scientific notation is a mathematical way to turn large of small numbers into a simpler form.
ex. 9000000000 is 9*10^9 in scientific notation
ex. 0.000000009 is 9*10^-9 in scientific notation
a sample of a substance has a mass of 52.5g and displaces a volume of 4.2ml. what is the density of the substance
Answer:
Density = 12.5 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]Density = \frac{mass}{volume} [/tex]
From the question
mass = 52.5 g
volume = 4.2 mL
Substitute the values into the above formula and solve for the density
We have
[tex]Density = \frac{52.5}{4.2} \\ [/tex]
We have the final answer as
Density = 12.5 g/mLHope this helps you
It takes Serina 0.25 hours to drive to school. Her route is 16 meters long. What is
Serina's average speed on her drive to school? *
Answer:
60 (1 hour) × 0.25 = 15 minutes
15 ÷ 16 = 0.9375 meters per minute
What has mass?
A. Energy
B. Heat
C. Light
D. Matter
Answer:
matter
Explanation:
Answer:
matter is your answer
hope this helped
When the law of conservation of energy is applied to heat, it is known as the _____ law of thermodynamics. a) zeroth b) first c) second d) third
Answer:
b first
Explanation:
first law of thermodynamics: energy can neither be created or destroyed; however, when heat is added to a system, energy can be changed from one form to another.
Answer:
This is the first law of thermodynamics.
Explanation:
I need brainliest!!!!!!!!! you've never given me one
a nickel atom (atomic symbol Ni) has an atomic number of 28 and has an atomic mass of 59. how many neutrons does it have ??
Answer: 31 neutrons
Explanation:
If the density of a substance is d=2.1g/cm^3 what is the mass of 20.0mL of this substance
Answer:
Explanation:
density = mass (g)/ volume (cm3)
2.1 = mass / 20 cm3
mass = 42 g
be attention that each 1 ml =1cm3
An example of a physical property of an element is the element's ability to
Answer:
dissolve
Explanation:
When it dissolves , no chemicals are formed and it is considered as a physical property.
Answer:
what is it ???? I need help to
examples of white bloodcell
Answer: White blood cells help the immune system and help fight infection and disease.
what is Alkanoic acid
Answer:
an aliphatic acid (such as hexanoic acid) regarded as derived from an alkane and containing the same number of carbon atoms as the alkane.
Explanation:
Answer:
Acetic acid, systematically named ethanoic acid, is a colourless liquid organic compound with the chemical formula CH₃COOH. When undiluted, it is sometimes called glacial acetic acid. Vinegar is no less than 4% acetic acid by volume, making acetic acid the main component of vinegar apart from water.
71. Chloroform is a liquid once used for anesthetic. What is the volume of 5.0 g of chloroform. The density of chloroform is 1.49 g/mL.
Answer:
Volume, V = 3.35 mL
Explanation:
Given that,
The density of chloroform is 1.49 g/mL
We need to find the volume of 5.0 g of chloroform. Let V is its volume.
Density is equal to mass per unit volume.
[tex]d=\dfrac{m}{V}\\\\V=\dfrac{m}{d}\\\\V=\dfrac{5\ g}{1.49\ g/mL}\\\\V=3.35\ mL[/tex]
So, the volume of 5 g of chloroform is 3.35 mL.
What is the flow of science ?
A small snail makes a journey that takes him in a circle of area 0.750square meters in one day. What is the area of the circle that the snail makes in square inches? Round to three significant figures. Do not give the units in your answer.
Answer:
1160
Explanation
1 square meter = 1550 square inches
[tex].0750 square meters * \frac{1550 square inches}{1 square meter}[/tex] = 1162.5 becomes 1160 when rounded to 3 sig figs.
The area of the circle of 0.750 m² is equivalent to 1.16 × 10³ in².
We want to convert 0.750 m² to in². We will use the conversion factor 1 in = 0.0254 m, squared.
[tex]0.750 m^{2} \times (\frac{1in}{0.0254m} )^{2} = 1.16 \times 10^{3} in^{2}[/tex]
The area of the circle of 0.750 m² is equivalent to 1.16 × 10³ in².
You can learn more about unit conversion here: https://brainly.com/question/19420601
Why are the trends and exceptions to the trends in ionization energy observed? Check all that apply. -Ionization energy tends to increase down a group because the electrons get farther away from the nucleus. -Ionization energy tends to increase across a period because the nuclear charge increases. -Ionization energy tends to increase across a period because electrons are added to the same main energy level. -The ionization energies of the elements in Group 16 tend to be slightly smaller than the elements in Group 15 because the fourth electron is added to an unfilled p orbital. -The ionization energies of elements in Group 13 tend to be lower than the elements in Group 2 because the full s orbital shields the electron in the p orbital from the nucleus.
Answer:
2, 3, 5
Explanation:
just the person above
The correct answer is the Ionization energy tends to increase across a period because electrons are added to the same main energy level and the ionization energies of elements in Group 13 tend to be lower than the elements in Group 2 because the full S orbital shields the electron in the p orbital from the nucleus.
What is causing the ionization energy trend?The first ionization energy increases as you move left to right across a period on the periodic table. This is because when the nuclear charge rises, the outermost electron has become more tightly connected to the nucleus.Learn more about Ionization energy here:
https://brainly.com/question/20658804
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1. What is one example of a chemical reaction?
Answer:
AN EXPLOSION
Explanation:
Answer ASAP!!!
Can sperm clear ance, if so can you freeze it and save it for later? Lol I want too see if it works, I heard it does but no sure.
