Answer:
It is important for scientists to be repeatable so it lets them see patterns and trends in their results. This is affirmative for their work, making it stronger and better able to support their claims. This helps maintain The integrity of data.
Repeating an experiment more than once helps determine if the data was a fluke, or represents the normal case. It helps guard against jumping to conclusions without enough evidence. The number of repeats depends on many factors, including the spread of the data and the availability of resources
Explanation:
Why does hydrogen naturally form diatomic molecules (H2), whereas helium exists as a single atom (He)?
Answer:
Hydrogen is a very reactive element. It doesn't exist as a single atom in nature. Neither do any of the other binary nonmetals -- nitrogen, oxygen, fluorine, chlorine, bromine, and iodine. They're too prone to react with something. They react with each other and form binary molecules because the binary molecules are more stable than single atoms (by a lot!). Compounds with other atoms are even more stable, so hydrogen reacts with oxygen to form water, and chlorine reacts with sodium to form table salt.
Explanation:
Lussac's Law, the pressure of a gas increases due to an increase in temperature because Group of answer choices the molecules strike the walls of the container more often. there is an increase in the number of gas particles. there is a decrease in the volume of the container. the molecules get bigger. the molecules strike the walls of the container less often. PreviousNext
Answer:
the molecules strike the walls of the container more often.
Explanation:
The pressure of a gas refers to the force per unit area exerted on the walls of container by gas molecules.
Since the average kinetic energy of gas molecules increases as the temperature of the gas increases, the molecules of the gas tend to strike the walls of the container more often as the temperature of the gas increases.
Hence, the pressure of a gas increases due to an increase in temperature because the gas molecules strike the walls of the container more often.
An oil may be converted into a substance that is solid at room temperature by Group of answer choices adding hydrogens, decreasing the number of double bonds in the molecules. cooling it, so that double bonds form and the fats solidify. removing water, causing a dehydration synthesis reaction to occur. removing hydrogens, increasing the number of double bonds in the molecules.
Answer:
Adding hydrogens, decreasing the number of double bonds in the molecules.
Explanation:
Hydrogen is a catalyst, which means that it accelerates or speeds up the velocity of a chemical reaction, by adding hydrogens to oil it will decrease the number of double bonds in the molecules which will make it solidify over time.
Oil + hydrogen creates substances that are solid at room temperature.
This woman comes to the clinic with high blood pressure,
hyperglycemia(high blood sugar), weakening of the bones and severe
depression of the immune system. Can you diagnose her condition?
6. Which of the following represent kinetic energy? *
(1 Point)
the water behind a dam
O a boulder hug from a net over a pit
a calculator falling to the floor
the string on a bow before being released
Answer:
weter
Explanation:
which of the following is a property of acids
A. they are slippery
B. They taste bitter
C. They react with oils
D. they are sour
Answer:
They are sour. =)
Explanation:
If you have 3 moles of a gas at a pressure of 2.5 atm and a volume of 8 liters, what is the temperature?
a. 57.86 K
b. 0.81 K
c. 25 K
d. 81.26 K
Answer:
d
Explanation:
pv=nrt
2.5×1.01×10^5×8×10^-3=3×8.31×T
T=
The value of the temperature can be determined by ideal gas law and the temperature will be 0.81 K.
What is temperature ?The average kinetic energy of particular atoms and molecules in a system is measured by the temperature.
What is ideal gas Law?
Ideal gas law explain the relationship between pressure. temperature and volume.
Ideal gas law can be expressed as, PV=nRT.
where, P is pressure. V is volume , n is number of moles ,R is gas constant and T is temperature. It is given that, n= 3 mole, P = 2.5 atm, V = 8 L, T=?, R = 8.31.
Calculation of temperature by using ideal gas law is shown as:
Now, put the values of given data in ideal gas law equation.
T = PV/nR
=2.5×8/3×8.32
= 0.81 K
Therefore, the temperature will be 0.81K.
To know more about ideal gas law and temperature click here.
https://brainly.com/question/13821925.
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How would the balloons interaction with each other change if the balloons were moved further apart? Explain.
Explanation:
It is known that like charges repel each other and unlike charges attract each other.
As the balloons are facing each other with like charges so they will repel each other. Hence, they will move apart.
But when balloons were moved further apart then interaction between them will decrease and then there will be no force of repulsion or force of attraction.
1. Tyrone is riding his newly bought motorcycle at 30 m/s when he sees a cat on the road ahead. He applied immediately the brakes and comes to a stop in 3.0 s. What was the acceleration of his motorcycle?
Given:
Asked:
Solution:
Final Answer:
2. A jeepney speeds up from 50 km/h to 60 km/h to overtake a truck. If this requieres 20 s, what is the (a) acceleration and (b) distance traveled by the car?
Given:
Asked:
Solution:
Final Answer:
Pls help
Answer:
1. a = -10 m/s²
2. a = 1.8 × 10³ km/h²; s = 0.31 km
Explanation:
1.
Given:
Initial speed (u): 30 m/s
Final speed (v): 0 m/s (rest)
Time elapsed (t): 3.0 s
Asked:
Acceleration (a)
Solution:
We will use the following expression.
a = (v-u)/t = (0 m/s - 30 m/s)/3.0 s = -10 m/s²
Final Answer:
a = -10 m/s²
2.
Given:
Initial speed (u): 50 km/h
Final speed (v): 60 km/h
Time elapsed (t): 20 s
Asked:
(a) Acceleration (a)
(b) Distance traveled (s)
Solution:
(a) First, we will convert the time to hours.
20 s × 1 h/3600 s = 0.0056 h
Then, we will use the following expression.
a = (v-u)/t = (60 km/h - 50 km/h)/0.0056 h = 1.8 × 10³ km/h²
(b) We will use the following expression.
s = u × t + 1/2 × a × t²
s = 50 km/h × 0.0056 h + 1/2 × 1.8 × 10³ km/h² × (0.0056 h)² = 0.31 km
Final Answer:
a = 1.8 × 10³ km/h²
s = 0.31 km
How many Group 17 elements are in Period 3 of the Periodic Table? A) 1 B) 2 C) 3 D) 4
HURRRY PLS!!
Glycolysis is a ten-step process that breaks down glucose into
A)
NAD+.
B)
two molecules of pyruvate.
C)
ATP.
D)
FAD.
Answer:
B. Two molecules of pyruvate.
Explanation:
Trust me. I got it RIGHT!
What is the term for the repeating pattern in a crystalline structure?
a) Repeating pattern
b) Base pattern
c) Unit cell
d) Primitive pattern
Answer:
Because a crystalline solid consists of repeating patterns of its components in three dimensions (a crystal lattice), we can represent the entire crystal by drawing the structure of the smallest identical units that, when stacked together, form the crystal. This basic repeating unit is called a unit cell.Aug 12, 2020
what form of energy does a glue gun produce when turned on?
Compare the following in the three states of matter
a) inter particle space
b)inter particle force of attraction
c)particle motion
Explanation:
Anything that occupies space and has mass is called matter.
(a) Inter particle space
Solids - Atoms of a solid substance are closely packed with each other due to which there is very less or no inter particle space.Liquids - Atoms of a liquid are little loosely packed due to which there is some inter particle space.Gases - Atoms of a gas are very loosely packed due to which there is large inter particle space.(b) Inter particle force of attraction
Solids - Atoms of a solid are attached to each other by strong force of attraction.Liquids - Atoms of a liquid have slightly less force of attraction as compared to a solid substance.Gases - Atoms of a gas have Vander waal forces. Hence, there is no inter particle force of attraction between atoms of a gas.(c) Particle motion
Solids - There is low or negligible particle motion between atoms of a solid.Liquids - There is high particle motion as compared to that present in a solid.Gases - There is very high particle motion as compared to solids and liquids.Help needed asap, I will mark the brainiest tomorrow after homework is graded (PLEASE NOT FUNNY BUSINESS)
Answer:
Oh my gosh
dis one pass me
What do you notice about the distance between the terrestrial planets compared with the spacing between the gas giants
Answer:
The spacing between the terrestrial planets is less than that between the gas planets.
Explanation:
Since the terrestrial planets which are Mercury, Venus, Earth and Mars have a distance of 0.4 AU, 0.7 A.U, 1.0 AU and 1.5 A.U respectively from while the gas planets which are Jupiter, Saturn, Uranus and Neptune have a distance of 5.2 AU, 9.6 AU, 19.6 AU and 30 AU respectively from the sun, we can see that the spacing between the terrestrial planets is much smaller than the spacing between the gas planets.
For example, the spacing between Mercury and Venus is 0.7 AU - 0.4 AU = 0.3 AU while that between Earth and Venus is 1.0 AU - 0.7 AU = 0.3 AU.
Also, the spacing between Earth and Mars is 1.5 AU - 1.0 AU = 0.5 AU.
Also too, the spacing between the gas planets is shown below the spacing between Jupiter and Saturn is 9.6 AU - 5.2 AU = 4.4 AU while that between Uranus and Saturn is 19.6 AU - 9.6 AU = 10.0 AU.
Also, the spacing between Neptune and Uranus is 30 AU - 19.6 AU = 10.4 AU.
Thus, we can see that the spacing between the terrestrial planets is less than that between the gas planets.
Note that AU means astronomical unit and 1 AU is the distance between the Earth and the Sun. 1 AU = 1.50 × 10⁸ km
Where are both earthquakes and volcanoes common?
a) in the earth’s interior
b) at transform fault boundaries
c) at focal points
d) at subduction zones
Directions: Each set of lettered choices below refers to the numbered statements immediately following it. Select the one lettered choice that best fits each statement. A choice may be used once, more than once, or not at all in each set. The following questions refer to the below molecules: (A) CO2 (B) H2O (C) CH4 (D) C2H4 (E) PH3 The molecule that has trigonal pyramidal geometry
Answer:
The given molecules are:
(A) CO2 (B) H2O (C) CH4 (D) C2H4 (E) PH3
Which one has trigonal pyramidal geometry?
Explanation:
According to VSEPR (valence shell electron pair repulsion) theory, a molecule with a central atom having hybridization sp3 and with one lone pair of electrons has trigonal pyramidal geometry.
Among the given molecules,
CO2 has central atom carbon with sp hybridization without lone pairs.
So, it is a linear molecule.
H2O, the central atom is oxygen with sp3 hybridization and oxygen has two lone pairs. So, its geometry is V-shape or bent.
CH4 has central atom carbon with sp3 hybridization and no pairs.
So, its geometry is tetrahedral.
C2H4 ethene has carbon atoms as the central atoms with sp2 hybridization and carbon has no lone pairs.
So, its geometry is trigonal planar.
Answer:
PH3 has central atom P with sp3 hybridization.
P has one lone pair on it.
Hence, the geometry of PH3 is trigonal pyramidal.
Is lotion pure or impure?
Answer:
Pure
Explanation:
Lotion is pure. Hope this helps!
Answer:
I think pure
hope this helps
have a good day :)
Explanation:
How many grams of NaOH are needed to make 250mL of a 0.1M NaOH solution?
Answer:
To make 250 ml of 0.1 M NaOH, you dissolve 1 gram NaOH in enough water to make a final volume of 250 mls.
Explanation:
Your welcome! :)
Given the translation (0,5), translate ordered pairs (9, 0) and (2,-4).
Answer:
(9,5) and (2,1)
Explanation:
Cuantos moles de CO2 se requieren para reaccionar con 2 moles de Ba (OH)2
Answer:
hola soy jess, tu respuesta esta aqui
¿cuantos moles de CO2 se requiere para reaccionar 2 moles de Ba(OH)2
2 mol Ba(OH)₂ × \frac{1molCO_{2} }{1molBa (OH)_{2}}
1molBa(OH)
2
1molCO
2
= 2 moles CO₂
Explanation:
espero que pueda ayudarte
hermana/hermano
lo que
hahahaha
Which of the following most likely happens when the number of particles of a gas decreases?
The pressure of the gas increases.
The pressure of the gas remains same.
The number of collisions of gas particles decreases.
The number of collisions of gas particles remains same.
Answer: C. The number of collisions of gas particles decreases
Explanation: As temperature decreases so does everything else same with increase.
When the number of particles of a gas decreases the pressure of the gas increases.
Factors affecting has pressureIn a container containing has molecules, they move about freely in the container but the pressure it exerts on its container depends increase of decrease of the has molecules by volume.
If the volume of a container is decreased, the gas molecules have less space in which to move around. As a result, they will strike the walls of the container more often and the pressure increases.
Therefore, when the number of particles of a gas decreases the pressure of the gas increases.
Learn more about gases here:
https://brainly.com/question/25736513
what is quantum physics
How does anatomy provide evidence for evolution?
I'll give brainlist!! Simple answer please.
What is the state of HNO3 in the reaction? HNO3 (g) --> NO2 (g) + 2 H2O (1) 1 point
+ O2 (g)
gas
liquid
aqueous
Answer:
gas
Explanation:
the answer is right in the question (g) stands for gas.
PLEASE HELP
Why can you not create a Punnett square to determine the height of an individual?
Answer:
Punnett squares do not provide accurate predictions on the distribution of phenotypes in offspring. ... This makes it difficult to make predictions regarding Down's syndrome since it cannot predict the prevalence of the offspring's genotypes about a population.
Explanation:
Limitations of Punnett squares as models of inheritance include the lack of information about likely variation in small samples such as individual families and the lack of information about population prevalence of parental genotypes (so no predictions can be made about population prevalence of offspring genotypes.
Q.does salt make water boil at a higher temperature?
Answer:
Yes
Explanation:
The salt increases the boiling point, meaning it make water boil at a higher temperature, and it decreases the specific heat capacity, meaning it will heat up quick.
Enzymes are proteins that speed up chemical reactions in the body.
How do they work?
A) They provide a path with lower activation energy.
B) They increase the concentration of reactants.
C) They decrease the concentration of products.
D) They increase the surface area of reactants.
Answer:
D. They Increase the surface area of reactants.
Explanation:
And why I say the answer is D, Because Enzymes are soluble protein molecules that can speed up chemical reactions in cells
When Enzymes are proteins that speed up chemical reactions in the body so here it increase the surface area of reactants. hence, option d is correct.
What are enzymes?It is the substance that is treated as the catalyst in the living organism.
In this, the biological process arises within the living organism are considered to be the chemical reactions.
Also, enzymes should be soluble protein molecules that speed up the chemical reaction in cell.
hence, the option d is correct.
learn more about an enzyme here: https://brainly.com/question/19346597
what's the chemical formula for salt, like is it NaCl??
the salt we eat???????
yeah it's NaCl, I just looked it up
Answer:
Yes
Explanation:
NaCl is table salt
Also known as sodium chloride