Answer:
The answer is "3.57 and 0.07".
Explanation:
Using the slop formula:
[tex]=\frac{n_2-n_1}{n_2-n_1}\\\\ =\frac{0.714-0.357}{0.20-0.10} \\\\ = ABSORPTIVITY, \ \ a=3.57 \\\\A= a\times b \times c[/tex]
Given:
[tex]A=0.250[/tex]
length path [tex]b=1[/tex]
from calibration it is found that
[tex]a=3.57\\\\consentation \ c=\frac{A}{a\times b} \\\\C=\frac{0.250}{3.57\times 1}[/tex]
[tex]=0.07 \ M[/tex]
Calculate the percent yield if the theoretical yield is 50.0 g of a
product and the actual yield is 42.0 g.
Answer:
84% yield
42/50 = 0.84 = 84%
How many moles of a gas are in a 2.2-liter balloon at 600 mmHg and 85 C. Also asks to identify the P, V, N, R, and T. If unknown then put "?"
We have that for the Question "How many moles of a gas are in a 2.2-liter balloon at 600 mmHg and 85 C." it can be said that Moles of gas is
n= 0.059 moles of gas
From the question we are told
How many moles of a gas are in a 2.2-liter balloon at 600 mmHg and 85 C. Also asks to identify the P, V, N, R, and T. If unknown then put "?"
Generally the equation for the is mathematically given as
[tex]P=\frac{600}{760}\\\\P=0.789atm[/tex]
Therefore
[tex]n=\frac{PV}{RT}\\\\Therefore\\\\n=\frac{PV}{RT}\\\\n=\frac{0.789*2.2}{0.08206*(85 + 273)}\\\\[/tex]
n= 0.059 moles of gas
Therefore
Moles of gas is
n= 0.059 moles of gas
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Which of the following is the main cause of acid rain?
water vapor
photosynthesis
ozone depletion
smog
Answer:
photosynthesis
Explanation:
Answer:
Photosynthesis
Explanation:
I had it on a quiz.
A reaction was suppose to produce 20 L of gas. Only 12 litters of gas were produced in the lab. What is the percent yield for this reaction?
Answer:
[tex]\boxed {\boxed {\sf 60 \%}}[/tex]
Explanation:
Percent yield is a ratio of the actual yield to the theoretical yield. It is found using this formula:
[tex]\% \ yield= \frac {actual \ yield}{theoretical \ yield} *100[/tex]
The actual yield is 12 liters, because that was actually produced in the lab.
The theoretical yield is 20 liters, because that was the expected yield.
[tex]\% \ yield= \frac {12 \ L}{20\ L} *100[/tex]
[tex]\% \ yield= 0.6*100[/tex]
[tex]\% \ yield= 60[/tex]
For this reaction, the percent yield is 60%.
why does iron have two kinds of valence number?
Answer:
The electronic configuration of iron is: Ar3d64s2. the two electrons in the 4s orbital are paired, and two of the electrons in the 3d orbitals are paired leaving four unpaired electrons. In general when you are populating the p, d, f, etc
Explanation:
hope dis help
How many grams are in 2.0 x 10-5 moles of uranium?
Answer choices
5.3 x 10-3 grams
4.8 x 10-3 grams
1.4 x 10-3 grams
2.2 x 10-3 grams
Answer:
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Describe how the particles are arranged in a solid, liquid, and gas.
Answer:
Particles in a: gas are well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.
Explanation:
In a covalent bond:
A. None of these.
B. One atom accepts electrons from another.
C. The atoms attract each other but their electrons do not interact.
D. Both atoms share their electrons.
Answer:
D. Both atoms share their electrons.
Explanation:
Consider 2 pots of water. Each pot has the same diameter, but pot A is deeper than pot B and so there is more water in pot A. If both pots are exposed to the same amount of heat for 5 minutes, which pot will contain the hottest water after 5 minutes? Why?
Answer:
POT B
Explanation:
Because Pot B contains lesser amount of water, it is going to have the hottest water compared to pot A.
Since the amount of heat is constant, in pot B less water molecules would share the heat, compared to pot A where a larger amount of water would have to share the heat.
What's the similarity between Gas and Liquid?
Answer:
Liquids and gases flow easily because their particles can move or slide past one another.
Explanation:
Hope this helped Mark BRAINLEST!!
Identify this reaction
HBr+ Al(OH)3 —-> H2O + AlBr3
Neutralization reaction
Hello, in the following reaction HBr is strong acid when reacts with Amphoteric Aluminium hydroxide gives water & AlBr3 as salt.
We know that in neutralization reaction
acid & bases reacts to give salt and water. Hence following reaction is neutralization reaction.
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The compound that forms between nitrogen and chlorine is
a. ionic
b. molecular/covalent
Answer:
Covalent bonding is a type of chemical bonding which is characterized by atoms sharing electrons. For nitrogen and chlorine to covalently bond, nitrogen needs 3 electrons. Chlorine only has one electron therefore two more chlorine molecules are needed. Because one atom of nitrogen needs 3 atoms of chlorine to bond, the formula will be NCl3.
Please help with these two I’ll give you brainiest!
has 2 valence electrons. It has electron shells and is reactive than Boron. This element has the same number of electron shells as has 4 valence electrons. It has electron shells and is reactive than Aluminum. This element has the same number of electron shells as
Answer:
Beryllium.
Silicon.
Explanation:
Beryllium has 2 electrons in their outermost shell and has highly reactive than boron because Boron needs 3 electrons to lose whereas, beryllium needs to lose only 2 electrons to get stability. Silicon has 4 electrons in its outermost shell and is less reactive than aluminum because aluminum has to lose 3 electrons to get stability as compared to silicon which needs 4 electrons to lose to be stable and non-reactive.
Calculate the volume occupied by 2.00 moles of H₂ at 300.0 K and 1.25 atm
Answer:
V = 39.38 L
Explanation:
Given that,
No. of moles of H₂, n = 2
Temperature, T = 300 K
Pressure, P = 1.25 atm
We need to find the volume occupied by the gas. We can use the ideal gas law to find it such that,
[tex]PV=nRT[/tex]
Where
R is gas constant, R = 0.08205 L-atm/mol-K
V is volume of the gas
Rearranging the above formula for V. So,
[tex]V=\dfrac{nRT}{P}\\\\V=\dfrac{2\times 0.08205\times 300}{1.25}\\\\V=39.38\ L[/tex]
So, the volume occupied by the gas is 39.38 L.
In a 0.100M solution of a weak polyprotic acid what is the equilibrium concentration of A-2?
H2A+H20-H30+A-2
Ka1=7.5x10^-5
Ka2=6.2x10^-8
answer= ?x10^?
Find the molar mass of PCI3
Answer: around 137.33
Explanation:
What does an organism's phenotype describe?
Answer:
The term "phenotype" refers to the observable physical properties of an organism; these include the organism's appearance, development, and behavior
An organism's phenotype describe appearance, development, behavior, maybe even levels of hormones or blood cells.
solve for v -20=-5/3v
Answer:
v = 15/2
Decimal Form:
v = 7.5
Mixed Number Form:
v = 7 1/2
Explanation:
Hope this helps!
3.0 moles of BaO are mixed evenly into a 2.0 L. What is the molarity of this
solution?
Answer: 1.5 moles/L
Explanation:
Molarity = moles/ Liters
to find the molarity of BaO: 3moles/2L = 1.5 moles/L
Which of the following is an example of a learned response?
A.
A bird avoids moths that make it sick after eating one.
B.
A person's leg moves when a doctor taps his or her leg with a mallet.
C.
A plant turns to follow the sun during the day.
D.
An adult salmon is able to return to the river where it hatched.
what part of the brain helps us process sounds?
Answer:
Temporal lobes
Explanation: They are right above the ears...And they help us process sounds...They are also important for learning and memory, as well as the understanding of language
I need help with this!
Answer:
FILTRATION.
filter the solution and separate sand and salt solution
evaporation
evaporate the water and salt mixture and salt will be left as a solid
Which of these models shows the position of the sun moon and Earth that will have the LARGEST effect on the tides? _________
Answer: Your answer is J
Explanation: This can occur when moon is closest to earth.
So the moon in between earth and sun.
Also factually the moon can effect human behavior, because humans are made up of some percent of water.
When a sound is louder what
measurement gets bigger?
Answer:
amplitude or pitch
Explanation:
CAN SOMEBODY PLS HELP...
Answer:
Maybe you could do something with nuclear power plants and how we use those to create electrical energy for our phones, houses etc?
A carrot was cut into many pieces, and moved into a freezer what change is it
Answer:
Physical change
Explanation:
Cutting and freezing are both examples of physical changes that do not alter the chemical composition or properties of the object/substance.
Answer:
physical change
Explanation:
carrot lost its original shape
When two continental plates diverge, there is a valley in between these two plates that forms as the continental crust widens. What geological event is
a result of this interaction?
A) Hurricanes
B) Volcanoes
C) Tsunamis
D) Earthquakes
Answer:
B. Volcanoes
Explanation:
B. Volcanoes
Answer:
B:Volcanoes
Explanation:
because valley rift develops
Which best explains the importance of indicator species?
Answer:
Explanation:
ndicator species (IS) are animals, plants, or microorganism used to monitor changes in our environment. For example, they can tell us about the impact of pollution on an ecosystem, or how well an impaired environment is being managed or restored.
Weather conditions (high or low temperature) to the mineral wool.
Answer:
high temperature
Explanation: