Answer:
The answer is
4.5 × 10²²Explanation:
To find the number of atoms of titanium , given it's number of moles we use the formula
N = n × Lwhere n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question
n = 0.075 mol
We have
N = 0.075 × 6.02 × 10²³
We have the final answer as
4.5 × 10²²Hope this helps you
What is the last step in the scientific method?
A. Make an observation
B. Form a hypothesis
C. Test your hypothesis
D. Form a conclusion
Answer:
D
Explanation:
Because do all of that and then you do a conclusion
Measure of the energy
released during an
earthquake.
Answer:
The magnitude of an earthquake, usually expressed by the Richter Scale, is a measure of the amplitude of the seismic waves
Explanation: The moment magnitude of an earthquake is a measure of the amount of energy released - an amount that can be estimated from seismograph readings
What is the density of an objects with a volume of 4.3 mL and a mass of 8.32g
Answer:
The answer is 1.93 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume}\\[/tex]
From the question
mass = 8.32 g
volume = 4.3 mL
So we have
[tex]density = \frac{8.32}{4.3} \\ = 1.934883720...[/tex]
We have the final answer as
1.93 g/mLHope this helps you
I’m stuckkkkkk please help
Answer:
A
Explanation:
I think...........maybe
Weighted averages, help please
Answer:
Average atomic mass of Cl = 35.48 amu
Average atomic mass of B = 10.8 amu
Average atomic mass of Ag = 107.96 amu
Explanation:
1)
Given data:
Abundance of Cl-35 = 75.8%
Abundance of Cl-37 = 24.2%
Average atomic mass = ?
Solution:
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) / 100
Average atomic mass = (75.8×35)+(24.2×37) /100
Average atomic mass = 2653 + 895.4 / 100
Average atomic mass = 3548.4 / 100
Average atomic mass = 35.48 amu
2)
Given data:
Abundance of B-10 = 19.8%
Abundance of B-11 = 80.2%
Average atomic mass = ?
Solution:
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) / 100
Average atomic mass = (19.8×10)+(80.2×11) /100
Average atomic mass = 198 +882.2 / 100
Average atomic mass = 1080.2 / 100
Average atomic mass = 10.8 amu
3)
Given data:
Abundance of Ag-107 = 52%
Abundance of Ag-109 = 48%
Average atomic mass = ?
Solution:
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) / 100
Average atomic mass = (52×107)+(48×109) /100
Average atomic mass = 5564 +5232 / 100
Average atomic mass = 10796 / 100
Average atomic mass = 107.96 amu
Nuclear power plants are very hazardous because their fuel and waste products are highly
radioactive.
a True
b. false
Answer:
the answer is A
Explanation:
This is very much true as seen by the fact that the people that work at nuclear power plants usually have to wear radiation suits.
CH3F
How many total valence electrons?
Answer:14
explanation: For CH3F, we have a total of 14 valence electrons. Hydrogen always goes on the outside of Lewis structures. And then Carbon is less electronegative than Fluorine, so let's put the Carbon in the center and the Hydrogens on the outside there, and the Fluorine on the top. We have a total of 14 valence electrons for CH3F.
Which refers to the type of chemical bond that involves the transfer of electrons between atoms? O metallic O polar covalent Oionic O covalent
Answer:
C-
Ionic
Explanation:
Just did the quiz
The bonding occurs between the valence electron of an atom. The ionic bond involves the transfer of electrons between atoms. Thus, option c is correct.
What is an ionic bond?A chemical bond that involves the complete transfer of electron/s from one element to another in a molecule or compound is an ionic bond.
The ionic bonds comprise cations that gave the electron to another element called the anion that gained or accepted the electron. This results in an attractive force between them to form a bond.
The positive and negative charges attract one another which leads to the formation of the ionic bond. The most common example is NaCl in which sodium has a positive and chloride has a negative charge.
Therefore, option c. ionic bond involves the transfer of electrons.
Learn more about ionic bonds here:
https://brainly.com/question/11527546
#SPJ6
A property is an aspect of matter that can be observed or measured without changing its chemical composition. Examples of properties include molecular weight, and A property may only be observed by changing the chemical identity of a substance. In other words, the only way to observe a property is by performing a chemical reaction. This property measures the potential for undergoing a chemical change. Examples of chemical properties include and oxidation states
Answer:
A physical property is an aspect of matter that can be observed or measured without changing its chemical composition. Examples of physical properties include molecular weight.
A chemical property may only be observed by changing the chemical identity of a substance. In other words, the only way to observe a chemical property is by performing a chemical reaction
Explanation:
Properties of matter
The properties of matter are classified into; (I) Physical and, (ii) Chemical properties.
Physical properties: A physical property is an aspect of matter that can be observed or measured without changing its chemical composition. Examples of physical properties include molecular weight, density, color, melting and boiling point, etc.
Chemical properties: A chemical property may only be observed by changing the chemical identity of a substance. In other words, the only way to observe a chemical property is by performing a chemical reaction. This property measures the potential for undergoing a chemical change. Examples of chemical properties include and oxidation states, acidic or basic properties, flammability, heat of combustion, etc.
a boy and a girl are pulling a heavy crate at the same time with 7 units of force each what is the net force on the object is the object balanced or unbalanced
Answer:
Net force= 0N or 0units
Object is balanced
Explanation:
Net force refers to all the sum total of all forces acting upon an object. In this case, a boy and a girl are pulling a heavy crate at the same time with 7 units of force each.
- This means that the force exerted on the crate by the boy is F1 = 7units
- The force exerted on the crate by the girl is F2 = -7units
Hence, the Fnet = F1 + F2
Fnet = 7 + (-7)
Fnet = 0 units
An object which possess a net force is said to be unbalanced, while an object with no net force i.e 0 units or N. Hence, the heavy crate in this case being pulled by a net force of 0units is BALANCED.
The force applied on the object is a balanced force since the object is at equilibrium.
The given parameters;
force applied by the boy, F₁ = 7 N
force applied by the girl, F₂ = 7 N
The net force on the object is the resultant of the two equal both opposite directed force.
Let the boy's direction be positive
Let the girl's direction be negative
The resultant of the two forces is calculated as;
[tex]\Sigma F_x = F_1 + F_2\\\\\Sigma F_x = (7 \ N) + (-7 \ N)\\\\\Sigma F_x = 0[/tex]
Thus, the force applied on the object is a balanced force since the object is at equilibrium.
Learn more here: https://brainly.com/question/931387
How much a material takes time to burn?
Need Variables for the Experiment
(a) Independent Variable:
(b) Dependent Variable:
(c) Constant Variable:
(a)- Time
(b)- Heat produced(i guess)
(c)- Material
this is what I think, hope it helps
My atomic number is 32. I am a-
Answer:
please mark brainliest!
Explanation:
Germanium is a chemical element with the symbol Ge and atomic number 32. It is a lustrous, hard-brittle, grayish-white metalloid in the carbon group, chemically similar to its group neighbours silicon and tin.
Grade 8 SCIENCE BASELINE - 2020-2021 Question: 1-39
To bring heavy boxes down a fight of stairs. Tyrone uses a camp. He shoes the boxes down the ramp. The movement transforms ce type d energy into the fons made togos
the way that most of the energy is transformed?
potential energy into chemical energy and mechanical energy
o potential energy into light energy and mechanical energy
o potential energy into sound and chemical energy
O potential energy into heat and kinetic energy
Answer:
This question is unclear, the comprehensive question is:
To bring heavy boxes down a flight of stairs, Tyrone uses a ramp. He slides the boxes down the ramp. The movement transforms one type of energy into two other forms. Which of the following describes the way that most of the energy is transformed:
ANSWER:
Potential energy into heat and kinetic energy
Explanation:
According to this question, a ramp is used to bring heavy boxes down a flight of stairs. Tyrone does this by sliding the boxes down the ramp. The ramp is in a fixed position i.e. not moving, meaning the energy in the ramp is POTENTIAL ENERGY.
