answer: 1.83 to 1
or at least that’s what i got
Earth is approximately 149,600,000 kilometers away from the sun. How would this distance be expressed in scientific notation?
Answer:
bo
Explanation:
I dont know nothing cuz am that smart and yes am cool wait I have to wait 67 seconds am not done answering you questions I will be back in a few....
Assume that an object has been placed in the pan of a triple beam balance. The
scales of the balance are shown below. What is the mass of the object?
Answer:
190.4 g
Explanation:
To obtain the mass of the object, we must be able to obtain the reading of the triple beam balance.
Thus, the reading of the balance can be obtained by simply adding the various values as indicated by the pointer in each scale.
This can be obtained as follow:
Scale 1 = 90 g
Scale 2 = 100 g
Scale 3 = 0.4 g
Reading of the balance = Scale 1 + Scale 2 + Scale 3
Reading of the balance = 90 + 100 + 0.4
Reading of the balance = 190.4 g
Thus, the mass of the object as indicated by the triple beam balance is 190.4 g.
What is the mass of an object if it produces a 20 N force with a 4m/s/s
acceleration?
Answer:
The answer is 5 kgExplanation:
To find the mass given the force and acceleration we use the formula
[tex]mass = \frac{force}{acceleration} \\ [/tex]
From the question
force = 20 N
acceleration = 4 m/s²
We have
[tex]mass = \frac{20}{4} \\ [/tex]
We have the final answer as
5 kgHope this helps you
1. What are physical and chemical properties of metals, nonmetals, and metalloids?
which feature is created on the exterior of a volcano when it errupts
Answer: Crater and lava flow
Explanation:
which of the following pairs would have
a the
larger size
K or k+ ?
Explain your
ur answer.
Answer: Here u go!
Explanation:
In other words, "K"^(+) has bigger effective nuclear charge than "Cl"^(-), which translates to a bigger net positive charge felt by the outermost electrons. This will compress the energy levels a bit and make the ionic radius smaller for the potassium cation. Therefore, the chloride anion will have the larger atomic radius.
Hope this helps ma dude!
Which characteristics of Earth’s surface can be determined by using a topographic map?
Explanation:
Contours allow the elevation and form of the cliffs, the thickness of the floor of the sea and the thickness of the slopes to be illustrated. Topographic maps of the USGS also display several other types of geographical characteristics, including highways , railroads, rivers , streams, lakes, borders, names of places or features, hills, and much more.
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
23. A 54-gram sample of an unknown material has a volume equal to 20 cm'. Based on its density,
could the sample be aluminum? Explain.
Answer:
The density of aluminum is 2.7 g/cm³. Thus given sample is aluminum.
Explanation:
Given data:
Mass of sample = 54 g
Volume of sample = 20 cm³
Density of sample = ?
Is the sample is aluminum = ?
Solution:
We will calculate the density from given mass and volume.
d = m/v
d = density
m = mass
v = volume
d = 54 g/ 20cm³
d = 2.7 g/cm³
From literature it is known that the density of aluminum is 2.7 g/cm³. Thus given sample is aluminum.
Alveolar air (a mixture of nitrogen, oxygen, and carbon dioxide) has a total pressure of 0.998 atm. If the partial pressure of oxygen gas is 0.198 atm and the partial pressure of nitrogen gas is 0.770 atm, what is the partial pressure of carbon dioxide in millimeters of mercury?
Answer:
22.8 mmHg
Explanation:
According to Dalton's law of partial pressures, the total pressure of a mixture of gases is obtained as the sum of the partial pressures if all the individual gases present in the mixture.
Since the total pressure of gases in the mixture is 0.998 atm, the partial pressure of carbon dioxide is;
PCO2 = [Ptotal - (PO2+ PN2)]
Hence;
PCO2 = [0.998 - (0.198 + 0.770)]
PCO2 = 0.03
Since
1 atm = 760 mmHg
0.03 atm = 0.03 × 760 /1
=22.8 mmHg
A given sample of oxygen occupies 500 mL when the pressure is 800 mmHg. What volume will the gas occupy at 200 mmHg, provided the temperature remains constant?
Answer:
The volume of the gas at 200 mmHg will be 2 L.
Explanation:
As the volume increases, the gas particles (atoms or molecules) take longer to reach the walls of the container and therefore collide with them fewer times per unit of time. This means that the pressure will be lower because it represents the frequency of collisions of the gas against the walls. In this way pressure and volume are related, determining Boyle's law which says:
"The volume occupied by a certain gaseous mass at constant temperature is inversely proportional to pressure"
Boyle's law is expressed mathematically as:
P * V = k
Now it is possible to assume that you have a certain volume of gas V1 that is at a pressure P1 at the beginning of the experiment. If you vary the volume of gas to a new value V2, then the pressure will change to P2, and it will be fulfilled:
P1 * V1 = P2 * V2
In this case:
P1= 800 mmHgV1= 500 mLP2= 200 mmHgV2= ?Replacing:
800 mmHg* 500 mL= 200 mmHg* V2
Solving:
[tex]V2=\frac{800 mmHg* 500 mL}{200 mmHg}[/tex]
V2= 2,000 mL= 2 L (being 1,000 mL=1 L)
The volume of the gas at 200 mmHg will be 2 L.
What filters out liquid waste?
stomach
esophagus
kidneys
Answer:
kidneys
Explanation:
What must be true if an atom is ionized?
