Answer:
CUT through the hardwater stains
Explanation:
The dependent variable in an experiment is the variable that the experimenter measures. It is the variable that responds to changes made to the independent variable.
In this experiment, Marie conducted an experiment to test which cleaner will do a better job of cutting through the stains (hard water buildup). She measures the cut through the stain, hence, the CUT is the dependent variable, which is dependent on the cleaner used.
005 10.0 points
Covalent bonds involve
1. electrostatic forces.
2. different charges.
3. a sharing of electrons.
4. a transfer of electrons.
Answer:
3. a sharing of electrons
Explanation:
A covalent bond consists of the mutual sharing of one or more pairs of electrons between two atoms. A covalent bond forms when the difference between the electronegativities of two atoms is too small for an electron transfer to occur to form ions. In other words, it does not involve ions.
Which statement best describes the organization of the periodic table of the elements
Answer:Elements within a period have the same number of electrons.
A 16 L sample of gas is under a pressure of 4.6 atm. What will be the pressure of the gas when the volume increases to 20 L? Assume the temperature is held constant.
Answer:
P₂ = 3.68 atm
Explanation:
Given data:
Initial volume of sample = 16 L
Initial pressure = 4.6 atm
Final pressure = ?
Final volume = 20 L
Solution:
The given problem will be solved through the Boly's law,
"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"
Mathematical expression:
P₁V₁ = P₂V₂
P₁ = Initial pressure
V₁ = initial volume
P₂ = final pressure
V₂ = final volume
Now we will put the values in formula,
P₁V₁ = P₂V₂
4.6 atm × 16 L = P₂ × 20 L
P₂ = 73.6 atm. L/ 20 L
P₂ = 3.68 atm
10^9, 10^3, and 10^1 represent what prefixes
Answer:
Common prefixes, i.e., 10
The model below shows a carbide ion. 8 light grey and 6 dark grey balls sit at the center with 2 concentric black rings around them. The inner ring has 2 medium grey balls on it, and the outer ring has 8 medium grey balls on it. At bottom, a dark grey ball = +1, a light grey ball = 0, a medium grey ball = negative 1.
Answer:
Explanation:
The question wants us to determine what could be done to change the carbide ion to a neutral carbon atom.
From the given information:
The dark grey ball has a +1 charge, which implies that the positive charge is the proton. Also, the light grey ball is denoted by 0 charge, which signifies that it is a neutron because a neutron usually has no charge, and its mass is equal to the mass of the proton.
Consequently, the -1 charge on the medium grey ball signifies that it is an electron.
In a neutral atom, the number of protons usually equal to the electron number. However, in as much as no overall charge is present from the model of the atom given. We can say that the atom is neutral.
Let also recall that the atomic number is the number of available protons present in the element's atomic nucleus.
Thus, in the given atom.
The total number of proton = 8
The total number of neutron = 9
The total number of electron = 8
Since atomic number relates to the number of protons, the atomic number is also = 8
Answer: C :)
remove 4 electrons
Explanation:
good luck
What defines our current ‘standard' for one meter? A The distance equal to 1/10,000,000 the distance between the Equator and North Pole b The length of a pendulum arm that takes 1 second to swing from left to right c The distance a 1 kilogram object travels in one second when acted on by a force of 1 newton d The distance light travels in a tiny fraction of a second
Answer:
The distance light travels in a tiny fraction of a second
Explanation:
One meter is defined as the length of the path travelled by light in a vacuum in [tex]\dfrac{1}{299 792 458}[/tex] of a second. It is also equal to the one [tex]\dfrac{1}{10}[/tex] of the distance from the equator to the North Pole. It is one of the fundamental units. It is a SI unit of length. So, the standard definition of 1 mete is the distance light travels in a tiny fraction of a second.
Hence, the correct option is (d).
Ethan filled 10 cups of the same size with equal amounts of water. He divided the cups into five groups of two cups each. The groups were placed in five different locations around his house. After two weeks, he measured the remaining water to determine how much had evaporated, by measuring how much water remained in each cup.
The question is incomplete, the complete question is;
Ethan filled 10 cups of the same size with equal amounts of water. He divided the cups into five groups of two cups each. The groups were placed in five different locations around his house. After two weeks, he measured the remaining water to determine how much had evaporated, by measuring how much water remained in each cup.
What is the dependent (data) variable?
A. Location of cups
B. Amount of time they were left in locations
C. Amount of evaporated water
D. Size of cups
Answer:
C. Amount of evaporated water
Explanation:
The dependent variable is the outcome that is measured or observed in an experiment. In this case, the variable that is being observed is the amount of water left in each cup.
Depending on its location, the amount of water in different locations may not be the same. Therefore, the amount of water left in each cup is regarded as the dependent variable here.
Why do we sweat more when we exercise rigorously?
Sweating helps you cool down and prevent you from overheating mark me brainliest plz
Explanation:
Which of the following is made of cells?
A. a rock
B. a snowflake
C. a raindrop
D. a leaf
Answer:
a snowflake
Explanation:
Snowflake Symmetry. All ice crystals (of ordinary 'Ice 1h' that is) have the same basic hexagonal symmetry. The fundamental building block is a unit cell containing four water molecules. Ice crystals can be thought of as made of untold stacks of these unit cells.
Plz help me with the blanks on balancing numbers-chemistry
Answer:
(NH4)2Cr2O7 → N2 + 4 H2O + Cr2O3
Hope this helps :)
Which equation is balanced
I need help ASAP
Answer:
2Mg+O2=2MgO
Atomic number of Mg and O is equal in both side
What is the best description of molecule b in this diagram?
Answer:
B. Adenosine diphosphate
Explanation:
You already have the right answer ^^
What is the definition of half-life
Answer:
the time taken for the radioactivity of a specified isotope to fall to half its original value.
Explanation:
what is the atomic number of helium
Answer:
2
Explanation:
Its atomic number is 2, so it has two protons in its nucleus.
Answer:
2
Explanation:
The atomic number for helium is 2.
Which element is the MOST stable based on its electron configuration?
A
fluorine
B
sulfur
C
sodium
D
argon
Answer:
A. fluorine
Explanation:
hope this helps
have a good day
stay safe byee
The element that is most stable based on its electron configuration is argon. The correct option is D.
What is electronic configuration?The electron configuration of any atom or molecule in atomic or molecular orbitals is renowned in atomic physics and quantum chemistry.
Noble gases have a stable ns2np6 configuration with their octet completely filled, giving them stability. There is one exception: helium.
The electron configuration is commonly used to describe an atom's orbitals in its ground state, but it can also be used to represent an atom that has ionized into a cation or anion by compensating for electron loss or gain in subsequent orbitals.
8A Group Noble and inert gases The noble gases of Group 8A (or VIIIA) of the periodic table are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).
Thus, the correct option is D.
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The proteins in the cell membrane allow substances to come or go based on their concentrations. This is an important part of _____ which maintains the immediate conditions necessary for life.
a. osmosis
b. metabolism
c. homeostasis
d. endocytosis
Answer:
C. Homeostasis
Explanation:
Occurs when a new organism is formed from the same organism
A. Cellular asexual Reproduction
B. Regeneration
C. Budding
Answer:
C) Budding
Explanation:
Budding is define as when a new organism is formed from the same organism is known as Budding
Consider a balloon that has a volume V. It contains n moles of gas, it has an internal pressure of P, and its temperature is T. If the balloon is heated to a temperature of 15.5T while it is placed under a high pressure of 15.5P, how does the volume of the balloon change? It doubles. It stays the same. It increases greatly. It decreases slightly.
Answer:
It stays the same
Explanation:
From the gas law:
P1V1/T1 = P2V2/T2
P1 = P, V1 = V, T1 = T and P2 = 15.5P, V2 = ? , T2 = 15.5T
Substituting the various variables into the gas law equation:
PV/T = 15.5PV2/15.5T
Make V2 the subject of the formula:
V2 = 15.5TPV/15.5PT
V2 = V.
V1 = V and V2 = V, hence, the volume of the balloon stays the same.
Answer:
It stays the same
Explanation:
Edge 2020
Help me label the words please thank you
Answer:crust, outer core, inner core, mantle
Explanation:
2.
State the purpose of physical and chemical properties
.
Answer: chemical
Explanation: Chemical changes and physical changes keep it the same.