However, when the boxes slide down the ramp, the potential energy transforms to energy due to motion called KINETIC ENERGY, and HEAT ENERGY, which is caused by the friction between the boxes and the ramp.
Therefore, the potential energy of the ramp is transformed to kinetic energy in the boxes and heat energy.
Ammonium nitrate (NH4NO3) is a common component of fertilizer because it is a great source of two nitrogen-containing ions that easily dissolve into water. A large batch of this liquid fertilizer is made by adding 2.13 pounds of ammonium nitrate to 26.00 gallons of water. What is the molarity of this solution? (Hint: 1 lb. = 454 g and 1 gal. = 3.79 L.)
Answer:
0.123 M
Explanation:
Molarity, which is molar concentration can be calculated by using the formula;
Molarity = number of moles (n) / Volume (V)
Number of moles of NH4NO3 can be calculated by using;
Mole = mass (M) / Molar mass (MM)
Since atomic mass of N= 14, H=1, O=16
Molar mass of NH4NO3 = 14 + 1(4) + 14 + 16(3)
= 14 + 4 + 14 + 48
= 80g/mol
1 pounds = 454g
2.13 pounds= 2.13 × 454 g
= 967.02g
Hence; mole of NH4NO3 = 967.02/80
= 12.09moles
Molarity of NH4NO3 in water (solution) = number of moles of NH4NO3 ÷ volume of water
1 gallon = 3.79Litres
26gallons = 26 × 3.79 litres
= 98.54 Litres
Therefore, Molarity = 12.09/98.54
Molarity of NH4NO3 solution = 0.1226
= 0.123M or mol/L
1. How is energy transferred within and between systems?
Plumbers often use a "dielectric union" joint to join pipes of different types. For example, copper pipes in a house might need to be joined with lead pipes in the main water supply. The dielectric union is a plastic joint that will not conduct electricity. Propose an explanation for why a copper pipe can't simply be welded directly to a lead pipe.
Answer:
a copper pipe can't simply be welded directly to a lead pipe because lead has a far lower melting point than copper and thus the lead will melt before the copper can even be effected.
Explanation:
A lead pipe is a pipe that's made of lead and is usually used in distribution of potable water to connect a water main source to a user's preferred area.
Now, a copper pipe can't simply be welded directly to a lead pipe because lead has a far lower melting point than copper and thus the lead will melt before the copper can even be effected.
Lead has a melting point of 327.5° C while copper wire has a melting point of 1082.778 °C
the two sides of the equation should be
Answer:
Hey mate.....
Explanation:
This is ur answer.....
---> Equal
hope it helps,
mark me as the brainliest,
Follow me......
Answer:
I am not quite sure if this is what you are looking for but each side of the equation should be equivalent.
The distortion changing the shape of enzyme molecules which occurs at high temperatures is known as
Answer:
denaturing
Explanation:
enzyme denatures in extreme temperature and pH
Answer:
Denaturation
Explanation:
It change the shape of enzyme . It also occur in only high temperatures
What is generally true about the particles in a gas?
A. Gas particles are closer together and have stronger attraction between them than the particles in a solid.
B. Gas particles are closer together and able to conduct electricity better than the particles in a plasma.
C. Gas particles are farther apart and able to conduct electricity better than the particles in a liquid.
D. Gas particles are farther apart and have weaker attraction between them than the particles in a solid.
Answer:
D
Explanation:
The bowling ball weighs 3.6 kg and the bowling pin weighs 1.36 kg. If the mass of the bowling ball is increased to 7.2 kg and the bowling pin is increased to 2.7 kg, what is the effect on the force between them? Group of answer choices
Answer:
F₂ = 3.97 F₁
Hence, the force will be increased by a factor of 3.97
Explanation:
The force between the ball and the bowling pin is given by Newton's Gravitational Law, as follows:
F = Gm₁m₂/r²
where,
F = Force
G = Gravitational Constant
m₁ = mass of ball
m₂ = mass of bowling pin
r = distance between ball and bowling pin
So, initially:
F₁ = G(3.6 kg)(1.36 kg)/r²
F₁ = 4.896 G/r²
After increase in masses:
F₂ = G(7.2 kg)(2.7 kg)/r²
F₂ = 19.44 G/r²
F₂/F₁ = (19.44 Gr²)/(4.896 G/r²)
F₂ = 3.97 F₁
Hence, the force will be increased by a factor of 3.97
Find the isotope nation and the decay particle
What are the characteristics of an experiment? What are key parts of an experiment?
