Answer:
124225.91 g of Na₃PO₄
Explanation:
From the question given above, the following data were obtained:
Number of atoms of Na₃PO₄ = 4.56×10²⁶ atoms
Mass of Na₃PO₄ =?
From Avogadro's hypothesis,
6.02×10²³ atoms = 1 mole of Na₃PO₄
Next, we shall determine the mass of 1 mole of Na₃PO₄. This can be obtained as follow:
1 mole of Na₃PO₄ = (23×3) + 31 + (16×4)
= 69 + 31 + 64
= 164 g
Thus,
6.02×10²³ atoms = 164 g of Na₃PO₄
Finally, we shall determine the mass of Na₃PO₄ that contains 4.56×10²⁶ atoms. This can be obtained as follow:
6.02×10²³ atoms = 164 g of Na₃PO₄
Therefore,
4.56×10²⁶ atoms = (4.56×10²⁶ × 164)/6.02×10²³
4.56×10²⁶ atoms = 124225.91 g of Na₃PO₄
Therefore, 124225.91 g of Na₃PO₄ contains 4.56×10²⁶ atoms
pls help me I have only 2 minutes left person gets brainly
in the reaction 2Na + CI2 --> 2NaCI the products are
Answer:
The products in this equation are CI2
Explanation:
The reasoning as to why the CI2 is considered the products is because it is on the right side of the plus sign, and on the left side is called reactants.
A bond formed when atoms share electrons is a(n) __________.
a. crystal lattice
b. molecule
c. ion
d. ionic bond
e. chemical bond
f. covalent bond
Answer:
I think it is a covalent bon
if you are correct you get a brainless
Tarek would like to germinate pumpkin seeds for his science project. He wraps the seeds in a dry paper towel and places them on the windowsill. Tarek waits, but the seeds will not grow. What conditions should Tarek have used to germinate the seeds? (2 points)
a
The paper towel should be wet, and the seeds should be placed in a dark place.
b
The dry paper towel should be placed in a pot filled with soil.
c
The paper towel should be dry and transparent.
d
The seeds should be placed in a dark place.
Answer:
A.
Explanation:
❤️
Answer: it’s A. The paper towel should be wet, and the seeds should be placed in a dark place.
Explanation: I hope this helps!
A block of concrete has a mass of 5100 g and a volume of 2500 cm3 . Calculate the density.
Answer:
2.04 g/cm3
Explanation:
Density = mass ÷ volume
= 5100 ÷ 2500
=2.04 g/cm3
A solution of pH 7 has
Group of answer choices
the same concentration of H+ and OH‑
more OH- than H+
no H+ and no OH-
more H+ than OH-
Answer: same concentration
Explanation:
H+ makes it more acidic, OH- makes is more basic. 7 is neutral so it has the same amount of both.
In a lab, a scientist calculate he should produce 12.3 grams of product in his experiment. When he is finished collecting his product it weighs 11.0 grams. What is his percent yield?
Answer:
Option D.
Explanation:
Percentage yield = Actual yield / Theoretical yield * 100%
Actual yield = 11.0 grams
Theoretical yield = 12.3 grams
Percentage yield = 11.0 / 12.3 * 100
Percentage yield = 89.43%
Use the equation for the combustion of butane: 2 C,H, + 13 0,8 CO, +10 H,O 4. If you had 99.08g of butane react, how many grams of carbon dioxide would be produced? 5. If you had 290.38 grams of butane, how many grams of water would be produced? 6. How many grams of oxygen gas are needed for the complete combustion of 307.47 grams of butane? 7. How many grams of oxygen would be required if you had 160.87 grams of butane?
Answer:
See explanation
Explanation:
Equation of the reaction;
C4H10 + 13/2 O2-----> 4CO2 + 5H2O
Number of moles of Butane = 99.08g/58 g/mol = 1.71 moles
1 mole of Butane yields 4 moles of CO2
1.71 moles of Butane yields 1.71 * 4 = 6.84 moles Of CO2
Mass of CO2 = 6.84 moles Of CO2 * 44 g/mol = 300.96 g
5. Number of moles of butane = 290.38 g/58 g/mol = 5 moles
1 mole of butane yields 5 moles of water
5 moles of butane yields 5 * 5 = 25 moles of water
Mass of water = 25 moles of water * 18 g/mol = 450 g of water
6. Number of moles of butane = 307.47g/58 g/mol = 5.3 moles
1 mole of butane reacts with 6.5 moles of oxygen
5.3 moles of butane reacts with 5.3 * 6.5 = 34.45 moles of oxygen
Mass of oxygen = 34.45 moles of oxygen * 32 g/mol = 1102.4 g
7. Number of moles of butane = 160.87/58 g/mol = 2.8 moles
1 mole of butane reacts with 6.5 moles of oxygen
2.8 moles of butane reacts with 2.8 * 6.5 = 18.2 moles of oxygen
Mass of oxygen = 18.2 moles of oxygen * 32 g/mol = 582.4 g
HELP ME PLEASE (brainliest)
Answer: i would say D or the last one.
Explanation: According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants. The law of conservation of mass is useful for a number of calculations and can be used to solve for unknown masses, such the amount of gas consumed or produced during a reaction.
Hope this helps :) Can u plz mark me branliest
The molar mass of CO2 is 44g/mol. How many grams are in 3 mol CO,?
Answer:
We assume you are converting between moles CO2 and gram. You can view more details on each measurement unit: molecular weight of CO2 or grams This compound is also known as Carbon Dioxide. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles CO2, or 44.0095 grams.
Answer:
Assuming the question was about 3 mol CO2 - it's 132g. Assuming it's about CO - it's 84g.
Explanation:
The molar mass of X means "a mole of X weighs that".
So 1 mol CO2 weighs 44g, so 3 moles will weigh three times that - 132g.
Now, with CO, we need to compute the molar mass of CO. One particle of CO is comprised of 2 atoms - a Carbon atom and an Oxygen atom, with molar masses ~12g and ~16g respectively. That brings us to molar mass of CO of 28g and the mass of 3 mol CO of 28g*3 = 84g
The dividing line________ the mantle and the crust.
Please help due tomorrow.
This is a fill in the blank
Answer:
The dividing line between the mantle and the crust.
Which of the following is a unit of mass?
A.
newton
B.
kilogram
C.
meter
D.
tesla
Answer:
B. kilogram
Explanation:
The basic SI unit of mass is the kilogram.
:))
<3
cuantos gramos de hidróxido de calcio se necesitan para preparar 875ml de solución al 2M
Answer:
129,66 g
Explanation:
Desde,
Número de moles = concentración * volumen
concentración = 2 M
volumen = 875 ml
Número de lunares = 2 * 875/1000
Número de lunares = 1,75 moles
Número de moles = masa / masa molar
masa molar de hidróxido de calcio = 74.093 g / mol
1,75 moles = masa / 74,093 g / mol
masa = 1,75 moles * 74,093 g / mol
masa = 129,66 g
define the acid rain for class 10 .???
Answer: Acid rain is caused by a chemical reaction that begins when compounds such as sulphur dioxide and oxides of nitrogen are released into the air. These substances can rise very high up into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants called acid rain.
Explanation:
what is the color of the flame when magnesium burns in air
Answer:
Will u give me brainliest
white
In its pure form, it is silvery white, and relatively soft. It burns in air with a brilliant white light, and for this reason is often used in flares and fireworks. Magnesium is used in disposable flash bulbs to generate light for photography, but this use has been largely supplanted by other sources of illumination
Does anyone know the ones that are blank
Answer:
yeah whats it asking for
Explanation:
What atomic species are present in all hydrocarbons?
Answer:
Hydrogen
Carbon (iv) oxide
There are two reactants
in a chemical equation
and one product. The
mass of the product is
30g. The mass of the
first reactant is 17g.
What must the mass of
the second reactant be,
if the equation is to
follow the law of
conservation of mass?
PLEASE HELP ME
Answer:
13g
Explanation:
The law of conversation of matter tells us that in a chemical reaction, matter is never created or destroyed, it's simply converted from one form to another. So the mass of reactants should always equal the mass of the products in a chemical reaction.
Therefore, if the total mass of the products is 30g, that means that the reactants have a mass of 17g + the other reactant to = 30g.
30g - 17g = 13g
the volume of gas at a stp is ..................l
Answer:
22.4 L
Explanation:
At STP, one mole of gas occupies 22.4 L of volume (molar volume). Note the International Union of Pure and Applied Chemistry (IUPAC) applies a more stringent standard of STP as a temperature of 273.15 K (0 °C, 32 °F) and an absolute pressure of exactly 100,000 Pa (1 bar, 14.5 psi, 0.98692 atm).
Answer:5.3 a
letr
Explanation:
Which of the following is the correct calculation for determining the density of an object with a mass of 54 g and a volume of 6mL
Answer:
d=m/v=9
Explanation:
HELPP ILL GUVE YOU LOTS OF POINTS EVERYTHING U WANT I REALLY NEED HELP
Answer:
To make this easier I'll label the left column 1, 2, 3, and 4. and the right column A, B, C, and D.
1 goes to B
2 goes to A
3 goes to C
4 goes to D
Explanation:
1. A ship goes out of sight on the horizon because it goes too far around the curve of the earth to see anymore.
2. We have day and night because the earth spins certain sides of itself to face the sun and other sides to face away from the sun (aka day and night)
3. We have summer and winter because Earth's axis is tilted. Part of the Earth tilts closer to the sun when summer is here, and the other part tilts away from the sun when it's winter. (This is why it's summer in North America, when it's winter in Australia).
4. A year is measured by how long it takes a planet to orbit it's star. A year for Earth is 365 days because it takes 365 days for earth to orbit around the sun.
Santos and Lüderitz are the same distance from the equator, and both cities are near the ocean. The air temperature in Lüderitz is colder than the air temperature in Santos. What causes the air temperature in these places to be different? Explain what causes the difference as completely as you can.
Please help i need answers A.S.A.P
Answer:
pies
Explanation:
i am confused and cant find a explanation i am sad
Santos and Luderitz have a difference in the temperature despite being at the same distance from the equator because of the oceanic currents, and the topographical factors.
What are oceanic currents?Oceanic currents are the directional movement of the oceanic and the seawater by the Coriolis Effect, density, sea level, and gravity, these movements affect the temperature of the area.
The sea level and the oceanic currents play a role in determining the temperature of the region as it affects the humidity, warm and cold wind, and environmental and other topographical factors.
Therefore, the difference in oceanic currents results in different temperatures.
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1- DILUTIONS What will the volume be of a solution created using 120 mL of 4.50 M stock solution if the final molarity needs to be 2.00 M? (answer in liters)
Answer: 0.27 L
Explanation:
GIVING 38 POINTS AWAY PLEASE HELP ME WITH BOTH QUESTIONS!!!!
Answer:
C
B
Explanation:
throwing cotton balls causes the person to blink.
and Its not an allergic reaction so it's more of stomach pain that sneezing
Answer:
it should be c for the first one then b for the second one
Explanation:
hope it helps :)
What is the molecular formula for a compound that is 33.38% sulfur and 66.62% oxygen and has a molar mass of 192.14g?
What is the molecular formula for a compound that is 26.37 % carbon, 5.541% hydrogen, 52.70 % oxygen and 15.38% nitrogen and has a molar mass of 182.16g?
Explanation:
HOPE IT WILL HELP YOU TO SOLVE YOUR PROBLEM
The molecular formula for a compound that is 33.38% sulfur and 66.62% oxygen and has a molar mass of 192.14 g is SO₄, and the molecular formula for a compound that is 26.37% carbon, 5.541% hydrogen, 52.70% oxygen, and 15.38% nitrogen and has a molar mass of 182.16 g is C₉H₈NO₃.
