Someone Help Me Pls
Describe the relationship between Chemistry and PCR test
Answer:
In Chemistry, proteins are defined as biomolecules that are essential for the human body to maintain homeostasis. In a PCR test, short for Polymerase Chain Reaction test, scientists are tracking for a certain chemical substance in our body that may be present in the process of protein synthesis or DNA replication that could possibly show if a person is positive for the Corona Virus.Therefor, the relation between Chemistry and the PCR test is that, without Chemistry, the PCR test would not be able to stand on its own, which in other words means the PCR test is dependent upon the presence of Chemistry.
PLEASE HELP!!!!!!
How would you modify the flashlight to increase the amount of energy it releases
Answer:
add a major conductor
Explanation:
NH4CL + CaO -> NH3 + H2O + CaCl2
Balance the equation for the overall reaction using the smallest whole-number coefficients.
__NH4CL
__CaO
__NH3
__H2O
__CaCl2
plz help i will give 32 points is it weather or climate i need help asap and i will give brainly
1. It snowed 5 inches last night weather or climate
2.It has not rained this month weather or climate
3.it usually rains a lot in april weather or climate
4.this winter might be colder than other whether or climate
5.it was very foggy this morning weather or climate
6.There is a severe thunderstorm watch for this area today weather or climate
7.The temperature always reaches over 100 degrees in the summertime in Texas weather or climate
8.Last night had a low temperature of 38 degrees weather or climate
9.The skies are so clear today weather or climate
10.It is very sunny today weather or climate please help
Answer:
1= weather
2= climate
3=climate
4= climate, i think
5= weather
6= weather
7= climate
8=weather
9= weather
10= weather
hope this helps!
Explanation:
weather is typically over a short period, climate is over a long time.
Answer:
the dude who has the answeres are right
Explanation:
how many grams of molecular oxygen (O2) is produced from 13.8 grams of calcium chlorate (Ca(ClO3)2)in the following chemical reaction?Ca(ClO3)2→CaCl2+ 3O2
Answer:
6.72 g
Explanation:
Given data:
Mass of calcium chlorate = 13.8 g
Mass of oxygen produced = ?
Solution:
Chemical equation:
Ca(ClO₃)₂ → CaCl₂ + 3O₂
Number of moles of calcium chlorate:
Number of moles = mass / molar mass
Number of moles = 13.8 g/ 206.98 g/mol
Number of moles = 0.07 mol
Now we will compare the moles of oxygen and calcium chlorate.
Ca(ClO₃)₂ : O₂
1 : 3
0.07 : 3×0.07=0.21 mol
Mass of oxygen:
Mass = number of moles × molar mass
Mass = 0.21 mol × 32 g/mol
Mass = 6.72 g
Kelly ran electricity though a sample of water using electrolysis. the water changed into two gases,x and y.it was not possible to break down the gasses x and y into simpler particles.which statement is best supported by this evidence.
a.the gas y is a water vapor.
b.water is an element.
c.the gases x and y are compounds.
d.the gases x and y are elements
Answer:
d.the gases x and y are elements
Explanation:
Since it is impossible to further break down the gases produced during this electrolytic process, we can conclude that the gases x and y are elements.
An element is a distinct substance that cannot be split up into simpler substances. Such substances are made up of only one kind of atom.
It is impossible through chemical reactions split an element into simpler units.
A list of scenarios is shown below.
I. Water is running
II. A car is parked on a hill
III. One liter of gasoline sits on a bench
Which of the scenarios has kinetic energy?
A
1, only
В.
II, only
с
II and III, only
D
I and III, only
Please help
Answer:
A
Explanation:
A: because for something to have kinetic energy it has to be in motion, the other 2 scenarios are not moving.
HELP ME PLS!! I FORGOT TO STUDY Which may result from an increase in friction?
decreased traction
increased speed
reduced wear and tear
generation of heat
Answer: Generation of heat
Explanation: 1, 2 and 3 are wrong because traction actually increases, speed decreases and wear and tear is produced.
Hope this helps you, love!
Answer:
A, C, and D
Explanation:
answer correctly for brainleist! (have to be correct) and u get 10 pts! ASAP
Answer:
the first choice i believe
Explanation:
How can water be changed into ice
Answer:
- The molecules stick together and form a solid making ice
- By removing heat
Pls help 7th grade science
Answer:
It would be the first one, an overall positive charge on one end and overall negative charge on the other end.
Explanation:
Answer:
It's A.) A molecule that has an overall positive change in one end and an overall negative charge on the other
Explanation:
The definition of a polar molecule is a molecule with a negatively charged end and a positively charged end.
Help meee, if u help me i give u a pizza :)
Describe the levels of organization of a complex, multicellur organism such as a mouse starting with the cell
The level of organization of a complex, multicellular organism such as a mouse, starting with the cell, is. The cellular level, the tissue level, the organ level, the organ system, and lastly the organism.
What is level or organization?The level of organization of the body is the organization of the body with the smallest unit like the cell. As we know, the smallest unit of life is the cell. So the organization of energy in living organisms starts with a cell.
The cellular level is the cells, the cell combine to form tissue and many tissues join together to form an organ. Many organs join together to create an organ system, and the organ system establishes an organism.
Thus, starting with the cell, the organization of a complex, multicellular creature like a mouse is. cell level, tissue level, organ level, the organ system, and finally organism level.
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please help with these questions, it is due soon
Properties of lonic compounds are_____
at room temperature.
fluorine electron configuration
Answer:
what about it
Explanation:
2Ni(OH) → Ni2O + H2O
How many moles of water forms from 4.20 mol of nickel (I) hydroxide?
Answer:
2.1 moles of water formed.
Explanation:
Given data:
Moles of water formed = ?
Moles of Ni(OH) = 4.20 mol
Solution:
Chemical equation:
2Ni(OH) → Ni₂O + H₂O
Now we will compare the moles of Ni(OH) with water.
Ni(OH) : H₂O
2 : 1
4.20 : 1/2×4.20 = 2.1 mol
2.1 moles of water formed.
Name Formula: Lead (II) Oxide
F) Pb2O
G) PbO2
H) PbO
I) Pb2O2
Answer:
PbO is the Answer
Explanation:
How many oxygen atoms are there in 98.4g of oxygen gas. Hint: oxygen gas just might be diatomic! Be warned that on a test you will NOT be told if an element is diatomic. You need to memorize the diatomic elements.
Answer:
3.702×10^24 atoms of Oxygen.
Total, 6.15 moles of oxygen atoms in 98.4g of oxygen gas (O₂), which is equivalent to 6.15 × 6.022 × 10²³ (Avogadro's number) oxygen atoms.
Oxygen gas (O₂) is indeed diatomic, meaning it exists as a molecule with two oxygen atoms bonded together.
To calculate the number of oxygen atoms in 98.4g of oxygen gas (O₂), we need to use the molar mass of oxygen and the given mass.
The molar mass of oxygen (O₂) will be 32.00 g/mol.
Number of moles of oxygen gas = Mass (g) / Molar mass (g/mol)
Number of moles of oxygen gas = 98.4 g / 32.00 g/mol
≈ 3.075 moles
Since each molecule of oxygen gas (O₂) contains two oxygen atoms, the number of oxygen atoms will be twice the number of moles of oxygen gas.
Number of oxygen atoms = 2 × Number of moles of oxygen gas
Number of oxygen atoms ≈ 2 × 3.075 moles
≈ 6.15 moles
Therefore, there are approximately 6.15 moles of oxygen atoms in 98.4g of oxygen gas (O₂), which is equivalent to 6.15 × 6.022 × 10²³ (Avogadro's number) oxygen atoms.
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A seismograph is usually placed on the surface of the ground to feel any vibration.
True
False
Answer:
So yes it True.
Explanation:
A seismometer is the internal part of the seismograph, which may be a pendulum or a mass mounted on a spring; however, it is often used synonymously with "seismograph".
Seismographs are instruments used to record the motion of the ground during an earthquake. They are installed in the ground throughout the world and operated as part of a seismographic network. The earliest "seismoscope" was invented by the Chinese philosopher Chang Heng in A.D. 132. This did not, however, record earthquakes; it only indicated that an earthquake was occurring. The first seismograph was developed in 1890.
