Explanation:
carbon dioxide is it gas that is present in the air plants collect carbon dioxide through tiny holes called Stomates. during the process of photosynthesis, Stomates are also used to expel a gas called oxygen. Oxygen is very important for animals like human -- we need it to breathe !
What historical event of commercial interest triggered investigation in the science of steam?
Answer: Photosynthesis
Explanation:
Why is an occluded front considered the most complex type of front?
Answer:
folloow mw tiktokjonathan_dion21 for a free cookie
Explanation:
how many molecules of water are found in 1.5mol of water ?
Answer:
9.033×10^23 Molecules
Explanation:
We are given,
No.of moles of water = 1.5 moles
The approximate value of Avagadro's Constant =6.022×10^23 particles
Hence,
As we know that,
No.of particles = No.of moles × Avagadro's Constant
Here,
No. Of Water Molecules in 1.5 moles of water = 1.5×6.022×10^23
No.of Water Molecules in 1.5 molesof water=9.033×10^23 Molecules
the side chains of amino acids may contain..
a) acidic and basic groups.
b) polar groups.
c) nonpolar groups.
d) All of the above
Answer:
(d) All of the above
Explanation:
Acidic:-
Glutamic Acid
Basic:-
Lysine
Polar:-
Histidine
NonPolar:-
Leucine
The side chain of amino acids may contain
d) all of the above
Amino acids are the building blocks of proteins.
Amino acids:Amino acids are the building blocks of proteins and play an important role in body functions. They are needed for vital processes like cell building and synthesis of hormones and neurotransmitters (brain chemicals). They may also be taken as supplements.
They contain acidic and basic groups, polar and non-polar groups as well.
Examples are Alanine, Arginine, Asparagine, etc.
Find more information about Amino acid here:
brainly.com/question/1302816
Explain Nuclear Fusion vs Gravity a.Gravity pushes outward and Nuclear fusion pushes inward. b.Both gravity and nuclear fusion push inward. c.Both gravity and nuclear fusion push outward. d.Nuclear fusion pushes outward, and gravity pushes inward.
Answer:
d.
Explanation:
The term known as "Nuclear Fusion" is a very important concept in chemistry and it is studied mostly under the topic or aspect of Chemistry known as or called radioactivity. Nuclear Fusion is the kind of reaction in which two or more atomic nucleus combines to for bigger ones.
There is a saying that there is no life without nuclear fusion because it is the reaction that causes the stars to have light.
Option 'd' is correct. This is what happens in stars in order for light to be produced that is the inward movement of gravity and the outward movement of nuclear fusion.
5) Determine the mass if lithium hydroxide that is produced when 12.87 g of lithium nitride reacts with
an excess of water according to the following process:
Li,N + 3 H2O + 3 LiOH + NH,
Answer:
Mass = 26.58 g
Explanation:
Given data:
Mass of lithium nitride = 12.87 g
Mass of lithium hydroxide produces = ?
Solution:
Chemical equation:
Li₃N + 3H₂O → 3LiOH + NH₃
Number of moles of of Li₃N:
Number of moles = mass/molar mass
Number of moles = 12.87 g/ 34.83 /mol
Number of moles = 0.37 mol
now we will compare the moles of lithium nitride with lithium hydroxide.
Li₃N : LiOH
1 : 3
0.37 : 3/1×0.37 = 1.11 mol
Mass of LiOH:
Mass = number of moles × molar mass
Mass = 1.11 mol × 23.95 g/mol
Mass = 26.58 g
The temperature of 25 g of water was raised from 10 oC to 60 oC. How many joules of heat was necessary to accomplish this?
Answer:
Hope this helps!
Explanation:
5. Which part makes up most of our blood vessels?
O a capillaries
Ob veins
O carteries
d. blood
Answer: a capillaries
Explanation:
How many grams of barium hydroxide are required to dissolve in 156 g of water to make a 0.247 m solution?
Molar mass of Ba(OH)2: 171.346
Explanation:
Moles of Barium hydroxide = 0.156dm³ * (0.247mol/dm³) = 0.0385mol.
Mass of Barium hydroxide = 0.0385mol * (171.346g/mol) = 6.60g.
Answer:
6.60
Explanation:
How many atoms of S are there in the reactants?
Sg + F2 ---> SFO
Answer:
One atom
Explanation:
Na+ is an ion give reasons
Answer:
Na+ represents a sodium atom that has lost an electron.
Explanation:
An atom that has gained or lost electrons is called an ion.
Answer:
I think because of the positive radical it's carrying
Which of these questions is testable in a scientific investigation?
A .Are plastics more toxic than wood when burned?B.Are mountains more beautiful than oceans?
C.Is science a better
subject to study than foreign language?
D.Does a red rose smell better than a pink rose?
Answer:
A
Explanation:
it is A because all of the other ones are opinions.
Answer:
A
Explanation:
Why do flowers have brightly-coloured petals
Answer:
Petals are modified leaves that surround the reproductive parts of flowers. They are often brightly colored or unusually shaped to attract pollinators. Together, all of the petals of a flower are called corolla.
