2H₂ + O₂ ⇒ 2H₂O
Further explanationConservation of mass states that
In a closed system, the masses before and after the reaction are the same
So it can be concluded
mass of the reactants = mass of the productsmass cannot be created or destroyedThe number of atoms involved in a reaction remains the same⇒ number of moles also the samechemical equation in balanced formSo let's see which of the several options , which one has the same number of atoms on both sides of the equation
2H₂ + O₂ ⇒ 2H₂O
H ⇒ left 4, right 4
O ⇒ left 2, right 2
so the equation is in balance and represents the Law of Conservation of
Mass
If Maria winks exactly 5 times every minute while she is awake and she sleeps exactly 8 hours a day, how many times does Maria wink in a day? winks/day.
Answer:4,800
Explanation:
5 winks a minute, 60 minutes in an hour.
300 winks an hour, 16 hours a day.
4,800.
Answer:
The answer is 4,800 winks per day.
Explanation: There are 24 hours in a day, 24 minus the 8 hours shes asleep is 16. There are 60 minutes in an hour. 5 x 60 is 300. 300 winks an hour multiplied by the 16 hours she's awake is 4,800.
A mixture that is uniformly mixed is called __. a homogeneous b heterogeneous c suspension d colloid
Answer:
a. homogenous
Answer: A. homogeneous
Explanation: A mixture that is uniformly mixed is called homogeneous.
Plz mark brainliest:)
How many days does the waxing and waning phase of the moon last on average? *
Answer:
7.38 days.
Explanation:
Find the percent of oxygen in CaClO3)2 Show your work
WILL GIVE 5 STAR RATING AND BRAINLIEST IF YOU ANSWER FIRST AND CORRECTLY
What are the total number of elements in C₄H₉OH ?
A student found the mass of a brick: 50 grams. The volume was 10 cubic centimeters. If the student had 5 bricks, what would be the total density?
Answer:
The answer is 5 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question
The mass of one brick is 50 g
the volume of one brick is 10 cm³
Since the student had 5 bricks
Total mass = 5 × 50 = 250 g
total volume = 5 × 10 = 50 cm³
So the total density is
[tex]density = \frac{250}{50} = \frac{25}{5} \\ [/tex]
We have the final answer as
5 g/cm³Hope this helps you
i must be present in a compound for it considered organic
Answer:
Carbon
Explanation:
Organic compounds must contain carbon. They also usually contain hydrogen, oxygen, and often nitrogen and other compounds such as phosphorus.
Nearly all organic compounds contain carbon-hydrogen bonds.
2. Which atom is larger, Na or Al? Explain why.
Answer:
Na
Explanation:
Because it has the highest protons and electrons(Atomic mass)
Which molecule is the most polarizable?
N₂
O2
CH4
CO2
Answer:
CO2 I was wrong about methane
The __________________ in a chemical formula tells you how many atoms you have of a particular element.
chemical symbols
arrow
subscript
coefficient
I believe the answer is subscript
4. Which elements would have similar properties to potassium?
A. Lithium and Sodium
B. Bromine and Krypton
C. Calcium and Scandium
D. Cobalt and Rhodium
Answer:
The answer is A. Lithium and Sodium
Groups of specialized cells working together are called
Groups of specialized cells working together are called tissue
It's how many atoms are in two water molecules (H2O)?
Answer:
The chemical formula for water is H2O which means that every molecule of water has 2 atoms of hydrogen (H) and one atom of oxygen (O). Here comes the key part. From the Periodic Table of Elements, one sees that one mole of hydrogen atoms weighs 1 gram while one mole of oxygen atoms weighs 16 grams.
Explanation:
:)
The number of atoms present in two water molecules is 6 atoms. 4 hydrogen atoms and 2 oxygen atoms.
What are atoms?Atoms are the basic unit of a substance. An atom is made of a nucleus, protons, neutrons and electrons. Different atoms combines to form a molecule and molecules combines to form compounds.
Water has the formulas H₂O, thus one molecule of water contains 2 hydrogen and one oxygen. Therefore, two molecules of water that is (H₂O)₂ have 4 hydrogen and 2 oxygens thus, a total of 6 atoms.
Hence, the number of atoms present in two molecules of water is 6.
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what are twoparts of an atom
3.Zinc has an atomic number of 30 and a mass number of 65, how many neutrons does it have?
30
65
35
95
Answer:
35
Explanation:
Given parameters:
Atomic number of zinc = 30
Mass number of zinc = 65
Unknown
Number of neutrons = ?
Solution:
The mass number of an atom is the sum of its protons and neutrons;
Mass number = Protons + neutrons
Atomic number is the number of protons in an atom;
Atomic number = Protons
So;
Mass number = Atomic number + Neutrons
Neutrons = Mass number - Atomic number
Neutrons = 65 - 30 = 35
The number of neutrons in the atom is 35
Which characteristic of a substance is considered a chemical property?
its boiling point
its reactivity
its density
its conductivity
Answer:
Reactivity
Explanation:
a chemical reacting to another chemical is considered a Chemical property because chemicals react with other chemicals differently. Pls PLs give me brainliest
Answer:
reactivity
Explanation:
Is 5O2 a Element or Compound?
A hiker tries to prepare a hard-boiled egg on the high slopes of Mount Everest. The base camp is located 5,300 meters above sea level. The hiker observes that the water begins to boil at 82⁰C, much lower than the 100⁰C needed to cook the raw egg. He hopes that just leaving the egg in the boiling water longer will let the egg cook. Will he have hard-boiled eggs for breakfast?
