Answer:
It is a liquid gas
Explanation:
The spark of the lighter starts the fire which is exposed to the liquid gas in the lighter
Air that has been removed from a bell jar will NOT allow _____________ waves to travel through the jar. Question 4 options: sound light water
Answer:
Sound.
Explanation:
Sound requires a medium such as air to travel.
pleasee help ASAP
will mark brainliest!
Answer:
question 1- is B
question 2- is A
*I hope this helps you guys out!
Un aerosol contine 350 ml de gas en su interior . Su presion es de 5 atm. Un estudiante coloca un arosol en una bolsa plastica y lo oprime para que salga todo el gas la bolsa se infla hasta completar 2.5 L. Que presion hay en el interior de la bolsa
Answer:
,b dksb dfsj kdhfsu dfsh khfs fshk
Explanation:
An unknown substance is an excellent electrical conductor in the solid state and is malleable. What type of chemical bonding does this substance exhibit
Answer:
Ionic bonds
Explanation:
Two students made the Lewis dot diagrams of NH3. The diagrams are as shown. Two visual diagrams of an N H three molecule are shown. Student As diagram on the left has nitrogen at the center and connects with each hydrogen atom by an arrow pointing away from the nitrogen, one below, one on the right, and one on the left. There is a pair of dots above the nitrogen atom. Student Bs diagram on the right has nitrogen at the center connecting by a straight line to each hydrogen positioned below, to the left, and to the right of nitrogen. There is a pair of dots above the nitrogen atom. Which student drew the correct Lewis dot diagram? Only Student A Only Student B Both Student A and Student B Neither Student A nor Student B
Answer:
Only Student A
Explanation:
The first thing to consider in the diagrams of student A and B is to be sure that that the diagrams obey the octet rule and represent the written formula of ammonia (NH3). Clearly, only the diagram drawn by student A satisfy the these conditions.
If we look at the both diagrams closely, we will discover that the diagram drawn by student B does not satisfy the octet rule nor the trivalency of nitrogen even though it shows the lone pair of electrons on nitrogen hence it can not be the correct dot electron structure for NH3.
Answer: It is neither A or B
Explanation: I took the test and got this correct. Many people are saying only B, but that is wrong.
( please give brainliest :) )
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
How many atoms are there in 4.50 moles of Ba(NO^2)2
Answer:
There are 1031.85 grams in 4.50 moles of Ba(NO2)2
Explanation:
m = 4.50 × 229.3 = 1031.85
helpppppppp meeeeeee
Answer:
Synthesis
General Formulas and Concepts:
Chemistry - Reactions
Synthesis Reactions: A + B → AB Decomposition Reactions: AB → A + B Single-Replacement Reactions: A + BC → AB + C Double-Replacement Reactions: AB + CD → AD + BCExplanation:
Step 1: Define RxN
RxN: NH₃ + H₂SO₄ → (NH₄)₂SO₄
Step 2: Identify
Combining 2 compounds to form 1.
NH₃ + H₂SO₄ → (NH₄)₂SO₄
A + B → AB
It is a Synthesis Reaction.
James is trying newton's 2nd law of motion he tries to move four different objects with different Mass, Shape, and size from point a to point b. A toy car, a car kitchen table, and a refrigerator. what is the object that takes the most force to move
Answer:
By Newton's laws. we know that when we apply a force in an object, then we also are applying acceleration, given by the equation F =ma, where F is the applied force, m is the mass of the object and a is the acceleration.
Now in this problem, we only have that James want to move objects from point A to point B. If the problem says that James does it at the same time for each object, then we could assume that each object has the same acceleration A.
F = m*A
then if the mass of the o
object increases, the force needed to move it at the given acceleration will increase also, then the object that requires less force is the object with less mass, in this case, the toy car.
But in this problem never says that the objects are moved with the same acceleration (or in the same amount of time), then we could apply the same force in the four objects and eventually the four will get to the point b ( for example, the refrigerator would take a lot more of time than the toy car.
Answer:
it's c, the toy car.
Explanation:
A balloon contains 146.0mL of gas confined at a pressure of 1.30atm and a temperature of 5.00ºC. If the pressure changes to 2.60 atm and the temperature decreases to 2.00ºC, what will be the volume of gas in the balloon?
Answer:
V₂ = 72.2 mL
Explanation:
Given data:
Initial volume = 146.0 mL
Initial pressure = 1.30 atm
Initial temperature = 5.00 °C (5.00 +273 = 278 K)
Final temperature = 2.00 °C ( 2.00+273 = 275 K)
Final volume = ?
Final pressure = 2.60 atm
Formula:
P₁V₁/T₁ = P₂V₂/T₂
P₁ = Initial pressure
V₁ = Initial volume
T₁ = Initial temperature
P₂ = Final pressure
V₂ = Final volume
T₂ = Final temperature
Solution:
P₁V₁/T₁ = P₂V₂/T₂
V₂ = P₁V₁T₂ /T₁P₂
V₂ = 1.30 atm × 146.0 mL × 275 K / 278K × 2.60 atm
V₂ = 52195 atm .mL. K / 722.8 K.atm
V₂ = 72.2 mL
Look at the two diagrams below. Diagram 1 shows the locations of earthquakes and diagram 2 shows the locations of volcanoes around the world. Use the diagrams and what you know to select all statements that are true.
Look at the two diagrams below. Diagram 1 shows the locations of earthquakes and diagram 2 shows the locations of volcanoes around the world. Use what the diagrams and what you know to select all statements that are true.
Group of answer choices
Volcanoes and earthquakes often occur near the same places.
Volcanoes are never found near where earthquakes occur
Volcanoes and earthquakes often occur where two plates meet.
Earthquakes and volcanoes are frequent along The Ring of Fire
Volcanoes prevent earthquakes from occurring.
Group of answer choices
Volcanoes and earthquakes often occur near the same places.
Volcanoes are never found near where earthquakes occur
Volcanoes and earthquakes often occur where two plates meet.
Earthquakes and volcanoes are frequent along The Ring of Fire
Volcanoes prevent earthquakes from occurring.
Answer:
where two plates meet and ring of fire
Answer:
1. Volcanoes and earthquakes often occur where two plates meet.
Explanation:
2. Earthquakes and volcanoes are frequent along The Ring of Fire
In chemistry class, Allen determined the effectiveness of various metals in releasing hydrogen gas from hydrochloric acid. Several weeks later, Allen read that a utilities company was burying lead next to iron pipes to prevent rusting. Allen hypothesized that less rusting would occur with the more active metals. He placed the following into 4 separate beakers of water: (a) 1 iron nail, (b) 1 iron nail wrapped with an aluminum strip, (c) 1 iron nail wrapped with a magnesium strip, and (d) 1 iron nail wrapped with a lead strip. He used the same amount of water, equal amounts (mass) of the metals, and the same type of iron nails. At the end of 5 days, he rated the amount of rusting as small, moderate, or large. He also recorded the color of the water. What is the independent variable?
a) the amount of water
b) the metals strips
c) amount of rust
d) hydrochloric acid
Answer:
b) the metals strips
Explanation:
In an experimental design, an independent variable is a variable that is changed or manipulated in a series of experiments. An independent variable is not dependent on any other variable in the experiment. The hypothesis for this experiment is stated to be: "If the chemical activity of the metallic wrapper is increased, then less rusting of iron will occur. The independent variable relates to the type of metal wrapping strip, and the dependent variables are the amount of rusting and color of the water.
helppppp. which of the following statements regarding physical and chemical changes is true? a. both physical and chemical changes alter the atomic structure of a substance. b. neither physical not chemical changes alter the atomic structure of a substance. c. physical changes alter the atomic structure of a substance, while chemical changes do not. d. chemical alter the atomic structure of a substance, while physical changes do not. huryyyy
Answer:
B
Explanation:
I did it
Neither physical not chemical changes alter the atomic structure of a substance. The correct option is b.
What are chemical changes?When one chemical substance is transformed into one or more different substances, such as when iron becomes rust, a chemical change occurs.
Chemical changes occur as a result of chemical reactions, and the resulting substances have different properties due to the different arrangements of their atoms and molecules.
Physical changes affect a chemical substance's form but not its chemical composition.
Physical changes can be used to separate mixtures into their component compounds, but not to separate compounds into chemical elements or simpler compounds.
Physical or chemical changes have no effect on a substance's atomic structure.
Thus, the correct option is b.
For more details regarding chemical changes, visit:
https://brainly.com/question/23693316
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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.
Plz help me answer this!!
Answer:
cellular respiration and photosynthesis :)
Answer:
1.) Cellular Respiration (2.) Photosynthesis
Explanation:
Oxygen (O2) is a reactant in the process of cellular respiration and a product of photosynthesis.
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
PLEASE! 46 POINTS!
1.-There are millions of unique substances in the universe because elements can combine in many different ways to form _____.
A.-mixtures
B.-solutions
C.-compounds
D.-ions
2.- Water is an example of a(n) _____.
A.-unique substance
B.-chemical compound
C.-covalent compound
D.-all of the above
3.- Which statement is true about water and hydrogen peroxide?
A.-Both substances have the same properties.
B.-Both substances have the same chemical formula.
C.-Both substances consist of hydrogen and oxygen
D.-Both substances are mixtures of elements.
4.-. Chemical bonds always involve _____.
A.-ions
B.-atoms
C.-metals
D.-electrons
5. The ratio of elements in a given compound _____.
A.-is always 2 to 1
B.-is always the same
C.-may vary
D.-two of the above
6. An oxygen atom has eight valence electrons.
True
False
7. A molecule of carbon monoxide has two carbon atoms and one oxygen atom. True
False
8.- The types of bonds in chemical compounds determine many of their properties.
True
False
9.- The same elements may form different compounds.
True
False
10.- The chemical formula for carbon dioxide is CO2.
True
False
Answer:
1. compounds
2. Covalent Compound
3. Not sure
4. ions
5. C
6. false
Answer:
1. compounds
2. Covalent Compound
3. Both substances have the same chemical formula
4. ions
5. C
6. false
Write the group number using both A/B and 1-18 notation for elements that have the
following outer electron configuration:
a 252
b. 3523p3
c. 4s23
d. 5524d105p4
C - chemical change
P- physical change
(Pls help me)
Answer:
Burning wood is a chemical change. Burning wood is an example of a chemical reaction in which wood in the presence of heat and oxygen is transformed into carbon dioxide, water vapour, and ash.
Baking an apple pie is a physical change because the apples in the pie start changing physically and the pie crust starts hardening and rising up.
Explanation:
1.Which statement(s) is/are true about a divergent plate boundary? Check all that apply.
A.new crust is created here
B.an ocean trench is found here
C.a rift valley is associated with this boundary
D.subduction occurs at this boundary
E.a mid-ocean ridge is found at this boundary
F.San Andreas is an example of this type of boundary
G.sea floor spreading occurs here
--------------------------------------------------------------------------------------------------------------------------------
2.Which statement(s) is/are true about a transform plate boundary? Check all that apply.
A.an ocean trench is found here
B.earthquakes frequent this boundary
C.subduction occurs at this boundary
D.two plates are sliding past each other
E.San Andreas is an example of this type of boundary
F.an ocean trench is found here
--------------------------------------------------------------------------------------------------------------------------------
3.Which statement(s) is/are true about a convergent plate boundary? Check all that apply.
an ocean trench is found here
a rift valley is associated with this boundary
subduction occurs at this boundary
volcanic island chain might occur here
folded mountains might form here
earthquakes might occur here
San Andreas is an example of this type of boundary
--------------------------------------------------------------------------------------------------------------------------------
SINCE THIS IS ALOT OF THINKING I AM GIVING A GOOD AMOUT OF POINTS.....
PLEASE DONT SCAM AND STEAL THE POINTS
Answer:
I know the first one is c or e but i not sure what the others are, the second one is- wait are you sure your in 6th grade lol? I dont remember learning this
Answer:
OMG ITS MEHH
Explanation:
For the water, what color is the oxygen molecule?
Answer:
red
1: The SCP/E-water molecule: oxygen atom (red color) and hydrogen atoms (white color).
Explanation:
formula equation is more informative than a word equation why
Answer:
yes
Explanation:
this is because the formula equation shows the details on how they solved the equation
Which of the following subatomic particles are found surrounding the nucleus and have a negative charge?
F negatrons
G neutrons
H protons
J electrons
Answer:
J electrons
Explanation:
Electrons are the negatively charged subatomic particles that surrounds the nucleus of an atom.
Electrons occupy the bulk volume of an atom. These particle was discovered by J.J ThomsonThey found orbiting the extra-nuclear space of every atom. The nucleus is made up of protons and neutrons.Sounds with small amount of energy______distances than sounds with more energy
A.Shorter
B. Longer
C.same
D. Medium
explain why density is more useful for identifying a substance than either mass or volume
Answer:
Mass and volume are extrinsic properties.
A pail may contain water that is 1 kg in mass and 1 L in volume.
A drop of water may be 1 g in mass and 1 mL in volume.
Both are water, but they have different mass and volumes. Therefore you can't identify whether a substance is water just by measuring its mass and volume.
However, the ratio of the mass to volume (density) can be used to identify substances.
at what distance above the surface of the Earth is the acceleration due to Earth gravity 0.95 metre per second
square
To Find :
At what distance above the surface of the Earth is the acceleration due to Earth gravity 0.95 meter per second square.
Solution :
Let, acceleration due to gravity at height h is [tex]g_h[/tex].
[tex]\dfrac{g_h}{g}=\dfrac{R^2}{(R+h)^2}\\\\\dfrac{(R+h)}{R}=\sqrt{\dfrac{9.8}{0.95}}\\\\\dfrac{(R+h)}{R}=3.2\\\\h = 3.2R - R\\\\h = 2.2R\\\\h = 2.2\times 6400 \ km \\\\h = 14080\ km[/tex]
Therefore, the height is 14080 km.
Hence, this is the required solution.
There are 110 calories (kicalorie) in one serving of cereal. How many calories is that? (Please help meeee)
Answer:
110 calories
Explanation:
110 calories is already 110 calories XD
PLS GIVE BRAINLIEST
Help easy valence electrons question (picture)
Answer:
4,7,2
Explanation:
Count the amount of electrons on the outer shell on each question.
a. 4 valence electrons
b. 7 valence electrons
c. 2 valence electrons
Asbestos is a fibrous silicate mineral with remarkably high tensile strength.But it is no longer used because airborne
asbestos particles can cause lung cancer. Grunerite, a type of asbestos, has a tensile strength of 15 x 102 kg/mm2 (thus, a strand of grunerite with a 1-mm2 cross-sectional area can hold up to 15 x 102 kg). The tensile strengths of aluminum and Steel No. 5137 are 25 x 104 Iblin2 and 5.0 x 104 Iblin2, respectively. Calculate the cross-sectional area (in mm2) of wires of aluminum and of Steel No. 5137 that have the same tensile strength as a fiber of grunerite with a cross-sectional area of
1.0 micro.mZ
Answer:
Area of aluminum = 8.53 * 10⁻⁶ mm²
Area of steel = 4.27 * 10⁻⁶ mm²
Explanation:
1 in² = 645.16 mm²
1 lb = 0.453592 kg
Tensile strength of Grunerite = 1.5 * 10² kg/mm²
Tensile strength of aluminum = 2.5 * 10⁴ lb/in²
Tensile strength of aluminum = 2.5 * 10⁴ * (0.453592 kg/lb /645.16 mm²/in²)
Tensile strength of aluminum = 17.58 kg/mm²
Tensile strength of Steel No. 5137 = 5.0 * 10⁴ lb/in²
Tensile strength of Steel No. 5137 = 5.0 * 10⁴ * (0.453592 kg/lb /645.16 mm²/in²
Tensile strength of Steel No. 5137 = 35.15 kg/mm²
Area of Grunerite = 1.0 μm² = 10⁻⁶ mm²
Mass of Grunerite = area * tensile strength
mass of Grunerite = 10⁻⁶ mm² * 1.5 * 10² kg/mm² = 1.5 * 10⁻⁴ kg
Area of aluminum of same tensile strength as Grunerite = mass of Grunerite/ tensile strength of aluminum
Area of aluminum = 1.5 * 10⁻⁴ kg / 17.58 kg/mm²
Area of aluminum = 8.53 * 10⁻⁶ mm²
Area of Steel No. 5137 of same tensile strength as Grunerite = mass of Grunerite/ tensile strength of aluminum
Area of steel = 1.5 * 10⁻⁴ kg / 35.15 kg/mm² = 8.53 * 10⁻² mm²
Area of steel = 4.27 * 10⁻⁶ mm²
How can air quality be fine on one day and hazardous on the next? What
are some things that can cause a rapid change in air quality? *
Answer:
Air Current
Explanation:
Say I am in California and there is a massive fire next to me but not close enough to me to really see the fire and the next day I see no fire but theres a ton of ash in the sky, this can be due to the wind current taking the smoke from the fire into my direction and that smoke falling in my area. So basically a wind current can take the smoke from a fire into another destination and cause a rapid change in air quality in a day.