Answer:
Center of gravity
Explanation:
Gravity always acts downward on every object on earth . Gravity multiplied by the objects mass produces a force called weight. Although the force of an objects weight acts downwards on every partial of the object , it is usually considered to act as a single force through its balance point , or center of gravity.
Liquids and solids are referred to as "condensed phases" because the attractive forces cause molecules to become stationary. leave little space between the molecules. create large spaces between the molecules. that hold the molecules together are negligible.
Answer:
leave little space between the molecules.
Explanation:
Matter is made up of small particles called molecules. These molecules present in matter are arranged inside its bulk.
In liquids and solids, the molecules are arranged very close together in such a way that there is only a little space between them. This is why liquids and solids are referred to as "condensed phases".
They are quite unlike gases where there is a lot of space between gas molecules.
Answer:
B
Explanation:
Is BaOH2 soluble or insoluble in water?
Answer:
Explanation:
Tough question.
The answer is very dependent on the temperature of the water. At 0o C, less than 5 grams is soluble in water.
The curve increases as the temperature increases. At 80oC about 35 grams is soluble in water 100 mL of water. So Ba(OH)2 is very soluble at higher temperatures.
Maybe the question can be resolved just a little better at room temperature. The solubility is still less than 5 grams / 100 mL. That makes it slightly soluble or more soluble than other things.
So to answer the question, you need to specify the temperature. I would say it is, but be prepared to defend your answer.
reserve one spot for dmndburgess thx
Answer:
thanks for the points have a nice day :D
Explanation:
Is heat a form of kinetic energy or potential energy?
Which of the samples contains the most atoms? Use evidence from the table to explain your answer.
Answer: Sodium/Na
Explanation: Molar mass is basically a measure of how heavy 6.02 x 10^23 atoms of a substance is, measured in grams.
So, if Sodium has the lowest molar mass then that means it’s molecules are very light. I’ll give a comparison: if you have 10 kilograms of bricks and 10 kilograms of feathers, will you have more feathers or bricks? Feathers, of course.
Mathematically it looks like this
50g/22.99g/mol = 2.17 mol
2.17 mol • 6.02 x 10^23 = 1.31 x 10^24 atoms
50g/58.93g/mol = 0.85 mol
You can see that as molar mass increases that the number of moles, and consequently, atoms, decreases.
Hope this helped
Anita did not make the track team this year, and she feels really disappointed and upset. What question would most likely redirect her thinking and provide a solution?
Answer:
Anita did not make the track team this year, and she feels really disappointed and upset. What question would most likely redirect her thinking and provide a solution?
Why did this terrible thing happen to me?
What other sports can I try this spring?
Why does everything I attempt go wrong?
Why did Karen get on the team but I didn't?
Answer - What other sports can I try this spring?
Explanation:
Failures and successes are part of our daily lives as humans. It can be very challenging for one to accept his or her failures and bring oneself above it.
when failure occur, the best way to reverse the negative impacts it brings is to move forward and decide on what next to do.
The actions that must be taken in the processes should be quite productive enough to bring back the results one desired.
When the effects of failures prove irreversible, one would then give the mind a diversion and help his or herself think their way though the failure that was encountered.
There are two main isotopes of chlorine. 75% of chlorine atoms have a mass number of 35, while 25% have a mass number of 37. Use this information to work out the relative atomic mass of chlorine.
Answer:
Relative atomic mass = 35.5
Explanation:
Given data:
Abundance of Cl -35 = 75%
Abundance of Cl -25 = 25%
Average atomic mass = ?
Solution:
Relative atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) / 100
Relative atomic mass = (75×35)+(25×37) /100
Relative atomic mass = 2625 + 925 / 100
Relative atomic mass = 3550 / 100
Relative atomic mass = 35.5
5.6 x 10^3 cm = ___m
Answer:
56 m
Explanation:
5.6 x 10^3 = 5600
5600 / 100 = 56m
Question 2
Which of the following is a balanced chemical equation?
A
2 Al(OH)3 - Al2O3 + 3 H2O
B
2 Al2O3 + 3 H2O - 2 Al(OH)3
С
2 Al(OH)3 - Al2O3 + 3 H2O
D
Al(OH)3 + 3 H20 - AlO3
Answer:
C
Explanation:
For A, 2Al(OH)3 contains 6H on the left side of the equation but only has 3H on the right side of the equation, thus its not balanced
For B, there is 2(Al2), which is 4, on the left side of the equation but only 2Al on the right side of the equation, so it is not balanced.
