Answer:
a
Explanation:
all elemental metals are made up of only one type of element
Answer:
It is 1.
Explanation:
If 765 mL of a gas at 2.78 atm, has the volume Change to 2.47 L , What is the pressure of the
gas in atm?
Answer:
0.87 atmExplanation:
The new pressure can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
Since we are finding the new pressure
[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]
From the question
2.47 L = 2470 mL
We have
[tex]P_2 = \frac{765 \times 2.78}{2470} = \frac{2142}{2470} \\ = 0.867206...[/tex]
We have the final answer as
0.87 atmHope this helps you
Which of these best describes the relationship between smoke from factories and acid
rain?
A
Smoke travels directly into clouds, creating acid rain.
B
Smoke turns clouds black, which causes them to become more acidic and release
black acid rain.
с
Smoke increases greenhouse gases, which make the water in clouds more acidic
so they release acid rain.
D
Smoke wipes out all the greenhouse gases in the atmosphere, increasing the
acidity of clouds so they create acid rain.
Answer:
I was about t ask the same question lol
Explanation:
Answer:
For flocabulary read and reaspond weather and erosion the answer is : C , i got the answer cause i got it wrong and i answered b so it is c
Explanation:
C is the correct answer
10
The reaction in which ammonia is formed is N2(g) + 3H2(g) + 2NH3(). At equilibrium, a
1-L flask contains 0.15 mol H. 0.25 mol N, and 0.10 mol NH. Calculate K., for the reaction.
11.85
23.8
25.0
16
The equilibrium constant (K) : 11.85
Further explanationGiven
Reaction
N₂(g) + 3H₂(g) ⇒ 2NH₃(g)
Required
K(equilibrium constant)
Solution
The equilibrium constant (K) is the value of the concentration product in the equilibrium
The equilibrium constant based on concentration (K) in a reaction
pA + qB -----> mC + nD
[tex]\tt K=\dfrac{[C]^m[D]^n}{[A]^p[B]^q}[/tex]
For the reaction above :
[tex]\tt K=\dfrac{[NH_3]^2}{[N_2][H_2]^3}\\\\K=\dfrac{0.1^2}{0.25\times 0.15^3}\\\\K=11.85[/tex]
The Lewis diagram for BH2 is:
[H-B-H]-
The electron- pair geometry around the B atom in BH2 is:__________.
There are______lone pair(s) around the central atom, so the geometry of BH2 is________ .
Answer:
Electron pair geometry- trigonal planar
There is one lone pair around the boron atom
The geometry of BH2 is bent
Explanation:
The valence shell electron pair repulsion theory offers a frame work for determining the shape of molecules based on the number of electron pairs of the valence shell of the central atom in the molecule.
In BH2-, the central atom is boron. There is a lone pair on boron. Owing to the lone pair on boron, the molecular geometry of BH2 is bent.
The geometry of the electron pair around the Boron atom in [tex]BH_2[/tex] is called the trigonal planar. In this case, there is a pair of isolated electrons around Boron, which is the central atom, allowing the [tex]BH2[/tex] molecule to have a folded geometry.
We can arrive at this answer because:
Boron is an element that has three electrons in its valence layer.With this, we can find out that it can make three covalent bonds or donate these electrons to achieve chemical stability.In the case of the [tex]BH_2[/tex] molecule, boron forms covalent bonds with Hydrogen.These bonds allow the Hydrogens to be positioned on either side of the Boron molecule, forcing a pair of their electrons to focus on the center of that molecule, until it is attracted to the extremities.This allows for a folded geometry around the molecule, allowing Boron to be an exception to the octet rule and achieve stability with 5 electrons in the valence layer.
More information:
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What are the coefficients for the reaction _Cl2O5 + _H2O → _HClO3 once it is balanced?
1, 1, 1
1, 1, 2
1, 2, 2
2, 1, 1
Answer:
1, 1, 2
Explanation:
Answer:
Answer is B. 1, 1, 2
Explanation:
<3
In the reaction shown below, which substance is oxidized?