Answer:
independent variable - the thing you change
dependent variable - the thing you measure
control variables - the things you keep the same
Which item has the most thermal energy?
There are two kinds of mixtures, homogenous and heterogenous. Homogenous mixture is the mixture that has uniform composition, while heterogenous mixture does not have a uniform composition.
A. True
B. False
Answer:
True
Explanation:
Homo = same
Hetero = different
Which is a characteristic of colloids?
a. are homogenous mixtures
b. have large dispersed particles
c. will settle out over time
d. are made up of at least two substances
Answer:
D
-----------------------------------------------------------------
The definition of colloids is very disputed on whether or not it is homo/heterogenous. I wouldn't go with this answer, but its based on what you learned it was. At a microscopic level its hetero but at a macroscopic its homo.
They do have somewhat large dispersed particles but this better describes suspensions
They don't easily settle out.
And in order to be a mixture, they are made up of at least two substances
D is likely the best answer out of the bunch.
Colloids are made up of at least two substances. Therefore, option d is correct.
What are colloids?A colloid can be described as a mixture in which one substance consisting of dispersed insoluble particles is throughout another substance. The particles should be dispersed in a liquid. The term colloidal suspension can be referred to unambiguously as the overall mixture.
A colloid exhibits a dispersed phase and a continuous phase. The dispersed phase particles have a diameter of about 1 nm to 1 μm. Some colloids are translucent due to the Tyndall effect and other colloids can be opaque or have a slight color.
Hydrocolloids can be described as certain chemicals that are colloidally dispersible in water. Therefore becoming very "soluble" they can change the rheology by raising the viscosity.
A colloid possesses a dispersed phase and a continuous phase. A solute in a solution is individual molecules, whereas colloidal particles can be bigger.
Learn more about colloids, here:
https://brainly.com/question/11640006
#SPJ2
Is 2AI+3O2= 2AI2O3 balanced or unbalanced
Answer:
balance
Explanation:
because you just add together but they just switch the 2 and 3
"Given a block of frozen salt water, how could you separate
pure water from the salt using only a fire & stove? Please be
as specific as you can by mentioning PHASE CHANGES.
Answer: You could put the frozen block of ice on the stove and let it melt and eventually boil out leaving the salt behind
Explanation:
What are the 3 components of an electromagnet?
Answer:
An electromagnet is a coil of wire wrapped around a bar of iron or other ferromagnetic material. When electric current flows through the wire, it causes the coil and iron bar to become magnetized. An electromagnet has north and south magnetic poles and a magnetic field.
Explanation:
The three main components of an electromagnet are the iron core, copper wire, and an electricity source.
What is an electromagnet?An electromagnet is a magnet in which a coiled or wrapped wire is given electricity. When Current is given to this wire, it acts like a magnet. An electromagnet is used to create a magnetic field.
The three main parts of the electromagnet are the iron core, that is the magnet, which is a small round, or square brick-like. The wire, wire, is made up of copper. The electricity source, by which electricity is given to the electromagnet.
Examples of electromagnets are induction cookers, doorbell rings, etc. They are controllable and adjustable magnets and are used in most electric appliances.
Thus, the three parts are the iron core, copper wire, and an electricity source.
To learn more about electromagnet, refer to the below link:
https://brainly.com/question/3427992
#SPJ2
Whose personal story did you read (if you read several, pick your favorite)? What was the most interesting or eye-opening part of that person's story?
You run from your house to the grocery store in 1.0 minute, and the store is 300 meters from your house. What is your average speed in meters per second for the trip?
Answer: 3
Explanation: