Answer:
running helps my heart beat
Answer:
Exercise: The easiest and most effective way to achieve a lasting lower heart rate is to do regular exercise. 2. Stay hydrated: When the body is dehydrated, the heart has to work harder to stabilize blood flow. Throughout the day, drink plenty of sugar- and caffeine-free beverages, such as water and herbal tea.
What is the molecular formula of the molecule that has an empirical formula of CH2O and a molar mass of 120.12 g/mol
Answer:
C4H8O4
Explanation:
Let (CH20)x
C=1*12.01=12.01 (12.01, 1.01, 16.00 Avg mass of elements)
H=2*1.01=2.01
O=1*16.00=16.00
12.01 + 2.01 + 16.00 = 30.03
120.12/30,03=4
==> (CH2O)4 = C4H8O4
The molecular formula of the molecule that has an empirical formula of [tex]CH_2O[/tex] is equal to [tex]C_4H_8O_4[/tex].
Given the following data:
Empirical formula = [tex]CH_2O[/tex]Molar mass = 120.12 g/mol.Scientific data:
Molar mass of oxygen = 16 g/mol.Molar mass of hydrogen = 1 g/mol.Molar mass of carbon = 12 g/mol.To determine the molecular formula of the molecule that has an empirical formula of [tex]CH_2O[/tex]:
First of all, we would find the molar mass of [tex]CH_2O[/tex]:
[tex]CH_2O =12 +(1\times2)+16\\\\CH_2O =30\;g/mol[/tex]
For molecular formula:
[tex](CH_2O)n = 120.12\\\\30n = 120.12\\\\n=\frac{120.12}{30}[/tex]
n = 4.0
[tex](CH_2O)_4 = C_4H_8O_4[/tex]
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An object is located 360 millimeters from a converging lens. The image formed is 150 millimeters high, at a distance of 90 millimeters from the lens. What’s the height of the object?
The height of the object : 600 mm
Further explanationGiven
d object=360 mm(object distance)
d image=90 mm(image distance)
Required
h object
Solution
focal length = f :
[tex]\tt \dfrac{1}{f}=\dfrac{1}{d_o}+\dfrac{1}{d_i}\\\\\dfrac{1}{f}=\dfrac{1}{360}+\dfrac{1}{90}\rightarrow f=72~mm[/tex]
The magnification :
[tex]\tt M=\dfrac{d_i}{d_o}=\dfrac{90}{360}=0.25[/tex]
[tex]\tt M=\dfrac{h_i}{h_o}\\\\0.25=\dfrac{150}{h_o}\rightarrow h_o=600~mm[/tex]
A student uses a magnet to move a 0.25kg metal ball. The magnet exerts a force of 5N on the ball. What is the acceleration of the ball when it begins to move ?
Answer:
20 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]
f is the force
m is the mass
From the question we have
[tex]a = \frac{5}{0.25} \\ [/tex]
We have the final answer as
20 m/s²Hope this helps you
a 13 letter word for a region around the nucleus of an atom whose electrons are likely to be found?
electron shell
Explanation:
first to answer correctly gets brainleist
Which lunar phase will occur approximately 7 days after a first quarter moon?
a
New moon
b
Full moon
c
Waxing crescent
d
Waning crescent
Answer:
c. Waxing crescent
- I hope this helps have a great night
Answer correctly please !!!!!!!!!!!!!!! Will mark brainliest !!!!!!!!!!!!!!!!!
How are a mole and a dozen similar?
Answer:
Each names a given number of objects.
Explanation:
which equation is derived from the combined gas law?
Answer:
The correct answer is V1/T1=V2/T2.
Explanation:
Just took the test
Answer:
Its A on edge :)
Explanation:
For your 13th answer in #4, what is the other name for this particle?
Answer:
The First layer is the troposphere. The troposphere is what we live in. It creates weather for us. Second layer is the Stratosphere. You will find the ozone layer in it. The ozone layer helps protect us from ultraviolet radiation (UV) from the sun. In fact, the ozone layer absorbs most of the UV radiation the sun sends to us. Life as we know it wouldn't be possible without this layer of protection. Third layer is Mesosphere. The Mesosphere is very important for earth's protection. The mesosphere burns up most meteors and asteroids before they are able to reach the earth's surface. Fourth layer is Thermosphere. The Thermosphere absorbs the sun radiation making it very hot.
