What is one common boating hazard in Sydney Australia
Answer:
seals
Explanation:
Please help thank you!!!!
Answer:
0.4 mol
Explanation:
We will use the formula:
n = cv
n is the number of moles, c is the concentration/molarity, v is the volume in LITRES.
Step 1: convert the volume to Litres. 500 mL is 0.5 Litres
Step 2: apply the formula
n= (0.8)(0.5)
n = 0.4 mol
Due tomorrow: What element is in group 18, period 1
Answer: helium
Explanation: it’s in the very last column (group) and the first row (period)
Mia wanted to know how Earth's movements created new landforms. She decided to read about folded mountains and their characteristics because
she had seen them in the Alps. Which of the following statements describe characteristics of folded mountains? Choose the three statements that apply
A They contain a combination of both anticlines and synclines
B. The crust deforms and bends but it does not break
C. The crust breaks into large chunks to form a series of sharp peaks
D. The folds can bend upward and form mountains
0 0 0
E The folds form in ridges over the top of divergent boundaries
F. They can cause Earth's crust to thin during mountain formation
Answer:
C. the crust breaks into large chunks to form a series of sharp peaks
Explanation:
plates are extremely thin and they can either collide and fuse or simply break. This causes mountains like the Alps and may cause volanic explosions as well.
https://www.nps.gov/subjects/geology/plate-tectonics-collisional-mountain-ranges.htm <- this article may be of interest to you.
The crust breaks into large chunks to form a series of sharp peaks. This describe characteristics of folded mountains. Therefore, the correct option is option C.
What is folded mountains?Mountains that have been folded are a result of compressive forces produced by endogenetic forces that originate inside the earth. These mountains, which may be found on all continents, are the tallest and largest in the globe.
Folded mountains are distributed throughout the world in a pattern that indicates that they are typically located along the edges of the continents, either in a north-south or an east-west direction. The crust breaks into large chunks to form a series of sharp peaks. This describe characteristics of folded mountains.
Therefore, the correct option is option C.
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What precautions need to be taken for working with the nucleophilic medium? What does it consist of?
A precaution that needs to be taken for working with the nucleophilic medium is ensuring the stability of the carbonation intermediate formed and Steric hindrance.
Discussion:
The likelihood of a nucleophilic substitution reaction proceeding by a dissociative mechanism depends to a large degree on the stability of the carbocation intermediate that forms.
Steric hindrance: Reactions where nucleophiles attack carbon-based electrophiles are significantly more sensitive to steric effects, because empty orbitals on carbon are not as accessible.
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Consider this reaction involving an unknown element X. F2+2XBr⟶Br2+2XF When 1.300 g of XBr reacts, 0.7241 g of Br2 is produced. Calculate the molar mass of X, and then identify its element symbol.
The molar mass of X would be 63.55 g/mol and the chemical symbol of X would be Cu (copper).
From the equation of the reaction: F2+2XBr⟶Br2+2XF
The mole ratio of XBr to Br2 is 2:1
Mole of Br2 = mass/molar mass
= 0.7241/159.808
= 0.004531 mole
Mole of XBr = 2 x mole of Br2
= 2 x 0.004531
= 0.009062 mole
Molar mass of XBr = mass/mole
= 1.300/0.009062
= 143.456 g/mol
Since the molar mass of Br is 79.904, the molar of X would be:
143.456 - 79.904
= 63.55 g/mol
Hence, X would be Cu.
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20 N 50 N SS what is the net force
Answer:
If it is 20 N and 50 N then, the net force would be 70 N if they are on the same side
Explanation:
Are they on the same side?
How did Avogadro know that a mole is exactly equals to 6.022×10²³ Particles?
Answer:
Avogadro's number is an absolute number: there are 6.022×1023 elementary entities in 1 mole. This can also be written as 6.022×1023 mol-1. The mass of one mole of a substance is equal to that substance's molecular weight.
The Law of Multiple Proportions states that if two elements can combine to form two different compounds, the masses of the one element that can combine with a fixed amount of the other element will be in a ratio of small whole numbers.
True False
Answer:
law of multiple proportionsA law stating that if two elements form a compound, then the ratio of the mass of the second element and the mass of the first element will be small whole number ratios.
