Density is defined as the mass divided by volume.
Density is also known by the name of viscosity.
Density is denoted by D.
It's unit is basically denoted by kg/m^3.
The density of the block is 0.42 g/cm^3.
The formula of the density is, Density = mass (m) / volume (v)
Now, it is given in the word problem that,
Mass of pine wood = 27g
Volume = 4^3 = 64 cm^3
Thus, Density = 27 g /64 cm^3 = 0.42 g/cm^3.
Hence, the density of the block of pine would be 0.42 g/cm^3
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ASAP please and Thankyou
The name for the ionic compound CoHPO4
Answer:
Dicalcium phosphate. (I'm sure meant for the "o" to be an "a" for Calcium).
Explanation:
I hope this helps! :D Have a nice night!
calculate the number of magnesium atoms in a 120.0g sample of forsterite mg2sio4. be sure your answer has a unit symbol if necessary, and round it to 4 significant digits.
The number of magnesium atoms present in forsterite are 10.272 x 10²³
Equation :First we have to calculate the moles of magnesium
moles of forsterite = mass of forsterite / molecular mass of forsterite
moles of forsterite = 120.0 g / 140.69 g/mol
moles of forsterite = 0.8529 mole
Now we have to calculate the number of magnesium atoms
The formula of forsterite is mg2sio4
In the forsterite molecule, there 2 atoms of magnesium, 1 atoms of silicon and 4 atoms of oxygen.
As, 1 mole of forsterite contains 2 x 6.022 x 10²³ number of magnesium
So, 0.8529 mol of forsterite contains
= 0.8529 x 2 x 6.022 x 10²³
= 10.272 x 10²³ number of magnesium atoms
Therefore, the number of magnesium atoms present in forsterite are 10.272 x 10²³.
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write the formula of the first 5 members in the series of alkynes
Josh prepares a solution by mixing sodium nitrate and water. To calculate the molarity of the solution, Josh should calculate the moles of which substance, and why?
sodium nitrate, because it is the solvent
sodium nitrate, because it is the solute
water, because it is the solvent
water, because it is the solute
Answer:
sodium nitrate, because it is the solute
Explanation:
To find the molarity of the solution, Josh should determine the number of moles of the sodium nitrate.
Molarity is defined as the number of moles of solutes in a given volume of solution.
Molarity = [tex]\frac{n}{v}[/tex]
n is the number of moles of solute
v is the volume of solution
Answer:
C: sodium nitrate, because it is the solute
Explanation:
Rashid belays net worth
Part A
If the theoretical yield of the reaction below corresponds to 99.2 g and the actual yield was 60.9 g, calculate the percent yield.
Given: Li2O + H202LiOH
20
Answer:
61.39%
Explanation:
The percent yield of a substance can be calculated using the formula:
Percent yield = actual yield/theoretical yield × 100%
Based on the information provided on the reaction in this question, the theoretical yield is given as 99.2g while the actual yield is given as 60.9g.
Hence, the percent yield is calculated thus:
% yield = 60.9/99.2 × 100
% yield = 0.6139 × 100
% yield = 61.39%
The percent yield is 61.39%
how many molecules are in 2.5 mol of NaCl?
(a) 1.51×10^24
(b) 146
(c) 1.51×10^23
(d) 4.15
Answer:
1.51 x 10²⁴molecules
Explanation:
Given parameters:
Number of moles of NaCl = 2.5moles
Unknown:
Number of molecules = ?
Solution:
The number of molecules that can be found in a given mole is given as the Avogadro's constant;
1 mole of substance = 6.02 x 10²³ molecules
2.5 mole of NaCl = 2.5 x 6.02 x 10²³ molecules
= 1.51 x 10²⁴molecules
The OH-ion concentration of a blood sample is
2.5 x 10-7M. What is the pH of the blood?
a. 6.60
b.0.99
c.740
d.1
Answer:
She okeyy
Explanation:
Example 740 are the think free ofıce pH of the blood 740 blood sample iş takipte kal ❣️
calculate the number of atoms in 2.5 mol manganese.
Answer:
1.5 × 10²⁴ atoms Mn
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:
Step 1: Define
2.5 mol Mn
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
[tex]2.5 \ mol \ Mn(\frac{6.022 \cdot 10^{23} \ atoms \ Mn}{1 \ mol \ Mn} )[/tex] = 1.5055 × 10²⁴ atoms Mn
Step 4: Check
We are given 2 sig figs. Follow sig fig rules and round.
1.5055 × 10²⁴ atoms Mn ≈ 1.5 × 10²⁴ atoms Mn
In 2018, Micah Williams, of Benson High School, set the Oregon High School State Track meet record in the 100 meter dash by posting a time of 10.42 seconds. What was his average speed?
Answer:
Average speed = 9.59 m/s
Explanation:
Given data:
Distance = 100 m
Time taken = 10.42 s
Average speed = ?
Solution:
Formula:
Average speed = distance covered / time taken
by putting values,
Average speed = 100 m / 10.42 s
Average speed = 9.59 m/s
gher ord inking skills type questions: If a compound gives hydrogen ion and chloride ion in the solution state,
Write name and molecular formula of the compound.
At normal temperature and pressure, hydrogen chloride (HCl), a gas composed of the element's hydrogen and chlorine, is a gas.
An aqueous solution of hydrogen chloride is what is known as hydrochloric acid, commonly referred to as muriatic acid. It has an unmistakably strong odor and is colorless. It is categorized as a powerful acid. In the digestive tracts of the majority of animal species, including humans, it is a part of the stomach acid. In the food, textile, metal, and rubber sectors, hydrogen chloride (HCl) is frequently employed as a bleaching agent to neutralize alkaline substances. When discharged into the soil, it is neutralized, and when it comes into contact with water, it hydrolyzes quickly.
