In order to determine the mole ratio, you need to begin with a balanced chemical equation.
Steve left for a fishing trip at 11:00. He
made the 40 mile trip in 1 hour. He takes
30 minutes gathering his lunch, rod and
reel and 30 more at the lake. Steve then
drives back home in 45 minutes.
Answer:
Ne gets home at 1:45.
Explanation:
It’s 11:00. He takes 1 hour to make the 40 mile trip. It’s 12:00. He takes 60 minutes to gather lunch, rod and reel, and at the lake. It’s 1:00. He takes 45 minutes to get home. It’s 1:45.
I hope this helped and please mark me as brainliest!
What scientific tool would be the most helpful when measuring the temperature of a substance that is undergoing a phase change? a spectrophotometer a thermometer the periodic table a scale.
The scientific tool that measures the change in the temperature during a phase change is a thermometer. Thus, option B is correct.
The scientific tools are the instruments that are used for the analysis and the measurement in scientific studies.
Which instrument do measures change in temperature?The temperature is the degree of hotness and coolness for a substance. The transfer of energy results in the change in temperature between the surroundings and the substance.
The phase change is demonstrated with the change in energy between the sample and the environment. The tool that is used to measure temperature is a thermometer. Thus, option B is correct.
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Answer: B (thermometer)
Explanation: hope this helps!
How many protons and electrons does oxygen have? What about hydrogen? Draw a model of each atom if that helps you think about the differences between them ?
Answer:
Two electrons fit in the first shell out from the nucleus and eight fit in the second. Every element with more protons than the two of Helium needs to work on shells outside the first one. one you get to ten, you have filled the first two shells.
In a water molecule, oxygen forms one covalent bond with EACH of TWO hydrogen atoms. As a result, the oxygen atom has a stable arrangement of 8 valence electrons. Each hydrogen atom forms only one bond because it needs only two electrons to be stable.
The first electron shell of an atom is complete when it has ___ electrons and the second electron shell is complete when it has ___ electrons and the third electron shell is complete when it has ___ electrons The fir Group of answer choices 2, 4 ,6 4, 8, 20 2, 6, 18 8, 2, 32 2, 8, 18
Answer:
2, 8, 8
Explanation:
The first electron shell always has 2 electrons when it is complete. The second electron shell and 3rd shell can hold 8 when completed.
An area in the desert where water is found is known as an.
Answer:
Oasis
Explanation:
An area in the desert that has water in it is called an oasis.
how many unbonded pairs of electrons are found on the alanine molecule
Answer:
I'm hoping this helps!! it's on quizzes if you're wondering
Why does potassium permanganate need to be standardized right before a titration?.
Describe and explain the trend in atomic a.radius within the group.Explain the difference between the size of b.the atoms and the size of the ions.
Answer:
A. The atomic radius increases (in a group) with the increasing atomic number. This is because atomic size generally increases from top to bottom within a group because the greater the number of protons means the greater amount of electrons. The amount of electrons in orbitals determine an atom's size/radius.
B. Since Group 1A (Alkali Metals) are metals, they tend to form cations. Cations are always smaller than their original atom because the greater positive charge from the nucleus closes in the space between it and the electrons, thus "shrinking" its size. This is why the ionic radii are smaller than the atomic radii of the same element.
I hoped this helped <3
Explanation:
What type of chemical bond involves the sharing of a pair of electrons by two atoms in a molecule.
Answer:
Covalent bond.
Explanation:
There are two kinds of chemical bonds: covalent bonds and ionic bonds.
A covalent bond is formed when two atoms share a pair of electrons (two electrons for each bond.)Ions are formed when one atom transfers an electron to another. Ionic bonds refer to the attraction between ions of opposite electric charges.In this example, since the atoms are sharing atoms, the chemical bond between them would be a covalent bond.
when dynamite explodes, it releases a large amount of light and heat. this is an example of _____.
Answer:
Exothermic reaction
Explanation:
8
in the respiratory system
a.
bronchodilatation
b.
inspiration and expiration
is most affected by rib damage
C.
humidification of the air
d.
movement of mucus from lungs
Answer:8
in the respiratory system
a.
Explanation:
Draw the electron dot structure for the hydrogen carbonate ion hco3-. Carbon is the central atom, and hydrogen is attached to oxygen in this polyatomic anion.
Explanation:
this is your answer hope it will help you
Why is it impossible for a solution to become both more basic and more acidic at the same time?
A. An increase in H+ concentration will decrease OH- concentration.
B. H+ and OH- ions cannot exist in the same solution.
C. H+ and OH- react to form water (H2O).
D. Acids only release hydrogen ions in the presence of bases.
An increase in H+ concentration will decrease OH- concentration is the
reason why it's impossible.
What is an Acidic and Basic compound?An acidic compound has the presence of H+ ions in them while basic
compounds have the presence of OH- ions.
In a solution , as the number of Hydrogen ions increases, it leds to a
corresponding decrease in the Hydroxide ions which is the reason why
they can't coexist at the same time.
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A solution cannot be both acidic and basic at the same time because an increase in the H+ concentration will lead to a decrease in OH- concentration in the same solution.
What is pH?pH is the degree of acidity or alkalinity of a solution.
pH = -log [H+]
Also
pOH = -log [OH-]
Mathematically, pH + pOH = 14
Thus, for a given solution, as the pH increases, pOH decreases, and vice versa.
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What are the functions of nervous system
Answer:
Your nervous system is your body's command center. Originating from your brain, it controls your movements, thoughts and automatic responses to the world around you. It also controls other body systems and processes, such as digestion and breathing.
how many moles in 56 grams of iron
Answer:
The molar mass of iron is equal to 56 grams per mole. Therefore, 1 mole of iron will weigh 56 grams. This implies that 0.8 grams of iron will feature 0.8/56 moles or 0.014 moles of iron totally.