Explanation:
10. The molar mass of an unknown gas was measured by an effusion experiment. It was found that it took 63 s for the gas to effuse, whereas nitrogen gas (N2) required 48 s. The molar mass of the unknown gas is closest to- A) 24 g/mol B) 37 g/mol C) 16 g/mol D) 32 g/mol E) 48 g/mol
Answer:
chu papi
Explanation:
You work in an analytical testing lab and have been asked by your supervisor to purchase new pH meters to replace your old supply. You have identified four potential suppliers and now need to evaluate the performance of each pH meter.
You obtained a solution with a known pH of 5.5. You performed 10 replicate
measurements of the pH of that known solution using each of the four different pH meters and obtained the data shown below.
All other factors being equal (cost, ease of use, etc), which brand would you suggest the lab purchase? Explain your reasoning.
The pH meter brand B is the most accurate pH meter as compared to other pH meter.
I will suggest the pH meter brand B the lab to purchase because the readings of this pH is more accurate as compared to other three pH meters. The pH meter brand B provides data which is closer to the known pH of the solution.
While on the other hand, pH meter brand A, C and D gives less accurate data in which more error is present in the data so we can conclude that the pH meter brand B is the most accurate pH meter as compared to other pH meter.
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NaOH + H₂SO4 -> Na2SO4 +H20 balance the equation
Answer:
2NaOH + H₂SO4 -> Na2SO4 + 2H2O
Explanation:
NaOH + H₂SO4 -> Na2SO4 +H2O
2NaOH + H₂SO4 -> Na2SO4 + 2H2O
Answer:
2NaOH + H₂SO4 -> Na2SO4 + 2H2O
Explanation:
2*H+2H=2*2H
2*Na=Na2
2*O+O4=O4+2*O
s=s
Compound X has a solubility of. 30g in 100g of water at 20c what is the minimum amount of water, in grams, that is needed to dissolve 90g of compound X
A sample of a compound is decomposed in the laboratory and produces 72.1 g carbon, 12.1 g hydrogen, and 48.0 g oxygen. Calculate the empirical formula of the compound.
Answer:
empirical formula is C6H12O3
Explanation:
A sample of a compound is decomposed in the laboratory and produces
72.1 g carbon, 12.1 g hydrogen, and 48.0 g oxygen. Calculate the empirical formula of the compound.
divide the gm by the atomic mass and ratio the results
C=72.1/12.01 =6.00
H = 12.1/1.01 = 11,98 =~12
O =48.0/16 = 3
empirical formula is C6H12O3
What is accumulation??
Answer:
Accumulation is something that's building up. For example, "My trash accumulates every Saturday."
4. Find the value of Y in AU. HINT: Convert the km to AU using: 1AU = 150 MILLION kilometers
The diagram below shows the position of the sun and two galaxies, G1 and G2. The distance between the two galaxies is represented by Y.
600 billion km
SUN
G1
G2
400 billion km
OVS
What is the value of Yin AU? (3 points)
The value of Y in AU for the distance between the sun and the two galaxies is 1,333.3 AU.
The given parameters;
position of the sun, G1 = 600 billion kmposition of OVS, G2 = 400 billion kmThe distance between the sun and the two galaxies is calculated as follows;
Y = 600 billion km - 400 billion km
Y = 200 billion km
150 million km = 1 AU
200 billion km = ?
[tex]\frac{1 \ AU}{150 \times 10^6 \ km} \times 200 \times 10^9 \ km= 1,333.3 \ AU[/tex]
Thus, the value of Y in AU for the distance between the sun and the two galaxies is 1,333.3 AU.
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How many moles of ions are produced from dissociation of 1 mol of NH4Br
Answer:
2 mol
Explanation:
NH4Br = NH4+ + Br-
1 mole of NH4+ and 1 mole of Br.
how do the joints help to facilitate movement
Answer:
Joints are movable connections between two bones. ... It provides a smooth surface to stop the bones in the joint from rubbing against each other too much. The cartilage passes the pressure in the joint on to the bone underneath it. This is especially important in joints that bear heavier loads, such as hip or knee joints
Explanation:
What is the maximum value of the secondary quantum number (l) allowed for atomic electrons with a principal quantum number n = 7?
Explanation:
Principal quantum number=n=7
Azimuthal quantum number=l:-
[tex]\\ \sf\longmapsto n-1[/tex]
[tex]\\ \sf\longmapsto 7-1[/tex]
[tex]\\ \sf\longmapsto \ell=6[/tex]
The maximum value of the secondary quantum number (l) allowed for atomic electrons with a principal quantum number n = 7 is 6.
