They vibrate slower.
Answer:
true
Explanation:
What separation method collects vapor
Answer:
evaporation and distilation
Explanation:
Describe the current model of the atom. Name the parts of this model and describe each part.
Answer:
the electron cloud model is the current model of atom
What Happens When extra Solute is added to unsaturated ,saturated and supersaturated solution
of water is 36.0 g. If any more NaCl is added past that point, it will not dissolve because the solution is saturated. If more solute is added and it does not dissolve, then the original solution was saturated. If the added solute dissolves, then the original solution was unsaturated.
A 200.0-mL sample of helium gas is in a cylinder with a movable piston at 110 kPa and 275 K. The piston is pushed in until the sample has a volume of 95.0 mL. The new temperature of the gas is 310. K. What is the new pressure of the sample?
51.1 kPa
261 kPa
249 kPa
274 kPa
Answer:
P₂ = 261 KPa
Explanation:
Given data:
Volume of sample = 200 mL
Initial pressure = 110 KPa
Initial temperature = 275 K
Final volume = 95 mL
Final temperature = 310 K
Final pressure = ?
Solution:
Formula:
P₁V₁/T₁ = P₂V₂/T₂
P₂ = P₁V₁T₂ /T₁ V₂
P₂ = 110 KPa× 200 mL× 310 K /275 K × 95 mL
P₂ = 6820000 KPa / 26125
P₂ = 261 KPa
Which of the following is a CHEMICAL CHANGE?
A- Buttering Toast
B- Melting ice Cream
C-An egg gives off a rotten smell
D-sugar is dissolved into water
E- baking soda mixed with vinegar forms bubbles
F- boiling water forms bubbles
G-Iron turns red as it rusts
H-Iron turns red as it is heated
Answer:
G, but I think that theres more than one answer
increased amounta of carbon dioxide in Earth's atmosphere may lead to global warming. what might global warming then lead to
air temperatures increasing.
9. A box is pushed 1.5 m to the right in 5 s. What is the box’s average speed to the nearest hundredth of a m/s? *
Answer:
s = 0.30 m/s
Explanation:
Given data:
Distance travel = 1.5 m
Time taken = 5 s
Average speed of box = ?
Solution:
s = d/t
s = speed
d = distance
t = time
by putting values,
s = 1.5 m/ 5 s
s = 0.30 m/s
Select the conditions that are required for the formation of hurricanes. (Choose 3)
A: cold,cyclonic wind
B: deep ocean water
C: cold ocean water
D: warm,humid wind
E: warm ocean water
F: a strong cold front
Answer:
A: cold, cyclonic wind
B: deep ocean water
C: cold ocean water
E: warm ocean water
F: a strong cold front
You only need A, B, C, E, F not D because that for tornadoes buddy.
What determines whether something is a solid, a liquid or a gas?
If the atomic number increases then the atomic radius should decrease right? So what’s wrong with my data
Answer:
Atomic radius increases by increasing the atomic number.
Explanation:
Atomic radius :
Atomic radius is the distance between nucleus of an atom to its outer most electronic shell.
Trend along group:
As we move down the group atomic radii increased with increase of atomic number. The addition of electron in next level cause the atomic radii to increased. The hold of nucleus on valance shell become weaker because of shielding of electrons thus size of atom increased.
As the size of atom increases the ionization energy from top to bottom also decreases because it becomes easier to remove the electron because of less nuclear attraction and as more electrons are added the outer electrons becomes more shielded and away from nucleus.
The given data show that the atomic number in increased from 4 to 88 it means atomic radius also increased from 1.53Å to 2.83Å. It means the given data is the elements of periodic table present in group. It is the data of 2nd group of periodic table.
Which of the following values displays the pH of a base?
Question 19 options:
2
7
9
Answer:
9 is your answer
Explanation:
coz anything above 7.0 is Base on PH paper !
Hope you got it.
Which of these properties can be used to separate mixtures? - characteristic properties *
1. state of matter
2. mass
3. volume
4. boiling/melting point
5. density
6. conductivity
7. solubility
Answer:
Boiling/melting point
Explanation:
Some elements can’t handle the heat nor the cold, so they separate like oil & water.
What is the difference between carbon-12, carbon-13, and carbon-14?
Answer:
Number of neutrons in the nucleus.
Explanation:
Mass number is protons plus neutrons. Protons do not change from isotope to isotope
write the correct representation of an element x which contains 12 electrons and 16 neutrons
Answer:
²⁸Mg
Explanation:
12 electrons means it is a Mg;
A typical Mg has 12 neutrons, but this has 16 hence it must be an isotope with 4 extra neutrons.
Bobbye wants to know how his speed affect the amount of time it takes to stop at a stop sign. Each time he performs a trial, he will change the speed that he is driving to see how it affects the amount of time it takes to stop. Independent Variable: Dependent Variable: Controlled Variables:
Answer:
The correct answer is -
Independent Variable: change of speed
Dependent Variable: time takes to stop
Controlled Variables: stop at a stop sign
Explanation:
To know the effect of the speed to take the time to stop at a stop sign Bobbye perform this exercise where he changes the speed at each time that he is driving to know the time it takes to stop at a stop sign. There is a change that takes place purposely is in the speed of driving so it is an independent variable as the independent variable is a variable that is manipulated in an experiment or investigation.
The time it takes to stop is the factor that depends on the speed so it is the dependent variable as the dependent variable is the variable that depends on the independent variable.
