All you have to do is multiply 68 miles and 3.2 hours. It will give you the answer, 217.6 mph.
68x3.2=217.6 miles per hour.
Mole Conversion: how many moles are in 1.78 x 10^22 atoms of potassium
Answer:
Explanation:
This can most easily be done by using a proportional equation.
1 mol = 6.02 * 10^23 atoms
x mol = 1.78 * 10^22 atoms
1/x = 6.02 *10^23 / 1.78 * 10^22 Cross Multiply
1 * 1.78 * 10^22 = 6.02 * 10^23 x
x = 1.78 * 10^22 / 6.02 * 10^23
x = 0.029568 mols
This really ought to be 0.0296 mols
Can someone help me
Answer:
the moon and sun
Explanation:
Answer:
3rd option
Explanation:
What did Asoka do for convicted murderers?
Answer: He provided a 3 time period where there families appeal to there conviction.
you can estimate the degree to which bond between two atoms is ionic or cavelent by calculating the?
Answer:
difference in the atoms' electronegativites
Explanation:
hope this helps <333
How many total valence electrons are available for the Lewis Dot structure of H2S?
Answer:
8 Valence Electrons
Explanation:
There are 2 atoms of Hydrogen and 1 atom of Sulfur in the compound. Each Hydrogen atom has 1 electron (which is the valence electron).Sulfur has six valence electrons. Therefore, there is a total of eight valence electrons in H2S.How could you improve the accuracy of your measurements?
Explanation:
Accuracy is the nearness of observed values or measured values to the true value.
The difference between the measured and observed value gives the error incurred during the experimental procedure.
Here are some ways to improve the accuracy of measurements;
Use the right instrument to make recordings and to take measurements. Employ the right hands and improve your technical knowledge. Be very careful and observant while making measurement. Ensure the instruments are properly calibrated. Make sure the experiment follows the right design.How many moles are in 12 grams of NH3?
Answer:
molecular weight of NH3 or grams This compound is also known as Ammonia. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles NH3, or 17.03052 grams.
No. of moles present in 12 grams of NH₃ are 0.705 moles.
What is Avogadro’s number?
Avogadro's number is the number of units in one mole of any substance and equals to 6.02214076 × 10²³. The units can be electrons, atoms, ions, or molecules.
No. of moles is defined as a particular no. of particles that we can calculate with the help of Avogadro’s number.
Given,
Mass of NH₃ = 12g
one mole of any substance = 6.02214076 × 10²³
Molar mass NH₃ = 17g
17g NH₃ has = 1 mole
1g NH₃ has = (1÷17) moles
12g NH₃ has = 0.058 × 12 moles = 0.705 moles
Therefore, No. of moles present in 12 grams of NH₃ are 0.705 moles.
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Can somebody plz help answer all these true and false questions CORRECT!!
WILL MARK BRAINLIEST :D
Answer:
1-T
2-F
3-T
4-T
Explanation:
big brain
The equation for the synthesis of ammonia is below. How many moles of H 2 are
needed to produce 9.33 moles of NH3?
EQUATION: N2 + H2 = NH3
Answer:
Using the proportions of the amount of the molecules, we can convert from any reagent or product to any other reagent or product. In the context of this reaction, for every mole of N2 and every 3 moles of H2 we obtain 2 moles of NH3.
Explanation:
Hydrogen is the limiting reactant. In other words, Hydrogen will run out before Nitrogen because it takes 3 mole of H2 and just 1 mole of N2 to make 2 mole NH3. What is the greatest amount of MgO (in moles) that can be made with 7.8 moles of Mg and 4.7 moles of
One of the scientists interviewed for the article said, "Almost certainly this
effect has already ended." If he is correct, what evidence would you expect to
see to support his statement?
Answer:
The scientist is referring to the unusually slow growth rate of carbon dioxide occurring recently. As that slow growth rate ends, the rate of increase of carbon dioxide in the atmosphere should go up soon.
Explanation:This is the exact answer so switch it up.
Why is an ecosystem still healthy although there's still a lot of consumers in it?
Answer:
because it is a sign that there are more producers for the consumers.
Explanation:
An ecosystem consist of the abiotic or inorganic components, the animals[consumers], the plants[producers] and the decomposers. An ecosystem simply means the environment of organisms that are living together and the way these organisms interact with another.
The producers that is the plants are the ones manufacturing food by themselves either by photosynthesis or chemosynthesis and the consumers are the ones relying on the producers for food.
The ecosystem is still healthy even when there's still a lot of consumers in it because it shows that there are come producers that is to say the producers are more also. If this is not the case, then the ecosystem will not be healthy as the consumers will eat the producers until the producers will not be enough.
Ammonification is the formation of
n element has FOUR known isotopes with the following atomic masses and percentage of occurrence: 47.688 amu; 15.778% 44.000 amu; 39.687% 43.557 amu; 24.500% 42.609 amu; 20.035% What is the average atomic mass of this element? Group of answer choices
What is an atomic nucleus?
Answer:
The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom, discovered in 1911 by Ernest Rutherford based on the 1909 Geiger–Marsden gold foil experiment. ... Protons and neutrons are bound together to form a nucleus by the nuclear force.
Explanation:
Answer:
The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom
Explanation:
My question is on the image
Answer:
Top left: RR Top right: Rr Bottom left: Rr Bottom right: rr
Explanation:
if both parents are heterozygous then the table will always look like this. the chances of the offspring being heterozygous are 50%. the offspring has a 25% chance of having two recessive traits and a 25% chance of having two dominant traits.
Can somebody plz help answer this short question in only 2-3 sentences..thanks :)
WILL MARK BRAINLIEST WHOEVER ANSWERSS FIRST!
Answer:
Here you go!
Explanation:
Electrons spin around the nucleus in shells. The protons and electrons of an atom are attracted to each other. They both carry an electrical charge.
Answer:
“Atoms are made up of smaller elements, called protons, electrons and neutrons. When electrical and magnetic forces move electrons from one atom to another, an electrical current is formed.”
Hopefully this helps you
What makes a submarine dive?
pumping air into its tanks to increase its density
pumping air into its tanks to decrease its density
adding water to its tanks to increase its density
Answer:
The answer to your question is C. Adding water to its tanks to increase its density.
Explanation:
Have a wonderful day! Sorry if I am wrong but I believe this is correct. Good luck! Plz follow me! Bye!
What are all synthetic materials made from?
Answer:
Natural resources
Explanation:
How can convection in the mantle affect the positions of Earth's continents?
Answer:
Scientists believe that convection circulation within the mantle helps continents to move. As heat from Earth's innermost layer—the core—transfers to the bottom layer of mantle rock, the rock warms, softens, and rises upward. ... This churning motion in the mantle appears to be a major factor in plate movement.
Explanation:
ANSWER FOR BRAINLYEST
If an atom has a mass number of 52 and has 28 neutrons, what is the atomic number?
Answer:
24
Explanation:
52-28=24
What is the difference between kinetic energy and
potential energy?
А
Potential energy is the energy of objects at rest; kinetic
energy is the energy of objects in motion.
B
Kinetic energy is the energy of objects at rest; potential
energy is the energy of objects in motion.
C
Potential energy has to do with chemistry; kinetic energy
has to do with physics.
D
Kinetic energy has to do with chemistry; potential
energy has to do with physics.
the answer is A: Potential energy is the energy of objects at rest; kinetic
energy is the energy of objects in motion.
Answer:
A
Explanation:
Which of the following is an element?
A
MgBr
B
HCl
C
O
D
Cu(SO4)3
Oxygen is a chemical element with symbol O and atomic number 8. Classified as a nonmetal, Oxygen is a gas at room temperature.
Please answer I need this to get a good grade. (;
Answer:
94.74 mol NO₂
General Formulas and Concepts:
Chemistry - Stoichiometry
Using Dimensional AnalysisSTP (Standard Conditions for Temperature and Pressure) = 22.4 L per mole at 1 atm, 273 KExplanation:
Step 1: Define
3714 L O₂ at STP
Step 2: Identify Conversions
RxN: 7 mol O₂ = 4 mol NO₂
STP: 22.4 L = 1 mol
Step 3: Stoichiometry
[tex]3714 \ L \ O_2(\frac{1 \ mol \ O_2}{22.4 \ L \ O_2} )(\frac{4 \ mol \ NO_2}{7 \ mol \ O_2} )[/tex] = 94.7449 mol NO₂
Step 4: Check
We are given 4 sig figs. Follow sig fig rules and round.
94.7449 mol NO₂ ≈ 94.74 mol NO₂
An _______________________ cannot be broken down into any other substance.
element
compound
mixture
solution
Answer:
Solution
Explanation:
Solution
Answer:
Element
Explanation:
An Element cannot be broken down into any other substance or anything smaller. A Element is the Smallest Known Substance in the World.
According to Webster's Dictionary states "Each of more than one hundred substances that cannot be chemically interconverted or broken down into simpler substances and are primary constituents of matter. Each element is distinguished by its atomic number, i.e. the number of protons in the nuclei of its atoms."
What is kinetic energy related to?
Answer:
Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: K.E. = 1/2 m v2.
Explanation:
i looked it up
Answer:
Kinetic energy, form of energy that an object or a particle has by reason of its motion. If work, which transfers energy, is done on an object by applying a net force, the object speeds up and thereby gains kinetic energy
Explanation: PRESS THE CROWN
Which statement is true of a
simple machine?
A. Simple machines are used to create friction.
B. Simple machines have many moving parts.
C. Simple machines are very basic and make
work easier.
D. Simple machines are always electrical.
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simple machines
A machine is a physical system that use power to exert forces, regulate movement, and carry out an activity. Simple machines are very basic and make work easier. This statement is true about simple machine. Therefore, option C is correct.
What is machine ?A machine is a physical system that use power to exert forces, regulate movement, and carry out an activity. The phrase is frequently used to describe both natural biological macromolecules, such as molecular machines, and man-made devices, such as those using engines or motors.
Any tool that simplifies work by adjusting a force is a machine. Every time a force pushes an item over a distance, work is done. Work = Force x Distance is an equation that measures the amount of work that is completed. You exert force on a machine when you operate it.
Simple machines are often used to lift big items with a pulley, to ride a bicycle, or to cut with a pair of scissors. It should be noted that a machine cannot be both a force multiplier and a speed multiplier.
Thus, option C is correct.
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0.33 g of hydrosulfuric acid, H25, is added to 50.0 mL of water. What is the concentration (molarity) of [H301 of this solution?
H25 --> 2H +52
2H+ + 2 H20 --> 2 H30* + 2 OH
[Do not include units in your answer]
The concentration (molarity) of [H₃O⁺]=0.776 M
Further explanationWe balance the reaction first so that the number of atoms and the charge of the product and reactant are the same
Reaction(balanced) :
H₂S⇒2H⁺+S²⁻ (eq 1)
2H⁺+6H₂O⇒4H₃O⁺+2OH⁻ (eq 2)
mass of H₂S=0.33 g
mol H₂S (MW=34 g/mol) :
[tex]\tt mol=\dfrac{0.33}{34}=0.0097[/tex]
From equation 1, mol H⁺ = 2 x mol H₂S , so mol H⁺ =
[tex]\tt 2\times 0.0097=0.0194[/tex]
From equation 2, mol H₃O⁺ = 2 x mol H⁺(4 : 2) , so mol H₃O⁺ :
[tex]\tt 2\times 0.0194=0.0388[/tex]
Or simply mol H₃O⁺ = 4 x mol H₂S = 4 x 0.0097 = 0.0388
the molarity of [H₃O⁺] =
[tex]\tt M=\dfrac{n}{V}=\dfrac{0.0388}{0.05~L(50~ml)}=0.776[/tex]
The density of ethanol is 0.789 g/mL. Find the mass of a sample of ethanol that has a volume of 150.0 mL
Answer:
The mole is a key unit in chemistry. The molar mass of a substance, in grams, is numerically equal to one atom’s or molecule’s mass in atomic mass units.
Explanation:
I, m right?
50 points in total i believe!
Why does chocolate melt when it gets warm?
Answer:
Because it is made of a hardened liquid that is extremely sensitive to heat
Explanation:
Brainliest?
