Answer:
All particles have energy, and the energy varies depending on the temperature the sample of matter is in, which determines if the substance is a solid, liquid, or gas. Solid particles have the least amount of energy, and gas particles have the greatest amount of energy.
PLEASE ANSWER ALL I WILL GIVE BRAINLIEST PLEASE!!
Passenger airplanes take off in the troposphere but can eventually move into
the stratosphere. The planes may remain in the stratosphere until it is time to
land. Why do you think planes fly in the stratosphere?
Why are constellations and predictable locations in the night sky but planets are hard to find
Answer:
Because you can see the stars everynight pretty much, but the planets you need a telescope for. Plus, the planets are moving everynight making night and day so they all move! :)
Explanation:
Hope this helps! Brainliest plz?
What size volumetric flask would you use to create a 1.25 M solution using 29.75 g of MgCl2?
Answer:
250 ml
Explanation: I got it right on the lab.
The size of the volumetric flask that would you use to create a 1.25 M solution using 29.75 g of MgCl₂ is 250mL.
How do we calculate volume of the solution?
Volume (V) in liter of the solution will be calculated by using the molarity (M) formula as:
M = n/V, where
n is the moles of the solute and it will be calculated by using mass as:
n = W/M, where
W = given mass
M = molar mass
Moles of 29.75g of MgCl₂ = 29.75g / 95g/mol = 0.313 mol
Given that molarity of solution = 1.25M
On putting values on the equation of molarity we will get the value of volume as:
V = 0.313 / 1.25 = 0.2504 L = 250mL
For the preparation of 250 mL of MgCl₂ solution we required the volumetric flask of 250 mL.
Hence volumetric flask of 250mL is required.
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What’s the answer???
Answer:
Well I know that the first one is true.
Explanation:
Answer:
1. TRUE
2. FALSE
3. C
Explanation:
If excess sodium sulfate react with 36 g of iron (III) phosphate and produce a 65.0% yield of sodium phosphate, how many grams of sodium phosphate are actually produced?
[tex]Na_2SO_4 + FePO_4[/tex] -> [tex]Na_3PO_4 + Fe_2(SO_4)_3[/tex]
Answer:
According to the stoichiometry, the theoretical yield is 11.5 grams. Multiplying this by 0.650, you get 7.48 grams.
Explanation:
Which is the correct formula for the ionic compound that results from these two atoms? PLS HELP!!!
Answer:
If I am not wrong is C x2y5
Explanation:
The concept of valency is used here to determine the formula of the ionic compounds. The number of valence electrons in 'X' is 2 and that of 'Y' is 5. The formula is X₃Y₂. The correct option is D.
What is an ionic compound?The crystalline solids which are formed by neatly packed ions of opposite charges are defined as the ionic compounds. These compounds are formed by the combination of metals with non-metals.
The combining capacity of an element is given by valency. The elements belonging to the same group have the same valency. It is related to how many electrons are in the outer shell.
Here the number of valence electrons in 'X' = 2
The number of valence electrons in 'Y' = 5
The element 'X' need 6 electrons to attain the octet and 'Y' needs 3 electrons to attain the octet.
X - 6
Y - 3
The formula of the ionic compound is X₃Y₂.
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What is Hg2Cl2 empirical formula?
Answer:
Mercury chloride's(HgCI2) empirical formula is HgCI.
Explanation:
On the periodic table, what is a group? For the main groups, what characteristic
do the elements have in common?
In modern times, we know that the elements in a given group (also known as a family or column) have the same number of valence electrons, with ground state configurations having a consistent pattern, for instance:
F 1s2 2s2 2p5, Cl 1s2 2s2 2p6 3s2 3p5, Br 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p5, etc.
Of course, the ground state configurations play a major role in determining how an element reacts and what compounds it forms. Thus, the elements in a given group have similar properties.
The structure of the table also predicts how the properties vary. For instance, atomic radius increases down a group as does metallic character.
Hope this helps have a awesome day/night✨Explanation:
How can you tell if two objects are in thermal equilibrium?
The objects have the same temperature.
The objects are touching each other.
The objects' temperatures are changing.
The objects are the same size.
Answer:
Two objects are in thermal equilibrium if they are in close contact that allows either to gain energy from the other.
Answer: The Objects have the same temperature
Explanation: i just took the test
1. How are atoms held together? What is the attraction between?
Answer:
the atom is held together by the electrostatic attraction between the positively charged nucleus and the negatively charged electrons surrounding it, the stability within chemical bonds is also due to electrostatic attractions.
Explanation:
Answer:
Some type of bond (example: hydrogen bonds between water)
Polarity can also hold atoms together
hope this Helped!
2NaHCO3 + 3CaCl2 → CaCO3 + 2NaCl + H2O + CO2
Which statement is true about the equation above?
There are 3 chlorines on the reactant side and 3 chlorines on the product side of this equation.
There are 3 chlorines on the reactant side and 3 chlorines on the product side of this equation.
There are 3 calciums on the reactant side and 2 calciums on the product side of this equation.
There are 3 calciums on the reactant side and 2 calciums on the product side of this equation.
There are the same number of oxygen atoms in the reactants and the products. There are the same number of oxygen atoms in the reactants and the products.
This equation does not follow the law of conservation of mass.
Answer:
There are the same number of oxygen atoms in the reactants and the products
Explanation:
However the equation is not balanced
3 Ca on one side and 1 on the other
7. Cecilia puts two magnetic toy trains very close to each other on a track. What will happen next, and
why.
i'll give brainliest
You live near the ocean and your friend lives further inland. Based on this, what can you say is most likely different about the climate in your area from your friend's area in the winter?
Your friend has colder winters than you do.
Your friend has warmer winters than you do.
You have less precipitation than your friend does.
You get more sunshine in the winter.
Answer:
I'm thinking its "Your friend had colder winters than you do."
Explanation:
It is not "Your friend has warmer winters than you do." Or "You Have less precipitation than your friend does." I was doing this quiz before that had this question and its not those.
In the ocean side the the winter will be colder by the ocean breeze in the day time. The location of your friend farther from the ocean will have warmer winters than you.
What is sea breeze ?Any wind that flows from a big body of water onto or onto a landmass is called a sea breeze or an onshore breeze. Sea breezes form as a result of changes in air pressure brought on by the different heat capacities of water and dry land. Sea breezes are therefore more confined than prevailing winds.
A sea breeze is frequently seen along coasts after sunrise because land warms up far more quickly than water does when exposed to solar radiation. While dry ground also cools faster than water, a land breeze or offshore breeze has the opposite effect.
In winter seasons, along with the sea breeze make the climate more colder than that in locations farther from oceans. Hence, option b is correct.
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Hey.... If I got a question in my exams of which metal does not react with hydrochloric acid and I write gold as the answer, will I get full marks on that questiona dn the whole exam paper in total????
Answer:
I think you would pretty much get the answer wrong.
You won´t get full credit. sorry for your wrong test answer, :(
Explanation:
The correct answer would be copper and mercury do NOT react with hydrochloric acid.
how do we know that all the continents were all together at one point in time. writing prompt and it has to be at least 7 sentences
Answer:
We can tell by how the continents look. Scientists who propose the pangea theory have said this. You can see for yourself because all the continents look like puzzle pieces you could put together. Scientists can also tell from the species. For example, let's say a scientist found a bone of a creature at the edge of a continent, the edge of another would have the same species. They have also calculated that the continents in itself are still splitting apart, but very slowly. The reason they split up was because tectonic plate movements.
HELP ME WILL MARK BRAINIEST
(science)
hurry help!!
A person who is physically addicted to and emotionally dependent on alcohol has the disease called___________.
a. alcoholitis
b. osteoporosis
c. alcoholism
d. Parkinson's
Answer:
C
Explanation:
Alcoholism is the inability to control drinking due to both a physical and emotional dependence on alcohol.
PLEASE HELP ILL DO WHATEVER Bryan is doing a triathlon and you need to calculate his average speed for all three events. He swims 1km in 0.4 hrs. He rides his bike 50km in 1.5hrs and he runs 10km in 0.7 hrs.
Answer:
toda
Explanation:
:todo lo que tienes que hacer es hacer la cosa
Answer:
16.6km/h
Explanation:
Speed is distance/time.
speed for 1st event = 1/0.4 = 2.5km/h
speed for 2nd event = 50/1.5 = 33.3 km/h
speed for 3rd event = 10/0.7 = 14.28 km/h
Average speed = 2.5 + 33.3 + 14.28 /3 = 50/3 = 16.6 km/h
What are high tides caused by
Answer: the moons gravitational force
Explanation:
Due in 5 mins!!!! Pls hurry
Which of the following would be the best example of potential energy?
A racecar moving at 120 miles per hour around a track.
a bullet shot out of a gun
a rollercoaster at the bottom of the first hill
a rubber band stretched to its fullest length right before someone lets it go
Answer:
D because it is in a fixed position
(SCIENCE) HURRY HELP!!
Anabolic steroids are especially dangerous for teenagers whose bones are still growing.
true or false
Answer:
True
Explanation:
Generally makes sense.
How many molecules are there in 3.20 grams of NH4SO2
Answer:
0.0389757845886336
Explanation:
An alloy of sodium and potassium is used as a coolant due to its
A.high thermal conductivity
B.physical state
C.high reactivity
D.all except c
Answer:
A
Explanation:
Because It's dense meaning that it doesn't burn
Explanation:
https://youtu.be/f_kgUUaMZlw
What happens to the number of valence electrons as you move from element 1 to element 18 on the periodic table?
A)the number of valence electrons decreases
B)the number of valence electrons decreases then increases in a predictable sequence
C)the number of valence electrons increases
D)the number of valence electrons increases then decreases in a predictable sequence
Answer:
C
Explanation:
Answer: The answer is C
Explanation:
How would you describe boiling point?
Answer:
Boiling point, temperature at which the pressure exerted by the surroundings upon a liquid is equaled by the pressure exerted by the vapour of the liquid; under this condition, addition of heat results in the transformation of the liquid into its vapour without raising the temperature. Water at its boiling point.
Explanation:
g00gle worls
What do you think is the primary reason why the Unionid mussel population declined whenever there is a dramatic increase in the Zebra mussel population?
Answer:
When the Zebra arrived they ate all the food so the Unionid mussels declined as they died from the lack of food. Causing the Zebra Zebra numbers to increase and Unionid numbers to decline.
How would you calculate an object’s mechanical energy?
What’s the answer????
Answer:
1. C
2. A
3. A
Explanation:
What is the main purpose of the excretory system?
Question 6 options:
To cause movement of the body
To respond to stimuli
To transport nutrients
To remove waste products
Answer:
To remove waste products
Explanation:
I think
Answer:
to remove waste products