What kind of bonding would exist between
sulfur and hydrogen?
Answer:
nonpolar covalent
Explanation:
Comparing their electronegativities will help determine the type of bond. Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons. The difference in electronegativity (ΔEN) is used to determine bond type. Hydrogen has an electronegativity of 2.20 and sulfur has 2.58. The difference is 0.38,so the electrons are shared in a nonpolar covalent bond.
Which laboratory activity involves a chemical change?
Answer:
It is the first one.
Explanation:
Because yeah.
Using the data below, calculate the enthalpy for the combustion of C to CO C(s) + O2(g)--> CO2 (g) ΔH1 = -393.5 kJ CO(g) + 1/2O2(g) -->CO2(g) ΔH2= -283.0kJ Target: C(s) + 1/2O2(g) --> CO(g) ΔH3=?? Group of answer choices
Answer:
ΔH = -110.5kJ
Explanation:
It is possible to obtain enthalpy of combustion of a particular reaction by the algebraic sum of similar reactions (Hess's law). Using:
1. C(s) + O₂(g) → CO₂(g) ΔH₁ = -393.5kJ
2. CO(g) + 1/2O₂(g) → CO₂(g) ΔH₂ = -283.0kJ
The sum of 1 -2 gives:
C(s) + O₂(g) + CO₂(g) → CO₂(g) + CO(g) + 1/2O₂(g)
C(s) + 1/2O₂(g) → CO(g) ΔH = -393.5kJ - (-283.0kJ) =
ΔH = -110.5kJwhat are the difference between an animal cell and plant cell
Answer:
ANIMAL CELL
Animal cells are generally small in size.
They don't have a cell wall
Except the protozoan Euglena, no animal cell possesses plastids.
Vacuoles in animal cells are many, small and temporary.
Animal cells have a single highly complex and prominent Golgi apparatus.
Animal cells have centrosome and centrioles.
PLANT CELL
Plant cells are larger than animal cells.
The plasma membrane of plant cells is surrounded by a rigid cell wall of cellulose.
They have Plastids
Most mature plant cells have a permanent and large central sap vacuole.
Plant cells have many simpler units of Golgi apparatus, called dictyosomes.
Plant cells lack centrosome and centrioles.
Hope this helps!
Answer: Differences between animal and plant cells :
Animal cell :- Animal cells are generally small in size. Cell wall is absent. Except the protozoan Euglena, no animal cell possesses plastids. Vacuoles in animal cells are many, small and temporary. Animal cells have a single highly complex and prominent Golgi apparatus. Animal cells have centrosome and centrioles. Plant cell :- Plant cells are larger than animal cells. The plasma membrane of plant cells is surrounded by a rigid cell wall of cellulose. Plastids are present. Most mature plant cells have a permanent and large central sap vacuole. Plant cells have many simpler units of Golgi apparatus, called dictyosomes. Plant cells lack centrosome and centrioles.
Explanation:
QUICK
Which of these is a ball and stick model?
The element hydrogen contains particles of
OA. water and carbon.
OB. hydrogen only.
OC. hydrogen, oxygen, and nitrogen. OD. oxygen and carbon.
Please HELP!
Answer:
B. hydrogen only.
Explanation:
The element hydrogen is a made up of only hydrogen atoms which are the particles in the element.
Hydrogen is an element. It has distinct hydrogen atoms that typifies it.
Water and carbon is not a hydrogen element. They contain hydrogen, oxygen and carbon.An element is a distinct substance that is made up of one kind of atom. The only kind of atom in element hydrogen is those hydrogen itself.
A compound consists of 50.04% carbon, 5.59% hydrogen, and 44.37% oxygen. What is the empirical formula of this compound?
The empirical formula of the compound is C₃H₄O₂
From the question given above, the following data were obtained:
Carbon = 50.04%
Hydrogen = 5.59%
Oxygen = 44.37%
Empirical formula = ?Divide by their molar mass
C = 50.04 / 12 = 4.17
H = 5.59 / 1 = 5.59
O = 44.37 / 16 = 2.773
Divide by the smallest
C = 4.17 / 2.773 = 1.5
H = 5.59 / 2.773 = 2
O = 2.773 / 2.773 = 1
Multiply by 2 to express in whole number
C = 1.5 × 2 = 3
H = 2 × 2 = 4
O = 1 × 2 = 2
Therefore, the empirical formula of the compound is C₃H₄O₂
Learn more: https://brainly.com/question/15907539
Questlon 7 of 10
Which object will require the greatest amount of force to change its motion?
O A. A 72 kg object moving 25 m/s
O B. A 55 kg object moving 32 m/s
OC. A 75 kg object moving 22 m/s
O D. A 63 kg object moving 27 m/s
A 72 kg object moving 25 m/s will require the greatest amount of force
Further explanationGiven
mass of object and the velocity
Required
the greatest amount of force
Solution
Newton's 2nd law :
∑F = m. a
F = force, N
m = mass = kg
a = acceleration due to gravity, m / s²
Assuming the object is moving from rest (vo = 0) and the time needed to reach its velocity is the same (delta t = equal), it can be formulated:
[tex]\tt \Sum F=m.\dfrac{v_f-v_i}{\Delta t}\\\\F=m.\dfrac{v_f}{\Delta t}[/tex]
So the force on an object depends on the product of its mass and velocity
Or if we use the impulse and momentum formula
[tex]\tt F.\Delta t=m(v_f-v_i)\\\\F,\approx m.v_f[/tex]
So that we determine which is the greatest from the multiplication of mass and velocity will produce the greatest force as well
A 72 x 25 = 1800
B. 55 x 32 =1760
C. 75 x 22 = 1650
D.63 x 27 = 1701
Option A has the greatest force
What is the correct formula for combining Mg2+ and Br1+
Answer: The correct formula is [tex]MgBr_2[/tex]
Explanation:
For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
Here magnesium is having an oxidation state of +2 called as [tex]Mg^{2+}[/tex] cation and bromine [tex]Br^{-}[/tex] is an anion with oxidation state of -1. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral [tex]MgBr_2[/tex].
The cations and anions being oppositely charged attract each other through strong coloumbic forces and form an ionic bond.
Evaluate the carbon dioxide molecule. Explain how to determine if double or triple bonds exist in the molecule.
Answer:
It contain double Bond.
Explanation:
To determine weather the bond is double or triple simply check the electron involved in mutual sharing of an electron if 2 electron takes parts it said to be double or if 3 it said to be triple.
By using prefixes, we can write 32 × 10-10 kg as
Answer:
3.2 micro gram
Explanation:
because
1kg=1000g
32×10^-10kg=?
=3.2×10^-6g
1g=10^-6micro gram
3.2×10^-6g=?
=3.2 micro gram.
where g- gram
kg- kilogram
what is the specific heat of the following materials:
aluminum
water
rubbing alcohol
cooking oil
Answer:the sun
Explanation:leqjs
Let's look it up
Aluminium:-
0.89 J/kg°CWater:-
4.186J/g°CAlcohol:-
0.588cal/g°CCooking oil:-
1.67Kj/kg°CChlorine has two natural isotopes, chlorine-35 and chlorine-37.
Describe the effect these isotopes have on the relative atomic mass of chlorine
Answer:
The relative atomic mass of chlorine depends on the ratio between the abundance of these two naturally-occurring isotopes.
Explanation:
The relative atomic mass of an element is a weighted average of the atomic mass of its naturally-occurring isotopes. The relative abundance of each isotope gives its weight in this weighted average.
For these two naturally-occurring isotopes of chlorine:
The relative atomic mass of [tex]^{35}{\rm Cl}[/tex] is approximately [tex]34.969[/tex] daltons. The relative abundance of this isotope in nature is approximately [tex]0.758[/tex]. The relative atomic mass [tex]^{37}{\rm Cl}[/tex] is approximately [tex]36.966[/tex] daltons. The relative abundance of this isotope in nature is approximately [tex]0.242[/tex].[tex]\begin{array}{|c|c|c|}\cline{1-3} \text{Isotope} & \text{Atomic Mass} & \text{Relative Abundance}\\ \cline{1-3} ^{35}{\rm Cl} & \approx 34.968\; \rm Da} & \approx 0.758 \\ \cline{1-3} ^{37}{\rm Cl} & \approx 36.966\; \rm Da & \approx 0.242 \\ \cline{1-3}\end{array}[/tex].
[tex]\begin{aligned}&\text{relative atomic mass of Cl} \\ &= \text{atomic mass of $^{35}{\rm Cl}$} \times \text{relative abundance of $^{35}{\rm Cl}$} \\&\quad + \text{atomic mass of $^{37}{\rm Cl}$} \times \text{relative abundance of $^{37}{\rm Cl}$} \\ &\approx 34.968\; \rm Da \times 0.758 + 36.966\; \rm Da \times 0.242 \\ &\approx 35.45\; \rm Da \end{aligned}[/tex].
The relative abundance of [tex]^{35}{\rm Cl}[/tex] is much higher than that of [tex]^{37}{\rm Cl}[/tex]. Consequently, the relative atomic mass of the element [tex]\rm Cl[/tex] is closer to the atomic mass of [tex]^{35}{\rm Cl}\![/tex] than that of [tex]^{37}{\rm Cl}\![/tex].
One atom of element A bonds with element E.
Answer:
Ae4
Explanation:
which virtually showed the reaction between group 4 element and group 7 element
How many joules must be added to a 1000 g iron skillet to increase its temperature
from 25°C to 250°C? The specific heat of iron is 0.449 J/gºC.
A) 449 J
B) 101,025 J
C) 50,000 J
D) 112,250 J
Answer:
B) 101,025
Explanation:
1000g * 0.449 J/g Celsius * 225 Celsius = 101,025
I got 225C from 250C - 25C
Pls Help me I am stuck on this question.
Answer:
compound is the answer
What is the average atomic mass of strontium
The answer is 87.62 u
Answer:
Atomic number: 38
Electrons per shell: 2,8,18,8,2
Symbol: Sr