Answer:
Yes, you heard right!" she wrote for the news outlet. "Using your partner's sperm as a mask is full of a compound called spermine, which is an antioxidant which can help reduce wrinkles, smooth the skin, prevent acne or spots and give you overall healthy-looking skin.
And yes they do have st home sperm freezing kits you can order
good luck
To the Mayans, what was the utmost important thing to do?
hello my name is bob free give me the free give me th efree points
Explanation:
A color-coded periodic table. Which elements are metals? Check all that apply. rhenium (Re) boron (B) lithium (Li) krypton (Kr) phosphorus (P) mercury (Hg)
Answer:
re) li) hg)
Explanation:
You are making sweet tea. You add 56g of sugar into 78g if tea. What is the mass percent of sugar ?
Answer:
Approximately 72%
Explanation:
[tex]Sugar = 56g\\Tea's \:mass = 78g\\\\Sugar\:mass\:percentage = \\\frac{56}{78} \times 100\\\\\frac{5600}{78} \\\\=71.79\\Approximately \:72\%[/tex]
Which particles contribute to the atomic number and why ??
Answer:
the number of protons in the nucleus that are found in an atom is what determines an element's atomic number.why you may ask and thats because Protons contribute to the mass of an atom.(along with neutrons but they dont have a charge)but protons provide a positive charge to the nucleus.
Explanation:
because the atom is electrically neutral, the number of electrons must equal the number of protons.
The particles that contribute to the atomic number are the number of protons. Protons contribute to the atomic number because it is positively charged and present inside the nucleus. The correct option is c.
What is the atomic number?The quantity of protons in an atom's nucleus is known as the atomic number. The number of protons determines an element's identity. The atomic number contributes to the number of protons.
There are three subatomic particles present inside the particles. These are electrons, protons, and neutrons. The electron is negatively charged, a proton is positively charged, and a neutron is neutral.
Because the atom is electrically neutral, the number of electrons must equal the number of protons.
Thus, the correct option is c. protons.
To learn more about the atomic number, refer to the link:
https://brainly.com/question/11183339
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The question is incomplete. Your most probably complete question is given below:
a. atoms
b. neutrons.
c. protons.
d. electrons.
An object has a mass of 8.5 g and a volume of 17 mL. What is the density of the object?
Answer:
0.5 g/ml
Explanation:
becace the density of an object is its mass divided by its volume
0,5 g / ml
Explicação:
porque a densidade de um objeto é a sua massa dividida pelo seu volume
An unknown solid is placed on a scale and has a mass of 2.5 grams. The solid then displaces 35 mL of water in a graduated cylinder. Find the unknown solid’s density.
Answer:
The unknown solid’s density is 0.071 [tex]\frac{g}{mL}[/tex]
Explanation:
Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space. In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance. Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
[tex]density=\frac{mass}{volume}[/tex]
From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.
Archimedes' principle states that every body immersed in a fluid experiences a vertical and upward thrust equal to the weight of fluid dislodged. In other words, this principle says that the volume of the object is equal to the volume of the water displaced or displaced. So:
mass= 2.5 gramsvolume=35 mLReplacing in the definition of density:
[tex]density=\frac{2.5 g}{35 mL}[/tex]
you get:
[tex]density=0.071\frac{g}{mL}\[/tex]
The unknown solid’s density is 0.071 [tex]\frac{g}{mL}[/tex]
Answer: The answer would be 0.071 g/cm^3
Explanation:
What is the volume of 88.2 g of silver metal (density = 10.50 g/cm^3)
Answer:
The answer is
8.4 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} [/tex]
From the question
mass = 88.2 g
density = 10.5 g/cm³
The volume is
[tex]volume = \frac{88.2}{10.5} [/tex]
We have the final answer as
8.4 mLHope this helps you
Answer:
8.4 km
Explanation:
If I have 20g of Sodium, how many moles of Sodium Oxide (Na2O) can be made?
What is a joule?
O A. A unit of measurement for mass
O B. A unit of measurement for power
C. A unit of measurement for energy
O D. A unit of measurement for gravity
Answer:
C. A unit of measurement for energy
Explanation:
Joule is the SI unit of
EnergyWorkAnd HeatUnit of measurement of mass: Kilogram(Kg)
Unit of measurement of Power: Watt(W)
Unit of measurement of Gravity: m/s^2
Hope this helps ;) ❤❤❤
Answer:
C. A unit of measurement for energy
Explanation:
a p e x 2021!
Beryllium's atomic mass is 9, and its atomic number is 4. How many protons are found in a beryllium atom?
Answer:
4 protons
Explanation:
The number of protons in an atom is equal to the atomic number. In this case, we have beryllium whose atomic number is 4, so it has 4 protons.
Which type of scientist
studies everything
from the tiniest
organisms to human
beings?
Answer:
Biology
Explanation:
Biology is the study of all living beings. From the smallest algae or micro organism to the biggest living being is all covered under biology. How micro organisms live, how do they function and how they affect other living beings is studied in biology.
Answer:
Micro bioligist
Explanation: hope this helps
Four marbles are made of different metals. Each marble has the same mass, but a different volume. The density of each metal is given in the table.
what does H2CO3 mean on the periodic table
Answer:
Carbonic acid
Best of luck
225 mm=_____hm
this is a 2-step problem
To find how many hectometers this is, we can divide the amount by 100,000.
225 / 100000 = 0.00225
Therefore, 225mm = 0.00225hm
Best of Luck!
A 5.00 g piece of metal is heated to 100.0oC, then placed in a beaker containing 20.0 g of water at 10.0oC. The temperature of the water rises to 15.0oC. Calculate the specific heat of the metal. What is the metal?