Answer:5000 i think
Explanation:
Can someone help me with the rest of the questions pls
Answer:
2. About 138 g of KI will dissolve in 100 g of water at 10°C
3. 34.5 g of KI will dissolve in 25 g of water
4. The solution is not saturated but is unsaturated
Explanation:
From the graph:
1. KI is more soluble than KCl at 10°C because approximately 138g of KI dissolves at 10°C compared to 30 g of KCl per 100 g of water
2. About 138 g of KI will dissolve in 100 g of water at 10°C
3. 138 g of KI dissolves in 100 g of water at 10°C
In 25 g of water which is 1/4 × 100 g of water, 138/4 g = 34.5 g of KI will dissolve
Therefore, 34.5 g of KI will dissolve in 25 g of water
4.At 20 °C, a saturated solution of NaNO₃ will contain about 88 g of NaNO₃ in 100 g of water.
The solution prepared by the chemist contains 45 g of NaNO₃ in 100 g of water at 20 °C. The amount of solute present in the solution is less thanthe solvent can dissolve at that temperature, therefore, the solution is not saturated.
Which is one factor that increases the speed of a sound wave? A. higher temperature B. lower temperature C. traveling in a liquid rather than a solid D. traveling in a gas rather than a liquid
Answer: c
Explanation:
GIVING BRAINLIEST TO CORRECT ANSWER
Friction__
A. happens whenever work is done
B. occurs when objects rub against each other
C. releases energy as heat
D. all of the above
Answer:
B) occurs when objects rub against each other
Explanation:
Answer:
B. occurs when objects rub against each other
Explanation:
Friction is a force between two surfaces that are sliding, or trying to slide, across each other. ... Friction always works in the direction opposite to the direction in which the object is moving or trying to move. Friction always slows a moving object down.
what is the difference between the mitochondria and the excretory system?
Answer:
Mitochondria is a membrane-bound organelle stored in cells and their function is to generate chemical energy to power the cell's biochemical reaction.
The excretory system is an organ system that eliminates wastes, prevents harmful accumulation of chemicals in the body, and maintains the body's chemical concentration.
Explanation:
PLEASE HELP IMMEDIATELY
Answer:
Ability to move
Must be able to eat
grow and develop
reproduce
respond to environment
taking in food
Explanation:
Hope this helped! Have a good day!
where do these all go?
Answer:
The one inside with "+"--- Protons
The grey ones inside--neutrons
The ones on the electron orbits---electron
Everything is called an atom
Explanation:
Energy is transferred from an organism to the physical environment through __________.
A. respiration
B. heat loss
C. photosynthesis
D. consumption
Gas A has a partial pressure of 6 atm. Gas B has a partial pressure of 2 atm.
What is the partial pressure of Gas C, if the total pressure of the combined
gases is 10 atm?
Answer:
2 atm
Explanation: add both partial pressures and subtract from total pressure
how does carbon apply to real life
Answer: This is the magic element for everything on Earth. All life on Earth depends on carbon (C). It is in nearly every biological compound that makes up our bodies, systems, organs, cells, and organelles. When you breathe out, there is a lot of carbon dioxide (CO2).
Explanation:
Answer:
Like Carbon dioxide? or just like carbon? well anyway we breath in oxygen and breath out carbon the carbon goes into the air and gets re-cleaned turned into oxygen again. And also thousands of cars that run everyday going places let out tons of carbon into the the air every minute. (aka which is bad for human society, considering there's probably more carbon in the air then there is oxygen.)
Explanation:
So yes carbon does apply in everyday life. By the way the other person is right too. :)
Similarities between manner of death and cause of death
Answer:
The cause of death is the specific injury or disease that leads to death. The manner of death is the determination of how the injury or disease leads to death.
Explanation:
.
How would you prepare a 1 L solution of 3 M MgO?
Answer:
You need to measure 120.9132 grams of MgO and add to 1 liter of distilled water in a beaker.
Explanation:
Capital M stands for molarity, or moles/liter. So 3 M MgO means 3 moles per liter of MgO.
1 L × [tex]\frac{3 moles MgO}{1 L MgO}[/tex] = 3 moles MgO
This means you need to measure 3 moles MgO to put into 1 Liter of water.
But you don't know how much that is, so you need to convert moles to grams.
First you need to find how many grams are in 1 mole of MgO.
You can search the molar mass of MgO online to get: 40.3044 g
But if you don't have the internet, use the periodic table to add the masses of Mg and O: 24.305 g + 15.999 g = 40.3044 g
Then write the fraction so that the units cancel out, so you get grams by itself on the top of the fraction.
1 L × [tex]\frac{3 moles MgO}{1 L MgO}[/tex] × [tex]\frac{40.3044 g MgO}{1 mole MgO}[/tex] = 120.9132 g MgO
You need to measure 120.9132 grams of MgO and add to 1 liter of distilled water.
We will prepare 1 L solution of 3 M MgO, by dissolving 120.91 grams of MgO in 1 litre of water.
How molarity is define?Molarity is define as the no. of moles of solute dissolve in per liter if solvent or solution & it is represented as:
M = n / v
In the question, it is given that:
Molarity of MgO = 3M i.e. 3 moles of MgO is present in 1 liter of solution.
So, we have moles of MgO = 3 moles
Now, we convert moles of MgO to grams to know how much of solute is required, in the following manner:
n = W / M, where
M = molar mass of MgO = 40.30 g/mole
W = to find?
W = 3 mole × 40.30 g/mole = 120.91 grams
Hence, 120.91 grams of MgO is required.
