Answer:
by playing with each other
Explanation:
the play fight and stuff so when the get older the hunt and stuff yk
Answer:
Playing with each other
Explanation:
Kinda like bear Cubs they play rough but if I’m wrong it gonna be by being fed by their mothers if I’m wrong
What is the volume of 25 g of ethyl alcohol with a density of 0.79 g/mL?
Answer:
31.64...
Explanation:
The formula is volume is equal to mass over density.
So 25/0.79=31.64...
The volume of ethyl alcohol is 31.645mL.
What is volume?Volume is the amount of space the matter occupies.
What is ethyl alcohol?Ethyl alcohol is a clear, colourless liquid and the main ingredient in alcoholic beverages.
Density = mass/volume
D = m/v
v x D = m
On multiply both sides by D,
v x D/D = m/D
v = m/D
= 25g/0.79g/mL
= 31.645mL
Hence, the volume of ethyl alcohol is 31.645mL.
To learn more about volume and ethyl alcohol here
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Most neutral atoms of phosphorus have an atomic mass of 31 amu and an
atomic number of 15. What are these atoms composed of?
O A. 15 protons, 31 neutrons, and 15 electrons
B. 15 protons, 16 neutrons, and 15 electrons
C. 15 protons, 16 neutrons, and 16 electrons
D. 15 protons, 15 neutrons, and 15 electrons
Answer:b
Explanation:
don’t listen to the guy in the comments
The element contains 15 protons (atomic number), 15 electrons, and 16 neutrons (mass number minus atomic number).
What are protons, neutrons and electrons?The atomic number for any component exists as the number of protons in its atomic nuclei. In a neutral atom, the number of electrons exists exactly as the number of protons. The atomic mass (mass number) exists as the totality of the protons and neutrons in the nucleus. The mass number can change due to the particular that the number of neutrons can vary. Isotopes exists called for their mass numbers.
So, this element contains 15 protons (atomic number), 15 electrons, and 16 neutrons (mass number minus atomic number).
This isotope exists phosphorus - 31, which contains atomic number 15.
Therefore, the correct answer is option B. 15 protons, 16 neutrons, and 15 electrons.
To learn more about protons, neutrons and electrons refer to:
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There are 12 liters of nitrogen gas in a sample. How many moles of N2 in this sample?
Answer:
0.54 moles of N2
Explanation:
First remember to find the volume in moles, 1 mole equals 22.4 liters.
So now use the dimensional analysis to show your work.
12 liters of N2 * 1 mol /22.4 liters of N2
Now calculate this. 12 * 1/22.4 or 12/ 22.4
12/22.4 = 0.535714286.
12 has two significant digits.
With that, The answer rounds to 0.54.
So that the final answer is 0.54 moles.
Hope it helped!
An atom has 24 protons, 22 electrons, and 28 neutrons. What is the MASS # of the atom
The mass of an atom is given by the sum of the number of PROTONS and the number of NEUTRONS since ELETRON'S mass is negligible.
The mass is 24+28 = 52.
How is the periodic table useful today?
Answer:
The periodic table is useful today for finding out all the elements that exists on Earth. The elements there can be used to write down chemical formulas, calculate things like molar mass/atomic mass of each element, atomic number for each, number of valence electrons each element has, the oxidation number for each, etc. Lastly, it can be used to predict the properties of elements yet to be discovered.
Explanation:
Hope it helped!
Choose the formula for calcium silicate.
A: CaSiO3
B: Ca(SiO3)2
Please Help me it’s balancing equations
Answer:
Blank 1: 1
Blank 2: 1
Blank 3: 2
Explanation:
I think the question is like this __Na2O +___H2O =___NaOH
I used "á" this word as equal sign. Is there any wrong with that?
Baby Smiley has curly hair, but neither of her parents do. Is this possible?
Answer:
yes it was a one in four chance
Explanation:
Which of the following could affect infiltration of water into the surface of the soil? Explain in detail.
I. Concrete sidewalks
II. Parks and gardens
I WILL MARK AS BRAINLIST
Answer:
I. Concrete sidewalks
Explanation:
One of the factor that affects the infiltration of water into the surface of the soil is the use of concrete sidewalks.
A concrete sidewalk prevents water from infiltrating down into the soil profile. Infiltration deals with the movement of water into the soil or ground. It is the major source of ground water recharge. Also, infiltration makes water available for plants.Concrete is impermeable and non - porous media
When concrete pavements are used, water will not be able to move into the ground. They run on the surface and collects into nearby streams and water bodies.
explain in complete sentences how a convection current is created
Answer:
Convection currents are caused by the movement of the magma in the mantle.
