The number of moles of solute in a solution is the product of the molarity and volume of the solution. The number of moles in 0.045 L of 0.465 M potassium bromide is 0.0209 mol. Hence, option A is correct.
What is molarity ?Molarity of a solution is the ratio of its number of moles of solute to the volume of solution in liters. Molarity is the most common term used to express the concentration of a solution.
Molarity is a colligative property thus depends on the amount of substance and it is temperature dependant.
molarity = no.of moles/ volume in L
Given that volume of the potassium bromide solution = 0.045 L
molarity = 0.465 M
then, number of moles of potassium bromide solute = molarity × volume
no.of moles = 0.465 M × 0.045 L = 0.0209 mol.
Therefore, there are 0.0209 moles of potassium bromide is present in the solution.
To find more on molarity, refer here:
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what are some features of the deep sea vent ecosystem
(please help :) )!!!!!!!!!!!!!
Maybe this information is helpful:
The features of the ocean floor are not permanent, and are gradually changing over time due to the movement of tectonic plates. Most of the ocean floor features from close to where the plates are shifting either towards or away from each other. Marine ecosystems are found around parts of the ocean floor features, even the Mariana Trench, which is the deepest trench in the world.
How many grams of Oz would be needed to produce 1.875 moles of aluminum?
4 AI + 3 O2 -> 2Al2O3
Answer:
1.4063 moles of oxygen are required
Explanation:
Based on the chemical equation:
4Al + 3O₂ → 2Al₂O₃
4 moles of aluminium react with 3 moles of oxygen.
To solve this question we need to convert the moles of aluminium to moles of oxygen using the chemical reaction:
1.875 moles Al * (3 moles O₂ / 4 moles Al) =
1.4063 moles of oxygen are requiredWhich type of material incorporates a variety of substances to enhance desired properties such as strength and flexibility?
metals
polymers
composites
semiconductors
Answer:
Polymers
Explanation:
Please answer this in a paragraph! Don’t have to do in in Jane Schaffer Style!!!
Answer:
South of San Bernardino has more earthquakes because they have about 10,000 in a year but Cajon has about 160 earthquakes in a year therefore south San Bernardino earthquakes most didnt really damage places so 100 plus magnitude of 3.0 and only 15-20 are greater magnitude of 4.0. Cajon has less earthquakes a year and not big magnitude damages as South of San Bernardino so as you can see here we have South of San Bernardino earthquakes rising each and every year.
Explanation:
I gave the answer i will do it once more :))
Whats is tge electron configuration of Ag2+ please answer asap..
Answer:
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10
Explanation:
To write the configuration for the Silver and the Silver ion, first we need to write the electron configuration for just Silver (Ag). We first need to find the number of electrons for the Ag atom (there are 47 electrons) using the Periodic Table. When we write the configuration, we'll put all 47
Either way, the Silver electron configuration will be 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s1
Note that when writing the electron configuration for an atom like Ag and Ag+, the 4d is usually written before the 5s. Both of the configurations have the correct numbers of electrons in each orbital, it is just a matter of how the electronic configuration notation is written (see below for an explanation why).
For the Ag+, called the Silver ion, we remove one electron from 5s2 leaving us with:
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10
What are the layers of earth including the lithosphere and the asthenosphere?
Answer:
The lithosphere is the solid, outer part of the Earth. The lithosphere includes the brittle upper portion of the mantle and the crust, the outermost layers of Earth's structure. It is bounded by the atmosphere above and the asthenosphere (another part of the upper mantle) below
Explanation:
They are, in order from the exterior to the interior – the crust, the mantle, the outer core, and the inner core.
compare the wavelengths of different colors to explain why the flashing light color used in airplanes or at the top of the buildings is the red color *
An electromagnet is different from an iron magnet because
A It will require a battery pack to charge it
B. it can also be plugged in to run a toaster
C. it is created by an electric current
D. it is always painted blue
PLEASE HELP THIS IS FOR A SERIOUS TEST
Answer:
Explanation:
B
What is the mass of propane, C3H8, in a 27.5 L container of gas at STP?
