Answer:
Whats the hypothesis and the experiment?
Explanation:
I cant really help without context
1. Atoms are
a. The smallest building blocks of matter
b. Subatomic particles
c. Charged particles
d. Made up of leptons.
Answer:
a.the smallest building blocks of matter
Explanation:
because atoms are the smallest building blocks of matter.
Ai là nhà Hoá học nổi tiếng nhất ở Việt Nam? Ông đã có những đóng góp gì cho xã hội?
Answer:
Are you spraking Vietnamese?
Which describes a molecule? (Select all that apply.)
It can be two or more of the same elements combined together.
It can be one element by itself.
It can be two or more different elements combined.
It can be the combination of different neutrons.
Answer:
a) It can be two or more of the same elements combined together.
A molecule is two or more atoms of the same element chemically combined.
Example is an oxygen molecule.
Molecules can be described as two or more of the same or different elements combined together. Therefore, options (A) and (C) are correct.
What is a molecule?A molecule can be described as a combination of two or more atoms that form the smallest unit into which the structure and chemical properties of that substance can be classified and preserved by a pure substance.
A molecule may be homonuclear if it consists of atoms of a single chemical element such as oxygen molecule (O₂) or it may be heteronuclear such as water (H₂O).
A molecule consists of an arrangement of atoms held together by the forces of valence. Two atoms that are chemically combined comprise diatomic molecules.
Heteronuclear diatomic molecules consist of two combined atoms of the same substance such as Carbon monoxide (CO), hydrochloric acid (HCl), etc.
Therefore, a molecule can consist of atoms of the same or different elements.
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Convert 8.5 x 10-3 mm to micrometers
Explanation:
1mm = 10^-3 micrometre
8.5 x 10^-3 mm = 8.5 x 10^-6 micrometre
Help!! is for tomorrow
The graph represents the heating of water in a pot. At 150 seconds, the water has just reached a boil. If the heat is left on, what will happen to the temperature and volume of water in the pot? (All temperatures in °C.)
2. You are given a mixture of sand, salt, metal filings and small stones. What would you do to separate all four items?
I’ll give brainliest, thanks, 5 stars to the best answer that has been explained properly
Answer: Well, I'd personally go with the tedious route and pick them all out by hand, but I know what doesn't really help. Just a suggestion though, sorry.
Explanation: Don't listen to my advice if you want any free time.
Answer:
Start by using a magnet to separate out the metal fillings.
Then put the mixture through a sieve to separate out the stones.
Then mix it into water and drain out the sand.
Finally, boil the water off to get the salt back.
Explanation:
The metal fillings should be magnetic, and so a magnet will attract only the metal and allow you to remove it.
Putting the mixture through a sieve will basically sift it, since the sand and salt will fall through the holes but the rocks will be too big.
Mixing the mixture into water will dissolve the salt but not the sand, allowing you to pour off the water and be left with sand.
Boiling the water will cause the H2O to become a vapor, while leaving the salt behind.
Help with #3 please. I’ll mark brainly
Answer:
sa gutan ko na nga para mabrainliest na sya
A quantity of gas has a volume of 2250 at a temperature of 45 C and a pressure of 650 torrWhat is the temperature (in °C) if the volume remains unchanged but the pressure is decreased to 565 torr?
Answer:
your answer is 769
Explanation:
i took the test lol
The pressure of a given amount of gas held at constant volume is directly proportional to the Kelvin temperature, according to Gay Lussac's Law. When you heat a gas, the molecules gain energy and move faster. This means more impacts on the container's walls and an increase in pressure.
The temperature at 565 torr = 276.5 K
What are gas laws?Gas laws are laws that relate a gas's pressure, volume, and temperature. Boyle's law, named after Robert Boyle, states that the pressure P of a gas varies inversely with its volume V at constant temperature, or PV = k, where k is a constant.Boyle's Law states that when the temperature and mass are both constant, the volume of a given amount of gas held at constant temperature varies inversely with the applied pressure.Charles' law states that if the pressure remains constant, the volume occupied by a fixed amount of gas is directly proportional to its absolute temperature.The pressure of a given amount of gas held at constant volume is directly proportional to the Kelvin temperature, according to Gay Lussac's Law. When you heat a gas, the molecules gain energy and move faster. This means more impacts on the container's walls and an increase in pressure.Avogadro's law states that equal volumes of different gases contain an equal number of molecules under the same temperature and pressure conditions.
The temperature = [tex]\frac{565 X 318.15}{650}[/tex] =276.5 K
To learn more about : Gas laws
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A report on the modern periodic table
Answer:
there is nothing there
Explanation:
i don't see. anything
Carbon is classified as which type of element?
Carbon is classified as a nonmetal.
Spell all words correctly.
Which non-destructive technique is used for analyzing carpet fibers at a crime scene?
______________ is a non-destructive technique used for analyzing carpet fibers at a crime scene and preserving evidence in the original form.
( forensic science question)
Room temperature fluorescence spectroscopy is a non-destructive technique used for analyzing carpet fibers at a crime scene and preserving evidence in the original form.
In investigations, it is often necessary to preserve the physical integrity of evidence so that it can be presented in court. It therefore becomes important to use methods of analysis that are non - destructive when analyzing the material.
One of the most useful non - destructive methods of analysis is room temperature fluorescence spectroscopy. This method of analysis is accurate, yet preserves the physical integrity of evidence.
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Answer:
Spectrometry.
Explanation:
The long ridiculous answer the person gave before me doesnt even fit.
A box with a mass of 3.5 kg is pushed along a table. If the net force on the box is 35 Newtons, what is the acceleration of the box?
PLLSS HELP ME
Answer:
10 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
m is the mass
f is the force
From the question
mass = 3.5 kg
force = 35 N
We have
[tex]a = \frac{35}{3.5} \\ = 10[/tex]
We have the final answer as
10 m/s²Hope this helps you
Under normal conditions, NaOH completely ionizes as: NaOH ->
NaO + H+. TRUE FALSE
NEED ANSWER ASAP
the answer is false because naoh does ionizes
Answer: False
Explanation:
Can someone tell me what this is ?
Answer:
ruler
Explanation:
that's what we call a ruler
Answer:
2 centemeters and 8 milimeters
Explanation:
The allotropic form of a non – metal is a good conductor of electricity. Name the nonmetal.
Answer:
carbon with graphite as the allotrope
Among the following compounds which are isomers?
I. CH3CH2-O-CH3 II CH3CH2CH2OH
III CH3CH2–0-CH2CH3 IV. CH2=CH-O-CH3
CH
3
CH
2
OCH
3
and CH
3
CH
2
CH
2
OH have different functional groups, hence, they are functional isomers.
Need the following answers for
Calcium bromide + potassium hydroxide
A) Balanced chem equation
B) TIE
C) NIE
Convert the following number from scientific notation to numerical notation:
9.9 x [tex]10^{7}[/tex]
why is water able to easily dissolve ionic compounds
Answer:
Water is a covalently bonded molecule. H2O-> Oxygen and hydrogen are both nonmetals. Ionic compounds are made up of a nometal and metal which causes it to have electrical components. A covalent bond is stronger than an ionic bond, which allows water to break down ionic salts.
How does time needed for preparation Affect meal planning? Also I need this answer asap!
Answer:
Spending time preparing indicates a better diet,(eating veggies and fruits). The opposite if you spend no time or less than an hour preparing(you are more likely to spend money on fast food)
Which location below would be considered a microhabitat
Answer: An overturned decomposing log or the underside of a rock in a stream are excellent examples of microhabitats. Both a habitat and a microhabitat have typical abiotic (e.g. water, temperature, light.
Explanation:
If you change the 2 in front of 2O2 to a 3, what will be the change in the results on the right side of the equation? (1 point)
Answer:
There is an extra O2 molecule left over
Explanation:
Joe has a disease that his cells can't convert food energy effectively into energy they can use. He gets extremely tired as a result. Which organelle is affected by Joe's disease?
Answer:
Mitochondrion
Explanation:
Joe's cells can't convert food energy effectively into energy they can
use. As a result, he gets extremely tired, has weak legs, and can't
breathe well. Joe swims every day to keep his body as strong as
possible. Which organelle is affected by Joes disease
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A student makes a graph of ionization energy using the periodic table.
Which claim is most supported by the trends in the periodic table represented in this graph?
Explanation:
the option 2 is correct
metals tend to have lower ionizatiin energy than non metals
Can someone please help me with number five thank you!!
Answer:
multiply 7x.3048m and it =s 2.134 meters
Name an element that can be used to date back billions of years?
Using radiometric
Answer:
Uranium-238
Explanation:
Examples:
Original element Decay product Half-life (years)
Uranium-238 Lead-206 4.5 billion
Uranium-235 Lead-207 704 million
Rubidium-87 Strontium-87 48.8 billion
For the reaction: CaO + SO3 → CaSO4, how many moles of CaSO4 are produced
from 40.0 g of SO3?
Answer:
here hope it helps can you mark me brainliest please
Why did the toads disappear
Answer: extremely sensitive to environmental changes caused by habitat destruction, climate change, pollution
Explanation:
Across the world, amphibians have been disappearing at an unprecedented rate — faster than any other group of animals. Frogs, toads, and salamanders are extremely sensitive to environmental changes caused by habitat destruction, climate change, pollution, and invasive species.
Can we change the ratio between the elements?
Answer:A compound is a combination or two or more elements held together by chemical bonds. Compounds can only be separated by chemical processes. Since chemicals are composed of different elements, determining the ratio between the elements can allow you to analyze how much of each compound is present. Such a process is also useful for analyzing chemical reactions that are being performed in chemistry experiments. Making connections between units and how elements combine to form compounds can help you to better understand their ratios.Hydrogen peroxide,H2 O2. There are 2 moles of hydrogen and 2 moles of oxygen giving us a ratio of 2:2. We can reduce this ratio by dividing both numbers by a factor of both of them.