Answer:
1.989 × 10^30 kg
Explanation:
Hope this helps! :3
☁️ Answer ☁️
A solar mass is the mass of the sun. Or, more precisely, it's 1.989 x 10^30 kilograms — about 333,000 Earths. Astronomers use a solar mass as a basic unit of mass.
Dear fool, you will always be a fool.
Happy April Fools Day.
Hope it helps.
Have a nice day noona/hyung
which structure below represents the arrangement of atoms in pure copper ?.
If the heat of combustion for a specific compound is −1160.0 kJ/mol and its molar mass is 86.47 g/mol, how many grams of this compound must you burn to release 541.20 kJ of heat?
Answer:
40.34 g
Explanation:
First, we divide the heat to release by the heat of combustion to obtain the required moles of compound:
541.20 kJ/(1160.00 kJ/mol) = 0.4665 mol
So, we have to burn approximately 0.47 mol of the compound. We convert the moles to mass in grams by using the molar mass:
mass = molar mass x moles = 86.47 g/mol x 0.4665 mol = 40.34 g
Therefore, you must burn 40.34 grams of the compound to release 541.20 kJ of heat.
How many molecules are in 2.0 moles of oxygen gas
Answer:
6.02 X 1023 molecules
Explanation:
Which best replaces the question mark?
Answer:Waves.sry if this is wrong.
Explanation:
What function does this cytoplasm perform in a plant and animal cells
Answer:
It helps shape, while holding and keeping organelles in their place.
Explanation:
Answer:
it holds the cell organelles
Explanation:
You are welcome
16.A mixture of carbon dioxide and hydrogen gases contains carbon dioxide at a partial pressure of 217 mm Hg and hydrogen at a partial pressure of 703 mm Hg. What is the mole fraction of each gas in the mixture?
XCO2 =
XH2 =
x CO₂ = 0.236
x H₂ = 0.764
Further explanationGiven
P CO₂ = 217 mmHg
P H₂ = 703 mmHg
Required
The mole fraction
Solution
Dalton's law :
The total pressure of a mixture of gases is equal to the sum of the partial pressures of the component gases
Can be formulated:
P tot = P1 + P2 + P3 ....
P tot for the mixture :
= 217 mmHg + 703 mmHg
= 920 mmHg
Mole fraction of each gas :
x CO₂ = 217 mmHg/920 mmHg = 0.236
x H₂ = 703 mmHg/920 mmHg = 0.764
A silver cube with an edge length of 2.28 cm and a gold cube with an edge length of 2.75 cm are both heated to 82.8 ∘C and placed in 111.5 mL of water at 20.2 ∘C . What is the final temperature of the water when thermal equilibrium is reached?
Solution :
Given :
length of silver cube = 2.28 cm
length of gold cube = 2.75 cm
Initial temperature = 82.8°C
Volume of silver cube is
Volume [tex]$=(\text{edge length})^3$[/tex]
= [tex]$(2.28)^3$[/tex]
[tex]$= 11.8 \ cm^3$[/tex]
mass of silver cube
Mass, [tex]$m_s = \text{density} \times \text{volume} $[/tex]
= 10.5 x 11.8
= 123.9 g
Similarly, the volume of gold cube is
Volume [tex]$=(\text{edge length})^3$[/tex]
= [tex]$(2.75)^3$[/tex]
[tex]$= 20.79 \ cm^3$[/tex]
mass of gold cube
Mass, [tex]$m_g = \text{density} \times \text{volume}$[/tex]
= 19.3 x 20.79
= 401.247 g
Now
heat lost by silver and gold cube = heat gained by water
∴[tex]$m_g .c_g \Delta T + m_s .c_s \Delta T = m_w.c_w \Delta T$[/tex]
[tex]$m_g .c_g (82.8- T) + m_s .c_s (82.8- T) = m_w.c_w (T - 20.2)$[/tex]
[tex]$401.247 \times 0.1264 (82.8- T) + 123.9 \times 0.2386 (82.8- T) = 111.5 \times 4.184 (T - 20.2)$[/tex]
Now solving the equation
[tex]$50.71 (82.8- T) + 29.56 (82.8- T) = 466.51 (T - 20.2)$[/tex]
Final temperature, T = 31.27°C
According to cell theory, where do plant cells come from?
A) organelles
B) other plant cells
C) protein synthesis
D) chemical reactions
Please help!
_Li + __F2 → _LIF
How do I balance this?
Answer:
2Li + F₂ → 2LiF
Explanation:
The reaction expression is given as:
Li + F₂ → LiF
We are to balance the expression. In that case, the number of atoms on both sides of the expression must be the same.
Let use a mathematical approach to solve this problem;
Assign variables a,b and c as the coefficients that will balance the expression:
aLi + bF₂ → cLiF
Conserving Li: a = c
F: 2b = c
let a = 1, c = 1 and b = [tex]\frac{1}{2}[/tex]
Multiply through by 2;
a = 2, b = 1 and c = 2
2Li + F₂ → 2LiF
Which best describes MgO?
1)This is an ionic compound; it is named
magnesium monoxide.
2)This is a covalent compound; it is named
magnesium monoxide.
3)This is an ionic compound; it is named
magnesium oxide.
4)This is a covalent compound; it is named
magnesium oxide.
How does thermal energy affect chemical changes
Answer:
It makes chemicals hot or cold which makes chemicals react differently
Explanation:
mark me brainliest
Which element could provide one atom to make an ionic bond with oxygen?
Answer:
Magnesium
Explanation:
The element that could provide one atom to make an ionic bond with oxygen is magnesium.
Generally, most group II elements will form an ionic bond with oxygen with just one atom.
An ionic bond forms by the transfer of electrons from one specie to another.
Oxygen has a charge of 2-, to use one atom to form ionic bond with this specie, a magnesium atom with 2+ charge will bond with the specie.
This will form:
MgO
This is notable for other group II elements.
Name the four different types of Spheres belonging to Earth and give examples of Renewable resource and the Biotic factors that exist in those spheres. There are three Abiotic (Non Living) spheres and the Biotic (Living)Biosphere exist within the three of the others
Write a short summary of the renewable resources in each sphere and explain how the biosphere interacts within the three of them
Answer:
Everything in Earth's system can be placed into one of four major subsystems: land, water, living things, or air. These four subsystems are called "spheres." Specifically, they are the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air).
Explanation:
A chemistry student is recording the electric charges of some atoms. Use the results in the chart to answer the following questions.
Atom Electric Charge
Carbon −4
Nitrogen +5
Oxygen −2
Part A:
Write an equation to find the difference in electric charge between the Nitrogen atom and the Oxygen atom.
Part B:
Using the equation you wrote in Part A, what is the difference in electric charge between the two atoms?
Please help me.
Thank you!
Answer: Positive
Explanation: Just a guess
Answer:
Positive
Explanation:
When Nitrogen gas gets cold enough it can form a liquid. This liquid nitrogen is an
example of what?
A. A chemical change because it took a significant temperature drop to convert
nitrogen from gas to liquid.
B. A chemical change because the nitrogen underwent a conversion from gas to a
liquids.
C. A physical change because it was only a state change from solid to liquid.
D. A physical change because the temperature drop causes the molecules to completely rearrange.
Answer:
C.
Explanation:
Phase change is physical.
When Nitrogen gas forms a liquid is a physical change because it was only a state change from solid to liquid. Therefore, option C is correct.
What is a physical change?A physical change takes place when some of the features of the matter change but the identity of the material does not. Physical changes can be categorized as reversible and irreversible. For example, the melting of water is reversible since the melted ice can be refrozen.
Physical change can be described as a kind of change where only physical properties of matter such as solubility, color, odor, etc. can change. During physical changes in matter, there will be no chemical bonds are broken or formed between atoms in the molecule.
The chemical composition as well as the chemical nature of the material will remain unchanged while a physical change. The molecules can rearrange without changing the internal chemical composition of matter.
Therefore, changing the state of nitrogen gas is a physical change.
Learn more about physical change, here:
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Help me asap pls man
Answer:
C
Explanation:
A p orbital has the approximate shape of a pair of lobes on opposite sides of the nucleus.
Explanation:
A p orbital would have a du-bbell shape.
Options A and B show a spherical shape, which are for s orbitals.
Option D shows a double du-bbell / clover leaf shape, which is for d orbitals.
The answer is Option C.
P.S. The word is censored apparently, so be forgiving! Thanks~
What is the general form of a single replacement reaction
Answer: A. AB+C->CB+A
Explanation:
The chemical reaction includes the reactant and products. The single replacement reaction can be given as AB + C → CB + A. Thus option a is correct.
What is a single replacement reaction?A single replacement reaction is the exchange reaction that involves the substitution of a single element of the reactant with another element of the reactant species.
The reaction between zinc and copper chloride is a single replacement reaction as copper is replaced by zinc in the copper chloride compound to produce zinc chloride and copper.
Therefore, option A. AB + C → CB + A is the single replacement reaction.