Answer:
54 g
Explanation:
STP means 22.4L/mol
27.5/22.4=1.23(mol)
1.23 mol of C3H8=1.23*44= 54 g
How can you tell if an ion is a polyatomic ion if all you have is the name?
I can't seem to figure this out! Please help me out!
:)
Answer:
All the elements on the periodic table start with a capital letter and only some of them have a second letter that is lower case. So if you see two capital letters together in a ion then you will know that it is a polyatomic.
Answer: All the elements on the periodic table start with a capital letter and only some of them have a second letter that is lower case. So if you see two capital letters together in a ion then you will know that it is a polyatomic.
Explanation:
5. DNA tells amina acids how to form ?
Answer:
i dont know bcoz i am not in 10 class
Explanation:
Answer:
The type of RNA that contains the information for making a protein is called messenger RNA .
Explanation:
(mRNA) because it carries the information, or message, from the DNA out of the nucleus into the cytoplasm
calculate the number of moles of al2o3 that are produced when 3.60 mol fe is produced in the following equation. 2Al+3FeO—> 3Fe+Al2O3
Answer:
5. a
Explanation:
Al+3FeO—> 3Fe+ Al2O3
3.60—>3.60÷3=1.20 (mol)
Elements cannot be broken down into simpler substances by chemical change.
True or False?
Answer:
its is true because i think its true???
On a cold, cloudy day, the local weather forecaster predicts that a high-pressure system will be moving into the area in the next 24 hours. Which weather condition will this system most likely bring to the area?
stormy
sunny
snowy
hot
- A compound contains 4.56g. of Pb, 2.3g Cl, and 3.1g 0. What is the percent
composition for each element?
please show work
Students in Ms. King's science class are researching the history of the cell theory and will write a blog to show what they have learned. Which of the following is the best choice for the introductory sentence?
A scientific theory, like cell theory, does not change.
A hypothesis, such as one about cells, usually becomes a theory.
Scientific theories, like those written about cells, are not as important as scientific laws.
Scientific theories, such as cell theory, are based on well-supported observations of nature.
Answer:
A hypothesis, such as one about cells, usually becomes a theory.
Explanation:
When Acid Rain falls on limestone, the rock is eroded and carbon dioxide is produced.
Write a balanced equation for the reaction between calcium carbonate and nitric acid.
The formula of calcium carbonate is CaCO3
The formula of nitric acid is HNO3.
When put together:
CaCO3 + HNO3 = Ca(NO3)2 + CO2 + H2O
The balanced equation:
CaCO3 + 2HNO3 = Ca(NO3)2 + CO2 + H2O
The unit of measure for potential and kinetic energy is the
Answer:
kilograms x meters2/seconds2
Explanation:
Answer:
kilograms x meters2/seconds2
Explanation:
Actual mechanical advantage and ideal mechanical advantage are not equal. True False?
I need help asap its due today!!!!!
Use the dichotomous key to answer the question. Of the following characteristics, which was used to classify insects?
A. presence of a head
B. shape of wings
C. number of wings
D. shape of abdomen
Answer:
B. shape of wings
Explanation:
Insect, (class Insecta or Hexapoda), any member of the largest class of the phylum Arthropoda, which is itself the largest of the animal phyla. Insects have segmented bodies, jointed legs, and external skeletons (exoskeletons).
Higher classification: Hexapoda
What is a scatter plot?
A. A table of measurement data used to construct a graph
B. A display of points that shows the relationship between two sets of data
C. A graph that has several different lines scattered on a coordinate plane
D. A graph that is nonlinear
PLZ, ANSWER, AND ILL MARK YOU THE BRAINLIEST!
Explanation:
A..........is the correct answer
if it helps you then plzz mark me brainliest
Answer:
The other answer is wrong! Its...
B. A display of points that shows the relationship between two sets of data
Explanation:
Hope this helps!
If the sun is out all day, why is it not warm during an Arctic summer?