What are quantum numbers?The term quantum number is used to describe the set of numbers that describe the position of an electron in an atom. Now we know that the secondary quantum number (l) have values from zero to n - 1.
Hence, the maximum value of the secondary quantum number (l) allowed for atomic electrons with a principal quantum number n = 7 is 6.
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Digital communication plays a very important role in modern living. Effective transmission of data, voices and images in a digital format requires a suitable material. What is the material?
Answer:
The answer is fibre optic.
Explanation:
Fibre optic is used for Effective transmission of data, voices and images in a digital format.
A gaseous mixture contains 0.545 bar H, (8), 0.517 bar N, (8), and 0.107 bar Ar(g). Calculate the mole fraction, X, of each of
these gases.
In this case, it can be see that we have a gas mixture wherein hydrogen has a partial pressure of 0.545 bar, nitrogen 0.517 bar and argon 0.107 bar and we are asked to calculate the mole fraction of each gas.
According to the given information, it turns out possible for us to use the Dalton's law in order to calculate the mole fraction of each gas in the mixture. However, we first must calculate the total pressure of the mixture by adding them all together:
[tex]P_T=0.545bar+0.517bar+0.107bar=1.169bar[/tex]
After so, we proceed to the mole fractions by dividing the pressure of each by the total one:
[tex]x_{H_2}=\frac{0.545bar}{1.169bar} =0.466\\\\x_{N_2}=\frac{0.517bar}{1.169bar} =0.442\\\\x_{Ar}=\frac{0.107bar}{1.169bar} =0.092[/tex]
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How many mL of a 0.138 M aqueous solution of chromium(III) nitrate, , must be taken to obtain 14.0 grams of the salt
Answer:
Explanation:
First you need to calculate the mole of substance and then from the molarity the volume of the substance.
note: don't forget to convert volume liter mL in molarity.
How many atoms of each element are in the following chemical reaction
3 H3PO4 + 3 KOH
Answer: K3PO4+3H2O.
Explanation:
H- 12
P- 3
O- 15
K- 3
(You need to multiply the subscript by the number in front of each compound, then add the number of each element in each of the compounds. Lmk is you need a better explanation)
this is not chemistry this is science
Answer: 2 meters
Explanation: 200 cm of flower bed
There are 100 cm in one meter.
200/100=2
Answer:
200 centimeters or 2 meters
Explanation:
It should be the same simply for aesthetic pleasure
Which of the following best describe arrangement of particles in a gas?
The particles are packed closely together and cannot move freely
The particles are spread apart and can move freely.
The particles are packed closely together and can move freely
Answer:
last one
Explanation:
makes the most sense
How much has our global temperature risen in the last 100 years? A. 5.0°F B. 10°F C. 0.5°F D. 1.0°F
Answer:
The answer is D.
Explanation:
Which of the following best describes subduction?
a more dense plate going beneath a less dense plate
one plate colliding with another
one plate destroying another
one plate dividing another
Answer:
A more dense plate going underneath a less dense plate.
What are the first 20 elements and their abbrevations
Answer:
1. Hydrogen (H)
2. Helium (He)
3. Lithium (Li)
4. Beryllium (Be)
5. Boron (B)
6. Carbon (C)
7. Nitrogen (N)
8. Oxygen (O)
9. Fluorine (F)
10. Neon (Ne)
11. Sodium (Na)
12. Magnesium (Mg)
13. Aluminum (Al)
14. Silicon (Si)
15. Phosphorus (P)
16. Sulfur (S)
17. Chlorine (Cl)
18. Argon (Ar)
19. Potassium (K)
20. Calcium (Ca)
If 79.5 mol of an ideal gas is at 8.91 atm at 47.20 °C, what is the volume of the gas?
Answer:
235L
Explanation:
PV =nRT
V = nRT/P
47.20 °C is 320.35K
V = (79.5 mol)(0.0821 atm•L/mol•K)(320.35K)/8.91atm
V = 234.6698577L
Round to 3 sig figs: 235L
Which is NOT a correct assumption related to the Kinetic Theory?
A) collisions are perfectly elastic
B) a gas is composed of particles relatively far apart from one another
C) particles in a gas move in random motion
D) intermolecular forces influence the properties a gas
E) None of all
F) no attractive or repulsive forces exist between the particles
Answer:
D
Explanation:
i took the test and got it right :)
