Which sample would show stronger (intermolecular) attractive forces, the cold water or the hot water?
Answer:
Cold water
Explanation:
A simple way to solve this kind of problems is to keep in mind that:
Solids have stronger intermolecular attractive forces than liquids, and liquids have stronger forces than gases.
Cold water behaves more similarly to solids than hot water. Conversely, hot water behaves more similarly to gases than cold water. Thus, cold water has stronger intermolecular attractive forces than hot water.
True or False: There are five (5) of Newton's Laws of Motion *
Answer:
False
there is three
Explanation:
Three laws are combined together which is further known to us as Newton ’s three laws of motion. These three newton’s laws of motion are: Law I – Newton’s first law of motion Law II – Newton’s second law of motion
Hope this helps :)
Abel was running a fever of 107 degrees Fahrenheit, what was her temperature in degrees
Celsius?
Explanation:
we know the formula to convert farenheit to Celsius
=(F-32)(5/9)
=(107-32)(5/9)
(5/9)=375/9= 41.6 degrees Celsius
What are two ways that convection currents in the oceans distribute the Sun's energy? A. Icebergs are carried from the poles to the equator. B. Warm water is carried from the equator to the poles. C. Living things swim in cool and warm parts of the ocean. D. Nutrient-rich water is brought to the ocean surface
Answer:c
Explanation:
No cap
Imagine a group of hunters kills half of the rabbit population. How will it affect the other organisms?
Answer:
They will die off too
Explanation:
The animals that feed off the rabbits will start to die off from starvation, and so will the animals tho eat off of those. The entire food chain above the rabbits will start to decrease, while the plants and animals that the rabbits eat will increase in population due to less predators.
How many moles is 415 g Fe?
Answer:
7.4312 moles
Explanation:
No of mole = mass in gram / molar mass
No of moles = 415/55.845
7.4312 moles
HELP MEEEEEE PLEASEEEEE WILL OFFER BRAINLIEST
Answer:
1.This answer would be option A.
2. I think that would be 1350
Explanation:
Give a situation in life when you've experienced resonance.
A CANDLE WILL STAY LIT INSIDE THE SPACE SHUTTLE WHEN IT IS ON THE LAUNCH PAD, BUT NOT WHEN IT IS IN ORBIT. WHY?
Answer:
because there is no oxygen in space for it to burn
because all fire need oxygen to burn
Explanation:
A sample of carbon monoxide gas occupies 224 L at STP. This sample contains how many grams of oxygen atoms?
Answer:
16 g.
Explanation:
The formula for carbon monoxide is CO.
So there is one atom of oxygen in the formula, therefore there is one mole of oxygen gas ( one mole occupies 22,4 L at STP)
One mole of oxygen atoms = atomic mass of oxygen in grams = 16 grams.
H2O2 → H2O + O2
This is showing the reaction that we used in elephant’s toothpaste. Write and balance this equation on your own sheet of paper. If 24.53 g of hydrogen peroxide decompose, how many grams of water are produced.
Answer:
75.47
Explanation:
AS WE CANT WEIGHT AIR THE ANSWER IS CORRECT
pleaseeeeeeeeeeeeeeeeeeeeeeee helppppppppppp
Approximately how many grams of KBr will dissolve in 100g of water at 50C?
60g
70g
80g
90g
Answer:
the answer would be to your problem here is 90g
Explanation:
Identify this reaction
In pic
Answer:
Single displacement
Explanation:
I think this is right...
I hope it is!
What information can a mineralogist learn from testing the mass and volume of a mineral?
An object with a
mass acclerates slower.
What's the fifth planet from the sun?
Answer:
jupiter
Explanation:
mercury, venus, earth, mars, jupiter, saturn, uranus, neptune,
For each problem listed in Column A, select from Column B the letter of the conversion factor that is needed to solve the problem. You may need to use more than one conversion factor to solve the problem.
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b) Why is aluminium extracted using electrolysis and not carbon?
Answer:
Aluminum is more reactive than carbon so it must be extracted from its compounds using electrolysis.
Explanation:
Even though aluminum is more abundant than iron in the Earth's crust, aluminum is more expensive than iron. This is mainly because of the large amounts of electrical energy used in the extraction process.
What kind of scientist would study the the force of a car running into a wall
A. A Chemist
B. A physicist
C. A Botanist
D. A Biologist
Answer:
B. A Physicist
Explanation:
A container of gas is initially at 0.500 atm and 298 K. What will the pressure be at 398 K?
Answer:
5
Explanation:
What is the speed of a jet that flies 3200 miles in 20 hours?
160 mph
3180 mph
3220 mph
64000 mph
Answer:160
Explanation:3200/20=160
Answer:
about 160 mph
Explanation:
How is the glucose level in the blood maintained? Which body system, organs, and hormones are used and what do they do?
Answer:
Explanation:
Insulin is an hormone used to regulate blood glucose, as it helps to maintain a balance. It allows for transport of glucose to organs such as liver.
The process of glucose regulation is a complex process. When food is eating glucose is absorbed into the bloodstream this happen from the gut and it raises the blood glucose level this causes insulin(hormone) to be released from the pancreas so glucose can move inside the cells and be used.
As glucose moves inside the cells, the glucose level inside the bloodstream returns to normal and insulin release slows down.
Glucose which is the main energy source used by cells is allowed to be taken up by muscles, liver and fat (adipose tissue) and use as a source of energy so they can function properly.
PLSSS HELP ME
1) Which of these bonds is most easily broken?
1. All are equally easy to break
2. Hydrogen Bond
3. Ionic Bond
4. Covalent Bond
2)Hydrogen bonds are formed due to ______.
1. Electromagnetic attraction
2. Sharing of electrons
3. Stealing of electrons
4. 'Stickiness' due to protons and neutrons
3) What is a polar molecule?
1. A molecule found either at the north or south pole
2. A molecule with a positively charged end and a negatively charged end
3. A molecule with a distinct beginning and end
4. Any molecule that includes oxygen
4)Water tension is an example of ______.
1.Oxygen bonding
2.Hydrogen bonding
3.Isometric bonding
4. Covalent bonding
Answer:
1. 2)Hydrogen Bond
2. 1)Electromagnetic attraction
3. 2) A molecule with a positively charged end and a negatively charged end
4. 2.Hydrogen bonding
* i think i am right and i really hope so but please dont
count it against me babe.
explanation:
Individual hydrogen bonds are weak and easily broken; however, they occur in very large numbers in water and in organic polymers, creating a major force in combination. Hydrogen bonds are also responsible for zipping together the DNA double helix.
A hydrogen bond is formed when the positive end of one molecule is attracted to the negative end of another. The concept is similar to magnetic attraction where opposite poles attract. Hydrogen has one proton and one electron. This makes hydrogen an electrically positive atom because it has a deficiency of electrons.
A polar molecule is a chemical species in which the distribution of electrons between the covalently bonded atoms is not even. Some chemical species, such as chains of carbon molecules, share electrons equally and are said to be nonpolar molecules
Water molecules forming hydrogen bonds with one another. The partial negative charge on the O of one molecule can form a hydrogen bond with the partial positive charge on the hydrogens of other molecules. Water molecules are also attracted to other polar molecules and to ions.
Match the following pls
Answer:
1 d
2 c
3 b
4 e
5 a
Part 1)
One reaction that produces hydrogen gas can be represented by the unbalanced chemical equation- Mg(s) + HCl(aq) −→ MgCl2(aq) + H2(g).
What mass of HCl is consumed by the reaction of 3.15 mol of magnesium?
Answer in units of g.
Part 2) What mass of MgCl2 is produced? Answer in units of g.
Part 3) What mass of H2 is produced? Answer in units of g.
Answer:
Part 1: 229.95g
Part 2: 598.5g
Part 3: 12.6g
Explanation:
Note: I learned this last week. Answer not sure.
Pls tell me if i got it right or wrong.
Mg + HCl - > MgCl2 + H2
First, balance the equation.
There is only 1 H and 1 Cl at the left side. BUT there are 2 Cl and 2 H at the right side. So you can add a 2 in front of HCl to balance it.
Mg + 2HCl - > MgCl2 + H2
Formula 1: (n= m/mr)
n = moles, m= mass, mr = molecular mass
Formula 2: (n= v/24)
v = volume
Part 1
What mass of HCl is consumed by the reaction of 3.15 mol of magnesium?
Ratio of
(look at the number in front of each)
2HCl : Mg
2 : 1
(3.15 x 2) : 3.15 moles
6.3 moles : 3.15 moles
So 2HCl has 6. 3 moles
Now use formula 1 (n = m/mr)
Calculate molecular mass of HCl
Check your periodic table
mr of HCl =(1 + 35.5) = 36.5
6.3 = m/36.5
m = 229. 95grams
Part 2
What mass of MgCl2 is produced? Answer in units of g.
Ratio of
2HCl : MgCl2
(1 +35.5) : (24+35.5x2)
36.5: 95
229.95g :?
229.95g : 598.5g
m = 598.5g
Part 3
What mass of H2 is produced? Answer in units of g.
2HCl : H2
36.5 : 2
229.95g :?
229.95g : 12.6g
m = 12.6g
what is the electrical charge of an atom
D. It ensures continued existence of the orga
2. Which of the following does NOT belong to the group based on its mode
of reproduction?
A. Butterfly
B. Frog
C. Dog
D. Mosquito
List the primary consumers in the food web please help
Answer:
Giraffe, rhinoceros, grasshopper, mouse, and deer
Explanation:
Primary consumers eat producers (plants). Therefore, all the animals that eat the plants are primary consumers.
Answer:
cricket, mouse, snake, bird
Explanation:
2.What are the 3 effects of acid rain..?
Answer:
1) Damages soil and trees.
2) Makes holes in statues and buildings.
3) Pollutes rivers and lakes.
Answer:
It can harm animals underwater and on land
It has an effects on trees, freshwaters, and soils destroy insects and aquatic life-forms, and weathering stone buildings and sculptures, as well as impacts on human health.
Explanation:
I got it from a video. Hopefully, this helps.
When solid copper reacts with aqueous silver nitrate, the products are copper (II) nitrate and silver metal. How
many grams of silver would be produced from 83.94 grams of silver nitrate?
Answer:
This chemical equation means: One mole of solid copper plus two moles of aqueous silver nitrate produce one mole of copper(II) nitrate plus two moles of solid silver. This is a single replacement reaction in which the metal copper replaces the metal silver.
Explanation:
Hope this help