Answer:3.51 g
Explanation: M(KOH)= 39.10 + 16 + 1.008 = 56.108 g/mol
Amount of substance is n= m/M = cV and mass m= McV
Volume in litres is 0.125 l
Complete the sentence:
The north pole of a magnet____ the north pole of another magnet.
-will attract
-may repel, attract, or not affect
-will not affect
-will repel
the north pole of the magnet will repel the north pole of another magnet
1. What is a common example of a converging mirror?
2. Where must you (the object) stand in front of a converging mirror if you want to see an upright,
virtual image of yourself? What is the size of the image compared to the object?
3. A converging mirror produces no image when the object is at
4. If the centre of curvature in a converging mirror is at 10cm, the focal point will be at
om
sorry I don't know 4one
i HOPE IT'S HELP
what is my name?
chetana
ikshya
grishma
bhumika
puja
they're name of bunch of girls.
Magnetic poles are called domains.
True
False
Answer:
false
Explanation:
the magnetic domains in the area around a magnet where the force acts.
(No scammers) can someone help me pls
Answers is - 198 kilo joules
Which one is the right answers?
Which of the following best explain how Earth's rotation relates to living systems?
A. Earth’s rotation severely limits the amount of sunlight hitting a given region, which prevents living systems from surviving
B. By stabilizing temperatures for a given region, earth’s rotation helps sustain living systems in that region
C. Earth’s rotation forces many animals to migrate in order to continuously receive the Sun’s rays
D. Because Earth’s rotation brings darkness to a given region, plants are unable to survive in that region at night
Answer:
I think it's B
But A seems a good answer too
It might be D
But Imma go for C
Explanation:
Organisms change energy from the environment or from their food into other types of energy. This is called what?
Answer:
Metabolism
Explanation:
This is called Metabolism.
Metabolism is a combination of spontaneous chemical reactions which release non-spontaneous energy and chemical reactions requiring energy to proceed. In order to perform cellular processes, living organisms can take energy from food, nutrients or sunlight.
Part A
Campers want a travel cup that keeps the temperature of a beverage from changing for up to two hours.
They may want to keep a hot drink hot when they are in a cold place. Or they may want to keep a cold drink
from warming up in a hot environment,
Describe how you plan to design, build, and test a travel cup that uses thermal insulators?
The statement is "thermal insulators of a double-layered vacuum seal make a liquid heated when it's cold and keep it cool when it's hot."
What is thermal insulator?A thermal insulator is a material that inhibits heat from being conveyed from one location to another.
Campers seek a travel cup that cools liquids with a cold pack. Design the exterior portion of the cup to keep the drink cold after it has cooled down, as well as the interior compartment to contain the cold pack and channel heat from the liquid in the cup. One of the greatest ways to keep your coffee hot for a long time is to use vacuum insulation in a thermos. On the surface, the concept appears straightforward.
To know more about thermal insulators here
https://brainly.com/question/1033537
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In Belize City, on a cloudy day the temperature is 24 degrees Celsius. This is equal to how much in Fahrenheit. *
What causes the release of energy in an exothermic reaction? Bonds breaking Bonds breaking A catalyst A catalyst Bonds being formed Bonds being formed Electrons escaping the bond
Answer:
weak bonds break and strong bonds form
Explanation:
An exothermic reaction is a chemical reaction in which heat energy is evolved during the reaction process.
Bond formation requires energy while bond breakage releases energy. More energy is needed for the formation of weak bonds as compared to strong bonds.
Hence, when weak bonds break, they release more energy than needed to make a corresponding strong bond leading to the release of the remaining energy as heat.
H2CO: → H2O + CO2
Answer the following question about the equation above.
1. How many atoms of Hydrogen are in the reactant?
2. How many atoms of Carbon are in the reactant?
3. How many atoms of Oxygen are in the reactant?
4. How many atoms of Hydrogen are in the product?
5. How many atoms of Oxygen are in the product?
6. How many atoms of Carbon are in the product?
7. Does the number of atoms of each element on the reactant side match that of the product side?
Answer:
1) 2
2) 1
3)1
4) 2
5)3
6)1
7)yes except Oxygen
A football is moving upwards towards its peak after having been booted by the punter.
Answer:
draw a square with an errow pointing down
Explanation:
What does the reaction rate measure?
O A. The collisions per second
O B. The speed of the reaction
C. The reaction activation energy
O D. The moles per liter of product
Answer:
The speed of the reaction
Explanation:
I just took the test and got it right... i hope this helps u :)
what is the ionic equation for dilute hydrochloric acid and magnesium
Answer:
Mg(s) + 2H⁺(aq) ⟶ Mg²⁺(aq) + H₂(g)
Explanation:
A net ionic equation shows all the ionic substances as ions and shows the correct state of each substance.