Explanation:
i) Mass of CO2 formed = 2.241 g Molar mass of CO2 = Atomic mass of C + 2 (Atomic mass of O) = 12 + 2 (16) g/mol = 44 g/mol Thus, moles of carbon dioxide formed
Answer:
0.05mole
Explanation:
Given parameters:
Mass of Carbon dioxide formed = 2.241g
Molar mass of Carbon dioxide = 44g/mol
Unknown:
Number of moles of carbon dioxide = ?
Solution:
To solve this problem, we use the expression below:
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Now, insert the parameters and solve;
Number of moles = [tex]\frac{2.241}{44}[/tex] = 0.05mole
WILL MARK U BRAINLIEST. How many atoms of oxygen are found in one mole of naturally occurring oxygen gas (O2)? Is this different from the number of atoms found in one mole of pure solid iron? Be sure to explain your answer using reference to Avogadro's number.
Answer:
The atomic mass of each element is listed below the symbol of the element in the periodic table: Cu =
63.55 amu, Hg = 200.59 amu, S = 32.07 amu, and He = 4.00 amu. The mass of Avogadro’s number of atoms
is the atomic mass expressed in grams. Therefore, 6.02 × 1023 a
Explanation:
Triassic, Jurassic, and Cretaceous: these are also divisions of the Mesozoic Era
Answer:
correct
Explanation:
thanks for being a smarty pants
Which of the following pairs of compounds will react to form a precipitate? Why?
calcium chloride and silver nitrate
sodium iodide and potassium chloride
calcium chloride and sodium nitrate
Answer:
calcium chloride and silver nitrate
Explanation:
A precipitate is often formed in a double replacement reaction when the reaction yields an insoluble product.
Consider the reaction between calcium chloride and silver nitrate;
CaCl2(aq) + 2AgNO3(aq) -------->2AgCl(s) + Ca(NO3)2(aq)
AgCl is insoluble in water, hence the reaction leads to the formation of a precipitate.
what is the density of 80 gram of a substance occupying a volume of 250 c.m cube at 25°C and 1 atmosphere?
Answer:
Density = 0.32g/mL
Explanation:
Density of a substance can be calculated using the formula:
Density (g/mL) = mass (g)/volume (mL)
According to the information provided in this question, mass of the substance = 80grams, volume = 250cm³/mL
Note that, the pressure and temperature are not needed to calculate the density of the substance.
Density = 80/250
Density = 0.32g/mL
Which of the following is NOT a kitchen tool category?
A. Measuring
B. Convection oven
C. Food preparation
D. Cutting
Answer:
B. Convection oven
Explanation:
The following are all in a kitchen tool category;
I. Measuring: this includes tools such as tapes, scale (balance), graded-cup, teaspoon, which are used for taking measurements of food items in the kitchen.
II. Food preparation: it comprises of various tools used in the kitchen for the preparation of food. This includes pots, cooker, spoon, turner etc.
III. Cutting: these are tools used for cutting food items and it include knives, chopping board, grinder etc.
A convection oven is typically designed and developed with multiple fans for circulation of air and as such it is used for baking. It is mainly used in big industries and restaurants.
ILL GIVE BRAINLEIST IF CORRECT:
A jeweler heats a silver strip and bends it into a bracelet. The jeweler then cools the bracelet. What happens to the particles when the strip of silver is heated?
(There may be more than one answer)
A. The particles move farther apart
B. The amount of particles increase
C. The particles get closer together
D. The particles move faster
Answer:
A
Explanation:
When the strip of silver is heated, the silver particles move farther apart.
if a solution is given to you, how will you determine whether it is acid,base or salt
Answer:
If your lab has litmus paper, you can use it to determine your solution's pH. When you place a drop of a solution on the litmus paper, the paper changes color based on the pH of the solution. Once the color changes, you can compare it to the color chart on the paper's package to find the pH.
Explanation:
A solution's pH will be a number between 0 and 14. A solution with a pH of 7 is classified as neutral. If the pH is lower than 7, the solution is acidic. When pH is higher than 7, the solution is basic. These numbers describe the concentration of hydrogen ions in the solution and increase on a negative logarithmic scale.
For example, If Solution A has a pH of 3 and Solution B has a pH of 1, then Solution B has 100 times as many hydrogen ions than A and is therefore 100 times more acidic.
What is the molar mass of chlorine gas? (Hint: Be careful... the gas exists as Cl2)
Select one:
a. none of the above
b. 35.5 g
c. 71.0 g
d. 17.125 g
the calculation was like 70.90 so would it be none of the above??
How many significant figures are there in the measurement 0.0034 Kg?
Answer:
2 significant figures
Explanation:
Your measurement will have 2 significant figures, the two non-zero digits.
I hope this helps you out! :)
Answer:
there are 2 sig figs ( significant figures) which is 34. Zeros are not counted as significant figs in decimals like above
This planet has a toxic atmosphere.
O Mercury
O Venus
O Earth
O Mars
the answer is venus.
a. How many moles of H2 are produced from two
moles of CH4 ?
Pb has an atomic number of 82. It has an isotope Pb-207. The mass number is 207.
How many protons are in Pb 207?
O 82
125
O 207
none of these
Answer:
Number of protons = 82
Explanation:
Given data:
Atomic number of Pb = 82
Mass number of Pb-207 = 207
Number of protons = ?
Solution:
An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.
All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.
Atomic number of Pb = number of protons or electrons
82 = number of protons or electrons
Mass number = Number of protons + number of neutron
207 = 82 + number of neutron
Number of neutrons = 207 - 82
Number of neutrons = 125
Please help. I’m really struggling. No wrong answers please, if you don’t know it please don’t answer, I’m already failing the class.
Answer:
K₅Mn₅O₁₆
Explanation:
From the question given above, the following data were obtained:
Potassium (K) = 27.5 %
Manganese (Mn) = 37.5 %
Oxygen (O) = 35 %
Empirical formula =?
The empirical formula for the compound can be obtained as follow:
K = 27.5 %
Mn = 37.5 %
O = 35 %
Divide by their molar mass
K = 27.5 / 39 = 0.705
Mn = 37.5 / 55 = 0.682
O = 35 / 16 = 2.188
Divide by the smallest
K = 0.705 / 0.682 = 1
Mn = 0.682 / 0.682 = 1
O = 2.188 / 0.682 = 3.2 = 32/10 = 16/5
K = 1
Mn = 1
O = 16/5
Multiply by 5 to express in whole number
K = 1 × 5 = 5
Mn = 1 × 5 = 5
O = 16/5 × 5 =16
Thus, the empirical formula for the compound is K₅Mn₅O₁₆
Plz help ASAP
Thx sm
Answer:
The answer is B!
Explanation:
Answer:
B
Explanation:
Emily and Patrick are trying to lift their friend hunter onto a tree branch. Emilio is pushing hunter upward with a force of 250 N. Patrick is pushing hunter upward with a force of 310N. Earth’s gravity is pulling Hunter downward with a force of 520 N
Assume all other forces on hunter are balanced. Which statement describes the forces on hunter ?
Answer:
The forces are unbalanced, so there is net force on the hunter.
Explanation:
To know which option is correct, we shall determine the net force acting on the hunter.
From the question given above, the following data were obtained:
Force applied by Emilio (F₁) = 250 N
Force applied by Patrick (F₂) = 310 N
Force of gravity (F₉) = 520 N
Next, we shall determine the total force applied in lifting the hunter. This can be obtained as follow:
Force applied by Emilio (F₁) = 250 N
Force applied by Patrick (F₂) = 310 N
Total force applied (Fₜ) =?
Fₜ = F₁ + F₂
Fₜ = 250 + 310
Fₜ = 560 N
Finally, we shall determine the net force acting on the hunter. This can be obtained as follow:
Force of gravity (F₉) = 520 N
Total force applied (Fₜ) = 560 N
Net force (Fₙ) =?
Fₙ = Fₜ – F₉
Fₙ = 560 – 520
Fₙ = 40 N
Thus the net force acting on the hunter is 40 N
From the calculations made above, we can see that the net force acting on the hunter is 40 N.
Therefore, the correct answer to the question is:
The forces are unbalanced, so there is net force on the hunter.
1. Cars use
to run, then they spit out carbon.
uhm they use gas/fuel to run
HELPPP
The sum of percentage compositions must equal to 100 ±0.1.
True
False
Answer:
True
Explanation:
oi oi oi oi oi help pls
Answer:
F
Explanation:
nonmetal doesn't conduct, is shiny and silver and is solid. Hope this helps :)
We are ALWAYS conscious (aware) of why we decide to do the things we do:
True or false
Answer: true
Explanation: