Answer:
It is a Mixture
Explanation:
It's a mixture because it was a substance made from mixing other substances together. And when the magnet went over the powder, the iron is lifted and not the sulfur. So the different parts of it can be separated by any physical means that allows the parts to seen separated
Answer:
its is a mixture
Explanation: because I did the question
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
T/F: If the number of protons changes from 7 to 9, the element changes
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
What is Cd2+ and F1- together as a formula
Answer:
i am not sure tho
Explanation:
Cd ²+ + F¹- = CdF2
F fluor is a non metal so he takes the electons that Cd gives so if Vd has to give 2 electrons and F can take only 1, there has to be 2 F atoms so all the electrona can be neutral and in ionisation
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:
what is the physical state of caesium at 35°c? Explain why
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 are the causes of soil erosion
Answer:
deforestation
Explanation:
our trees are very useful, it holds and keep our soil compact. so if deforestation takes place chances of flooding becomes high , and having lots of water softens soil and may cause erosin
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
periodic table of elements
Vertical Column is a group
Horizontal is Period
Aliki earth metals is a group
Lithium- Neon is both
Based on electrons are both
Number of electron shells is both
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
1. What part of the human body has the same role as the processor on a computer?
2. What part of the human body has the same job as the wires and circuits in a computer?
Answer:
Mother board, it is essentially the brain
Explanation:
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.
An independent variable is....
A: What we measure
B: What we change
C: What stays the same
D: What we conclude
Answer:
B - What we change
Explanation:
Dependent Variable - What we measure
Control Variable - what stays the same
Conclusion - what we conclude
Hope this can Help!
:D
Can someone help mee pleaseeeee please!
Answer:
im sorry dude, just trying to complete my daily challenge
Explanation:
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:
helpp!!
What pair of elements is most likely to form a metallic bond?
a.sodium and arsenic
b.lithium and oxygen
c.magnesium and zinc
d. calcium and selenium
who ever answers gets the branliest !
Answer:
c.magnesium and zinc
Explanation:
you're welcome
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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balance equation for complete combustion of butane
During the apollo missions,an astronaut took a golf ball to the moon. He placed it on the moon’s surface and hit the ball with a golf club. Which property of the golf ball was different on the moon than on earth?
A.) density
B.) mass
C.) volume
D.) weight
Answer:
b.)
Explanation:
Because you would have a different weight on the moon because of it's low gravity
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:
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
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.
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.
A car is traveling at 50mph. How long will it take the car to travel 300 miles?
Answer:
6 hours
Explanation:
If it is traveling at 50mph and needs to reah 300 miles, to figure this problem out you would want to divide 300 by 50 to get 6 hours. So it will take six hours until the car travels 300 miles
Hope this helps.
Answer: A car travels at a rate of 50 miles per hour. how long will it take the car to travel 300 miles?
Explanation: .
Applying the distance formula:
d = rt
where
d is distance (300 miles)
r is rate (50 mph)
t is time (hours)
.
300 = 30t
300/30 = t
10 hours = t
According to Coulomb’s law, what will happen to the electric force between
two identical negative charges as they move closer together?
A. Fe will become negative and decrease in magnitude.
O B. Fe will stay negative and increase in magnitude.
C. Fe will stay positive and increase in magnitude,
D. Fe will become positive and decrease in magnitude.
Answer:
C. Fe will stay positive and increase in magnitude.
Explanation:
Coulomb's law states that the force of attraction of repulsion between two charged particles is directly proportional to the magnitude of their charges and inversely proportional to the square of the distance of separation between them.
This means that if the size of the charges are large, the force acting on them will be large as well. Also if the distance between the two charges increases the force decreases. However, the force increases when the distance of separation decreases.
Like charges repel, therefore, two negative charges brought together will repel each other, and the distance between the two charges decreases, the force will increase in magnitude. Forces of repulsion are considered positive, therefore, the force, Fe, will stay positive and increase in magnitude.
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
Can someone help me click the picture
Answer:
A product
B coefficient
C script
D rectant
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:
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