Explanation: I don't know if you include this one but the fifth layer is the Exosphere. Although the exosphere is the most distance layer of earth's atmosphere it is the layer that is the planet's first line of defense against the sun's rays. It is also the first layer to come into contact and protect the earth from meteors, asteroids, and cosmic rays.
Answer:
Explanation:
The really interesting characteristic of the atmosphere is that each layer has a different temperature range. That is truly incredible when you list them.
The first layer is the troposphere. It is the layer closest to the earth's surface. It is 12 km high and goes from 15oC to - 56oC
The next layer is the Stratosphere. It is 38 km above the Troposphere and the temperature goes from -56 to -2.5
The third layer is Mesosphere. It is 40 km above the Stratosphere and the temperature goes from -2.5 to -86.5
The next layer is the Thermosphere. It is 710 km above the Mesosphere. It goes from - 86.5 to 1200o C So this goes from - 100 roughly to + 1200. That is a massive distance. It speaks wonders of how balanced this planet really is.
The final layer is the Exosphere. It goes up to 3000 km. The temperature is consistently at 1200oC
What I don't understand is how you get the layers from a 13 answer of something. What is the first name of the particle? That would seem to have nothing to do with this answer. Please explain because this was a good deal of work that might be for nothing. Mind you the answer is very interesting.
What very specific property of mineral calcite allows geologists to quickly identify it in a mixture of other colorless minerals
The kidneys play a major role in the urinary system. Which of these is NOT a function of the kidneys?
A)
The kidneys help regulate overall fluid balance.
B)
The kidneys make and store urine until it can be expelled from the bladder.
C)
The kidneys create hormones that help produce red blood cells, promote
bone health, and regulate blood pressure.
D)
The kidneys filter out a variety of water-soluble waste products and
environmental toxins into the urine for excretion.
Answer:
C
Explanation:
two differences between atom and molecules
Answer:
Molecules are made of atoms. atoms are smaller. molecules have no electrons, atoms do.
Answer:
well one of the begins with and A while the other one begins with a M, joking so the difference between an atom and a molecules is that, An atom is the smallest unit of matter that retains all of the chemical properties of an element. while Molecules can be described as the smallest particle of an element or a compound, which is capable to exist independently and shows all the properties of the respective substance. Hope this helps :)
Explanation:
i will give braniliest
During World War II, the Nazi government in Germany imprisoned and murdered millions of Jews. This is known as the _____.
A.Fascism
B.Holocaust
C.Nationalism
D.Great Depression
Answer:
B
Explanation:
Choose the correct one plz!
Answer:
b
Explanation:
Answer:
13 N to the right
Explanation:
Someone help with this ions and isotopes worksheet?
Isotopes are atoms of the same element that have different numbers of neutrons. Protons are positively-charged particles found in the nucleus of an atom.
Electrons are negatively-charged particles found in the outer shell of an atom. The charge on an element is determined by the number of protons and electrons present in the atom.
a.) Li+: number of protons = 3
Number of electrons = 2
charge of Li+ = +1
b.) Be2+: number of protons = 4
Number of electrons = 2
charge of Be2+ = 2+
c.) C4+: number of protons = 8
Number of electrons = 4
charge of C4+ = 4+
d.) O2-: number of protons = 8
Number of electrons = 10
charge of O2- = -2
e.) N3-: number of protons = 7
Number of electrons = 10
charge of N3- = -3
f.) C4- : number of protons = 4
Number of electrons = 4
charge of C4- = -4
g.) 14C6: The mass number = 14
Atomic number = 6
Number of neutrons = 8
h.) 18O8: The mass number = 18
Atomic number = 8
Number of neutrons = 10
i.) 19F9: The mass number = 19
Atomic number = 9
Number of neutrons = 10
j.) 40Ca20: The mass number =40
Atomic number = 20
Number of neutrons = 20
k.) 37Cl17: The mass number = 37
Atomic number = 17
Number of neutrons = 20
l.) 238U92: The mass number = 238
Atomic number = 92
Number of neutrons = 146
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Consider X + Z -> ?
Assuming the following:
The product is an ionic compound.
Element X has 2 valence electrons
Elements Z has 6 valence electrons
Which general formula would be created?
A)ZX
B)Z^2x
C)XZ
D)X2^Z
Answer:
C
Explanation:
Element Z acquires two electrons from element X for stability
Divergent tectonic plate boundaries most commonly form one: A non-volcanic islands. B ocean trenches C continental mountains D ocean ridges
Answer:
D. ocean ridges
Explanation:
Answer:
I think A
Explanation:
Most volcanoes form at the boundaries of Earth's tectonic plates. ... The two types of plate boundaries that are most likely to produce volcanic activity are divergent plate boundaries and convergent plate boundaries
What type of ion would be created if magnesium lost 2 electrons?
cation
anion
neutral ion
Answer:
Explanation:
It is not neutral.
Magnesium would have a charge of plus 2. That makes it a cation. The Cathode attracts + charged ions.
Help with the questions ^
Answer:
The arrows are moving in the same direction so you will add the two forces 50N and 30N
Net force = 50 N + 30 N = 80N
and the box will move in the direction of arrow (ie, the same direction of force applied)
An experiment calls for each student to use 3.50 g of sodium hydroxide.
There is only 78.2 g of sodium hydroxide remaining. How many students
can complete the experiment?
Answer:
22 students
Explanation:
i just answered that question on a quiz and its correct lol
Choose all the answers that apply.
Argon (Ar) is in group 18. Argon _____.
forms a salt when combined with a metal
has 18 electron shells
has properties similar to other elements in group 18
does not react readily with other elements
is part of the noble gas group
!(more than one answer)!
Answer: has properties similar to other elements in group 18, does not react readily with other elements, is part of the noble gas group
Explanation: I’ve done on edg before
how can one separate and collect the solvent from a salt solution
how does the octet rule predict the stability or reactivity of atoms.
Answer:
Explanation:
The octet rule allows chemists to predict the placement of electrons around the nucleus (electron orbitals), the identification of electrons added or lost during chemical reactions and the chemical reactivity of atoms based upon their particular electron configuration.
According to the text, which amino acid(s) contains a side chain..
a. in which molecules form covalent disulfide bridges with each other?
b. that is hydrophobic?
c. that forms hydrogen bonds?
d. that is basic?
Answer:
(b) that is hydrophobic
Explanation:
e.g, alanine
Cause, Alanine possess hydrophobic side chain and the most appropriate answer is (d) part......
Alanine is an aliphatic amino acid, because the side-chain connected to the α-carbon atom is a methyl group (-CH3), alanine is the simplest α-amino acid after glycine. The methyl side-chain of alanine is non-reactive and is therefore hardly ever directly involved in protein function..
Hope it will help you☺☺☺☺☺
Answer:
(b) that is hydrophobic
Explanation:
e.g, alanine
Cause, Alanine possess hydrophobic side chain and the most appropriate answer is (d) part......
Alanine is an aliphatic amino acid, because the side-chain connected to the a-carbon atom is a methyl group (-CH3), alanine is the simplest a-amino acid after glycine. The methyl side-chain of alanine is non-reactive and is therefore hardly ever directly involved in protein function...
Hope it helps....
If the name of a compound ends in -ide, we know that the compound is made of __________ elements. What completes the sentence?
Answer:
Two
Explanation:
How many oxygen atoms are there in
Fe203?
Answer:3 oxygen atoms.
Explanation: Each formula unit of Fe2O3 contains 2 atoms of iron and 3 atoms of oxygen (technically they are ions, but that doesn't matter).
A hydrate of CoCl2 has a mass of 15.80 g before heating. After heating the mass of the anhydrous compound is found to be 9.32 g explain how you would determine the formula of the hydrate and then write out the full name of the hydrate
Explanation:
Molar mass of Cobalt (II) chloride = 129.8g/mol
Moles of CoCl2 = 9.32/129.8 = 0.0718mol
Mass of H2O lost after heating = 15.80 - 9.32 = 6.48g
Moles of H2O = 6.48/18 = 0.36mol
Mole ratio of CoCl2 : H20
= 0.0718mol : 0.36mol
= 1 : 5
Hence the formula is CoCl2 . 5H2O, which is Copper (II) chloride pentahydrate.
giving brainliest if correct!! please help someone out?
Answer:
protons: 36
neutrons:48
electrons:36
Explanation:
the number of protons in an element is = to the atomic # (36)
the number of neutrons is the atomic mass - atomic # (84-36=48)
In a neutral charged element the # of protons = # of electrons
The speed of light is 300,000,000 m/s. What is the frequency of microwaves with a wavelength of 0.01 meter?
Answer:
30,000,000,000 Hz
Explanation:
I searched it up and got 3 x 10^10 and thats 30000000000
Which of these are qualititative descriptions?
A
Horror Films
B
78 Baboons
C
1 Dollar
D
1,000,000,000 Nugget