What is the significance of the molecular formula?The molecular formula of a compound is a way to represent the number and types of atoms that make up a molecule and is used to identify and distinguish between different compounds, which is important in chemistry and biochemistry as it can help predict the compound's physical and chemical properties.
Hence, the molecular formula for a compound that is 33.38% sulfur and 66.62% oxygen and has a molar mass of 192.14 g is SO₄, and the molecular formula for a compound that is 26.37% carbon, 5.541% hydrogen, 52.70% oxygen, and 15.38% nitrogen and has a molar mass of 182.16 g is C₉H₈NO₃.
Learn more about the molecular formula here.
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Question 6
Review
Which sample, when dissolved in 1.0 liter of water, produces a solution with the highest boiling point?
A
0.1 mole Ki
B
0.2 mole KI
0.1 mole MgCl2
0.2 mole MgCl2
Submit Answer
Zoom: Standa
Answer:
0.2 mol MgCl₂
Explanation:
ΔT = Kb . m . i
ΔT = Boiling T° of solution - Boiling T° of pure solvent
Kb is a constant. For water is 0.52 °C/m
m = molality (moles of solute in 1kg of solvent)
i = numbers of ions dissolved.
That's all the elements for the formula to determine the elevation of boiling point.
We assume, that molality will be at least the same for salts with 0.1 moles and 0.2 moles. For 0.1 mol :
1L of water contains 1000g of it, so we can also say that 1kg of water is contained in 1 L of water. Remember that density is 1g/mL or 1kg/L
So concentrations for 0.1 moles are, 0.1 mol/kg and for 0.2moles, 0.2 mol/kg. Let's dissociate the salts to determine i:
KI → K⁺ + Cl⁻ i = 2
MgCl₂ → Mg²⁺ + 2Cl⁻ i = 3
The highest difference will be at the 0.2 moles of MgCl₂, so that will be the sample that produces a solution with the highest boiling point.
Boiling T° of solution = 0.52 °C/m . 0.1m . 2 + 100°C = 100.10°C
Boiling T° of solution = 0.52 °C/m . 0.2m . 2 + 100°C = 100.20°C
Boiling T° of solution = 0.52 °C/m . 0.1m . 3 + 100°C = 100.15°C
Boiling T° of solution = 0.52 °C/m . 0.2m . 3 + 100°C = 100.31°C
aerobic cellular respiration requires an adequate supply of
Answer:
oxygen ?
Explanation:
not sure but I think so
Aerobic cellular respiration requires an adequate supply of oxygen. In the presence of oxygen, the cell completely oxidised the glucose molecule to form ATP.
What is cellular respiration?In cellular respiration, the cell takes glucose and breaks it down to form energy. Cellular respiration is of two types: aerobic respiration and anaerobic respiration.
In aerobic respiration, the cell requires oxygen. Due to the presence of oxygen, the complete oxidation of glucose takes place. Glucose is converted into pyruvic acid and then enters the Krebs cycle and the electron transport chain to make ATP.
In the aerobic cellular respiration process, the maximum amount of ATP is derived. In anaerobic respiration, the cell performs respiration without the presence of oxygen. An example is glycolysis.
In this glycolysis process, the complete oxidation of glucose does not take place. In the absence of oxygen from pyruvate, lactic acid and ethanol are produced. This is called fermentation.
Hence, for aerobic cellular respiration, oxygen is required.
To learn more about cellular expression, refer to the following link:
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Question 10 I need help
2. A tow-line with a tension of 1200 N at 35° is needed to tow the 1350 kg
trailer at a constant speed. What is the uk?
Answer:
i don't know
sorry i would help but i don't know
Explanation:
hey pleaseeeeeeeeeeeeeeeeeeeeeeee
Answer: B
Explanation:
Answer:
b
Explanation: