Answer:
Sulfur, Selenium, Oxygen.
Explanation:
In the periodic table, all the elements that are arranged in a group or vertical column have similar properties as well as similar valance electrons. Therefore, the elements sulfur, selenium, and oxygen can be seen in group 16 of the periodic table. Here, the atomic number of oxygen is 8, the atomic number of selenium is 34, and the atomic number of sulfur is 16.
Answer:
Check the following boxes:
Sulfur
Selenium
Oxygen
Explanation: All these nonmetals all have similar chemical properties.
To find the mass of substance the equation is
[Container and Substance] + [Container] = [Substance]
True
False
Answer: FALSE
In order to find the mass of a substance you need to measure the container with the substance in it, and then take a second measurement with the container empty. You would then subtract the two measurements to find the total mass of the substance, you would not add as stated in the question.
A _ serves as a long-term storage area for water or nutrients.
answer) reservoir
The average atomic mass of carbon is 12.01 amu. One isotope of carbon has an atomic mass of 12.00 amu
and the other major isotope of carbon has an atomic mass of 13.00 amu. Calculate the relative abundance of
each isotope.
a. P1 = 0.50 and P2 = 0.50
b. P1 = 0.99 and P2 = 0.01
c. P1 = 0.32 and P2 = 0.68
d. P1 = 0.95 and P2 = 0.05
Explanation:
please refer to the attached file
Answer:
B
Explanation:
So when you are calculating relative abundance you are actually calculating the atomic mass on the periodic table. So you are given the two isotopes of Carbon C-12 and C-13. Now you know that the atomic mass of C is 12.01 so you have to see that you have a lot more C-12 because the atomic mass is close to 12. Now you can calculate them out like this (0.99 x 12.0) +(.01 x 13.00)=12.01.
convert 0.0598 to scientific notation
A doctor is testing a new medication. He changes his results so his hypothesis is correct. He _____.
has a lot of integrity
is following a code of conduct
is committing scientific fraud
is showing high moral standards
Answer:
Scientific fraud! Scientific fraud, an act of deception or misrepresentation of one's own work, violates these ethical standards. It can take the form of plagiarism, falsification of data, and irresponsible authorship. Scientific fraud has been attributed to misdirected attempts to attain high levels of personal and professional success.
Hope this helped <3
How many moles of oxygen atoms are in 7.9E-1 moles of CO_2? Only give the numeric value of your answer. Don’t include the units.
Answer:
The number of oxygen in 7.9 × 10⁻¹ moles of CO₂ is 9.5116 × 10²³ atoms of oxygen
Explanation:
The given parameters are;
The number of moles of CO₂ = 7.9 × 10⁻¹ moles
The number of molecules of CO₂ in one mole of CO₂ = 6.02 × 10²³
The number of molecules, [tex]N_{CO_2}[/tex], of CO₂ in 7.9 × 10⁻¹ moles is given as follows;
[tex]N_{CO_2}[/tex] = 7.9 × 10⁻¹ × 6.02 × 10²³ ≈ 4.76 × 10²³ molecules
The number of atoms of oxygen in one molecule of CO₂ = 2 oxygen atoms
Therefore;
The number of oxygen in 7.9 × 10⁻¹ moles of CO₂ = 2 × 4.76 × 10²³ ≈ 9.5116 × 10²³
The number of oxygen in 7.9 × 10⁻¹ moles of CO₂ ≈ 9.5116 × 10²³ atoms of oxygen.
Which element has the highest electronegativity?
A) Li
B) F
C) Mg
D) Ca
Answer:
The correct answer is B) F
Explanation:
The electronegativity increases from left to right. The more you go right the greater the electronegativity and the more left you go, the lower.
-Hope that helps! :)
You have just won a block of pure 24-carat gold. Have you just procured an element, compound, or mixture?
Answer:
element
Explanation:
24 carat gold is an example of element.
What is element?A fundamental object that is difficult to divide into smaller pieces is known as an element. An element is a substance that cannot be broken down by non-nuclear reactions in chemistry and physics.
The atomic number, or quantity of protons in an element's nucleus, is used to categorize each element. Isotopes can be produced depending on the amount of neutrons in the nucleus.
Isotopes will have different physical properties although sharing the same chemical ones. Deuterium contains one proton and one neutron, tritium has one proton and two neutrons, but normal hydrogen has one proton and no neutrons.
Therefore, 24 carat gold is an example of element.
To learn more about element, refer to the link:
https://brainly.com/question/14347616
#SPJ3
How are molecules built?
Answer:
molecules can be formed by stringing carbon atoms together in a straight line or by connecting carbons together to form rings
Explanation:
molecule exists when two or more atoms join together by forming chemical bonds. ... When atoms of at least two different elements come together to form chemical bonds, these molecules can be called compounds.
What is a Mole...
I need an answer please..
Answer:
Mole, also spelled mol, in chemistry, a standard scientific unit for measuring large quantities of very small entities such as atoms, molecules, or other specified particles.
Explanation:
Answer:
Mole, also spelled mol, in chemistry, a standard scientific unit for measuring large quantities of very small entities such as atoms, molecules, or other specified particles
Describe the difference between an atomic element and a molecular element. Check all that apply. Check all that apply. Molecular elements exist with a single atom as their basic unit. Atomic elements exist with a single atom as their basic unit. H2, F2, and P4 are some examples of atomic elements. H, F, and P are some examples of molecular elements. Atomic elements have more than one atom in their basic unit. H, F, and P are some examples of atomic elements. H2, F2, and P4 are some examples of molecular elements. Molecular elements have more than one atom in their basic unit.
Answer:
Atomic elements exist with a single atom as their basic unit.
H, F, and P are some examples of atomic elements.
H2, F2, and P4 are some examples of molecular elements.
Molecular elements have more than one atom in their basic unit.
Explanation:
Atomic element exists as the smallest particle of an element that can take part in a chemical reaction. They exist with a single atom as their basic unit. The atomic number of an element is the number of protons present in the atomic nucleus of the element. Atomic elements are usually monoatomic such as H, F and P.
Molecular elements are the smallest particle that are capable of independent existence and still retains the chemical properties of those substances. They are capable of independent existence because they are diatomic. The combination of atoms of the same type produces a molecule of an element such as H₂, F₂, and P₂.
calcium oxide (Cao) and carbon dioxide (CO2). If 100 g of
calcium carbonate is allowed to decompose, 56 g of calcium
oxide is produced. What mass of carbon dioxide is produced
by the decomposition?
g
Answer:
Explanation:
CaCO3 → CO2 + CaO
depending on the conservation of mass
mass of the product = mass of the reactant
100 g = ( X + 56 )
mass of CO2 = 100 - 56
= 44 g
Answer:
44g
Explanation:
correct your welcome have a nice day everyone
Element
lon Charge
Nearest Noble Gas
Na
+1
What is the nearest noble gas to sodium?
what would be the mass of 9.03 x 1021 molecules of hydrobromic acid (HBr)?
I need Helpppp pleaseee
Answer:
9) 126.86 amu
Explanation:
Please see the attached picture for full solution.
*I can't see the fractional abundance for Q8. Thus, I am unable to help you with that.
To find the avg atomic mass, multiply the fractional abundance to each of the masses and add them all up.
What is the definition Reactivity
Answer: the state or power of being reactive or the degree to which a thing is reactive.
Explanation:
Identify the control group and the independent and dependent variables in the following scenario: 300 chickens are divided into three equal sized groups. Group A is injected weekly with 10 mg of a growth hormone. Group B is injected weekly with 25 mg of the growth hormone. Group C is not given any growth hormone. All 300 chickens are weighed after again after 3 months.
Answer:
the control group is group c
independent variable - number of mg of growth hormone
dependent variable - growth of chickens
Explanation:
the control has nothing added to it
the growth of chickens DEPEND on the growth hormome :)
Answer:
I saw your question 4 months ago about Overwatch
Explanation:
Im down to play bro lol , I play on pc aswell
hmu, my dis cord is Conspiracy#2546 and btag is Conspiracy#11218
The element with the chemical symbol ______ is a nonmetal help me please
Answer:
O
Explanation:
O is in the red which says nonmetal
a
Which of the following statements is true?
Lysosomes and chloroplasts are unique to plant cells.
O A nerve cell contains more mitochondria than a muscle cell.
Homeostasis on the cellular level is controlled by the cell membrane.
Instead of a cell membrane, plant cells have cell walls.
Answer: Homeostasis on the cellular level is controlled by the cell membrane.
Explanation:
Answer:
C
Explanation:
That's what the first guy said. lol
what element make up organic compounds?
If a cube has a volume of 25.0 mL, what mass, in grams, would it have to have to
be made of gold? Gold has a density of 19.3 g/mL. (Answer only the number with
the correct number of sigfigs) *
Answer:
482.5 grams
Explanation:
Given that,
Volume of a cube is 25 mL
The density of gold is 19.3 g/mL
We need to find the mass of the gold cube. We know that density is equal to the mass per unit volume. So,
[tex]d=\dfrac{m}{V}\\\\m=d\times V\\\\m=19.3\ g/mL\times 25\ mL\\\\m=482.5\ g[/tex]
So, the mass of the gold cube is 482.5 grams.
which event would be impossible to explain by using John Dalton's model of the atom
Answer:
we need the model to answer
Explanation:
Jim investigates how the angle of a throw affects the distance that the ball travels.
Assuming Jim hurls the ball with
the same force each time, what is the dependent variable in the experiment?
angle at which the ball is thrown
distance traveled by the ball
time it takes the ball to hit the ground
O force exerted on the ball
Answer:
force exerted on the ball
Explanation:
)-
symbols
following elements
silver, Copper ,magnesium ,sulphur
Ag,Cu,Mg,S are the answers...............
Answer:
silver-Ag
copper-Cu
magnesium-Mg
sulphur-S
Explanation:
If carbon has 8 electrons is it a cation or anion?
Answer:
carbon is a -4 anion
Explanation:
It needs 4 electrons from other molecule(s)/element(s) to be stable.
Answer:
ation
Explanation:
Which structures perform similar functions in plant and animal cells?
1. Mitochondria, nucleus, cell membrane
2. Vacuole, chloroplast, cell wall
3. Cell membrane, cell wall, nucleus
4. Ribosome, cell membrane, chloroplast
(Please answer for brainliest and a heart, thank you!)
Answer:
2
Explanation:
Sorry if Im wrong
I will give brainliest!!!
Someone administers a toxin that disrupts ribosomal RNA (rRNA) synthesis in the cell above. Which labeled structure would be most negatively impacted by this toxin?
Choose 1 answer:
(Choice A) None of these labeled structures would be negatively impacted.
(Choice B) Structure B
(Choice C) Structure C
(Choice D) Structure D
I will give brainliest!!!
Answer:
D. Endoplasmic reticulum
Explanation:
Because Rough endoplasmic reticulum contains Ribosomes.
If you have difficulty removing a ring from your finger, you usually lubricate your finger with oil or soap
Why, in most cases, does this procedure work
Answer:
Because oil reduces the friction between the surface of your ring and your finger.
Thus it helps you to remove your ring easily
Hope it helps
What is 5928km expressed in scientific notation
Answer:
5.928 x 10^3 km
Explanation:
brainliest to whoever answers, correctly.