The control variable remains the same or constant in an investigation which is stoping at a stop time irrespective of speed.
Which is most likely the result of millions of metal atoms crowding together so that molecular orbitals become combined?
Answer:
(The Formation Of Bands In A Crystal)
The production of 2-methyl-2-phenyl propane. This would be a two-step synthesis.
Can someone explain what is this reaction ?
Which describes a covalent bond?
a. Formed by the sharing of electrons between atoms
b. Formed by the giving and taking of electrons between atoms.
c. Formed by the forces of gravity between atoms.
d. Formed by sharing protons and neutrons between atoms
Answer:
a
Explanation:
covalent bonds are bonds between two nonmetals where they share an electron :)
How would an invasive species affect an ecosystem?
Group of answer choices
The invasive species would integrate easily into the ecosystem.
The invasive species would take over in the area and throw off the balance of the ecosystem.
The invasive species would balance the ecosystem.
The invasive species would change the abiotic factors in the area.
Answer:
The invasive species would take over in the area and throw off the balance of the ecosystem.
Explanation:
Invasive species can harm both the natural resources in an ecosystem as well as threaten human use of these resources. An invasive species can be introduced to a new area via the ballast water of oceangoing ships, intentional and accidental releases of aquaculture species, aquarium specimens or bait, and other means.
Invasive species are capable of causing extinctions of native plants and animals, reducing biodiversity, competing with native organisms for limited resources, and altering habitats. This can result in huge economic impacts and fundamental disruptions of coastal and Great Lakes ecosystems.
Hope this helped!
What data do scientists use to determine when a volcano might erupt?
Whoever gives me the right answer will get brainliest.
Answer:
seismographs
Explanation:
Scientists use seismographs that record the length and strength of each earthquake to try to determine if an eruption is imminent. Magma and gas can push the volcano's slope upward.
A control is....
A: What we measure
B: What we change
C: What we measure that does not have the variable we are testing.
D: What we conclude
Which of the following is a true difference between protons and neutrons?
a
the have different masses
b
they are in different locations in the atom
c
the proton identifies the atom and the neutrons does not
d
all of the choices are true
Answer:
D
Explanation:
Sodium will do an ionic bond with
Answer:
Chorine
Explanation:
It's a classic, sodium chloride, table salt, which is an ionic bond.
PLS GIVE BRAINLIEST
Arrange the following in order of increasing atomic radius: Mg, Na, P, Si, and Ar.
Answer:
Ar, P, Si, Mg, Na
Explanation:
Ar=106pm
P=107pm
Si=111pm
Mg=141pm
Na=166pm
Na>Mg>Si>P>Ar is the order of increasing atomic radius.
What are elements?Elements are the simplest substances which cannot be broken down using chemical methods.
Atomic radii vary in a predictable way along or across the periodic table. The atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus we can say that helium is the smallest element, and francium is the largest.
Ar=106pm
P=107pm
Si=111pm
Mg=141pm
Na=166pm
Hence, Na>Mg>Si>P>Ar is the order of increasing atomic radius.
Learn more about elements here:
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Describe the two types of mechanical energy
Answer:
Kinetic energy and potential energy
Explanation:
kinetic energy is when the energy is active and potential energy is when it is about to be active
Question 7
2 pts
(04.03 LC)
Which of the following steps can be used to identify a single replacement reaction? (5
points)
O Check whether the products are salt and water.
O Check if the ions of two compounds exchange places.
o Check if one element replaces another element in a compound.
Check whether the reactants are an acid and a base.
Answer:
d
Explanation:
check if one element replaces another element in a compound
The single replacement reaction can be identified when there has been the replacement of one element with another element in the compound. Thus, option C is correct.
The replacement reaction can be defined as the reaction in which the highly reactive element replaced the low reactive element in the reaction and forms a compound.
The reaction has been given as:
X + AY [tex]\rightarrow[/tex] AX + Y
The X has been highly reactive than Y replaces Y in the compound and forms the compound AX.
The single replacement reaction can be identified when there has been the replacement of one element with another element in the compound. Thus, option C is correct.
For more information about a single replacement reaction, refer to the link:
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Can someone help me click the picture
Answer:
A product
B coefficient
C script
D rectant
tell me about yourself
Answer:
Tell picture above is a sample of tell me about yourself
Fe (s) + Pb(NO3), (aq) —> ___
Type of reaction: _____
Answer:
lead , chemical
Explanation:
Which type of bond will chromium atoms likely to form with other chromium atoms
A:ionic
B:covalent
C:metallic
Answer: B
Explanation: Covalent bonds where electrons are not shared equally between two atoms are called polar covalent bond. As shown above, the electrons in a covalent bond between two different atoms (H and Cl in this case) are not equally shared by the atoms. This is due to the electronegativity difference between the two atoms.
There are two types of chemical compound one is covalent compound and other is ionic compound in chemistry. The covalent bond will be formed between two chromium atoms. the correct option is option B.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
Covalent bond formed by sharing of electron and ionic bond formed by complete transfer of electron.
Element with same electronegativity difference combine together by covalent bond whereas ionic bond is formed by elements whose electronegativity difference is high.
As two chromium is combining that is two two element with same electronegativity is combining therefore, formation of covalent bond is the only possibility.
Therefore covalent bond will be formed between two chromium atoms. the correct option is option B.
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