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Potassium (K) is a soft, silver, solid metal. It is widely found in food we eat.
11
Na
22.990
Sodium
19
K
39.098
Potassium
37
Rb
85.488
Rubidium
Which statement correctly and accurately describes atoms of Rubidium?
Answer:
What is all that stuff
Explanation:
2. If a person in a wheelchair wanted to get to the second story of a two-story building, would it be easier to
take a short, steep ramp or a long, shallow ramp? Explain.
Answer:
The short steep ramp would be much harder because you will have to work more against gravity.
Explanation:
The long shallow ramp would be easier to take than the short, steep ramp because the person would have to use more force on the short, steep ramp to push the wheelchair against the force of gravity.
What is an inclined plane?An inclined plane or a ramp can be defined as a flat supporting surface tilted at an angle, with one end higher than the other, utilized as an aid for raising or lowering a load.
The inclined plane can be defined as one of the six classical simple machines developed by Renaissance scientists. Inclined planes can be utilized to move heavy loads over vertical obstacles.
Moving a body up an inclined plane needs less force than lifting it straight up, at a cost of an increase in the distance moved. The mechanical advantage, the factor by which the force is decreased, is equal to the ratio of the sloped surface's length to the height it spans.
The inclined plane provides the same amount of work to be done with a smaller force exerted over a greater distance. The angle of friction or the angle of repose can be defined as the maximum angle at which a load can rest motionless on an inclined plane because of the friction without sliding down.
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Do you believe that in 2020 every single American, regardless of race, sex, or income level, has an equal opportunity to achieve his/her American Dream? Why or why not?
Answer:
Tbh i rlly dont think that many will. Most may succeed in doing so. But i mean come on its 2020 anything can happen.
Explanation:
Answer:
yes 100% what reasons r there to not tho
Explanation:
AgF (aq) + KNO3 (aq) →
Answer:
AgF (aq) + KNO₃ (aq) → AgNO₃(aq) + KF(aq)
Explanation:
AgF (aq) + KNO₃ (aq) →
The products from the equation above can be obtained as follow:
1. AgF and KNO₃ will dissociate in solution as shown below:
AgF (aq) —> Ag⁺(aq) + F¯(aq)
KNO₃ (aq) → K⁺(aq) + NO₃¯(aq)
2. A double displacement reaction will occur between AgF and KNO₃ as illustrated below:
AgF (aq) + KNO₃ (aq) →
Ag⁺(aq) + F¯(aq) + K⁺(aq) + NO₃¯(aq) → Ag⁺NO₃¯(aq) + K⁺F¯(aq)
AgF (aq) + KNO₃ (aq) → AgNO₃(aq) + KF(aq)
A careful observation of the above equation shows that the equation is balanced.
how many atoms does Mg(NO3)2 have thanks
Answer: Magnesium nitrate compound contains one atom for magnesium, two atoms for nitrogen, and six atoms for oxygen.
CREDIT safsaf
What is the process by which new oceanic crust is added?
A Seafloor Spreading
B) Earthquakes
C) Trenches
D) Plate Tectonics
Answer: A
Explanation:
Answer:
A.Seafloor spreading
Explanation:
Match the vocabulary words with the correct definitions.
1.
equation
domain
3.
the variable representing the second elements of the
ordered pairs in a function; the outputs
2. the independent value, or x value
a relation where for any given input value there is only one
output value
the variable representing the first elements of the ordered
4.
pairs in a function; the inputs
a mathematical statement that shows two expressions are
5.
equal; has an equal sign
dependent variable
independent variable
function
Answer:
5 and 2 I think.
Explanation:
[tex]\\ \\[/tex]HOPE THIS HELPS!!Answer:
i just wanted to say that the other person really did not help
Explanation:
Which of the following is the end product of a natural
radioactive series?
Answer:
Lead
Explanation:
Lead (Pb) is the end product of every natural radioactive series.
Which cell organelle controls the activities for the cell?
Answer:
[tex]the \: nucleus \:[/tex]
Explanation:
[tex]the \: nucleus \: is \: organelle \: that \: controls \\ \:a ll \: cellular \: activities.[/tex]
Hydrochloric acid is a strong acid and carbonic acid is a weak acid. Yet 1 L of 1 M HCl solution will neutralize 1 mole of NaOH and 1 M of carbonic acid will neutralize 2 moles of NaOH. Explain.
Answer:
A mixture of a weak acid and its conjugate base is called a buffer solution, or a buffer. Buffer solutions resist a change in pH when small amounts of a strong acid or a strong base are added.
I hope this helps :D
What satement is true the about atomic mass?
Answer:
Explanation:
A. It can be greater than the atomic number
Which of the following d shell configurations is likely to be the best magnet?
Answer:
D10 is answer
Explanation:
Magnetism can result from unpaired electrons in a given ion of an element, depending on the spin states of the electrons and d10 is fully filled
The d 10 is the d shell configurations which is most likely to be the best magnet.
What are configurations?Configurations are defined as the way that parts are joined together to form the computer system. The arrangement of electrons scattered throughout the orbital shells and subshells is depicted by the electron configuration of an atom. Divide the periodic table into pieces to represent the atomic orbitals, the areas where electrons are stored, in order to determine an electron configuration. The s-block is represented by groups one and two, the d-block by groups three through twelve, the p-block by groups thirteen to eighteen, and the f-block by the bottom two rows.
Depending on the spin states of the electrons and whether or not d10 is completely filled, magnetism can emerge from unpaired electrons in a specific ion of an element.
Thus, the d 10 is the d shell configurations which is most likely to be the best magnet.
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The metric unit of force is the Newton (N) , which is kg⋅m/s2 .
Convert 10 kg⋅cm/s2 to Newtons.
OPTIONS:
A. 1×10−1 N
B. 1×10−2 N
C. 1×10−5 N
D. 1×10−6 N
Answer:
1×10^-1 N
I took the quiz
Answer:
A
Explanation:
I just took the test.
3. Students were measuring distances and found one to be 2.04 m. When they asked the teacher if their measurement was correct, the teacher said, “Actually, it is 2.16 m.” What is the percent error?
Answer:
5.56
Explanation:
(fill the blank)
The sex cells produced through meiosis each have ___.
A. half of the chromosome pairs from the original cell
B. a single chromosome from the original cell
C. pairs of chromosomes identical to the original cell
D. one chromosome from each pair in the original cell
Answer: A (Half of the chromosome pairs from the original cell
Explanation:
What is a hypothesis?
O proof and evidence of a scientific fact
O a question about nature and how it works
a series of steps to carry out an experiment
O a possible explanation of or answer to a scientific question
Answer:
The 4th option
a possible explanation of or answer to a scientific question
Explanation:
Answer:
A hypothesis is a question about naturre and how it works
How many atoks are in each element sampke? 16.5 g Sr, 26.5 g Fe, 7.73 g Bi, 36.4 g P
Answer:
16.5gm of Sr(strontium) has 1.12 x10^23 atoms...26.5 gm of Fe(iron) has 2.84 x10^23.... 7.73 gm of Bismuth has 2.22 x10^22.....36.4gm of Phosphorus has 7.06 x10^23
Explanation:
by the formula,
Moles=[tex]\frac{no of atoms}{Avogadro's No}[/tex]
you could find moles by
Moles = given mass/atomic mass
Put the value of moles and multiply it by Avogadro's no you will get the following answers
pleaseee help ASAP
will mark brainliest!!! <3
Answer:
it is C
Explanation:
I saw from Google. Hope it helps.
I cant get the full picture
sorry
Which of the following pairs of elements belong to the same period?
Answer:
He and Ar
Explanation:
A. Lithium and cadmium are in the mixture. Strontium is not in the mixture.B. Lithium and strontium are in the mixture. Cadmium is not in the mixture.C. Cadmium and strontium are in the mixture. Lithium is not in the mixture.D. All of the shown elements are present in the mixture.
Answer:
I think it's Sr and Li...
Explanation:
You just line up the elements to the mixture and whatever fits with all of the charts are the elements present in the mixture.
Identify arrows pointing to nonbonding electrons.
Answer:
C
Explanation:
Yessir
What kind of graph would use for this data? The months of the year and the amount of rainfall, and why
Answer:
A Desert Climatogram is a graph that shows the temperature and rainfall, for each month in the year, for the Desert.
Explanation:
A. How many molecules of sugar are in 20.5 g of sugar?
Answer:
By definition, one mole (one gram molecular weight) of any substance, contains Avogadro’s number of particles; atoms if you are discussing an element, or molecules if a compound. Avogadro’s number has been determined by several methods, all of the accepted values lie within a range of +-1% about the value of 6.022045 x 10^23/gm. That is a large number, in this case approximately; 602,204,500,000,000,000,000,000 molecules of glucose.
Autism is a disability that results from a disorder in the central nervous system. It has been speculated that the increasing number of cases of autism in recent years is due to the increase in the number of vaccinations given to young children. What might be another possible explanation for this phenomenon?
Answer:
Explanation:
As described in the question, autism is a disability that arises from a disorder in the central nervous system which is actually characterized by abnormality in the brain structure and then function. Autism is known for symptoms such as challenges with communication and interaction and some obsessive behaviors. While there is generally no known scientific cause for autism but trends have suggested that vaccination in young children causes autism.
However, genes could also be involved in this phenomenon because there have been reports of unusual genetic sequence in children that have autism. Hence, there is a possibility that vaccination actually triggers this genetic sequence which is then expressed as autism in the children.
Please note this isn't a scientific fact and just a possibility as requested in the question.
Find the mass of an object that has a density of 1.5g/cm^3 and has a volume of 8cm^3 power
Answer:
The answer is 12 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
volume = 8 cm³
density = 1.5 g/cm³
We have
mass = 8 × 1.5
We have the final answer as
12 gHope this helps you
The inflation of airbags is due to the breakdown of a single chemical substance into two separate substances. Two molecules of sodium azide (NaN3) break down into sodium (Na) and nitrogen gas (N2) during the reaction. How many sodium (Na) atoms are produced in the reaction? 1 Na atom 2 Na atoms 3 Na atoms
Answer:
The correct answer is 2 Na atoms
Explanation:
To determine the number of sodium atoms produced in this reaction, the reaction described in the question must be written out in an equation and then balanced
2NaN₃ ⇒ 2Na + 3N₂
From the equation above, it can be deduced that the number of sodium atoms produced in the reaction described in the question is 2
Answer:
C) 2 Na atoms
Explanation:
You are a high school track & field coach and you have a young female athlete who is running a competitive mile pace (5:20). This would make her competitive at the state and national level. You want to help this athlete to maintain and even increase her competitive potential. What would you do?
Answer:
By ensuring she is giving speed endurance training
Explanation:
Speed endurance training would be the most ideal in helping an athlete to maintain and even increase her competitive potential.
The speed endurance training would help the athlete maintain and attain a high speed for a longer duration of time.
This would make the athlete get used to running an improved time for much longer distances.
Someone help me plz.
In each of the following pairs, circle the form of radiation with the LONGER WAVELENGTH:
A. red light or blue light
B. microwaves or radiowaves
C. infrared radiation or red light
D. gamma rays or UV rays
Answer:
In the first one in a it is red light in b it is radio waves in c it is infrared radiation and d is UV radiation
Explanation:
The forms of radiation from the pairs listed that have longer wavelength are :
A) Red light
B) Radio waves
C) Infrared radiation
D) UV rays
Red light have a wavelength between 650 to 720 nm while a Blue light has a wavelength of 380nm to 500nm which makes it to produce a high energy visible light.( HEV ) light. therefore the Red light has a longer wavelength.
The wavelength of a microwave is approximately 30 centimeters to 1 millimeter, which makes it shorter than the wavelength of a radio wave ( shortest wavelength in the electromagnetic spectrum.
Hence we can conclude that The forms of radiation from the pairs listed that have longer wavelength are A) Red light B) Radio waves C) Infrared radiation D) UV rays
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Why does oil float and not sink?
Answer:
because it has more density than water
Answer:
This is because oil is less dense than water and therefore it floats to the surface.
Science Graded Assignment Help. Extra points! Due by: 29th of October