Learn more about single replacement reaction here:
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How many molecules OF2 would have a mass of .132 g
1.47 × 10²¹ molecules OF₂
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional Analysis Explanation:Step 1: Define
0.132 g OF₂
Step 2: Identify Conversions
Avogadro's Number
Molar Mass of O - 16.00 g/mol
Molar Mass of F - 19.00 g/mol
Molar Mass of OF₂ - 16.00 + 2(19.00) = 54.00 g/mol
Step 3: Convert
Set up: [tex]\displaystyle 0.132 \ g \ OF_2(\frac{1 \ mol \ OF_2}{54.00 \ g \ OF_2})(\frac{6.022 \cdot 10^{23} \ molecules \ OF_2}{1 \ mol \ OF_2})[/tex]Divide/Multiply: [tex]\displaystyle 1.47204 \cdot 10^{21} \ molecules \ OF_2[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
1.47204 × 10²¹ molecules OF₂ ≈ 1.47 × 10²¹ molecules OF₂
Define energy and power then describe the relationship that exists between them.
Try for at least 3 complete sentences
Sentence starters:
Energy is.... Power is.... They are related because.....
Answer: With power and energy, power is units of energy divided by time. The same difference as distance and velocity. The units of power are watts, the units of energy are joules.
Explanation:
abcdefghijklmnopqrstuvwxyzExplanation:abcdefghijklmnopqrstuvwxyz
Please answer question #4
Answer:
F=500×3 = 1500 N
W = 1500×10 =15000 Nm
5.Calculate the number of moles of 18.0 dm3 of carbon monoxide (CO) at rtp.
Answer:
0.81mole
Explanation:
Given:
Volume of carbon monoxide = 18dm³
Unknown
Number of moles of carbon monoxide = ?
Solution:
To solve this problem;
1 mole of any gas at rtp occupies a volume of 22.4dm³
So;
x mole of carbon monoxide will occupy a volume of 18dm³ at rtp
22.4x = 18
x = [tex]\frac{18}{22.4}[/tex] = 0.81mole
The specific branch of chemistry that focuses on molecules such as salts and water that constitute non-living matter, but are still important to living things, is termed
Answer: Inorganic chemistry
Explanation:
Inorganic chemistry can be defined as the branch of chemistry which studies the behavior of the inorganic compounds. Inorganic compounds are those compounds which lack carbon hydrogen bonding. The carbon monoxide, carbon dioxide, sodium chloride and water are the examples of inorganic compounds. This branch also studies the effect of these chemical compounds on the living things. The water and salts are chemicals which regulate the chemical and physiological reactions in the body.
A rectangular block of copper metal has a mass of 1896 grams. The volume of the block is 2cm^3. From this data, what is the density of the copper?(Please show how you got this answer)
What is one effect of the Gulf Stream
Answer:
This strong current of warm water influences the climate of the east coast of Florida, keeping temperatures there warmer in the winter and cooler in the summer than the other southeastern states. Since the Gulf Stream also extends toward Europe, it warms western European countries as well.
Answer:
warm climates in northern Europe
Explanation:
I took the test in K12 and this was the answer :)
PLEASEEEE HELPPP ME WITH THISS
A person riding in the passenger seat of a car is "pushed" into the car door as the car makes a sharp left turn.
Newton's 2nd Law
Newton's 1st Law
Newtons 3rd Law
Answer:
second law
Explanation:
HELP PLS 50 POINTSSSS
Listed in the Item Bank are some key terms and expressions associated with the categories seen in the Venn Diagram. To find out more
information about items, some have more details available when you click on them. Drag and drop each item onto the proper area of the
diagram. If an item describes more than one category, be sure to place it in the overlapping space.
ITEM BANK: Move to Bottom
Carbon dioxide is a product. Carbon dioxide is a reactant. Carried out in animals.
Carried out in plants
Chemical Reaction
Oxygen is a product
Oxygen is reactant Produces usable energy sourc
Cellular Respiration
Both
Photosynthesis
Answer:
Carbon dioxide is a product (cellular respiration)
Carbon dioxide is a reactant(photosynthesis)
Carried out in animals(cellular respiration)
Carried out in plants(both)
Chemical reaction(cellular respiration)
Oxygen is a product(photosynthesis)
Oxygen is a reactant(cellular respiration)
Produces usable energy source(photosynthesis)
Your welcome!!! Plz mark brainliest.
Answer:attached is the correct answer
Explanation:
Photosynthesis and Respiration
How would you solve this?
4.Calculate the volume of 40g of Helium (He) at rtp.
Answer:
2.24dm³
Explanation:
Given parameters:
Mass of He = 40g
Unknown:
Volume of Helium = ?
Solution:
To solve this problem, we convert the given mass to number of moles.
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
molar mass of He = 4g/mol
Number of moles = [tex]\frac{4}{40}[/tex] = 0.1mole
So;
1 mole of gas at rtp occupies a volume of 22.4dm³
0.1 mole of He will occupy a volume of 0.1 x 22.4 = 2.24dm³
Please help me answer this question but in your own words!!!!
Answer:
when sodium reacts with chlorine atoms, sodium will give an electron which is negative charged to chlorine.it makes sodium(+) and chlorine (-)..then sodium will attract chlorine to form sodium chloride(NaCl)