Answer:
1 mole of iron will weigh 56 grams.
Explanation:
have wonderful day o(*°▽°*)o
How many moles of xenon trioxide are present in 1. 69 grams of this compound.
Answer:
0.00944
Explanation:
Xenon mass number on the periodic table: 131.29
Oxygen mass number: 16.00
Add them to find the molar mass of xenon trioxide: 131.29+3(16) = 179.29g/mol
Convert this to moles
[tex]1.69g * \frac{mol}{179.29g} = 0.00944mol[/tex]
Silver (ag) has a molar mass of 107. 8682 g, nitrogen has a molar mass of 14. 0067 g, and oxygen has a molar mass of 15. 9994 g. What is the molar mass of silver nitrate, agno3?.
Answer:
M(AgNO3) = 169,8731 g mol
Explanation:
M(Ag) = 107,8682 g mol
M(N) = 14.0067 g mol
M(O) = 15.9994 g mol
M(AgNO3) = M(Ag) + M(N) + 3 x M(O) = 107.8682 + 14.0067 + 3 x 15.9994 =
= 169,8731 g mol
Just sum up all the respective elements' molar mass.
how many times greater is the rate of effusion of oxygen gas than that of carbon dioxide
1.173
hope u get 100%!!
if you are rationed to 32 gills of fresh water a day. how many liters is this?
Answer:
3.8 LITERS
Explanation:
Which process causes minerals to become concentrated in certain areas.
Answer: Volcanic activity.
Explanation:
Since sodium chloride is classified as a compound, a sample of it contains:.
What does the dropping liquid create
Which element would you find in group 2 that has 3 electron shells?
calcium
strontium
magnesium
aluminum
Magnesium
First shell has 2
Second has 8
Third has 2
Which impact is the greatest negative of a new hydroelectric dam?.
The negative impact of the hydroelectric dam is local drought and massive flood by dam breakage.
The hydroelectric dam is the local water storage body that is used to convert the energy of the water to electrical energy. The plants are a huge source of electricity.
What is the dam's negative impact?The dam is prepared in order to collect the local water in the bodies for the production of electricity. The collection of water required a larger force and pressure-bearing ability, thus dams are constructed with high-quality material.
The dams provide hydroelectricity, but the collection of water has been caused by the local drought conditions in the area. The dam breakage leads to massive floods as well.
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Suppose that two hydroxides, MOH and
M′(OH)2, both have a Ksp of 2.15 × 10−12
and that initially both cations are present in
a solution at concentrations of 0.001 mol/L.
At what pH will the hydroxide precipitate
when solid NaOH is added to the solution?
This problem is providing us with the solubility product of two hydroxides, which can be used to calculate the pH at which they will precipitate. At the end, the answer turns out to be 9.67.
Solubility product:In chemistry, we use solubility products in order to quantify the amount of precipitate a solid will be leftover after dissolving it. Thus, we can just write the equilibrium expressions and solve for x, molar solubility, for each hydroxide as follows:
[tex]Ksp=[M^+][OH ^-]\\\\2.15x10^{-12}=(0.001+x)(x)\\\\x=2.15x10 ^{-9}M\\\\Ksp=[M^2^+][OH ^-]^2\\\\2.15x10^{-12}=(0.001+x)(x)^2\\\\x=4.535x10 ^{-5}M\\\\[/tex]
Then, since both x's contribute to the concentration of hydroxide ions, but just the second one is predominant, we add them together to get the total:
[tex][OH^-]=4.535x10^{-5}M+2.15x10^{-9}M=4.535x10^{-5}M[/tex]
Finally, we calculate the pOH and pH with:
[tex]pOH=-log(4.535x10^{-5})=4.343\\\\pH=14-pOH=9.67[/tex]
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Imprints of the shells of ocean clams are often found in the rocks of the Appalachian Mountains. What do these imprint fossils MOST likely indicate?
O A. These mountains were once under the ocean.
OB. These mountains once had a more rainy climate.
OC. Mountain river clams evolved from ocean clams,
OD. Ocean clams evolved from mountain river clams.
Sound waves are what type of waves?
longitudinal wave.... is the right answer
# Good morningConsider the chemical equation in equilibrium. 2H2(g) O2(g) Double headed arrow. 2H2O(g) What will happen if the pressure of the system is increased? The reaction will not change. The reverse reaction will be favored. The reaction will stop completely. The forward reaction will be favored.
The increase in pressure of the system results in the reverse reaction. Thus, option C is correct.
The balanced chemical equation for the reaction is given as:
[tex]\rm 2\;H_2\;+\;O_2\;\leftrightharpoons \;2\;H_2O[/tex]
The pressure is the force applied by the molecules in the mixture and to the wall of the container. The increase in the pressure results in the increased collision of the molecules.
The increase in collisions results in the degradation of the product molecules. Thus, the reaction will process towards the left in the reverse direction
The increase in pressure of the system results in the reverse reaction. Thus, option C is correct.
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Answer: Its not C!!!
Explanation:
Does the entropy of the surroundings increase for spontaneous processes?.
From the statement of the second law of thermodynamics, the entropy of the surroundings increases for spontaneous processes.
What is the second law of thermodynamics?According to the second law of thermodynamics, we know that the entropy of surroundings or the universe would always increase in a sponteanous process.
Having said this, it is natural fall out of the law stated above that the entropy of the surroundings increases for spontaneous processes.
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which function is xylem specifically adapted to perform in plants?
Answer:
transports water froom roots to the rest of the plant
Explanation:
