Answer:
1,6,8
Explanation:
Periodic Table- H=1.C=6,O=8
Hydrogen is H, Carbon is C, Oxygen is O
One molecule of the sample contains three different elements with atomic numbers 1,6 and 8.
What is an element?Element is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.
Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.
The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.Each element has its own characteristic property.
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Your question is incomplete, but most probably your full question was,a sample substance has the chemical formula:
H2CO3
One molecule of the sample contains -
Two different elements with atomic numbers 1 and 27
Two different elements with atomic numbers 1, 6, and 8
Two different elements with atomic numbers 2 and 29
Two different elements with atomic numbers 2, 8 and 20
Three different elements with atomic numbers 1,6 and 8
How many molecules of CO2 are contained in 4.40g of CO2
Answer:
6.02 x 10²²molecules
Explanation:
Given parameters:
Mass of CO₂ = 4.4g
Unknown:
Number of molecules in CO₂ = ?
Solution:
To find the number of molecules in the given mass, we have to find the number of moles in the compound first;
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of CO₂ = 12 + 2(16) = 44g/mol
Insert the parameters and solve;
Number of moles = [tex]\frac{4.4g}{44g/mol}[/tex] = 0.1mol
1 mole of a substance contains 6.02 x 10²³molecules
0.1 mole of CO₂ will contain 0.1 x 6.02 x 10²³molecules
= 6.02 x 10²²molecules
I WILL GIVE A LOT OF EXTRA POINTS. PLEASE ANSWER ALL OF THEM
75 for all
Explanation:
Answer:
Explanation: Li= Lithium, Na= Sodium, K= Pottasium, Rb= Rubdium Cs= Cesiuna, Fr= Fransium
6. Energy levels increases as if you move down a group during the number of electrons increases again.
7. A charge with higher and effective nuclear charge makes greater attractions to the electrons, pulling the electrons cloud closer to the nucleus makes it in a smaller atomic radius.
8. Ge= Germanium, He= Helium, O=Oxygen, Barium
How many elements are in H
a) 3
b) 2
c) 1
d) 5
Answer: C (1)
Explanation:
H is only the element hydrogen.
Hydrogen bond is not formed by 1) oxygen 2) nitrogen 3) chlorine
PLEASE HELP!!!
i mean which cant form hydrogen bond
Answer:
Chlorine
Explanation:
Even though chlorine is highly electronegative, the best answer is no, and in this class we will consider chlorine not to form hydrogen bonds (even though it has the same electronegativity as oxygen). This is because chlorine is large and its lone electron is in a diffuse orbital, covering a large area, and thus do not have the high charge density to act as a strong hydrogen bond acceptor. But it does form weak hydrogen bonds in solid crystalline hydrogen chloride at very low temperatures.
A physical change is when the atoms combine to create a new product.
>True
>False
Barry purchased a whole life insurance policy. Which of the following choices is true?
Answer:
where the following choices??
Explanation:
The lowest allowable energy state of an atom is called its .
Pedro's book weighs 19/4 pounds. Blanca's book weighs 17/7 pounds. Use estimation to determine about how much more Perdro's book wweighs than Blanca's.
A 1lbs
Sorry I meant math.
B 2lbs
C 6lbs
D 7lbs
Answer:
2pounds
Explanation:
Given parameters:
Weight of Pedro's book = [tex]\frac{19}{4}[/tex] pounds
Weight of Blanca's book = [tex]\frac{17}{7}[/tex] pounds
Unknown:
How much more does Pedro's book weigh more than Bianca's book ?
Solution:
To Solve this problem, let us convert the fractions to decimal;
Weight of Pedro's book = 4.75 pounds
Weight of Bianca's book = 2.43 pounds
Differences = 4.75pounds - 2.43 pounds
= 2.32 pounds
Estimating gives 2pounds
Suzanne has a cat and uses a pet carrier to take her cat to the veterinarian. After a few years, the cat runs away and hides every time Suzanne gets the carrier out. Which best describes the cat's behavior? instinct reflex conditioned imprinting
Answer:
conditioned
Explanation:
The best term to describe the behavior of the cat is conditioned.
The cat has been conditioned to respond in a specific way to the pet carrier over time due to certain experiences - most likely, unpleasant ones. With repeated unpleasant experience associated with the per carrier, the cat has been conditioned to dislike/fear the pet carrier and thus, the recorded behavior.
Answer:
conditioned
Explanation:
Which of the following best describes an Arrhenius acid-base reaction?
Answer:
A. Acid + base = salt + water
Explanation:
correct for a pex
The correct option is (a) Acid + base = salt + water .
Sweden's Svante Arrhenius proposed the concept of acids and bases in 1884 based on the theory of ionization. According to Arrhenius, acids are hydrogen-containing compounds that release H + ions or protons when dissociated in water, and bases are hydroxide compounds that release OH-ions when dissociated in water. Acid + base = salt + water Neutralisation is a reaction between an acid and an alkali that forms a salt and water. Salts are odourless and have a salty taste, and many are soluble in water. Common examples include sodium chloride, potassium iodide, calcium carbonate and copper sulfate. The pH scale is used to measure acidity and alkalinity.Learn more about Neutralisation here https://brainly.com/question/23008798
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How many atoms are in 1.65 mol of potassium
Answer:
9.93 × 10²³ atomsExplanation:
The number of atoms of potassium can be found by using the formula
N = n × Lwhere n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
N = 1.65 × 6.02 × 10²³
We have the final answer as
9.93 × 10²³ atomsHope this helps you
Determine the possible traits of the calves if:
A red bull (RR) is mated to a red (RR) cow 1
Answer:
A red (RR) bullis mated with white (WW) cow 1
Answer:
A roan (RW) is mated with red(RR)cow 3
Answer:
Answer:
1. All red calves i.e. RR
2. All roan calves i.e RW
3. 2 red calves (RR) and two roan calves (RW)
Explanation:
According to this question, a gene coding for fur colour in cattle is involved. Red alleles (R) and white alleles (W) are co-dominant to produce a roan cattle (RW). The possible traits of the following crosses are (see attached punnet square):
1) A red bull (RR) is mated to a red (RR) cow: All red calves i.e. RR
2) A red (RR) bullis mated with white (WW) cow: All roan calves i.e RW
3) A roan bull (RW) is mated with red (RR) cow: 2 red calves (RR) and two roan calves (RW).
A student needs to use sodium nitride in an experiment and finds a chemical with the formula NaNO3 . Is this the correct compound? Why or why not?
A. Yes, NaNO3 is the formula for sodium nitride.
B. No, NaN is the formula for sodium nitride; NaNO3 is the formula for sodium nitrate.
C. No, NaN is the formula for sodium nitride; NaNO3 is the formula sodium nitrite.
D. No, Na3N is the formula for sodium nitride; NaNO3 is the formula for sodium nitrat
Answer:
Yes, NaNO3 is the formula for sodium nitride.
PLEASE HELP! THIS A TIMED QUIZ!!
Scientists found an artifact that has 25% of Carbon-14 left. Based on how much Carbon-14 is remaining, how old is the artifact that was found?
A). 17,100 years
B). 5,700 years
C). 22,800 years
D). 11,400 years
Answer: D
Explanation:
A 1.5 m block of tungsten has a mass of 28 875 kg.
Write down the equation that links density, mass and volume.
Explanation:
Density is an intensive property of any matter. Any given pure sample of a substance will have the same density value.
Density is the mass per unit volume of a compound;
Mathematically;
D = [tex]\frac{M}{V}[/tex]
where M is the mass
V is the volume
D is the density
Which of the following laboratory procedures best illustrates the law of conservation of mass? (Assume the product of the reaction includes the mass of any unused reactants.) (3 points)
Reacting 12 g of C with 32 g of O2 to form 44 g of CO2
Weighing 100 g of Cu powder and 100 g of Fe filings
Heating 100 g of CaCO3 to produce 56 g of CaO
Dissolving 10 g of NaCl in 100 g of water
Answer: Reacting 12 g of C with 32 g of O2 to form 44 g of CO2
Explanation: I took the test just now, and the law of conservation of mass means to energy and that is exactly what they do in this answer!
Answer:
A
Explanation:
Compression is the type of stress that deforms rock at which location ?
Answer:
Compression is common at convergent boundaries, tension in divergent boundaries, and shear at transform boundaries.
Explanation:
The three main types of stress go along with the three types of plate boundaries. Rocks can bend and fold. Rocks can also fracture and break.
How many elements do all the “s” orbital span (go across) in each period?
a) 2
b) 6
c) 10
d) 14
The elements do all the “s” orbital span (go across) in each period is 2. Thus option a is correct.
What are elements?Elements are defined as a pure substance made up of only one sort of atom with the same number of protons in its nucleus.
It can also be defined as the a substance that can't be broken down into anything else.
Sublevels are defined as a quantum theory-defined energy level Sublevels are energies associated with electrons in chemistry.
There are mainly four sublevels
s sublevelp subleveld sublevelf sublevelThus, the elements do all the “s” orbital span (go across) in each period is 2. Thus option a is correct.
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Which element would have chemical reactions most similar to fluorine (F)?
A. O
B. Br
C. Ne
D. Fm
giving brainliest if right
[tex]\mathrm {Hey, there!}[/tex]
The answer is: Bromine
Oxygen is not similar to flourine, it is not a noble gas with high ionization.
Neon does not have chemical reactions like flourine.
The answer is Bromine! Best of Luck!
Answer:
Br
Explanation:
HELP PLEASE ANSWER ASAP!!!!!
When atoms react, they often lose, gain, or share electrons to form a more stable version of themselves. For example, alkali metals such as sodium (Na) lose their outer shell electron in their reactions to form compounds. The electron configuration of alkali metals would then resemble those of which group of the periodic table in the compounds they form?
a. 7A or group 17
b. 8A or group 18
c. 2A or group 2
d. 1A or group 1
Answer:
D
Explanation:
help me please I really need it
a) Magnesium, 2.8.2, Group number 2,Metals, They are not non metals.
b) Fluorine, 2.2.5, Group number7, Metal No, Non-Metal yes
c) Carbon, 2,2,2. Group number 4, Metal No, Non-Metal yes
_____________________________________Best Regards,'Borz'Which chemical family below would the element iodine most likely belong to?
The chemical family that the element iodine should belong to is halogen.
The following information related to the halogen is:
It is the subset that has chemical elements i.e. reactive. It is in Group 17 on the periodic table that should be existed in the environment as the compounds instead of the pure elements.The other type of halogens should consist of fluorine (F), chlorine (Cl), etc.Therefore we can conclude that the chemical family that the element iodine should belong to is halogen.
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How are elliptical galaxies different from spiral galaxies?
a. They contain older stars and less gas and dust.
b. They contain younger stars and more gas and dust.
c. They are bigger than spiral galaxies.
d. They are smaller than spiral galaxies.
Answer:
A. They contain older stars and less gas and dust.
Explanation:
There are three types of galaxies:
elliptical galaxiesspiral galaxieslenticular galaxiesElliptical galaxies are galaxies shaped like an ellipse, while spiral galaxies consist of a flat, rotating disk that contains stars, gas, and dust, and a central concentration of stars called the bulge.
The difference between elliptical and spiral galaxies is in the amount of gas and dust they contain. Spiral galaxies contain large amounts of gas and dust, which means that new stars are born very often. This makes them brighter than relatively dim elliptical galaxies, which contain less gas and dust. This is why fewer new and brighter stars are born in elliptical galaxies, leaving them with older, dimmer stars.
what is the chem formula for chromium (V) chloride?
A 100g of sample of a compound is combusted in excess oxygen and the products are 2.492g of CO2 and 0.6495 of H2O. Determine the empirical formula of the compound?
The empirical formula : C₁₁O₁₄O₃
Further explanationThe assumption of the compound consists of C, H, and O
mass of C in CO₂ =
[tex]\tt \dfrac{12}{44}\times 2.492=0.680~g[/tex]
mass of H in H₂O =
[tex]\tt \dfrac{2.1}{18}\times 0.6495=0.072~g[/tex]
mass of O :
mass sample-(mass C + mass H)
[tex]\tt 1-(0.68+0.072)=0.248`g[/tex]
mol of C :
[tex]\tt \dfrac{0.68}{12}=0.056[/tex]
mol of H :
[tex]\tt \dfrac{0.072}{1}=0.072[/tex]
mol of O :
[tex]\tt \dfrac{0.248}{16}=0.0155[/tex]
divide by 0.0155(the lowest ratio)
C : H : O ⇒
[tex]\tt \dfrac{0.056}{0.0155}\div \dfrac{0.072}{0.0155}\div \dfrac{0.0155}{0.0155}=3.6\div 4.6\div 1\\\\\dfrac{11}{3}\div \dfrac{14}{3}\div \dfrac{3}{3}=11:14:3[/tex]
simply parmanent tissue real life application please help it's for my project
Rosa lives in New York City, which has an average altitude of 33 feet. When she is at home, it takes her 10
minutes to cook noodles in boiling water. She decides to go on a camping trip to Mount McKinley. Her
campsite is located 11,000 feet above sea level. Write the answer to each.
A) Where will the atmospheric pressure be higher: at her home or her campsite?
B) Where will the boiling point be higher?
C) Will the noodles cook faster, slower, or at the same rate at her campsite than home?
Answer:
Home
Home
Slower
Explanation:
A liquid starts changing its phase to gas when the two pressures become the same i.e., vapor and atmospheric.
At a higher altitude the atmospheric pressure lowers so little amount of heat is required for the vapor pressure of water to equalize with the atmospheric pressure at a higher altitude.
The pressure at the Rosa's home will be higher and lower in the campsite.
The boiling point will be higher at her home.
As the boiling point is lower in the campsite the water used in cooking noodles will evaporate faster this may lead to the noodles being under cooked. The water may evaporate before the noodles have cooked. So, the noodles will cook at a slower rate at the campsite and faster in her home.
A. The atmospheric pressure at Rosa's home is higher than her campsite.
B. The boiling point of water at Rosa's home is higher.
C. The noodles will be cooked faster at Rosa's home compared to at the campsite
A. The pressure has been the force that has been exerted by the molecules against each other, The higher altitude has lesser air molecules, which resulted in the lower pressure.
Since the pressure at 33 feet has been higher as than the pressure at 11,000 feet altitude, the atmospheric pressure at Rosa's home is higher than her campsite.
B. The boiling point has been the temperature at which liquids have been converted to gases. With the decrease in atmospheric pressure, there has been a lowering in the boiling point as well.
The atmospheric pressure at Rosa's home is higher compared to her campsite. Thus, the boiling point of water at Rosa's home is higher.
C. The lower atmospheric pressure at the campsite has been responsible for the lower boiling point of the temperature, This implies that water has converted to steam at lower temperatures. The lower temperature of water requires more time for the noodles to be cooked.
Thus, the noodles will be cooked faster at Rosa's home compared to at the campsite.
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state the iupac name for CH₃(CH2)₃C(CH₃)₃
Answer:
CH3CH2COCl consists of three carbon atoms in the parent chain and chloroformyl group(-COCl). Therefore the name of the compound is Propanoyl chloride.
Where is most of the water on earth found? What percentage?
Answer:
The ocean holds about 97 percent of the Earth's water; the remaining three percent is found in glaciers and ice, below the ground, in rivers and lakes. Of the world's total water supply of about 332 million cubic miles of water, about 97 percent is found in the ocean.
wait..if you asking about the country it's Brazil✌️
How many atoms are in this compound?
C4H10N5O5
Answer:
24 atoms
Explanation:
4+10+5+5