How many molecules are in 450.0 grams of aluminum fluoride (AIF3)?
Answer:
5.3586262014272155
Explanation:
You have to go from grams --> moles --> molecules. You can find the equation online.
First you have to find the molar mass of AlF3 which is 83.98 g/mol.
To convert it to moles you simply
450.0 grams × [tex]\frac{1 mol}{83.98 grams}[/tex] = 5.358 mol
To convert mol to molecules: (multiply by Avogadros # = 6.022*10^23)
5.358 mol × [tex]\frac{6.022*10^2^3}{1mol}[/tex] = [tex]3.23 *10^{24}[/tex]
How many grams of HCl(aq) are required to react completely with 1.25g of Zn(s) to form ZnCl2(aq) and H2
1.39 g HCl
Explanation:
The balanced chemical equation for this reaction is given by
Zn(s) + 2HCl(aq) ---> ZnCl2(aq) + H2(g)
Convert the # of grams of Zn to moles:
1.25 g Zn × (1 mol Zn/65.38 g Zn) = 0.0191 mol Zn
Use the molar ratio to find the # of moles of HCl needed to react completely with the given amount of Zn:
0.0191 mol Zn × (2 mol HCl/1 mol Zn) = 0.0382 mol HCl
Convert this amount to grams:
0.0382 mol HCl × (36.458 g HCl/1 mol HCl) = 1.39 g HCl
Which element is more reactive, Almuminum (Al) or Chlorine (Cl)?
Cuál es la Masa en Gramos de 3,5 moles de H2O?
Answer question in picture
(D)
Explanation:
On the left side two molecules, each made of 2 grays and 3 blues, which suggests that only (D) offers the right combination: 2 Al atoms and 3 O atoms that make up Al2O3.
what are the key components of nitrogen cycle
Answer:
Important processes in the nitrogen cycle include fixation, ammonification, nitrification, and denitrification.
Explanation:
The key components of nitrogen cycle are :nitrogen fixation, nitrification, assimilation, ammonification and denitrification.
What is nitrogen cycle?It is a bio-geochemical cycle through which nitrogen is converted into multiple chemical forms when it circulates among atmospheric, terrestrial and marine ecosystems .
Conversion of nitrogen is carried out through physical and biological processes.Nitrogen cycle is important as it affects of ecosystem processes like primary production and decomposition.
Conversion of nitrogen gas to nitrates and nitrites through atmospheric , industrial and biological processes is called nitrogen fixation. Nitrogen is assimilated in plants in form of nitrates or ammonium forms.When an animal or plant dies the nitrogen in organic form is converted to ammonium which is mineralization.
Learn more about nitrogen cycle,here:
https://brainly.com/question/28096816
#SPJ2
The pressure of 25.0 L is increased from 11.0 kPa to 16.0 kPa. What is the new pressure
Answer:
Explanation:
What does a strong nuclear force do in an atom?
It repels electrons from other electrons.
It repels protons from other protons.
It attracts protons and neutrons.
It attracts protons and electrons.
Answer:
It Attracts Protons And Neutrons
Explanation:
The strong nuclear force can be regarded as strong interaction. It is force which is strong enough to overcomes repulsive force that exist between two positively charged protons, and this give room for protons and neutrons to stick together in small space.This strong interaction can as well be regarded as attractive force and it binds elementary particles known as quarks together and it forms the "nucleons " which is (protons and neutrons) . It should be noted that strong nuclear force Attracts Protons And Neutrons in an atom
Answer:
c
Explanation:
edge
How many degrees would the temperature of a 45.0 g piece of iron increase if 7,680 J of energy are applied to it? (The specific heat of iron is 0.449 J/g°C)
Question 10 options:
76.6°C
155,000°C
380°C
0.0130°C
Answer:
380
Explanation:
Q=mco
Q is the energy
M is mass
C is specific heat
O is increased in temperature
Thermal energy is the energy associated with
a. electric fields
b. being stored in chemical bonds
c. the pull of gravity
d. temperature
Answer:
D is the answer
Explanation:
Because thermal is Heat Energy
I hope it's right
Thermal energy is the energy associated with temperature. The correct option is d.
Thermal energy is the energy associated with a substance's or system's temperature. It is a type of kinetic energy that results from the random motion of tiny particles.
The higher the temperature, the larger the average kinetic energy of the particles and the bigger the amount of thermal energy present.
Heat transmission, phase shifts (such as melting or boiling), and the general thermal behaviour of materials all require thermal energy.
It differs from other types of energy including electrical energy (option a), chemical potential energy (option b), and gravitational potential energy (option c).
Thus, the correct option is d.
For more details regarding thermal energy, visit:
https://brainly.com/question/3022807
#SPJ7
Write a balanced equation out of these chemicals
Answer:
2Na + 2H20--> 2NaOH+H2
............. this is the ans
Why do you think the Sun is not at the center of Mercury’s orbit?
Answer:
Like Venus, Mercury orbits the Sun within Earth's orbit as an inferior planet, and its apparent distance from the Sun as viewed from Earth never exceeds 28°. This proximity to the Sun means the planet can only be seen near the western horizon after sunset or the eastern horizon before sunrise, usually in twilight.
Explanation:
Which of the following is a property of water? (5 points)
Question 13 options:
1)
It can freeze very fast.
2)
It has low heat capacity.
3)
It exists in all three states on Earth.
4)
It repels other water molecules.
I believe the answer is number 1 but I could be wrong ><
Water is a substance composed of hydrogen and oxygen and exists in solid, liquid and gaseous state in nature.
What is hydrogen?Hydrogen is "a colourless, odourless, tasteless, flammable gaseous substance that is the simplest member of the family of chemical elements".
What is oxygen?Oxygen is "a non-metallic chemical element of Group 16 (VIa) of the periodic table".
What is solid?Solid is a state of matter in which atoms or molecules are tightly packed.
What is liquid?Liquid is a state of matter in which atoms are held loosely and are free to flow.
What is gas?Gas is a state of matter which has no fixed shape and volume.
Hence, water exists in three states of matter.
To learn more about water here
https://brainly.com/question/23725803
#SPJ2
What is the difference in a transverse and a longitudinal wave?
Group of answer choices
Transverse waves are bigger than longitudinal waves
A transverse wave has crests and troughs and a longitudinal has compressions and rarefactions.
Transverse waves are sound waves and longitudinal waves are light waves.
Answer:
A transverse wave has crests and troughs and a longitudinal has compressions and rarefactions.
Structures and Forces - What is force and external forces.
Question 1) Jacob and Ravleen are moving furniture. They need to move the filing cabinet over 6 feet and it is very heavy. Jacob wants to apply force and push it by putting his hands on point A because he thinks it would be easier to move it from the top as there is less weight on the top. Ravleen says it's better to push at point B because the center of gravity is lower. Which person is correct and EXPLAIN why and what may happen if it is pushed in the wrong spot.
Answer:
The restoring force that prevents the furniture from tipping over when pushing the furniture towards the right, F= W × D
Where;
W = The weight of the furniture
D = The horizontal distance from the center of gravity of the furniture, CG and the to the lower right corner of the furniture
Given that A > D, for the furniture to tip over when pushing above the CG, we have;
F1 × A ≤ W × D
∴ F1 << W or for a force much smaller than W, the weight of the furniture applied above the center of gravity, the furniture will tip over
However when the force F2 is applied, where C < D, we have for no tipping over;
F2 × C ≤ W × D, therefore, given that C < D, when a force much higher than the weight, W, is applied at F2, the furniture will remain upright
Therefore, it is better push at a point lower than or equal to the center of gravity, whereby the point B is lower than the center of gravity, it is better to push at point B, Ravleen is correct and it is better to push at point B because the center of gravity is lower
If the furniture is pushed at the wrong spot it may tip over
Please see attached drawing
Explanation:
URGENT!!!
Which statement explains why an increase in molality increases the boiling point of a solution? The addition of solute decreases the solvent’s vapor pressure. A higher temperature must then be applied to overcome the change. The addition of solute increases the solvent’s vapor pressure. A higher temperature must then be applied to overcome the change. The addition of solute increases the solvent’s ability to boil. The solute’s molecules repel the solvent’s molecules, giving them higher binding energy and hence the need for higher temperature.
Answer:
the addition to solute decreases the solvent's vapor pressure. a temperature must then be applied to overcome the change
Explanation:
Answer:
long story short: A
Explanation:
If 10ml of 1.00M HCI(aq) neutralized 30 ml of an NaOH solution. What was the molarity of the Na OH solution?
Explanation:
plz mark as brainlist///////
Mendel crossed tall pea plants with short pea plants. the offspring were all tall plants.
1. Which allele is recessive?
2. Which allele is dominant?

please hurry

Answer:
1. Allele for shortness (t)
2. Allele for tallness (T)
Explanation:
Gregor Mendel performed numerous experiments using pea plants (Pisium sativum). He tested the height traits of pea plants by crossing tall pea plants (TT) and short pea plants (tt) to obtain offsprings that were all tall (Tt) in the first filial generation (F1).
This is possible because the allele for tallness is DOMINANT while the allele for shortness is RECESSIVE. This means that tallness allele (T) will mask the phenotypic expression of shortness allele (t) when in an heterozygous state (Tt) as in the F1 generation.
Agustina was standing on the edge of a cliff of unknown height holding a bowling ball. She wanted to find the height of the cliff. She worked with Maite to time the how long the bowling took to fall to the bottom of the cliff. Maite timed the drop at 9.4 seconds on each of their 10 trials. The bowling ball started at rest on each of the trials. What distance did the bowling ball fall in each trial?
Answer:
433 m
Explanation:
Since the fall represents motion under gravity, we use the equation
s = ut - 1/2gt² where s = height of cliff or distance bowling ball falls through, u = initial velocity of bowling ball = 0 m/s(since it starts from rest), t = time = 9.4 s and g = acceleration due to gravity = -9.8 m/s².
So, substituting the values of the variables into the equation, we have
s = 0 m/s × 9.4 s - 1/2 × 9.8 m/s² × (9.4 s)²
s = 0 m - 1/2 × -9.8 m/s² × 88.36 s²
s = 1/2(865.928 m)
s = 432.964
s ≅ 433 m
Anyone know this question
Answer:
12
my advice is split the equation into 2 and write on each side how many atoms of each element are there and it will be easier to balance.
Somebody please help this is due in 30 minutes! (picture is attached)
44.5 g Al2(SO4)3
Explanation:
# moles Ba(NO3)2 = (0.543M)(0.717 L)
= 0.389 mol Ba(NO3)2
Now we use the molar ratios,
0.389 mol Ba(NO3)2 ×(1 mol Al2(SO4)3/3 mol Ba(NO3)2)
= 0.130 mol Al2(SO4)3
0.130 mol Al2(SO4)3 × (342.15 g Al2(SO4)3/(1 mol Al2(SO4)3)
= 44.5 g Al2(SO4)3
What is the radius of this circle if the circumference is 18 pi cm?
Answer: 2.86 inches
Explanation: To find the radius, then, we insert 18 in for the circumference. So 18=2∏r. Solving for r gives 9/∏, or approximately 2.86 inches.
Answer:
2.86 inches
Explanation:
How many formula units are in 25.4 g of MgCl2?
Answer: 1.58 x [tex]10^{23}[/tex]
Explanation:
1 mole of magnesium chloride has a mass of 95.211 g and contains 6.022⋅[tex]10^{23}[/tex]formula units of magnesium chloride, you can say that,
25.0 g x (6.022 x [tex]10^{23}[/tex] form units MgCl2) /95.211 = 1.58 x [tex]10^{23}[/tex]
What set of coefficients will balance the chemical equation: _NaBr (aq) + _H3PO4 (aq) → _Na3PO4(aq) + _HBr (aq)
A. 3,1,1,3
B. 1,2,3,1
C. 3,1,3,1
D. 1,1,3,3
The Balanced chemical equation for above reaction will be :
[tex] \small{ \mathrm{3NaBr + H_3PO_4 \rightarrow Na_3PO_4 + 3HBr}}[/tex]
The Coefficients will be :
[tex]NaBr - 3[/tex][tex]H_3PO_4 - 1[/tex][tex]Na_3PO_4 - 1[/tex][tex]HBr - 3 [/tex]So, Correct option is :
A. 3, 1, 1, 3
_____________________________
[tex]\mathrm{ \#TeeNForeveR}[/tex]
What happens when two plates move alongside each other?
Answer:When two plates travel in the same direction, they intersect or collide. A convergent boundary is a collision between two plates that are traveling in the same direction. Large damaging earthquakes occur from the collision. The forming of massive folded mountains occurs as two continental plates collide.
Explanation:
Which is the correct chemical formula for Pentacarbon Tetraphosphide
Answer:
C5P4
Explanation:
the answer is C5P4 because penta is 5 and tetra is 4
Na+ and P-3 whats the formula and whats the name of it
Answer:
sodium phosphide!!!!!!!!!!!!!!!
Need help on this question asap please please I’m going to really appreciate it
Answer:
0.11 moles
Explanation:
The equation of the reaction is;
2SO2 + O2 ------>2SO3
Number of moles of O2 in 3.42 g = 3.42g/32 g/mol = 0.11 moles
Hence, 0.11 moles of O2 is consumed when 3.42 g of O2 reacts with SO2 to form SO3.
Calculate the molarity of a solution that contains 0.75 moles of lithium fluoride, LiF, in a 65 mL solution.
The molarity (M) of a solution is 11.5 M that contains 0.75 moles of lithium fluoride, LiF in a 65 ml of solution.
What is Molarity ?Molarity (M) is defined as the number of moles of solute dissolved in 1L of solution. Molarity is also known as Molar concentration. The S.I Unit of Molarity is molar (M) or mol/L.
How to find molarity of a solution ?Molarity (M) = [tex]\frac{\text{Number of moles of solute}}{\text{Volume of solution (in liters)}}[/tex]
From the above definition it is clear that the volume of solution is in liter. In question the volume of solution is given in ml.
So, convert 65 ml into l.
65 ml = [tex]\frac{65}{1000}[/tex] = 0.065 l
Now, put the values in above formula, we get that
(M) = [tex]\frac{0.75}{0.065}[/tex] = 11.5 M
Thus, the molarity of a solution is 11.5 M that contains 0.75 moles of lithium fluoride, LiF in a 65 ml of solution.
Learn more about Molarity here: https://brainly.com/question/14469428
#SPJ2
What is the difference between Mitosis and Meiosis?