Answer:
They work in unision
Explanation:
The skeletal system is the framework our muscular system is attached to. The muscular system also allows the bones to move through contracting and extending. Although both would be useless without the nervous which sends impulses that tell the muscles to contract and extend.
Answer:
The person above is correct!
Explanation:
It graded it 100%.
13. (03.02 LC)
Which layer is between the crust and the asthenosphere? (7 points)
O LIthosphere
O Mesosphere
O Outer core
O Inner core
When evaluating a paper delivery, a homeowner would be most concerned about ____. a. the accuracy of the throws c. the speed of the throws b. the precision of the throws d. the acceleration of the throws Please select the best answer from the choices provided
Answer:
b. the precision of the throws
Explanation:
When dealing with paper delivery homeowners are mainly concerned about the precision of the throws. They technically want the paper to land directly on their front door. Landing there, the paper will be protected from the rain and be visible for the homeowner to easily see it and pick it up in the morning when they wake up. Bad precision can lead the paper to fall into a puddle or on the grass where it will get wet and become useless or even end up breaking a window or other fragile items.
What would be the volume, in liters measured at STP, of 0.56 moles of carbon monoxide?
Answer:
"This conversions relies on the fact that a mole of gas at STP has a volume of 22.4 L. It is important to note, however, that if the conditions of the gas are different this conversion will NOT work. Under those conditions you must use the ideal gas law to convert between moles and liters."
true or false. sound waves are reflected off of soft surfaces
Answer:
false
Explanation:
soft surfaces absorb sound. :)
Answer:
FALSE
FALSE FALSE FALSE FALSE FALSE
Explanation:
What group would this element be in?
An object has a momentum of 5 kg m/s and a mass of 2 kg. How fast is it moving?
Answer:
2.5 meter per second
Explanation:
momentum = mass multiplied by velocity
please mark me brainliest
What makes viruses so dangerous but vaccines so important? i am struggling lol
Answer:
viruses can kill you vaccines can save your life.
Explanation:
Answer:
The effect of leaky vaccines on how disease spreads is explained by the “imperfect-vaccine hypothesis”. It holds that, without vaccination, a very virulent virus can get into a population and kill infected hosts (people or animals) very quickly – before they have a chance to spread it. This means that the virus will die out very quickly too, as all potential hosts will be dead or immune to it.
Explanation:
Which answer correctly identifies the five levels of cell organization from simple to most complex A-bone cell, bone tissue, femur, skeleton, dog B-dog, skeleton, femur, bone tissue, bone cell C-bone tissue, dog, bone cell, femur, skeleton
Answer:
A-bone cell, bone cell C-bone tissue, bone cell bone tissue, femur, skeleton, dog B-dog.
Explanation:
It is ordered from the smallest unit (tissue microstructure) to a tissue or organ that are considered macrotisular structures.
ASAP please and thankyou
Options:
pollen
pistil
purple
white
Answer:
pistil
Explanation:
A substance has a mass of 100 g and a volume of 10 mL. What is the
density of the substance? *
0 0.05 g/mL
0 2.0 g/mL
0 10 g/mL
0 20 g/mL
Answer:
10 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question we have
[tex]denstity = \frac{100}{10} \\ [/tex]
We have the final answer as
10 g/mLHope this helps you
Answer:
thanks
Explanation:
The vertical columns (top to bottom) on the periodic table are called
Answer:
group
Explanation:
the rows are called periods
groups 1-8
3Fe + 4H2O ‐----> Fe3O4 + 4H2
10 g of water vapour are passed on 16.8 g of iron which is heated till redness find the limiting reactant
The limiting reactant : Fe
Further explanationReaction
3Fe + 4H₂O ⇒ Fe₃O₄ + 4H₂
mass of H₂O = 10 g
mol H₂O (MW=18 g/mol) :
[tex]\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{10}{18}=0.56[/tex]
mass of Fe = 16.8 g
mol Fe(MW=56 g/mol) :
[tex]\tt mol=\dfrac{16.8}{56}=0.3[/tex]
Limiting reactant : the smallest ratio between mol : reaction coefficient
Fe :
[tex]\tt \dfrac{0.3}{3}=0.1[/tex]
H₂O :
[tex]\tt \dfrac{0.56}{4}=0.14[/tex]
Fe as limiting reactant
At 35°C and 2 atm of pressure, the volume of gas is 200 ml. If the temperature changes to
55°C and the pressure changes to 4 atm, what is the new volume of gas?
Answer:
V₂ = 106.5 mL
Explanation:
Given data:
Initial volume =200 mL
Initial pressure = 2 atm
Initial temperature = 35 °C (35 +273 = 308 K)
Final temperature = 55°C (55+273 = 328 K)
Final volume = ?
Final pressure = 4 atm
Formula:
P₁V₁/T₁ = P₂V₂/T₂
P₁ = Initial pressure
V₁ = Initial volume
T₁ = Initial temperature
P₂ = Final pressure
V₂ = Final volume
T₂ = Final temperature
Solution:
V₂ = P₁V₁ T₂/ T₁ P₂
V₂ = 2 atm ×200 mL × 328 K / 308 K ×4 atm
V₂ = 131200 atm .mL. K / 1232 K.atm
V₂ = 106.5 mL
true or false: u find soil rich in humus in horizon c
Answer:
True
Explanation:
which type of intermolecular force in water creates the surface tension that allows the stones to skip across the top of the water
Answer:
Hydrogen bonding
Explanation:
Water is a compound found readily in nature. It is made up of interatomic forces of covalent bonds that connects the hydrogen and oxygen bonds together in a definite ratio.
The intermolecular forces are responsible for the physical properties of substances. These forces allows a compound to behave in certain ways. In water, the intermolecular bonding present are the very strong hydrogen bonds. For this bond type, the hydrogen of one water molecule is firmly attached to the oxygen of another water molecule. The bonds are very strong forces.Double-Replacement Reactions
LiCl + CaBr2 →
Cr(OH)3 + Na2CO3 →
Sr3N2 + KClO3 →
Fe(NO3)2 + AlPO4 →
CuSO4 + AgNO3 →
HCl + Ba(OH)2 →
CsCN + SnF4 →
(NH4)2S + Mg(NO3)2 →
Na2CrO4 + Mo(OH)3 →
Ni(C2H3O2)2 + H3PO4 →
Answer:
(1) LiCl + CaBr2 → CaCl2 + LiBr
Balanced
2LiCl + CaBr2 → CaCl2 + 2LiBr
(2) Cr(OH)3 + Na2CO3 → NaOH + Cr2(CO3)3
Balanced
2Cr(OH)3 + 3Na2CO3 → 6NaOH + Cr2(CO3)3
(3) Sr3N2 + KClO3 → Sr(ClO3)2 + K3N
Balanced
Sr3N2 + 6KClO3 → 3Sr(ClO3)2 + 2K3N
(4) Fe(NO3)2 + AlPO4 → Fe3(PO4)2 + Al(NO3)3
Balanced
3Fe(NO3)2 + 2AlPO4 → Fe3(PO4)2 + 2Al(NO3)3
(5) CuSO4 + AgNO3 → Ag2SO4 + Cu(NO3)2
Balanced
CuSO4 + 2AgNO3 → Ag2SO4 + Cu(NO3)2
(6) HCl + Ba(OH)2 → H2O + BaCl2
Balanced
2HCl + Ba(OH)2 → 2H2O + BaCl2
(7) CsCN + SnF4 → CsF + Sn(CN)4
Balanced
4CsCN + SnF4 → 4CsF + Sn(CN)4
(8) (NH4)2S + Mg(NO3)2 → MgS + NH4NO3
Balanced
(NH4)2S + Mg(NO3)2 → MgS + 2NH4NO3
(9) Na2CrO4 + Mo(OH)3 → NaOH + Mo2(CrO4)3
Balanced
3Na2CrO4 + 2Mo(OH)3 → 6NaOH + Mo2(CrO4)3
(10) Ni(C2H3O2)2 + H3PO4 → Ni3(PO4)2 + C2H4O2
Balanced
3Ni(C2H3O2)2 + 2H3PO4 → Ni3(PO4)2 + 6C2H4O2
What did Scientist found that surprised them after making a map of the ocean floor?
a
Subduction
b
Pangea
c
Mid-Ocean ridge
d
Volcanoes
Answer:
C
Explanation:
In 1953 they made soundings and discovered the ocean ridges
student carries out a titration to determine the concentration of a solution of
nitric acid. She titrates the solution of nitric acid against a standard solution
of sodium hydroxide with a known concentration of 0.0998 mol/dm². She
finds that 21.80 cm of the nitric acid solution is needed to exactly neutralise
25.0 cm of the sodium hydroxide solution.
Calculate the concentration of the nitric acid solution. Give your answer to
three significant figures.
The equation for the neutralisation reaction is
HNO3 + NaOH → NaNO3 + H2O
The concentration of the Nitric acid solution : 0.114 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
Titrations can be acid-base titration, depositional titration, and redox titration. An acid-base titration is the principle of neutralization of acids and bases
Reaction
HNO₃ + NaOH → NaNO₃ + H₂O
Concentration a standard solution of sodium hydroxide : 0.0998 mol/dm³ , and the volume = 25 cm³
moles NaOH=
[tex]\tt mol=M\times V\\\\mol=0.0998\times 25\\\\mol=2.495~mlmoles[/tex]
From the equation, mol ratio HNO₃ : NaOH = 1 : 1, so mol HNO₃ = mol NaOH=2.495 mlmoles
The volume of HNO₃ = 21.8 cm³, so the concentration :
[tex]\tt M=\dfrac{n}{V}\\\\M=\dfrac{2.495}{21.8}\\\\M=0.114[/tex]
The concentration of the nitric acid solution is 0.11445 mol/dm³
From the question,
We are to calculate the concentration of the nitric acid solution
The given balanced chemical equation for the reaction is
HNO₃ + NaOH → NaNO₃ + H₂O
This means 1 mole of HNO₃ is needed to completely neutralize 1 mole of NaOH
Using the formula
[tex]\frac{C_{A}V_{A} }{C_{B}V_{B}} = \frac{n_{A}}{n_{B}}[/tex]
Where [tex]C_{A}[/tex] is the concentration of acid
[tex]C_{B}[/tex] is the concentration of base
[tex]V_{A}[/tex] is the volume of acid
[tex]V_{B}[/tex] is the volume of base
[tex]n_{A}[/tex] is the mole ratio of acid
[tex]n_{B}[/tex] is the mole ratio of base
From the given information
[tex]C_{B}= 0.0998\ mol/dm^{3}[/tex]
[tex]V_{A} = 21.80 \ cm^{3}[/tex]
[tex]V_{B} = 25.0 \ cm^{3}[/tex]
From the balanced chemical equation
[tex]n_{A} = 1[/tex]
[tex]n_{B} =1[/tex]
Putting the parameters into the formula, we get
[tex]\frac{C_{A} \times 21.80 }{0.0998 \times 25.0} = \frac{1}{1}[/tex]
Then,
[tex]C_{A} \times 21.80=0.0998 \times 25.0[/tex]
∴ [tex]C_{A}=\frac{0.0998 \times 25.0}{21.80}[/tex]
[tex]C_{A} =\frac{2.495}{21.80}[/tex]
[tex]C_{A} = 0.11445 \ mol/dm^{3}[/tex]
Hence, the concentration of the nitric acid solution is 0.11445 mol/dm³
Learn more here: https://brainly.com/question/14014457
5)
Why do elements in the same family generally have similar properties?
Answer: Elements in the same family generally have similar properties because they contain the same number of the electrons, for instance.
Hope this helped!
define the molecular of a substance
Answer:
A molecule is an electrically neutral group of two or more atoms held together by chemical bonds. Molecules are distinguished from ions by their lack of electrical charge. hope this helps :)
FIRST PERSON ANSWER GETS PTS, BRAINLIEST, And SUPRISE
What is needed for a wind farm to be effective
Answer:
for a effective wind farm you would need wind turbines a windy area a rotation powered generator and something to use it on
Explanation:
A substance dissolved in a liquid is a
solution
evaporation
vein
geode
The tire pressure in a automobile tire was 2.38 atm when the tire was at 26°C. As the automobile drove for several hours, the temperature of the tire increased to 93°C.
35 atm
41.0 atm
2.91 atm
3.09 atm
33 atm
Answer:
The answer is 2.91 atm
Explanation:
similar
ffer.
jum
eride
Which statements are true regarding these two
compounds? Check all that apply.
Acetone is a covalent compound, while
sodium chloride is an ionic compound.
Ionic compounds conduct electricity well in
their solid (pure) form.'
Covalent compounds have weak attractions
between molecules, resulting in low melting
points.
ECI
1°C
olid
Answer:
-Acetone is a covalent compound, while sodium chloride is an ionic compound
-covalent compounds have weak attractions between molecules, resulting in low melting points
Explanation:
Answer: A and C mah dudes
Explanation: Edgy 2020 <3
How many atoms are in 1.5 moles of calcium
Answer:
9.0×10^23
Explanation:
1.5mols x [tex]\frac{6.022*10^{23}atoms}{1mol}[/tex]=9.0×10^23
Green energy may also be referred to as renewable or clean energy.
True
False
In a double bond, two atoms share a total of _____ electrons. a two b three c four d six
Answer:
C: 4
Explanation:
In every single covalent bond, each atom shares one electron. 1 + 1 = 2. A double bond is just two bonds so, 2 x 2 = 4.
A child on a high dive has a mass of 40 kilograms. If the high dive is 10 meters in the air, what is the potential energy?
3920 Joules
400 Joules
4 Joules
Answer:
3920 JoulesExplanation:
The potential energy of a body can be found by using the formula
PE = mgh
where
m is the mass
h is the height
g is the acceleration due to gravity which is 9.8 m/s²
From the question we have
PE = 40 × 9.8 × 10
We have the final answer as
3920 JHope this helps you
Any element above 92 on the
periodic table has to be constructed
in a lab.
A.False
B.True
answer: it should be false