To know more about molarity, visit the below link:
https://brainly.com/question/14469428
__H2 + __O2 --> __H2O
If 42.3 moles of water are produced, how many moles of hydrogen gas was reacted?
Answer:
42.3moles
Explanation:
The chemical equation given in this question is as follows:
H2 + O2 → H2O
However, this equation is unbalanced, the balanced chemical equation is as follows:
2H2 + O2 → 2H2O
This equation shows that;
2 moles of hydrogen gas (H2) will produce 2 moles of water (H2O)
Hence, If 42.3 moles of water (H2O) are produced, 42.3 × 2/2
= 42.3moles of hydrogen was reacted.
what is Newton first law
Answer:
law of inertia hope it helps
Explain whether chromium is more or less reactive than aluminium.
Answer: Chromium is less reactive as compared to Aluminium as it can not easily electrons as aluminium.
Explanation:
The arrangement of metals in a series according to the decreasing order of their reactivity is called reactivity series.
The metals that are placed above hydrogen are more reactive and those below hydrogen are less reactive.
A metal placed above another metal can displace lower metal from its salt solution. Thus a metal placed above in series is more reactive than metals placed below it.
As aluminium can easily lose electrons as compared to chromium , it is more reactive than Chromium.
I'm sorry for asking so many questions this assignment is past due and I need it done NOW
Answer:
7N to the right
Explanation:
the water cycle is continuous process by which ______ moves from Earth's surface to the atmosphere and back again. This cycle is driven by the energy from the ____ and the by the force of______.
Answer:
1-water 2-Sun 3-Gravity
We have observed evidence that when M-NM compounds are dissolved, the metal particles tend to form positively charged ions (cations), while non-metal particles tend to form negatively charged ions (anions).
a. True
b. False
Answer:
a. True
Explanation:
From Thomson's Plum Postulate on Pudding model of an atom, he posits that particle includes electrons that are encircled by a circle of positive charge to adjust the negative charges of electrons, which is fundamentally the same as way like negatively charged "plums" is getting encased by positively charged pudding.
Hence, the above statement is true.
An object accelerates at 8 m/s2 when a force of 40 N is applied to it. What is the mass of the object
Answer:
f=ma
40=m*8
m=5kg
another object of same mass is added
=>m=5+5=10kg
f=10*8=80N
Explanation:
What is plotted on the Y axis
Speed
Distance or time
You have 45.2 liters of SO2. This would be equal to
grams of S02
• Use ROUNDED masses from the periodic table in your calculations
• Answer can ONLY include numbers, no units
• Answer should be 3 digits (no decimals)
Answer:
you speak spanish
speak spanish
6. Put the sentences in order to show how electrical energy is produced at a coal-fired
electric power plant.
a. The turbine spins a shaft connected to
a generator.
b. Coal is burned in a furnace through
combustion.
c. Kinetic energy is converted to electrical
energy.
d. Pressurized steam is used to spin a
turbine.
e. Heated water is vaporized inside a boiler.
Could a copper metal container be used to store a solution of silver nitrate
Answer:
a
Explanation:
because that is .y answee
Science has had no negative impacts on society. Please select the best answer from the choices provided T F
Answer:
false
Explanation:
not all science is good, or has good effects
False.
Science can possibly be dangerous when used by the wrong people. It can be used to create bombs, bioweapons, and much more.
Please mark Brainliest if this was helpful, and let me know if you have questions! :)
What was the niche of the lion king
Answer:
Known as the "king of the jungle" or the "king of beasts," lions are at the top of the food chain, and they hunt and eat other animals to survive. Their niche in the ecosystem allows them to help with other animal population control and prevent the spread of disease.
Explanation:
I need a tutor!!! I really wanna learn but my professor has a language barrier. How many grams of oxygen are required to react with 2.05 g of dihydrogen sulfide?
Even when an object appears to be at rest, its atoms and molecules are in constant motion
A.true
B.false
(6th-grade science please help)
Answer:
the answer is True
Explanation:
the answer is True
the lungs are covered with a thin layer called ________
interstitium
#keeponlearning
Answer:
pleura
Explanation:
The lungs are covered by a thin tissue layer called the pleura. The same kind of thin tissue lines the inside of the chest cavity -- also called pleura.
how many moles are contained 80.3 gram of sm(no3)3
0.239 mol Sm(NO₃)₃
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableMolesStoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 80.3 g Sm(NO₃)₃
[Solve] moles Sm(NO₃)₃
Step 2: Identify Conversions
[PT] Molar Mass of Sm - 150.36 g/mol
[PT] Molar Mass of N - 14.01 g/mol
[PT] Molar Mass of O - 16.00 g/mol
Molar Mass of Sm(NO₃)₃ - 150.36 + 3[14.01 + 3(16.00)] = 336.39 g/mol
Step 3: Convert
[DA] Set up: [tex]\displaystyle 80.3 \ g \ Sm(NO_3)_3(\frac{1 \ mol \ Sm(NO_3)_3}{336.39 \ g \ Sm(NO_3)_3})[/tex][DA] Divide [Cancel out units]: [tex]\displaystyle 0.238711 \ mol \ Sm(NO_3)_3[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
0.238711 mol Sm(NO₃)₃ ≈ 0.239 mol Sm(NO₃)₃
Which of the following has the most number of atoms
Answer:
Explanation:
where is the pic?
Answer:
what are the following? if you can provide them I can try to answer it for you
Explanation:
i need this answer can someone help me???
Answer:
how has your day been if it's night or the middle of the day
Explanation:
tell me and i hope u have a better or even better day tomorrow