spreading
Location Three: Select three events that you predict will be observed. If I explore two continental plates at a transform boundary, then I will observe:
earthquakes
faults
ocean formation
mountains
volcanoes
island chains
seafloor spreading
Location Four: Select two events that you predict will be observed. If I explore two oceanic plates at a convergent boundary, then I will observe:
earthquakes
faults
ocean formation
mountains
volcanoes
island chains
seafloor spreading
Location Five: Select three events that you predict will be observed. If I explore two oceanic plates at a divergent boundary, then I will observe:
earthquakes
faults
ocean formation
mountains
volcanoes
island chains
seafloor spreading
Location Six: Select two events that you predict will be observed. If I explore two oceanic plates at a transform boundary, then I will observe:
earthquakes
faults
ocean formation
mountains
volcanoes
island chains
seafloor spreading
Procedure:
The procedures are listed in your virtual lab. You do not need to repeat them here. Please be sure to identify the test variable (independent variable), outcome variable (dependent variable).
Reminder: Test variable = the item you are changing or manipulating; Outcome variable = the item you are measuring
Test variable (independent variable):
Outcome variable (dependent variable):
Data:
Record the data from each location below.
Location Name Boundary Type
(C=Convergent, D=Divergent, or T=Transform) Year Observed
(5, 10, or 20 million years) Geologic Events Observed
(earthquakes, faults, ocean formation, mountains, volcanoes, island chains, seafloor spreading)
Location One
Himalayas 5 Event 1-
20 Event 2-
Location Two
East Africa 5 Event 1-
10 Event 2-
20 Event 3-
Location Three
San Andreas fault zone 5 Event 1-
10 Event 2-
20 Event 3-
Location Four
Aleutian Islands 5 Event 1-
20 Event 2-
Location Five
Mid-Atlantic Ridge 5 Event 1-
10 Event 2-
20 Event 3-
Location Six
Alpine Fault 5 Event 1-
20 Event 2-
Conclusion:
Your conclusion will include a summary of the lab results and an interpretation of the results. Please write in complete sentences.
What types of geological events or changes occur at divergent plate boundaries?
What types of geological events or changes occur at convergent plate boundaries?
What types of geological events or changes occur at transform plate boundaries?
Explain how these geological processes and interactions have changed Earth's surface through the years. Be sure to use evidence to support your answer.
Answer:
here are what i have so far, im doing this right now
Explanation:
Plate Tectonics Lab Report
Instructions: In the Plate Tectonic lab you will investigate the interactions between continental and oceanic plates at convergent, divergent, and transform boundaries around the globe. Record your observations in the lab report below. Y
Objective(s):
To look at interactions between continental and oceanic plates, etc.
Hypothesis:
In this section, please include the if/then statements you developed during your lab activity for each location on the map. These statements reflect your predicted outcomes for the experiment.
Location One: Select three events that you predict will be observed. If I explore two continental plates at a convergent boundary, then I will observe:
• earthquakes
• mountains
• volcanoes
Location Two: Select three events that you predict will be observed. If explore two continental plates at a divergent boundary, then I will observe:
• ocean formation
• volcanoes
• seafloor spreading
you will submit your completed report
ps; you might want to change up the objective.
A geological event is a brief, spatially diverse, dynamic and ongoing occurrence in the history of the Earth.
What is geological event?A geological event is a brief, spatially diverse, dynamic (diachronous), and ongoing occurrence in the history of the Earth that aids in the modification of the Earth system and the production of geological strata. The concept of event stratigraphy initially came up as a way to identify, analyse, and correlate how significant physical and biological events have affected the overall stratigraphical record.
Israel's Dead Sea basin Holocene sediments contain seismic activity. This can be considered a record of a geological event, an earthquake, that altered the strata. Geological events can occur over timescales of order of magnitude, from just a few seconds through millions of years, as well as on a variety of spatial scales, from the local to the globe.
1. Volcanoes and minor earthquakes
2. Volcanoes, earthquakes and fold mountains.
3. Earthquakes and fold mountains.
4. Magma from volcanoes is filled with nutrients that makes land fertile.
Therefore, a geological event is a brief, spatially diverse, dynamic and ongoing occurrence in the history of the Earth.
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12. Calculate the molecular weight.
a. Sodium Chloride (NaCl)
b. Magnesium sulphate (MgSo.)
Explain why HCl can be a strong electrolyte, but a dilute HCl solution can be a poor conductor?
Answer:
Because as the concentration is diminished, the capacity to transfer electricity is diminished as well.
Explanation:
Hello!