For D, theres a total of 6 H on the left side of the equation as there is (OH)3 and 3H, but none of the right side, so its not balanced.
C is the correct answer as
on the left side of the equation:
2 Al(OH)3 has 2Al, 6O, and 6H
on the right side of the equation:
Al2O3 has 2Al and 3O
3 H20 has 3H and 6O
this makes a total of 2Al, 6H and 6O, which is equal to the number of each element in the left side, thus it is balanced and is the right answer.
In the future for these type of qns, you want to add up the number of each element on the left, then the ride, and see compare the numver of element they have. if the number of all the elements on both sides are the same, the equation is balanced.
Stars making a circular motion across the sky is evidence of
Answer:
because they are actually moving, or because they reflect our motion through space.
Explanation:
Stars making a circular motion across the sky is evidence of the earth's rotation.
This is because when the earth rotates it appears to us like the stars are moving.
What is the result of the following calculation? Record to the correct number of significant figures. 7.94 g + 0.0132 g = ?
Select one:
a) 7.95 g
b) 7.9 g
c) 7.953 g
d) 7.9532 g
To solve such we need to know the concept behind significant figures. Addition, subtraction, multiplication and division follow the rules of significant figures. Therefore, the correct option is option A that is 7.95 g.
What is significant figures?
Significant figures of a number in positional notation are digits in the number that are reliable and necessary to indicate the quantity of something.
Rules for counting the significant figures are :
Zeroes before non zero digits are not significant
Zeros between non zero digits are significant.
Zeroes after non zero digits are not significant.
When we add two decimal numbers then, the final answer would be according to the number which have least significant number.
7.94 g + 0.0132 g = 7.95g
Since among 7.94 and 0.0132, 7.94 has the least significant numbers that is 3. So, answer should have 3 significant figures, answer will be 7.95.
Therefore, the correct option is option A that is 7.95 g.
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The Rio Grande river flows through the South Texas Plains ecoregion of Texas. The river is a major source of water for cities and farms in the area. Sometimes, so much of the Rio Grande's water is used that the river does not reach the Gulf of Mexico. How does the loss of river water affect ocean plants near the mouth of the river?
Answer:
What are the answer choices
Explanation:
Answer:
The answer choices are
Explanation:
A. The ocean plants cause more weathering.
B. More algae grows and competes for resources.
C. the slow water causes more erosion.
D. Less sediment is deposited in the soil.
But the answer is (D. Less sediment is deposited in the soil.)
How do you blow up a lithium watch battery?
Answer:
poke a hole in the battery ( it should me charged ) and then threw it in water
simple
Answer:
pock a hole and throw it in some water
Explanation:
Which condition most likely causes a V-shaped valley to form? A Fast-moving river B Deposition of rock C Erosion by wind D Slow-moving glacier
Answer:
C
Explanation:
urgent plzz help meeee thx
3,1,2 should be the correct answer
When a fast moving particle runs into a slower moving particle
what happens ?
Answer:
It depends upon the mass of the particles also. Assuming equal mass, then the slower moving particle gains some energy, and the faster-moving particle loses energy. However, if the slower moving particle had greater mass, it could transfer energy to the faster-moving particle.
Explanation:
Hope I could help! :)
What is rate of reaction? Discuss in brief slow and fast reactions.
Explain the particles in Solutions of sodium sulfate alone and lead nitrate alone explain what happens to these particles of the two solutions are added together steered then allowed to sit for a couple minutes
Answer:
white precipitates of PbSO4 will appear
Explanation:
Now let us first consider the reaction equation;
Na2SO4(aq) + Pb(NO3)2(aq) ---->2NaNO3(aq) + PbSO4(s)
So, if i mix solutions of sodium sulfate and lead II nitrate, stir it and allow it to stand for a couple of minutes, i will begin to see the appearance of white precipitates of PbSO4.
This follows from the solubility rules. Sulphates are soluble in water except those of group II ions, Pb^2+ and silver I ion.
30 POINTS!!! Please Help With this!!!!
when does mass change?
Answer:
the mass of an does not change with speed but changes when we add or cut a part of it.
Explanation:
Answer:
weight
Explanation:
explain why iron can displace copper from copper II nitrate solution, but copper cannot displace iron from iron III nitrate solution
Answer:
Iron metal is more reactive than copper.
Explanation:
Iron metal is more reactive than copper. ... Cu is less reactive than iron, therefore, cannot replace iron from iron sulphate (FeSO4). we have already seen that iron is more reactive than copper. So that means that in this reaction, copper is less reactive than iron. That means copper cannot displace iron. It cannot kick out iron from a sulfate.
H.C.F of 64 and 96 is
Answer: 32
Explanation: but you can find them on goggle
Are electrons shared with ionic or covalent bonds
why handpicking is necessary after winnowing?
please mark as brainliest
This answers may help you
On the microscopic level, which answer best explains the concept of energy
transfer as heat when a hand is placed in water that is 50 °C. Body temperature is
37 °C. Choose the correct answer. *
Answer:
See explanation
Explanation:
The question is incomplete but i will try to help you the much i can.
You see, we already know about the fact that energy is transferred from a hotter object to a cooler object. This is largely because of the collision of the molecules of a hotter body with the molecules of a cooler body ultimately leading to a transfer of energy from the hotter body to the cooler body. This now makes the temperature of the cooler body to rise.
Keep in mind that temperature is a measure of the average kinetic energy of the molecules in a body.
Hence, since the water is at a higher temperature, energy is transferred from the water to the hand and the temperature of the hand rises accordingly.
What does it mean for a solution to be supersaturated?
A. More solute has dissolved than should be possible.
B. More solute can still be dissolved in the solvent.
C. The dissolving speed was increased through heating.
D. The maximum amount of solute has been dissolved.
Explanation:
A supersaturated solution is a solution that contains more than the maximum amount of solute that is capable of being dissolved at a given temperature. The recrystallization of the excess dissolved solute in a supersaturated solution can be initiated by the addition of a tiny crystal of solute, called a seed crystal.
Supersaturated solutions have much more dissolved solute as saturated solutions, and then they can dissolve greater solute than that of the solution can at a specific temperature.
What is supersaturated solution?
Whenever the concentration of even a solute surpasses the concentration determined by the quantity equilibrium solubility, the chemical solution is said to be supersaturated.
.
A solution, which includes more than just the maximum quantity of solute that may be dissolved at a particular temperature is called a supersaturated solution. The injection of a microscopic crystal of solute, known as a seed crystal, can start the recrystallization of additional dissolving solute in a supersaturated solution.
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What are some chemical properties of nickel?
Answer:
It is a good conductor of heat and electricity
Its melting point is 1453°C and its boiling point is 2913°C
It's bivalent and it has a valency of two
Which of the following are evidence that a chemical reaction has occurred?
A. Two liquids are combined and a gas is released
B. A substance is added to water and dissolves
C. Two liquids are combined and a solid precipitate forms
D. A new substance is formed
E. A single reactant changes from a liquid to a solid
Answer:
A, B and C
Explanation:
The 7 rules of chemical change....
Gas Bubbles Appear. Gas bubbles appear after a chemical reaction has occurred and the mixture becomes saturated with gas. ...
Formation of a Precipitate. ...
Color Change. ...
Temperature Change. ...
Production of Light. ...
Volume Change. ...
Change in Smell or Taste.
Which has more mass?
a
1 mole of Carbon
b
1 mole of Oxygen
c
1 mole of Chlorine
d
1 mole of Hydrogen
Answer:
Chlorine has more mass than the other elements.
Explanation:
We can find the mass of each element using the following equation:
[tex] m = \eta*A [/tex]
Where:
η: is the moles
A: is the standard atomic weight
a) For carbon, we have:
[tex] m_{C} = \eta*A = 1 mol*12.011 g/mol = 12.011 g [/tex]
b) For oxygen, we have:
[tex] m_{O} = 1 mol*15.999 g/mol = 15.999 g [/tex]
c) For chlorine, we have:
[tex] m_{Cl} = 1 mol*35.45 g/mol = 35.45 g [/tex]
d) And for For hydrogen, we have:
[tex] m_{H} = 1 mol*1.008 g/mol = 1.008 g [/tex]
Therefore, chlorine has more mass than the other elements.
I hope it helps you!
The people in a coastal location are packing emergency supplies and evacuating their homes. Which of these statements best explains this behavior of people in the location?
They want to track the origin of a hurricane.
They plan to prevent the occurrence of a hurricane.
They want to escape from the fury of a hurricane.
They plan to watch a hurricane from a high location.
Answer:
They want to escape from the fury of a hurricane.
Explanation:
Your welcomeeeeeeeeeeeee
Answer:
They want to escape from the fury of the hurricane
Explanation:
None of the other choices made sense. They are packing to leave.
Have a splendid day!