Magnesium react with hydrochloric acid according to the equation :
Mg(s)+2HCL(aq)----->MgCL2(aq) +H2(g)
This demonstration can be used to illustrate the characteristics reactions of metals with acid , a single replacement reaction ,or to demonstrate the generation of hydrogen gas.
What is metallurgy?
A. Science of minerals.
B. Science of working with metals.
C. Science of breaking down rock.
D. Science of volcanoes.
Answer:
B science of working with metals
what is the formula for water
Answer:
H2O
Explanation:
EASIEST FORMULA ON EARTH
How can you control the flow of power in a circuit?
There are multiple ways to prevent these situations from occurring. The three most common protective devices are fuses, circuit breakers, and surge protectors
Explanation:
(12) Magnesium metal burns very brightly to produce heat and a white solid.
What type of chemical reaction is taking place?
An endothermic
B exothermic
C reduction
D thermal decomposition
Answer:
exothermic
Explanation:
heat/energy is released when it burns.
The air we breathe is a(n) _____.
What is the Great Red Spot on Jupiter?
Answer:
The Great Red Spot is a storm in Jupiter's southern hemisphere with crimson-colored clouds that spin counterclockwise at wind speeds that exceed those in any storm on Earth. The Great Red Spot has slowly changed over the years, and is currently about 1.3 times as wide as our planet.
The liquid metal at room temperature (a) Mercury (b) Sodium (c) Magnesium (d) Silver
Answer:
(a) Mercury
Explanation:
Mercury with chemical symbol (Hg) is also regarded as " quicksilver". It is heavy and silvery in nature and belongs to d-block of the periodic table, it is metallic element and it is liquid at standard conditions of (temperature and pressure). It has Boiling point of about 356.7 °C with Atomic number of 80. It can molten above the temperature of ( −38.8 °C)
In the future what two planets will earth resemble?
Answer:
Venus and Mars?
Explanation:
A pot of water at 25°C is placed over a flame until it has boiled away. Which way is energy being transferred between the system and the surroundings? *
Answer:
See explanation
Explanation:
According to the law of conservation of energy; energy is neither created nor destroyed but is converted from one form to another.
This means that energy can not be lost, we can trace the transfer of energy between a system and its surroundings.
When a pot of water at 25°C is placed over a flame until it has boiled away, energy is transferred from the pot (the system) to the surroundings hence the temperature of the surroundings rises accordingly.
How do i describe endothermic and exothermic changes in matter?
TRUE or FALSE: Traits that an organism has can be influenced by factors in the environment.
Answer:
True
Explanation:
Hope this helps
please help me with this question
Answer: I believe it would be B. Genus
Explanation:
I looked up the definitions for you and genus is defined as the group above species. Picture of definition attached.
Write the steps for calculating molar mass.
Answer:
Explanation:
1) Find number of each of the type of atom that is present in the compound, using the chemical formula .
2) Then multiply number of atoms of each element that is present in the compound with the atomic weight of each of the element
3) Add everything together and add the units (grams/mole ) after the number
Let finds that of water
Chemical formula of water is (H20 )
hydogens atoms= 2
oxygen atom= 1
Atomic weight for Hydrogen= 1
Atomic weight for Oxygen= 16
Total number of atoms of Hydrogen from the formula (H2O)= 2
Total number of atoms of Oxygen from the formula (H2O)= 1
the molar mass=
Hydrogen: ( 2 x 1)= 2
Oxygen: ( 1 x 16)= 16
Add together= (16+2)
= 18
Then add the unit, we have(18 g/mol.)
Which of the following answers below is the correctly balanced half-reaction for the reduction of the SO4 ^-2 ion in acid solution? The answer is C, but I don’t understand why. Thanks in advance :-)
Answer:
C
Explanation:
The oxidation number of Sulphur in SO4^2- is;
x + 4(-2) = -2
x - 8 = -2
x = -2 + 8
x = 6
Now,
the oxidation number of sulphur in H2SO3 is
2 (1) + x + 3(-2) = 0
2 + x -6 = 0
-4 + x = 0
x = 4
Hence, the oxidation number of sulphur changed from +6 to +4 which signifies gain of two electrons as shown in option C.
i need to write a brief paragraph on why this lab is important, please help!! here is the question!
How can the properties of acids and bases be used to classify solutions?
Answer:
Acids and bases aqueous solutions will conduct electricity because they contain dissolved ions. Therefore acids and bases are electrolytes. strong acids and bases will be electrolytes. weak acids and bases will be weak electrolytes.