A seismograph is securely mounted onto the surface of the earth so that when the earth shakes, the entire unit shakes with it EXCEPT for the mass on the spring, which has inertia and remains in the same place. As the seismograph shakes under the mass, the recording device on the mass records the relative motion between itself and the rest of the instrument, thus recording the ground motion. In reality, these mechanisms are no longer manual, but instead work by measuring electronic changes produced by the motion of the ground with respect to the mass.
A seismogram is the recording of the ground shaking at the specific location of the instrument. On a seismogram, the HORIZONTAL axis = time (measured in seconds) and the VERTICAL axis= ground displacement (usually measured in millimeters). When there is NO EARTHQUAKE reading, there is just a straight line except for small wiggles caused by local disturbance or "noise" and the time markers. Seismograms are digital now - there are no more paper recordings.
I hope this helps:3
A seismograph is placed on the surface of the ground to detect any vibration. Therefore, the given statement is correct.
What is a seismograph?A seismometer can be described as an instrument that responds to ground noises and shaking such as earthquakes, volcanic eruptions, and explosions. Seismometers are generally attached with a timing device and a recording device to create a seismograph.
The output of such a device is recorded on paper or film, now recorded and processed digitally known as a seismogram. This data is used to locate and characterize earthquakes, and to study the internal structure of the earth.
A seismoscope is used to trigger the device to start recording, and then a recording surface would form a graphical illustration of the tremors automatically.
A seismometer feels the up-down motions of the Earth that move along with any motion detected. The relative motion between the weight and the frame offers a measurement of the vertical ground motion.
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B.Read the problem and answer the question that follow
Annalyn weighs 45.3 kg. Roby is 2.56 kg lighter than Annalyn. Together with Cecille, the three of them weigh 150.09 kg. How much does Cecille weigh?
6.What are the given facts in the problem?
7.Are there hidden questions? What are they?
8.What operations will use to solve the problem?
9.What is the solution yo the problem?
10.How will you check if your answer makes sense?
Answer: See explanation
Explanation:
Annalyn weighs 45.3 kg.
Roby is 2.56 kg lighter than Annalyn. This means that the weight of Roby will be:
= 45.3kg - 2.56kg
= 42.74kg
Together with Cecille, the three of them weigh 150.09 kg. Cecille weight will be:
45.3kg + 42.74kg + Cecille = 150.09kg
88.04kg + Cecille = 150.09kg
Cecille = 150.09kg - 88.04kg
Cecille weight = 62.05kg
To check of my answer is correct, I'll add all their ages together. This will be:
= 45.3kg + 42.74kg + 62.05kg
= 150.09kg
please I need help with everything
Answer:
See below!
Explanation:
An acid (A) will have acid in the name. It will also have a hydrogen bonded to an electronegative compound. A molecular compound (M) will have nonmetals and/or hydrogen. An ionic compound (I) will have nonmetals and first and second column metals. It could also include charged compounds. A transition metal (TM) will have a transition metal in the compound.
The formulas for TM and I are made by balancing the charges of the atoms to equal zero. The formulas for M can be found from the name itself. The formulas for A have to be memorized.
TM ==> copper (II) oxide ==> CuO
A ==> hydrosulfuric acid ==> H₂S
TM ==> iron (III) fluoride ==> FeF₃
TM ==> lead (II) chlorate ==> PbCl₂
A ==> hydrochloric acid ==> HCl
M ==> dihydrogen monoxide ==> H₂O
A ==> sulfurous acid ==> H₂SO₃
I ==> potassium oxide ==> KO
I ==> ammonium hydroxide ==> NH₄OH
M ==> nitrogen trioxide ==> NO₃
I ==> aluminum phosphate ==> AlPO₄
To name ionic (I) compounds, simply put the name of the metal with the nonmetal. But, for the nonmetal change, the ending to "-ide". To name acids (A), say hydro- with the atom/compound it is attached to and end with acid.
I ==> MgSO₄ ==> magnesium sulfate
I ==> HgS ==> mercury sulfide
I ==> Na₂S ==> sodium sulfide
A ==> HF ==> hydrofluoric acid
I ==> KCN ==> potassium cyanide
What is a binary acid? ______________________________________________________
________________________________________________________________________
2) What is a monatomic ion? ___________________________________________________
3) What is a polyatomic ion? ___________________________________________________
4) Where are the halogens located on the periodic table?
Answer:Binary acids are acids composed of two atoms ,a hydrogen element and non metal element .Binary acids are also known as Hydracids.
Explanation:For example
Hydrochloric acid (HCl), hydrofluoric acid (HF), and hydroiodic acid (HI) are all binary acids.
If a crystal lattice structure is so hard, what causes most ionic compounds to be brittle?
A. Applying force, such as striking the crystal with a hammer, can release protons, causing ions of similar charges to align, repel each other, and dissolve the crystal.
B. Applying force, such as striking the crystal with a hammer, can release electrons, causing ions to alter their charges, repel each other, and dissolve the crystal.
C. Applying force, such as striking the crystal with a hammer, can shift one layer of ions, causing ions of different charges to align, repel each other, and fragment the crystal.
D. Applying force, such as striking the crystal with a hammer, can shift ions, causing ions of similar charges to align, repel each other, and fragment the crystal.
Explanation:
The cations and anions are locked tightly into place because of the attraction of their opposite charges - as a result, it's difficult to move the ions and the material is very hard.
Answer:
d
Explanation:
https://chemistry.stackexchange.com/questions/33322/why-are-so-many-ionic-compounds-brittle
A laboratory bottle of helium gas occupies a volume of 2.0 L at 760 mm Hg. Calculate the new pressure if the volume falls to 1.8 L.
Answer: 844 mm Hg
Explanation:
first to answer correctly gets 10 pts plus brainleist! (must answer correcty tho)
Answer:
Explanation:
sorry dont understand
Answer: D. The speed of rotation of the Earth on its axis
Explanation: How fast Earth spins determines the number of hours in a given day.
Which statement is true of rectangles Y and Z? Rectangle Y has a length of 6 and width of 4. Rectangle Z has a length of 4 and width of 3. They are congruent because their corresponding angles are congruent. They are similar because their corresponding angles are congruent. They are similar because their corresponding side lengths are proportional. They are not similar because their corresponding side lengths are not proportional.
Answer:
b
Explanation:
Answer:
ita b
Explanation:
trust fam
ik its confusing so you can just go to the pdf
1. Which letters show the balls with the maximum potential energy? A D E G 2. Which letter shows the ball with the maximum kinetic energy? B C D G 3. Which letters show the balls with the least kinetic energy? A B F G 4. Which letter shows the ball with the least potential energy? C D E G 5. Which letters show the balls with a little less kinetic energy than ball C? A B D F 6. Which letters show the balls with a little more potential energy than ball D? C D E F 7. Which letters show the balls with a little more potential energy than ball F? A C E G 8. Which letters show the balls with a little less potential energy than ball G? A B F G 9. Which letter shows the ball with a little more kinetic energy than ball C? B C D F 10. Which letter shows the ball with a little less potential energy than ball E? B D E F 11. What TWO things decide the amount of kinetic energy an object can have? ______________________________________________ 12. Name two other things that can show kinetic and potential energy in action.
1 A
2 C
3 G
4 D
5 E
6 A and G
7 D and E
8 F
9 B
10 C
11 if it is in motion and how much motion it has
12 a bow being pulled back shows potential and dropping a ball can chow kinetic
IM SO SRRY don't feel bad
Answer:
I’m sad
Explanation:
Most thermal conductors are made of which material?
Answer:
copper
Explanation:
Answer:
metal
Explanation:
I only need help on the first one. Please help me
Answer:
No, it is not an example of a mutation.
Explanation:
Mutations occur in the chromosomes of the organism, in this case the fly. A mutation is a permanent alteration in the DNA of the fly. Therefore, if the fly were to have purple wings when it was born then it would be a mutation. However, in this case we dyed the wings of the fly purple. This does not alter or change the DNA in any way to cause a mutation.
Hope this helps!!
- Kay