Answers
Answer:
Option 2
Explanation:
Related Questions
A blue solid X is soluble in water which method is used to obtain pure solid x from an aqueous solution
Answers
Answer:
The answer is crystallisation
3. What mass of water vapor condenses if 435 kJ of heat are released in the process? a a 10.79 b 982 g C 1.30 x 10 g d 1939
Answers
Mass of water vapor = 193 g
Further explanationGiven
435 kJ of heat are released
Required
mass of water vapor
Solution
The heat to change the phase can be formulated :
Q = mLf (melting/freezing)
Q = mLv (vaporization/condensation)
Lv for water = 2256 kJ/kg or 2256 J/g or 40.7 kJ/mol
So the mass of water vapor :
[tex]\tt m=\dfrac{Q}{Lv}\\\\m=\dfrac{435000~J}{2256~J/g}\\\\m=192.8\approx 193~g[/tex]
How many atoms are in a 0.50 g sample of helium
Answers
What is the mass shown?
(Sorry u cant really see!)
Answers
In 0.4 mole of H2S, how many atoms of H are there?
Answers
Answer:
8
Explain
H: Ignoring the coefficient, we know there's 5+3=8 atoms
If a 50kg car is pulling a 30kg car, how much force would be required to accelerate the cars at 2m/s/s?
Answers
Answer:
160N
Explanation:
The force required to accelerate the two cars can be calculated thus:
F = m × a
Where;
F = force (Newton)
m = mass (kg)
a = acceleration (m/s²)
However, according to the question, a 50kg car is pulling a 30kg car, which means that the mass of the two cars is 50kg + 30kg = 80kg.
a = 2m/s²
F = ma
F = 80 × 2
F = 160N
What group is not assigned electron affinities on the periodic table?
Answers
Answer:
Explanation:
halogen group
Electron affinities are negative numbers because energy is released. The elements of the halogen group (Group 17) gain electrons most readily, as can be seen from their large negative electron affinitie
Answer:
tbh i liked how u ghosted me
Explanation:
What is the relative placement of the Moon, Earth, and Sun during a lunar eclipse?
1.The Sun, Earth, and Moon are aligned with the Earth in the middle and the Moon furthest away from the Sun.
2.The Earth and Sun are aligned with the Moon at a right angle to Earth.
3The Moon and Sun are aligned with the Earth at right a right angle to the Moon.
4The Sun, Earth, and Moon are aligned with the Moon in the center and the Earth furthest away from the Sun.
Answers
The moon being in the middle blocks much of the suns rays, causing near darkness for a few moments
Answer:
have a good day
Explanation:
1.The Sun, Earth, and Moon are aligned with the Earth in the middle and the Moon furthest away from the Sun.
Which allotrope of phosphorus has less ignition temperature?
Answers
Answer:
kid poop i only did this for no reason
Explanation:
A magnesium atom that loses 2 electrons becomes a
A) Positive ion with a smaller radius
B) Positive ion with a larger radius
C) Negative ion with a larger radius
D) Negative ion with a smaller radius
Answers
Answer:
A
Explanation:
because the atomic radius reduced by loosing one energy level leading to a positive ion in the resulting ion
The study of chemicals and their bond is called chemistry.
The correct answer is A.
The metals have the property to lose electrons to become stable compounds.
In magnesium, the total number of electrons is 12. In a valance shell, they have 2 electrons.
when they lose or donate the two electrons to the other. The outer shell will be empty and the force of the nucleus remains in the inner shell.
The loss of electrons leads to a decrease in the size of an atom and form positive ions.
Hence, the correct answer is A that is a Positive ion with a smaller radius.
For more information, refer to the link:-
https://brainly.com/question/12985618
which of the following compressed air?
a)car tyres be)Aerosol cans c)Air guns d)all of these
Answers
Answer:
option A.car tyres be
Explanation:
is the lorax story relevant today society?
Answers
Answer:
well i would say yes because how the factory made the air bad and how they all were fighting just about a tree
Explanation:
Answer: LOL XD no because of CO/VID
Explanation: BRAINLIEST PLS LOL
serup is which solution
Answers
Answer:
dilute solution . . . . . . .
Explanation:
. .
Answer:
dilute soloution
Explanation:
dilute soloution as it dissolves
Name and draw the lewis dot diagram for CuO
Answers
Lewis Dot Diagram: Attached image below
Answer:
lewis dot diagram for cuo is a bulletin dot above cu
Explanation:
Molecular Formula : CuO
name : Copper Oxide or cupric oxide
Hello, can someone please help me with this science question I have? because my class starts in 5 mins and I didn't finish it and no one else is answering my last question. Thanks! BTW the subject is science.
Answers
Answer:
Yes they can
Explanation:
But they need pretestino fromadverse temperatures and they need nutrients and also oxygen around the roots
will give brainlist plz help
A description of a material that scatters light that passes through it
Answers
Answer:
I believe you said that I would get brainlest if I answer!
Explanation:
A translucent material scatters the light that passes through it. You can usually see something behind a translucent object, but the details are blurred. Wax paper and frosted glass are translucent materials. A material that reflects or absorbs all of the light that strikes it is called opaque.
A ______ square is a diagram used to predict all possible allele combinations from a genetic ______. Using this diagram, the phenotypes of offspring can be determined from the genotypes.
Answers
Answer:
A Punnet Square...the second I am not sure.
Explanation:
Unfortunately the second could be many things. You'd have to have more background information.
Answer:
PUNNETT....,MAKE SURE U HAVE 2 T,s
Explanation:
punnett and cross
How many moles of oxide are in 0.050 g of Iron(III) oxide?
Answers
Answer:
0.00031311017345051
Which of the following is not a sign that chemical reaction has taken place?
a. temperature change
b. formation of a liquid
c. color change
d. formation of a gas
Answers
Answer:
a
Explanation:
uh process of elimination
Temperature change, phase change to liquid or gas are all physical changes not chemical reactions. A color change indicates a chemical reaction has taken place.
What is a chemical change?Chemical changes are taking place by the breaking or making of chemical bonds. It results in the formation of a new product which is having different properties than the initial substances.
Physical changes does not involve any change in chemical bond. Phase changes, change in size, shape, conductivity, solubility etc. are physical changes. A change in temperature phase conversion into gas or liquid are all physical changes.
A change in color indicates that a new product is formed there. For example reddish brown rust is iron oxide formed by the reaction of Fe with oxygen. Therefore, option c is correct.
Find more on chemical changes:
https://brainly.com/question/2591189
#SPJ6
what does Hess’s law state?
Answers
Answer:
C. The enthalpy of a reaction is the sum of the enthalpies of intermediate reactions.
Explanation:
The heat of any reaction ΔH∘f for a specific reaction is equal to the sum of the heats of reaction for any set of reactions which in sum are equivalent to the overall reaction.
GIVING BRAINLIEST!
Please define the following in your own words:
law of conservation of matter
Answers
Answer:
Matter says that the amount of matter stays the same, even when matter changes form. Sometimes it may seem that matter disappears during a science experiment, but this law tells us that matter cannot magically appear or disappear, it simply changes from one form to another.
Explanation:
brainliest?
Answer: Hope this helps:)
The Law of Conservation of Mass dates from Antoine Lavoisier's 1789 discovery that mass is neither created nor destroyed in chemical reactions. In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction. The law of conservation of matter states that in any given system that is closed to the transfer of matter, the amount of matter in the system stays constant. The law of conservation of matter says that in chemical reactions, the total mass of the products must equal the total mass of the reactants. French chemist A. Lavoisier laid the foundation to the scientific investigation of matter by describing that substances react by following certain laws. These laws are called the laws of chemical combination. Matter says that the amount of matter stays the same, even when matter changes form. Sometimes it may seem that matter disappears during a science experiment, but this law tells us that matter cannot magically appear or disappear, it simply changes from one form to another. Matter can change form through physical and chemical changes, but through any of these changes, the matter is conserved. The same amount of matter exists before and after the change—none is created or destroyed. This concept is called the Law of Conservation of Mass.
The measure of the speed of the moving or
vibrating particles is called the
Answers
Answer:
Temperature
Explanation:
It's called temperature.
This is because, in any substance an increase in temperature means that the particles on the average will move with greater speeds, or that they have greater kinetic energy while a decrease in temperature means that the particles on the average will move with lesser speeds, or that they have lesser kinetic energy.
What is the relationship between Force and Velocity?
Affect/Effect
Cause/Blame
Claim/Reasoning
Cause/Effect
Answers
Answer:
Cause/ effect relationship.
Explanation:
because the force is the cause of energy that is present and velocity is the effect (speed) that is present.
balance the equation KCIO3 → KCl + O2
Answers
Answer:
3kcl+ 02
Explanation:
in this way we can balance the chemical equation
Which is the molar mass of BF3?
Answers
67.81 g/mol
How many moles of Gold (Au) are in 3.60x10-5 g?
Choose the correct set up from the given choices.
a. .000360g divided by (196.96g/1 mol)
b. .0000360 g multiply by (1mol/196.96 g)
c. .00360 g divided by (1mol/196.96 g)
d. .0000360 g divided by (1mol/196.96 g)
Answers
Explanation:
[tex](.0000360 gAu} )\frac{1molAu}{196.96gAu}= ? mol Au[/tex]
Cooks sometimes marinate meat in liquid before cooking, which helps soften the meat and adds flavor. A cook places a whole
steak and 16 oz. of marinating liquid in a bowl, and then marinates the mixture overnight in the refrigerator. Many changes would
* speed up this rate of marination. Which of these would slow it down?
Answers
Answer:D
Explanation:
Answer:
C) adding 16 oz. of water to the marinating liquid
Explanation:
Adding 16 oz. water to the marinating liquid would decrease the concentration of the marinating liquid and slow down the rate of reaction. The other answer choices would increase the rate of reaction.
PLEASE ANSWER CORRECTLY !!!!!!!!!!!!!! WILL MARK BRAINLIEST !!!!!!!!!!!!!!
Answers
Answer:
the ice has reached its melting point
the water has reached its freezing point
the whatever that is has reached its cooling point I guess
Answer:A chemical reaction?
Explanation:let me be
Question are you smart well if you are then ANSWER THIS
whats in the middle of April and march?
What do you have to do to make a nut eating animal to like you?
AND why are you reading this?
Answers
Answer:
to get more points and to i have no clue what that answer is
Answer:
R is in the middle of March and April, feed it nuts right?? I'm reading this because I needed points to do my math homework.
Explanation:
Ahhh helpppp:))))))))))
Answers
Answer:
HKOB
Explanation:
hope it helps