In this case, since electrolytes are substances that are able to conduct the electricity in aqueous media (solutions in which water is the the solvent) because they have the capacity to form ions with both positive and negative charges, due to the fact that HCl is a strong acid, we notice it is fully ionized in solution and therefore it is a strong electrolyte. However, when the concentration is diminished, we can notice that strength is diminished as well because less ions will have the capacity to transfer the electricity and therefore it'd become a poor conductor or weak electrolyte.
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As you move from N to Bi, the metallic properties of the element
A. increases.
C. remains the same.
B. decreases.
D. does not follow a trend.
Answer:
b. decreases
Explanation:
i just took a test on it
As you move from N to Bi, the metallic properties of the element decrease. The correct option is B.
What are nitrogen and bismuth?Nitrogen is a chemical element, whose chemical element is N. Nitrogen is a gas and its atomic number is 7. It is a non-metal and is present in group 15 of the periodic table.
Bismuth is a chemical element, whose chemical element is Bi. It is a post-transition metal, and it is also present in group 15 of the periodic table near arsenic and antimony. Its atomic number is 83.
Now, nitrogen and bismuth are present in the same line and group. Nitrogen is the first element of the group and going down, there is bismuth present in the group last. So the metallic property decreases from going down the group.
Thus, the correct option is B. decreases.
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Based on your lab report, provide the chemical reaction that occurs in Benedict's test for the following molecule.
Explanation:
I DONT UNDERSTAND WHAT U WANT TO SAY
How many grams of CO2 are produced from 10 grams of C2H6
Answer:
Explanation:
no of moles of C2H6=10/30=0.33
complete combustion of 2 moles of ethane produce 4 moles of CO2 therefore 0.33 moles of C2H6 produced 0.66 moles of CO2
now moles =given mass/molar mass
mass= moles*molar mass
mass of CO2=0.67*44=29.48 g
Write the overall molecular equation for the reaction of hydroiodic acid ( HI ) and potassium hydroxide. Include physical states. Enter the formula for water as H2O .
Answer:
HI(aq) + KOH(aq) --> KI(aq) + H2O(l)
Explanation:
HI is an acid and KOH is a base, this means that the reaction would be a neutralization reaction.
The equation is given as;
HI + KOH --> KI + H2O
Adding the physical states we have;
HI(aq) + KOH(aq) --> KI(aq) + H2O(l)
True or False: All temperatures used in the comparisons or calculations of gases must use the Kelvin temperature scale.
Answer:
True
Explanation:
I used my notes from class today. I could be wrong.
Automobile air bags use the decomposition of sodium azide as their sources of gas for rapid inflation, represented in the reaction below. What mass (in grams) of NaN4is required to provide 40.0 L of N2 at 25°C and 763 torr?
Answer:
The answer is 95 degree celcius
Sulfur has an electronegativity of 2.58, while Cesium has a value of 0.79. Based on this information, they would have what kind of chemical bond?
Answer:
Ionic
Explanation:
Because sulphur is a non-metal and cesium is part of the group 1 Alkali Metals, this creates an ionic bond
Ionic bonds are created from one metal and one non-metal element.
This still is declared as Ionic despite the balance of this is Cs2S
What is the coefficient of oxygen gas after balancing the following equation?
identify the statement that accurately describes ATP
Answer:
Adenosine triphosphate
In science, ATP stands for adenosine triphosphate. This chemical, discovered in the 1920s, is important to all life. It stores and releases energy for many cellular processes. It is found in mitochondria.
Explanation:
A student was holding a metal rod to a candle flame. After a while he noticed that his hand was getting hot.
a. Radiation
b. Conduction
c. Convection
d. Transformation
Answer:
Conduction
Explanation:
Conduction is when energy directly travels through a solid to get from one point to another.
A student was holding a metal rod to a candle flame. After a while, he noticed that his hand was getting hot due to conduction.
What is conduction?
The definition of conduction is the movement of something together with warmness or energy through a medium or passage. An instance of conduction is using a metallic rod to roast marshmallows on an open hearth and feeling the warmth rise through the rod from the fire for your hand.
What are 4 examples of conduction?A lizard warming its belly on a hot rock.Touching a hot seatbelt when you get into a car.A blacksmith heating up a sword in hot coals, and the heat transferring up through the metal.The heat from the stovetop transfers into a metal pot of water.
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You have two containers. The first container contains 22.99 grams of solid
sodium (Na). The second container contains 15.999 grams of Oxygen (O).
Which container has more moles of the indicated substance? *
Answer:
The sodium has more moles.
n(Na)=2.09 mole
n(O)=0.999 mole