Select one:
a. It must be radioactive
O b. It must have different numbers of protons and neutrons
O c. It must have an electron that has jumped to a higher energy
level
O d. It must have different numbers of protons and electrons
Answer:
I think it’s D.
Explanation:
An atom does not have a different amount of protons and electrons if there is no change... During ionisation you either lose or gain electrons, so when that happens (a change) it will have a different number.
pleas answer this, it’s due tomorrow. I will give brainliest.
Answer:
just the second
Explanation:
Answer:
both are changes in state, and both conserve mass. Hope it helps and please have a good day or night
How are u supposed to tell how many neutrons and electrons an element has?? Pls help if u know the answer.
Answer:
Explanation:
The atomic number (number at the top) is the amount of protons and the amount of electrons. So if an element has an atomic number of 5, you know that it has 5 protons and 5 electrons. The atomic mass (number at the bottom) is the amount of protons and neutrons added together.
PLEZ HELP ANSWER. IM STUCK!
d. 3
Explanation:
because the valence electrons on O is 3
Put the substance in a 25 mL beaker.
Click the beaker to get a closer look.
Now, observe and record the following:
- state of matter:
- appearance and texture:
- crystalline structure:
Answer:
1.) Liquid
2.) Powder
3.) No ( Not A Solid)
Explanation:
When substance put in a 25 mL beaker. than state of matter will be solid , appearance and texture will be powdered and crystalline structure will be powdered.
What is state of matter?A state of matter was one of many different shapes that matter can take. In daily life, four states of matter were visible: solid, liquid, gas, but also plasma.
What is crystalline structure?
The organized configuration of atoms, ions, and even molecules in such a crystalline material is usually referred to as crystalline structure.
Therefore,
state of matter = solidappearance and texture = powderedcrystalline structure = not solidTo know more about state of matter.
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23. A 54-gram sample of an unknown material has a volume equal to 20 cm'. Based on its density,
could the sample be aluminum? Explain.
Answer:
The given sample is aluminum.
Explanation:
Given data:
Mass of unknown sample = 54 g
Volume of given sample = 20cm³
Is sample is Al = ?
Solution:
In order to solve this problem we must know the density of Al from literature.
density of Al = 2.7 g/cm³
Now we will calculate the density of given unknown sample.
d = m/v
d = 54 g/ 20cm³
d = 2.7 g/cm³
Thus given sample is aluminum.
Li, Rb, F, and I
Which one would have the highest Electronegativity? Why?
Answer:
F
Explanation:
has 7 valence electrons , it really want to hog another electron to reach an octet.
therefore it has a highest electronegativity
Which person has the most potential energy
Answer:
b
Explanation:
Would you feel like a superhero if you could melt metal just by holding it? The element gallium is a solid at room temperature, but it will reach
its melting point and melt if you hold it in your hand. If you pour the liquid gallium into a container at room temperature, it will become solid
again. How do the melting point and the freezing point of gallium compare to each other?
O A The freezing point of gallium is higher than its melting point
O
B. The freezing point of gallium is lower than its melting point.
O
C. The freezing point of gallium equals its melting point.
OD
Both the freezing point and the melting point of gallium vary.
Answer:
C is your correct answer i blieve
The element gallium has equal freezing point and melting point owing to which on pouring liquid gallium in container it becomes a solid.
What is an element?An element is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.
Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.
The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.
Learn more about element,here:
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when one gram of gasoline burns in a cars engine, the amount of energy given off is approximately 1.03x10^4 cal. express this quantity in joules. use 1 cal= 4.184 j
The amount of energy in joules : 4.31 x 10⁴ J
Further explanationEnergy can be interpreted as the ability to do work
There are several examples of energy , including heat energy
The amount of heat is influenced by the mass of the object and the difference in temperature
Can be formulated
Q = m.c.ΔT
Q: heat received or removed by an object (J)
m: object mass (kg)
c: heat type substance (J / kg⁰C)
ΔT: temperature change (⁰C)
The amount of energy given off is 1.03x10⁴ cal.
Because 1 cal= 4.184 J, then
[tex]\tt =1.03\times 10^4\times 4.184\\\\=\boxed{\bold{4.31\times 10^4~J}}[/tex]
fog forms when a water vapor changes to the___ state of matter?
Answer:
Gas
Explanation:
The density of pure solid copper is
2.54 g/mL. What is the mass of 250 milliliters of the substance
Answer:
The answer is 508 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question we have
mass = 2.54 × 200
We have the final answer as
508 gHope this helps you
Make a suggestion on how you will deal with each problem.
what’s the independent and dependent variable?
Answer:
independent variable: a variable (often denoted by x ) whose variation does not depend on that of another.
dependent variable: a variable (often denoted by y ) whose value depends on that of another.
Explanation:
how many carbon atoms are in C6H14N4O2
a.4
b.2
c.6
d.14
Answer:
6
Explanation:
Answer:
6
Explanation:
C6
Carbon 6
all matter has ____. A.mass B.weight C.color D.volume btw it is multiple choice. please help
Answer: mass
Explanation:
What are the fundamental units of mass, length, and temperature in the
metric system? *
Answer:
Kg, meters or centimeters, Celcius
2. What is the total energy equation?
Total energy = kinetic energy * potential energy
Total energy = kinetic energy - potential energy
Total energy = kinetic energy + potential energy
Total energy = kinetic energy / potential energy
Answer:
Kinetic energy + Potential energy
