Answer:
The frequencies of light that an atom can emit are dependent on states the electrons can be in. When excited, an electron moves to a higher energy level or orbital. When the electron falls back to its ground level the light is emitted.
How much copper is in 3.79 g of copper
Answer:
3.79 g
Explanation:
An Olympic swimmer can swim a distance of 360m in 8.5 minutes. What is her speed?
Answer:
42.3529412 m/min or 0.705882353 m/s
Explanation:
We can calculate speed using the following formula.
[tex]s=\frac{d}{t}[/tex]
where [tex]d[/tex] is distance and [tex]t[/tex] is time.
The Olympic swimmer can swim 360 meters in 8.5 minutes. Therefore,
[tex]d= 360 \ m \\t= 8.5 \ min[/tex]
Substitute the values into the formula.
[tex]s=\frac{360 \ m}{ 8.5 \ min}[/tex]
Divide.
[tex]s= 42.3529412 \ m / min[/tex]
Her speed is 42.3529412 meters per minute.
If we want to find her speed in meters per second, convert the minutes to second.
1 minute is equal to 60 seconds, so we can multiply 8.5 by 60.
[tex]8.5 *60=510[/tex]
The swimmer can swim 360 meters in 510 seconds.
[tex]s=\frac{d}{t}[/tex]
[tex]d= 360 \ m \\t= 510 \ s[/tex]
[tex]s=\frac{360 \ m}{510 \ s}[/tex]
[tex]s=0.705882353 \ m/s[/tex]
Her speed is also 0.705882353 meters per second.
Imagine a friend is planning a rock-climbing trip. Write a note in the box explaining how gas exchange is affected at the top of a mountain, where air pressure is lower and there is less oxygen than at lower altitudes.
Answer:
Air is less dense on a mountaintop than at sea level.
Air pressure is lower at low altitudes.
As you climb a mountain, air pressure increases.
More force pushes on the air at the bottom of an air column.
As you descend a mountain, air molecules are closer together.
Explanation:
What is the mass of a liquid having a
density of 1.40 g/mL and a volume of
3090 mL?
Answer:
It has a mass of 4.326 grams.
Explanation:
similarities about homogeneous and heterogeneous mixtures
Answer:
A homogeneous mixture has the same uniform appearance and composition throughout. Many homogeneous mixtures are commonly referred to as solutions. A heterogeneous mixture consists of visibly different substances or phases. The three phases or states of matter are gas, liquid, and solid.
Explanation:
yea
Need help with this
Answer:
environmentalism I think
Explanation:
...................
Answer:
2nd choice answer
Explanation:
thats ez tbh
Bonnie wants to see if playing music to plants will help them grow taller. She buys 4 of the same kind of plant. They all receive the same amount of sun and water. She plays rap music to plant A, country music to plant B, rock music to plant C, and plant D gets no music at all. Everyday for a week she measures the height of each plant.
DO NOT HESITATE TP ASK FOR FURTHER EXPLANATION.
HOPE THAT HELPED.49.2 m = _________ hm
What is the name of the binary molecule H2O2
Explanation:
H2O2: hydrogen peroxide.
hope it will help u ✌️
A hair gel is a mixture. Which of the following is true about hair gel?
A. A chemical change is required to separate its mixed components
B. A physical change can separate its mixed components.
C. It is made up of millions of units of a single type of compound.
D. It is made up of millions of atoms of a single element
Answer:
B. A physical change can separate its mixed components.
Explanation:
Atoms and molecules of different elements can come together to form a substance known as MIXTURE. A mixture comprises of several units of different elements or compounds that are not chemically joined together. This is the case of hair gel, which is a mixture i.e. it contains several compounds mixed together in an uneven ratio.
Since the components of a mixture such as the hair gel, are not joined together chemically i.e no chemical bonding or altering of chemical structure occurs between the mixture constituents, they can be separated using physical means. Physical methods of separation such as boiling, chromatography, etc.
I need help with this please.
Flammable materials, like alcohol, should never be dispensed or used near Group of answer choices an open door. a sink. another student. an open flame.
Answer:
An open flame. Hope this helped! :)
How far is it from H to G?
The gold-foil experiment was used to discover which subatomic particle? Question 2 options: electrons protons ==> neutrons (my answer)
Answer:Proton, the gold foil experiment indicated that the nucleus has a positive charge.
i need help with this pls
Answer:
C Is The Correct Answer Because The Deeper The Rock Is The Older It Is So The Top Is The Youngest And The Bottem Is The Oldest
A student performs the following experiment.
Step 1: she pours a colorless solution into a beaker that contains another colorless liquid. Yellow particles appear in the liquid.
Step 2: she lets the yellow particles settle in the beaker and then separates the colorless liquid by decantstion.
What most likely occurred in the beaker?
Answer: A chemical change in step one and a physical change in step two. ( So A) on edu
Explanation:
Answer:
A. a chemical change in step 1 and a physical change in step 2
Explanation:
Correct on Edge 2022!!!
Good luck everyone, you got this! Have a great day!
The density of aluminum is 2.70 g/cm'. If the volume of a piece of aluminum is 90.4 cm', what is
the mass of the aluminum?
Answer:
33.4814814815
Explanation:
90.4/2.70
By using constants in an experiment, you can make sure that you are testing only one
A)experiment
B)variable
C)hypothesis
D)order
Mr.Davies has requested that you wait for 10 more minutes is that informal or formal
Answer:
Formal
Explanation:
Answer:
I think its formal because the question looks a bit fancy by using all the present perfect tense..
hope this helped you
please mark as the brainliest ( if its correct)(ㆁωㆁ)
Which is the electron configuration for boron? 1s22s3 1s22s23s1 1s12s22p2 1s22s22p1
Answer:
electron configuration for boron is 1s22s22p1
Answer:
D
(answer is D)
Neutrons have a
charge?
neutral
negative
positive
Answer:
Neutrons have a neutral charge
Explanation:
A neutron consists of 3 quarks, 1 up and 2 down. The up quark has a charge of + 2/3e, and the down quarks each have a charge of - 1/3e. So, the charges on the 3 quarks tend to cancel out to produce a neutrally charged particle.
The most common isotope of chromium is 52Cr. How many neutrons does an atom of 52Cr have?
a. 24
b. 28
c. 52
d. 80
3. The ratio of an object's mass to its
is called the density of the object.
Answer:
The ratio of an object's mass to its volume is called density of an object
Explanation:
Density=mass/volume
What is the name of alkane having seven carbons atoms in the chain????
Answer:
n-heptane is your answer
Answer:
Hence, C5H12 is called pentane, C6H14 is called hexane, C7H16 is called heptane and so forth. Straight-chain alkanes are sometimes indicated by the prefix n- (for normal) to distinguish them from branched-chain alkanes having the same number of carbon atoms.
Explanation:
If not for human activity how long would carbon stay as fossil fuel
Answer:
1,000 years
Explanation:
1,000 years
According to the U.N. Intergovernmental Panel on Climate Change (IPCC), which issued a special report on CCS in 2005, a properly selected site should securely store at least 99 percent of the sequestered CO2 for more than 1,000 years.
Question 2
Which phrase best describes an apple?
O homogeneous compound
O heterogeneous substance
O homogeneous mixture
O heterogeneous mixture
Answer:
an apple is best described as a heterogeneous mixture.
The phrase that best describes an apple is heterogenous mixture because it is made up of a different materials.
What is a mixture?A mixture is combination of different components that can be uniform or dispersed and homogenous or heterogenous. A homogenous mixture is the one in which the two or more components are dissolved together to form only one phase.
A heterogenous mixture is composed different phases with uniform or irregular arrangement of materials. Heterogenous mixtures look like a nonseparated random particles which are clearly distinguishable by eyes.
Apple is not a compound but is a mixture made up of different components such as water, pulp, seeds, pigments etc. and each forms their own phases.
Hence, Apple can be termed as a heterogenous mixture.
To learn more about homogenic mixture, find the link below:
https://brainly.com/question/1970755
#SPJ5
Which of the following has a negative charge? A.neutrino B.electron C.alpha particles D.gamma rays
Answer:
B. Electrons
Explanation:
Protons have a positive (+) charge.
Neutrons have a neutral (0) charge.
Electrons have a negative (-) charge.
Alpha Particles is a helium atom.
Gamma Rays are radiation.
Neutrino is Quantum Physics.
Diffrentiate between atoms and ions.
There are 5 areas of chemistry:physical chemistry, organic chemistry, analytical chemistry, biochemistry and inorganic chemistry.identify which of the five area of chemistry best fits the action done by zoe, a chemist. zoe is using an instrument called a spectrophotometer to precisely determine the levels of various chemicals in a sample of drinking water.
If someone could help me I would really appreciate it. Thank you!
Answer:
Analytical chemistry
Explanation:
because in analytical chemistry checks that different chemicals in water,salt etc....
A marathon is approximately 42.195 km Convert the distance to
centimeters.
Answer:
4219500 centimeters
Explanation:
I hope this helped!