Answers
Answer:
NH4 ClBa Br2Al4 C3Na2 OK3 PO4Ca F2Li3 NBa CO3Al2 (SO4)3Mg (NO3)2Li2 SNa2 SO4Ca (HCO3)2Ag CH3 COOZn (OH)2Explanation:
Here are all of them- your picture had #1-13, but here's #1-15!
Related Questions
explain why density is more useful for identifying a substance than either mass or volume
Answers
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.
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?
Answers
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.
Answers
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
Plz help me answer this!!
Answers
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.
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
Answers
Answer:
G, but I think that theres more than one answer
If the atomic number increases then the atomic radius should decrease right? So what’s wrong with my data
Answers
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.
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
Answers
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:
periodic table of elements
Answers
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
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
Answers
Answer:
b.)
Explanation:
Because you would have a different weight on the moon because of it's low gravity
Help easy valence electrons question (picture)
Answers
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
An independent variable is....
A: What we measure
B: What we change
C: What stays the same
D: What we conclude
Answers
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
what is the physical state of caesium at 35°c? Explain why
Answers
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?
Answers
Answer:
Mother board, it is essentially the brain
Explanation:
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
Answers
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
C - chemical change
P- physical change
(Pls help me)
Answers
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:
pleasee help ASAP
will mark brainliest!
Answers
Answer:
question 1- is B
question 2- is A
*I hope this helps you guys out!
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
Answers
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
Answers
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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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
Answers
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.
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
Answers
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
For the water, what color is the oxygen molecule?
Answers
Answer:
red
1: The SCP/E-water molecule: oxygen atom (red color) and hydrogen atoms (white color).
Explanation:
What is Cd2+ and F1- together as a formula
Answers
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
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
Answers
Answer:
,b dksb dfsj kdhfsu dfsh khfs fshk
Explanation:
Which of the following subatomic particles are found surrounding the nucleus and have a negative charge?
F negatrons
G neutrons
H protons
J electrons
Answers
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.Air that has been removed from a bell jar will NOT allow _____________ waves to travel through the jar. Question 4 options: sound light water
Answers
Answer:
Sound.
Explanation:
Sound requires a medium such as air to travel.
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.
Answers
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.
What are the causes of soil erosion
Answers
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
T/F: If the number of protons changes from 7 to 9, the element changes
Answers
formula equation is more informative than a word equation why
Answers
Answer:
yes
Explanation:
this is because the formula equation shows the details on how they solved the equation
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 !
Answers
Answer:
c.magnesium and zinc
Explanation:
you're welcome