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i need help with the je that asks which parent actually determines the sex the child
Answer:
Actually it is father who actually determine the sex of child
Explanation:
Because father has X & Y chromosome but mother has only XX chromosome. So it depends on which chromosome of father. If father's gamete has only x chromosome then the child will be female. And if the father's gamete has Y chromosome then the child will be male.
please mark me brainliest and 5 star
The membrane of the egg I like the cell membranes because
(b) largest radius: S, CI, P
Answer:
P
Explanation:
radius decreases as you go from left to right
use the term reclamation in a sentence
Answer:
Explanation:
The increase of the arable land has been affected partly by the reclamation of the marshes, but mostly by the transformation of large tracts of the puszta
An example of a reclamation is how landfill employees sift through garbage to find usable items. An example of a reclamation is trees growing on land that was heavily logged.
a sample of gas collected in the upper atmosphere of 0.75 atm is compressed into a 150.0 mL container at the same temperature. To what volume would the original sample have had to be compressed to exert a pressure of 10.0atm
I am trying to find out what v1 is
p1= 0.75
p2=10.0 atm
v2=150.0mL
v1=?
Answer:
Say Sofa and king ten times in a row fast
Explanation:
Do Elements retain their properties when they form a compound?
Answer: No
Explanation:
The components of a compound do not retain their individual properties.
What type of soil is best for growing plants?
Write the name of Co4(SiO4)3
Answer:
Copper siliconquadoxide
Explanation:
if vegetable oils made of vegetables, and olive oils made of olives......whats baby oil made of?
ANSWER:
oil lol
EXPLANATION:
Answer:
Mineral oil, fragrance, aloe barbadensis leaf extract, tocopheryl acetate (vitamin E), water.
Explanation:
What Group is this element in?
Please answer （＾∇＾）
Please help ..
What is the molarity of a 0.30-liter solution containing 0.50 moles of H2SO4?
A 1.7M
B 0.6M
C 0.8M
D 0.15M
Answer:
1.7M
Explanation:
Given parameters:
Volume of solution = 0.3L
Number of moles = 0.5moles
Unknown:
Molarity = ?
Solution:
The molarity of a substance is the number of moles of solute that can be found in the volume of a solution.
Molarity = [tex]\frac{number of moles }{volume}[/tex]
Insert the parameters and solve;
Molarity = [tex]\frac{0.5}{0.3}[/tex] = 1.7M
When 8.0 moles of chromium react, how many moles of chromium (lll) oxide are produced?
Moles of chromium (lll) oxide produced : 4 moles
Further explanationThe reaction equation is the chemical formula of reagents and product substances
A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.
Reaction
4Cr+3O₂⇒2Cr₂O₃
moles of Cr=8 moles
From the equation, mol ratio Cr : Cr₂O₃ = 4 : 2, so mol Cr₂O₃ :
[tex]\tt \dfrac{2}{4}\times 8=4~moles[/tex]
How do the number of protons, rumber of neutrons, and the mass number relate to each other
Answer:
Protons are the atomic number and for each element they never change.
Electrons are equal to the atomic number unless it is an Ion (Positive charge means it has less negative means it has more)
Mass number is Protons+Nuetrons
Explanation:
70% of rubbing alcohol is made up of water & alcohol that is used as antiseptic and disinfectant. Which of the following is the solute?
a. 30 parts alcohol
b. 70 parts water
c. 30 parts water
d. 70 parts alcohol
Answer:
choose a. 30 parts alcohol
How can biologic weathering result in chemical erosion?
plants transpire water vapor
bacteria release acids and other agents that break down rock
large herds trample rocks and break up soil
roots loosen soil and break rocks
Answer:
bacteria release acids and other agents that break down rock
Explanation:
One of the ways in which biological weathering results in chemical erosions is through bacteria releasing acids and other agents to break down a rock.
Weathering is defined as the physical disintegration and chemical decomposition of rocks to form sediments and soils.
The process of erosion removes the weathered materials from the earth surface.
Chemical weathering involves the decay of rocks by chemical means.
The bacteria is a biological organismAs it releases its acids and the rocks begin to break down, biological weathering takes placeswhy does a 30-kg barbell have more inertia than a 10-kg barbell
Please help!!!!!!!!!!!
Answer:
b
Explanation:
and if that wrong let me know cause jm my science class its b
A student used a pipette to add 25.0 cm of KOH of unknown concentration to
a conical flask.
The student carried out a titration experiment to find the volume of 0.150 mol/dmº
H2SO4 needed to neutralise the KOH.
The student found that, on average, 17.20 cm of the H2SO4 solution was
required for neutralisation.
Calculate the concentration of the KOH solution.
The concentration of the KOH solution = 0.2064 M
Further explanationTitration is a procedure for determining the concentration of a solution (analyte) by reacting with another solution whose known concentration (usually a standard solution) is called the titrant. Determination of the endpoint/equivalence point of the reaction can use indicators according to the appropriate pH range
Acid-base titration formula
Ma Va. na = Mb. Vb. nb
Ma, Mb = acid base concentration
Va, Vb = acid base volume
na, nb = acid base valence (number of ions H+/OH-)
a=H₂SO4(valence = 2, H₂SO4⇒2H⁺+SO₄²⁻, 2 ions H⁺)
b=KOH(valence = 1, KOH⇒K⁺+OH⁻, 1 ion OH⁻)
Ma = 0.15 M
Va = 17.2 cm³
Vb=25 cm³
The concentration of the KOH(Mb) :
[tex]\tt 0.15\times 17.2\times 2=Mb\times 25\times 1\\\\Mb=0.2064[/tex]