Answer:
He will not have hard-boiled eggs for breakfast
Explanation:
The given parameters are;
The elevation at which the base camp of the hiker is located = 5,300 meters
The boiling point of water at the elevation of the base camp = 82°C
The temperature required to cook the raw egg = 100°C
Therefore, we have;
The temperature of the boiling water at the given elevation of the base camp 82°C < The temperature required to cook the raw egg 100°C
Therefore, the eggs will not be hard boiled.
The hiker won't have hard-boiled eggs for breakfast as a result of the
boiling point of water being less than 100⁰C.
The boiling point decreases with an increase in altitude. The hiker was at
5,300 meters above sea level which made the boiling point of water to be
decreased to 82⁰C.
Since the water isn't able to achieve the boiling point of 100⁰C, then the raw
egg won't be hard boiled for breakfast.
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NEED HELP FAST!!!!
Points A and B are locations on the banks of a river. What are the dominant processes occurring at locations A and B? *
A. deposition at location A; erosion at location B
B. erosion at location A; deposition at location B
C. deposition at both locations A and B
D. Erosion at both locations A and B
Answer:
C
Explanation:
How many inches are in 4 yards? ( 1 yard = 3 ft and 1 ft = 12 inches)
Answer:
There are 144 inches in 4 yards.
Hope this helps :)
Explanation:
Answer: 144
Explanation:
This chart shows characteristics of three different types of atoms.
A 3-column table with one row titled valence electrons in three types of atoms. The first column labeled Atom X has entry 6 valence electrons. The second column labeled Atom Y has entry 2 valence electrons. The third column labeled Atom Z has entry 8 valence electrons.
Which statement is best supported by the information in the chart?
Atom X will donate electrons to Atom Y.
Atom X will accept electrons from Atom Y.
Atom Y will accept electrons from Atom Z.
Atom Z will donate electrons to Atom X.
Answer is Atom X will accept electrons from Atom Y.
Atom X will accept electrons from Atom Y.
What is Chart?
The official 511 traveller information service for Maryland is CHART Web. Maryland 511 gives drivers dependable, up-to-date information about traffic, road closures, and weather-related traffic events and conditions.
When driving in Maryland, MD 511 assists drivers in getting to their destination in the safest and most effective way possible.
The term "chart" (sometimes referred to as "graph") refers to a graphical representation of data visualization in which "the data is represented by symbols, such as bars in a bar chart, lines in a line chart, or slices in a pie chart".
Therefore, Atom X will accept electrons from Atom Y.
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Plz help!
Covalent bonding is referred to as “sharing” electrons. Is it really sharing? Why or why not?
Answer:
yes
Explanation:
because they will bond in order to gain more stability which is gained by forming a full electron shell
which process do ribosomes perform
Select the correct answer from each drop-down menu.
Why do some transition metals have multiple oxidation states?
Transition metals have multiple oxidation states because of their (a. completely filled b. partially filled c. empty) (s, p, d, or f) sublevel.
Answer:
because of energy difference between (n1)d and ns orbitals (sub levels) and involvement of both orbital in bond formation
Explaination:
the reason is that there is a difference in energy of orbitals of an atom of transition metal, so there (n1)d orbitals and there ns orbitals both make a bond and for this purpose they lose an electron that is why both sublevels shows different oxidation state.
Hope this helped you
Transition metals have multiple oxidation states because of their partially filled orbitals . Thus option b is correct.
What are transition metals?Transition metals are defined as essentially, a configuration attended by reactants during complex formation, as well as the reaction coordinates.
It can also be defined as a very short-lived atomic configuration at a reaction-energy diagram's local energy maximum.
Transition metals are best defined as an element with a partially filled d sub-shell on its atom or that can give rise to cations with an incomplete d sub-shell.
Transition state is defined as a chemical reaction is defined as a certain configuration along the reaction coordinate.
Oxidation state is defined as the total number of electrons that have been deleted or added to an element.
It can also be defined as an atom's charge if all of its links to other atoms were entirely ionic.
Thus, transition metals have multiple oxidation states because of their partially filled orbitals . Thus option b is correct.
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in a hydraulic lift system, the output force is greater than the input force because
Answer:
In a hydraulic lift system, the output force is greater than the input force because the pressure acting on the output piston is greater than the pressure acting on the input piston.
Explanation:
What happens to the tape at the closer markers compared to the markers that are further away?
What would be the pH after mixing!!
Look for other families of ions in the table that follow a pattern similar to that of the polyatomic chlorine ions. Then complete the statement to describe what you find. Select the correct answer from each drop-down menu. Families of ions that contain hydrogen pattern similar to that of the polyatomic chlorine ions. then complete the statement to describe what you find
Answer: Families of ions that contain NITROGEN, SULFUR, and CARBON follow a pattern similar to that of the polyatomic chlorine ions.
Explanation: Plato
Answer:
Answer: Families of ions that contain NITROGEN, SULFUR, and CARBON follow a pattern similar to that of the polyatomic chlorine ions.
Explanation: Plato
Bonus question #2: Unknown element, Element X, exists in nature as two isotopes:
^{351}
351
X has a mass of 350.9196 u and
^{353}
353
X has a mass of 352.9209 u. The average atomic mass of Element X is 351.96 u. Calculate the relative abundance of the two Element X isotopes.
Answer:
Explanation:
your answer is 351.96 i not a 100 per sent right but that should be it
Science investigation skills