Answer:
The primary reason is that the sun is low on the horizon all day. Thus, solar energy needs to pass through more atmosphere to get to the ground.
Explanation:
Hope this helps. :)
Answer:
Most all of the visible light striking the snow or ice surface is reflected back without any particular preference for a single color. Most natural materials absorb some sunlight, which gives them their color. Clean snow, however, reflects most of the sunlight, creating a white appearance.
[ I commented on the other answer with the same little add-on, then I realised I could add an answer. Even though this is four days ago, meaning the person who asked the question doesn't need another answer, I hope to give someone else who might be looking at this some insight. ]
What is a characteristic of asexual reproduction?
Answer:
Sexual reproduction
Which point is the outlier on this scatter plot? What might the outlier represent?
A. (0.07, 18) might represent a newborn shark.
B. (0.07, 18) might represent an unusually large shark.
C. (105, 320) might represent an unusually large shark.
D. (105, 320) might represent a newborn shark.
Answer:
An outlier on a scatter plot represents something that doesn't fit.
The outlier on this scatter plot is D.(105, 320) might represent a newborn shark
1. Take a look at all the elements in period 3. What do you notice? *
5 points
A. They have the same number of energy levels
B. The number of energy levels decreases as you go across the period from left to right
C. They have the same number of valence electrons
D. The number of valence electrons decreases as you go across the period from left to right
Answer:
D
Explanation:
beacause all the elements in period 3 has different valence electrons hence you look at the first element in period 3 is sodium which has a valence electron of 1 when you go across the period to the right their valence electron decreases to be negative
Answer:
D is the correct answer i hope this is correct
in which of the following is number of neutrons correctly represented?
Answer:
²³⁸₉₂U has 146 neutrons
Explanation:
To know which option is correct, we shall determine the number of neutrons in each case. This can be obtained as follow:
For ²⁴₁₂Mg:
Mass number (A) = 24
Proton number (P) = 12
Neutron number (N) =?
A = P + N
24 = 12 + N
Collect like terms
N = 24 – 12
N = 12
Thus, there are 12 neutrons in ²⁴₁₂Mg
For ⁷⁵₃₃As:
Mass number (A) = 75
Proton number (P) = 33
Neutron number (N) =?
A = P + N
75 = 33 + N
Collect like terms
N = 75 – 33
N = 42
Thus, there are 42 neutrons in ⁷⁵₃₃As
For ¹⁹₉F:
Mass number (A) = 19
Proton number (P) = 9
Neutron number (N) =?
A = P + N
19 = 9 + N
Collect like terms
N = 19 – 9
N = 10
Thus, there are 10 neutrons in ¹⁹₉F.
For ²³⁸₉₂U:
Mass number (A) = 238
Proton number (P) = 92
Neutron number (N) =?
A = P + N
238 = 92 + N
Collect like terms
N = 238 – 92
N = 146
Thus, there are 146 neutrons in ²³⁸₉₂U
Considering the options and the illustration made above, Only ²³⁸₉₂U has the correct number of neutrons written along side.
the question is~ Where does the heat come from for geothermal energy?
Answer:
The Earth
Explanation:
Answer:
The Earth
Explanation:
Geothermal energy comes from the sub surface of the Earth. It is contained in the rocks and fluids beneath the earth's crust and can be found as far down to the earth's hot molten rock, magma.
Please help!! any inappropriate answers will be reported
Which of the below best explains the relationship between the surface area of a solid solute and the dissolution (rate it dissolves) in a solvent
Question 3 options:
As the surface rate decreases the solid dissolves faster
As the surface area increases the solid dissolves faster.
As the surface area increases the solid dissolves slower.
Surface area has no affect on the dissolving rate of the solid.
Convection currents in Earth's core transfer heat and material to the surface.
True or False?
Answer: False
Explanation: The plate tectonics move due to convection currents of the mantle; the cooler upper mantle descends while the hotter lower mantles ascend. The heat that drives these convection currents emanated from the core of the earth (not the sun).
Define Volume and give at least two units used to measure volume