2Na + CuSO4 → Na2SO4 + Cu
A. Na
B. Na2SO4
C. Cu
D. CuSO4
Answer:
Na
Explanation:
Because sodium loses one electron and becons Na+ and sodium oxidizes
Los of electron is oxidation
Na is oxidised in the given reaction 2Na + CuSO[tex]_4[/tex] → Na[tex]_2[/tex]SO[tex]_4[/tex] + Cu. Therefore, the correct option is option A.
What is oxidation?When the oxidation state of either a molecule, atom, or ion increases, this is referred to as oxidation. The inverse process is termed reduction, and it happens when electrons are gained when the oxidation status of such an atom, molecule, as well as ion lowers.
When a chemical species oxidizes, its oxidation state rises. Oxidation does not always need the presence of oxygen! The phrase was first used when oxygen induced electron loss inside a process. The present definition is broader. Na is oxidised in the given reaction 2Na + CuSO[tex]_4[/tex] → Na[tex]_2[/tex]SO[tex]_4[/tex] + Cu.
Therefore, Na is oxidised in the given reaction 2Na + CuSO[tex]_4[/tex] → Na[tex]_2[/tex]SO[tex]_4[/tex] + Cu. The correct option is option A.
To learn more about oxidation, here:
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If you were to add glucose to catalase instead of hydrogen peroxide, would bubbles be produced?
Answer:
No, bubbles would not be produced.
Explanation:
Catalase is an enzyme that catalyses the decomposition of hydrogen peroxide into water (H2O) and oxygen gas (O2). Since oxygen (O2) is a gas, it is physically noticeable as BUBBLES. However, catalase as an enzyme is substrate-specific i.e. it solely acts/breaks down on hydrogen peroxide.
Hence, If one were to add glucose to catalase instead of hydrogen peroxide, oxygen gas observed as BUBBLES will not be produced because catalase will not act on glucose.
Please help Fast I do not know
Answer:
So the answer to this question would be C. 400 J
Explanation:
Now for this problem, what is given is a 40 Newtons which would represent the force to be applied to the object, and a distance of 10 meters after the application of the said force. When these two combine, work is done. The unit for work is Joules and this is what we are looking for. The formula to get Joules or for work would be the force applied to the object multiplied by the distance that it travelled after the application of the force. It looks like this
work = force x distance
Joules = Newtons x meter
so let us substitute the variables to their corresponding places
Joules = 40 N x 10 m
Joules = 400 J
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Uncontrolled energy:
causes destruction
produces order
can make things
can do useful work
Answer:
causes destruction
Name the following hydrocarbon:
CH3CH2CH2CH2F
A. 4-fluorobutane
B. 2-fluorobutane
C. 1-fluorobutane
D. 1-fluoropentane
Answer:
The correct answer is (C)
Which is "1-fluorobutane"
Explanation:
Hope this helped if so please leave a "Rating" and "Like" and MARK me Brainliest if it was the BEST answer! THANKS! :)
The name of the hydrocarbon CH3CH2CH2CH2F is 1-fluorobutane.
In naming organic hydrocarbons, we count the number of the parent chain family. Here, we have an alkane with 4 carbons, which means that the parent chain is a family of alkane. The fourth compound in the family of an alkane is butane.
Afterwards, we will determine if there is any substituent attached to any of the carbon atoms in the chain and rank them in a way such that we have the lowest possible number.
Here, the fluorine is attached to the first carbon atom. So, it becomes 1-fluorobutane.
Learn more about the naming of hydrocarbons here:
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Help me if you know this pleaseeee
Answer:
help you with what?
Explanation:
trachea
Meaning of trachea
Answer:
The trachea, also called the windpipe, is a cartilaginous tube that connects the larynx to the bronchi of the lungs, allowing the passage of air, and so is present in almost all air-breathing animals with lungs. The trachea extends from the larynx and branches into the two primary bronchi. At the top of the trachea the cricoid cartilage attaches it to the larynx. The trachea is formed by a number of horseshoe-shaped rings, joined together vertically by ligaments over their substance and by the trachealis muscle at their ends. The epiglottis closes the opening to the larynx during swallowing.
Explanation:
You asked I answered.
Hope this helped! :)
P.S. If you still don't get where the trachea is, look at the graph below. :)
What is the name of Bel on the periodic table
Answer:
Nobelium or Beryllium
What does a useful scientific explanation include ??
Answer: scientific explanation
Explanation:
A really good scientific explanation should do two main things: It should explain all the observations and data we have. It should allow us to make testable predictions that we can check using future experiments.
What are the rules for writing
names/formulas for covalent
compounds? Give examples
where you need to produce
the formula from the name
AND the name from the
formula
Answer:
When naming molecular compounds prefixes are used to dictate the number of a given element present in the compound. ” Mono-” indicates one, “Di-” indicates two, “Tri-” is three, “Tetra-” is four, “Penta-” is five, and “Hexa-” is six, “Hepta-” is seven, “Octo-” is eight, “Nona-” is nine, and “Deca-” is ten.
What type of minerals make up more than 90% of the earth's crust?
sulfites
silicates
stalagtites
hematites
Answer:
Rocks
Explanation:
Answer:
silicate
Explanation:
Potassium Phthalate, KC8H604, is a main source of whistle fuel for many fireworks. A standard firework had 25g of potassium phthalate. Calculate the following:
The molar mass of the compound.
How many molecules of fuel there are
The number of moles of Carbon
Answer:
Explanation:
The given compound is:
KC₈H₆O₄
Mass of the compound = 25g
Molar mass of the compound
KC₈H₆O₄
Atomic mass of K = 39
C = 12
H = 1
O = 16
Molar mass of the compound = 39 + 8(12) + 6 (1) + 4(16)
= 205g/mol
Number of molecules of fuel there in:
Find the number of moles then convert this to number of molecules;
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Number of moles = [tex]\frac{25}{205}[/tex] = 0.12mol
1 mole of a compound contains 6.02 x 10²³ molecules
0.12 mole of the phthalate will contain 0.12 x 6.02 x 10²³ =
7.34 x 10²²molecules
Number of moles of Carbon
1 mole of the phthalate contains 8 mole of carbon
0.12 mole of the phthalate will contain 0.12 x 8 = 0.96mole of carbon
What is electronegativity?
Explain the periodic trend -
what is it, why is it that way
Answer:
Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons. The Pauling scale is the most commonly used. Fluorine (the most electronegative element) is assigned a value of 4.0, and values range down to caesium and francium which are the least electronegative at 0.7.
Explanation:
Major periodic trends include: electronegativity, ionization energy, electron affinity, atomic radius, melting point, and metallic character. ... These trends exist because of the similar atomic structure of the elements within their respective group families or periods, and because of the periodic nature of the elements
which group or groups of atoms are the only atoms with f orbitals?
Answer:
Lanthanides and Actinides
Explanation:
If I change the volume of a solution from 5.00 L to 10.0 L, what was the new
concentration if the original concentration was 4.0 M? Please help me as soon as possible with explanation.
The new concentration = 2 M
Further explanationDilution is a process of decreasing the concentration of a solution by adding a number of solvents
Can be formulated
M₁V₁=M₂V₂
M₁ = Initial Molarity
V₁ = Initial volume
M₂ = Final Molarity (after dilution)
V₂ = Final volume (after dilution)
V₁=5 L
V₂=10 L
M₁=4 M
The new concentration(M₂) :
[tex]\tt M_2=\dfrac{V_1.M_1}{V_2}\\\\M_2=\dfrac{5\times 4}{10}\\\\M_2=2~M[/tex]
What would have a higher boiling point water or hydrocarbon ( from penny liquid stacking) and why?
Answer:
High amount of energy is required to dissociate these bonds and hence water molecules have a higher boiling point than expected.
Explanation:
The balanced equation for the syntheis of Iron (I) oxide is below:
If 5.4 moles of Fe react with 4.7 moles of O2, what is the maximum amount of Fe2O3 (in moles) that can be produced? What is the limiting reactant?
a
3.1 moles of Fe2O3 is the maximum amount that can be produced. Oxygen is the limiting reactant.
b
2.7 moles of Fe2O3 is the maximum amount that can be produced. Iron is the limiting reactant.
c
7.1 moles of Fe2O3 is the maximum amount that can be produced. Oxygen is the limiting reactant.
d
10.8 moles of Fe2O3 is the maximum amount that can be produced. Iron is the limiting reactant.
Answer:
Option B. 2.7 moles of Fe2O3 is the maximum amount that can be produced. Iron is the limiting reactant.
Explanation:
The balanced equation for the reaction is given below:
4Fe + 3O2 —> 2Fe2O3
From the balanced equation above,
4 moles of Fe reacted with 3 moles of O2 to produce 2 moles of Fe2O3.
Next, we shall determine the limiting reactant. This can be obtained as follow:
From the balanced equation above,
4 moles of Fe reacted with 3 moles of O2.
Therefore, 5.4 moles of Fe will react with = (5.4 × 3)/4 = 4.05 moles of O2.
Thus, we can see that only 4.05 moles out of 4.7 moles of O2 given is needed to react completely with 5.4 moles Fe. Therefore, Fe is the limiting reactant and O2 is the excess reactant.
Finally, we shall determine the maximum amount of Fe2O3 produced from the reaction.
In this case, the limiting reactant will be use because it will produce the maximum amount of Fe2O3 as all of it is used up in the reaction.
The limiting reactant is Fe and the maximum amount of Fe2O3 produced can be obtained as follow:
From the balanced equation above,
4 moles of Fe reacted to produce 2 moles of Fe2O3.
Therefore, 5.4 moles of Fe will react to produce = (5.4 × 2)/4 = 2.7 moles of Fe2O3.
Summary:
Limiting reactant => iron (Fe)
Maximum amount of Fe2O3 produce = 2.7 moles
Before we can use this equation for
calculations we must first balance it.
What whole number should be placed in the
green box to balance this equation?
2C2H6 + [? ]02 → [ ]CO2 + [ ]H20
Remember, the coefficients should be the
smallest whole numbers possible.
Answer:
2C₂H₆ + [7]O₂ → [4]CO₂ + [6]H₂O
Explanation:
Chemical equation:
C₂H₆ + O₂ → CO₂ + H₂O
Balanced chemical equation:
2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O
Step 1:
2C₂H₆ + O₂ → CO₂ + H₂O
Left hand side Right hand side
C = 4 C = 1
H = 12 H = 2
O = 2 O = 3
Step 2:
2C₂H₆ + O₂ → 4CO₂ + H₂O
Left hand side Right hand side
C = 4 C = 4
H = 12 H = 2
O = 2 O = 9
Step 3:
2C₂H₆ + O₂ → 4CO₂ + 6H₂O
Left hand side Right hand side
C = 4 C = 4
H = 12 H = 12
O = 2 O = 14
Step 4:
2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O
Left hand side Right hand side
C = 4 C = 4
H = 12 H = 12
O = 14 O = 14
for each pair of compounds below , identify the one that would be expected to have more ionic character.explain you choice. (a)NaBr or HBr (b)BrCl or FCl
Answer:
a)NaBr
b)FCl
Explanation:
To identify which compound is more ionic we will calculate the electronegativity difference.
A) NaBr
Electronegativity of Na = 0.93
Electronegativity of Br = 2.96
Electronegativity difference = 2.96- 0.93 = 2.03
HBr
Electronegativity of H = 2.2
Electronegativity of Br = 2.96
Electronegativity difference = 2.96 - 2.2 = 0.76
NaBr have more ionic character because of large electronegativity difference.
B) BrCl
Electronegativity of Cl = 3.16
Electronegativity of Br = 2.96
Electronegativity difference = 3.16 - 2.96 = 0.2
FCl
Electronegativity of F = 3.98
Electronegativity of Br = 2.96
Electronegativity difference = 3.98 - 2.96 = 1.02
FCl have more ionic character because of large electronegativity difference.
NEED HELP PLZ ASAP!!!!!
Which of the following are examples of QUALITATIVE data? (seiect all that apply)
None these is qualitative data
The sound of a person's voice
The weight of person
The hair color of a person
The body temperature of a person
Answer:
The hair color of a person
Explanation:
The correct answer would be the hair color of a person.
Qualitative data are data that cannot be measured with any instrument but can only be used to characterize. Unlike quantitative data, these kinds of data can only be observed and recorded but cannot be assigned numerical values, except if coded.
The sound of a person's voice can be quantitative on one hand and qualitative on the other. The intensity of a sound can be measured using a decibel meter and quantitatively assigned a figure, whereas, the quality of the sound can only be characterized and not measured.
Both the weight and the body temperature of a person can be measured using a weighing balance and a thermometer respectively and hence, are considered to be quantitative data when collected.
The color of the hair of a person cannot be measured but can only be observed and characterized. Hence, hair color data constitute qualitative data.
Answer:
hair color
Explanation:
ANSWERS PLEASE HELP 20 MINUTES LEFT????!!!!?!!???
Answer:
Explanation:
b
Scientists use _____ as chemical symbols.
dots
letters
shapes
lines
Answer:
Letters
Explanation:
Answer:
Letters
Explanation:
Chemical symbols are used to standardize the 'language of chemistry' and to identify elements and atoms in a chemical formula easily. Chemical symbols consist of one or two letters, most often derived from the name of the element.
how dose dissolving sugar in water show that matter is made up of particles
Answer:
When sugar dissolves, the sugar particles separate from each other and mix with the water particles. When the sugar particles separate, the smaller water particles fit into the spaces between the larger sugar particles. The water and sugar particles are attracted to each other, so they move closer together when they mix.
Explanation:
: )
SOMEBODY ONCE TOLD ME THE WORLD WAS GONNA ROLL ME
I AIN'T THE SHARPEST TOOL IN THE SHED~
SHE WAS LOOKING KINDA DUM WITH HER FINGER AND HER THUMB
IN THE SHAPE OF AN "L" ON HER FOREHEAD~
WELL THE YEARS START COMING AND THEY DON'T STOP COMING
FED TO THE RULES AND I HIT THE GROUND RUNNING
DIDN'T MAKE SENSE NOT TO LIVE FOR FUN
YOUR BRAIN GETS SMART BUT YOUR HEAD GETS DUM
SO MUCH TO DO, SO MUCH TO SEE--
SO WHATS WRONG WITH TAKING THE BACKSTREETS?
YOU'LL NEVER KNOW IF YOU DON'T GO
YOU'LL NEVER SHINE IF YOU DON'T GLOW!
Answer:
Hey now, you're an all-star, get your game on, go playHey now, you're a rock star, get the show on, get paidAnd all that glitters is goldOnly shooting stars break the moldIt's a cool place and they say it gets colderYou're bundled up now, wait 'til you get olderBut the meteor men beg to differJudging by the hole in the satellite pictureThe ice we skate is getting pretty thinThe water's getting warm so you might as well swimMy world's on fire, how about yours?That's the way I like it and I'll never get boredHey now, you're an all-star, get your game on, go playHey now, you're a rock star, get the show on, get paidAll that glitters is goldOnly shooting stars break the moldAll aboard Ha ha ha ha ha ha ha
Ay, ay, ay, ay, ay, ay, ay
Crazy, but that's how it goes
Millions of people living as foes
Maybe it's not too late
To learn how to love
And forget how to hate
Mental wounds not healing
Life's a bitter shame
I'm going off the rails on a crazy train
I'm going off the rails on a crazy train
Let's go
I've listened to preachers
I've listened to fools
I've watched all the dropouts
Who make their own rules
One person conditioned to rule and control
The media sells it, and you live the role
Mental wounds still screaming
Driving me insane
I'm going off the rails on a crazy train
I'm going off the rails on a crazy train
I know that things are going wrong for me
You gotta listen to my words, yeah