What did you include in your response? Check all that apply. t represents time, which is the input of the function. h(t) represents the altitude, which is the output of the function. After 10 minutes, the hot air balloon is at 60 feet.
Answer:
t represents time, which is the input of the function.
h(t) represents the altitude, which is the output of the function.
After 10 minutes, the hot air balloon is at 60 feet.
Explanation:
Given the function; h(t) = 210 - 15t models the altitude of a hot air balloon over time t, in minutes.
It follows that;
t represents time, which is the input of the function.
h(t) represents the altitude, which is the output of the function.
To obtain h(10), we have;
h(10) = 210 - 15(10)
h(10) = 60 feet
What is the volume of a solution that has a specific gravity of 1.2 and a mass of 185 g?
ANSWER FAST! MARKING BRAINLIEST!
This system insulates and protects earth and its lifeforms by trapping thermal energy from the sun that bounces back from earths surface
A- Atmosphere
B- Hydrosphere
C- Geosphere
The answer is B hydro sphere
Question 1 (5 points)
In the image below, if the frisbee represents light, what does the fence represent?
Answer: a vacuum
Explanation: light travel as a wave but unlike sound waves or water it doesn’t need any matter or material to carry its energy along.this means that light can travel through a vacuum which means a completely airless space the wall is vacuum :) hope this helped
What is the charge of the atom
The overall charge of an atom is zero.
Atoms are made up of positively charged particles called protons and negatively charged particles called electrons as well as non-charged particles called neutrons.
A Lewis dot diagram
a.will always have a maximum of eight electrons.
b.contains only valence electrons.
c.represents the number of neutrons in that particular isotope.
d.none of the above.
Answer:
b. contains only valence electrons.
Explanation:
In Lewis dot diagram valence electrons are shown by the dots around the symbol of an atom. Consider the example of sodium fluoride.
Electron dot diagram is attached below.
Sodium is alkali metal and present in group one. It has one valence electron. All alkali metal form salt when react with halogens.
Sodium loses its one electron to get stable. While all halogens have seven valence electrons they need only one electron to get stable electronic configuration.
When alkali metals such as sodium react with halogen fluorine it loses its one valence electron which is accepted by fluorine and ionic bond is formed. The compound formed is called sodium fluoride.
Na + F → NaF
How far is the Moon from Earth? Where will it be relative to its current location 100 years from now?
The moon is 150 inches far from the earth to its current location 100 years from now.
What is earth ?Only one celestial object, Earth, which is third from the Sun, is known to support life. Although the Solar System contains enormous amounts of water, only Earth is home to liquid surface water. The oceans cover around 71% of Earth's surface, dwarfing its lakes, rivers, and polar ice.
Because Earth was never an unknown entity to mankind, it was never properly "discovered." Its shared status as a "planet" with other bodies, nevertheless, was just recently discovered.
The moon travels around 251,000 miles from Earth during its apogee, or farthest point from our planet. Solar eclipses that have an annular shape, or a "ring of fire," are among the best examples of apogee in nature.
Thus, the moon is 150 inches far from the earth to its current location 100 years from now.
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Carla is making two drinks. She is making one hot chocolate and one chocolate milk. Which best describes the agitation needed to make sure the cocoa powder is mixed in well? Chocolate milk would require more agitation than hot chocolate does. Hot chocolate would require more agitation than chocolate milk does. They would both require the same agitation. Neither would require any agitation.
Chocolate milk would require more agitation that hot chocolate dose.
Answer:
a
Explanation:
Which statement about the quantum mechanical solution for the hydrogen atom is incorrect?
A) the angular momentum quantum number l = 1 corresponds to the d sub shell
B) theoretically the n quantum number can go to infinity
C) the ms quantum number is always a fraction
D) the ml quantum number can have a positive or negative value
Answer:
A) the angular momentum quantum number l = 1 corresponds to the d sub shell
Explanation:
The values of the subsidiary, azimuthal or orbital quantum number l are 0,1,2,3 corresponding to s, p, d,f.
This implies that;
when l= 0 we have the s subshell
when l=1 we have the p subshell
when l= 2 we have the d subshell
when we have l=3 we have the f subshell
We can clearly see from this analysis above that option A is wrong.
Look at the pic below. click on the location of the ATOMIC NUMBER
16
S
sulfur
32.065
^
this is tha pic