invertebrate is a animal that does not have a back bone but may have a exoskeleton examples could be earthworm, jellyfish, snail and a spider because it has a exoskeleton a hard outer shell hope this helps
Vertebrates have a back bone like sea turtles , fish ,foxes and humans.
9. Which of these is not a mixture? *
Solution
Alloy
Amalgam
They are all mixtures.
Answer:
They are all mixture
Explanation:
last option
which animal takes on the temperature of their surroundings and does not use food energy to keep warm
write an equation illustrating the condensation of p-diaminobenzene with the acid chloride of oxalic acid (cocl)2
Answer:
Explanation:
p-diaminobenzene is popularly known as p-phenylenediamine. It undergoes a condensation reaction with metal halides. As a white solid (p-diaminobenzene), it can be darkened by air oxidation. The reaction showing the condensation of p-phenylenediamine with (CoCl)₂ can be seen in the image attached below.
What Is an example of weather?
A. The average rainfall in Arizona over the pervious three months
B. The increase in temperature over North America over the past decade
C. The time for high tide in Daytona Beach today
D. The temperature and wind speed in Philadelphia today
please help..............
Answer:
hope this help
Explanation:
change: volume of solid , volume of liquid , the volume of gases
not change: the shape of solid , the shape of liquid , the shape of gases
QUESTION 4
How many significant figures are in the number 0.000020?
O A. 1
OB.2
O C.3
OD.4
Answer:
B) 2
Explanation:
There are two significant figures in given measurement,
2, 0
Significant figures:
1= The given measurement have four significant figures 1534.
2= All non-zero digits are consider significant figures like 1, 2, 3, 4, 5, 6, 7, 8, 9.
3= Leading zeros are not consider as a significant figures. e.g. 0.03 in this number only one significant figure present which is 3.
4= Zero between the non zero digits are consider significant like 107 consist of three significant figures.
5= The zeros at the right side e.g 2400 are also significant. There are four significant figures are present.
What happens at the anode in an electrolytic cell?
A. Turning an ion into an uncharged atom
B. Melting
C. Reduction
D. Oxidation
Answer:
D. Oxidation
Explanation:
In an electrolytic cell, oxidation (the loss of electrons) takes place at the anode. At the cathode reduction takes place.
A mnemonic technique that could be used is that the process that starts with a vowel (Oxidation) takes place at the place that also starts with a vowel (Anode).
at the molecular level what form of energy do the molecules have?
Answer:
kinetic energy I think so
The form of energy molecules have at the molecular level is Kinetic energy.
Kinetic energy is defined as the energy possessed by a body as a result of its motion or movement.
Molecules interact with one another through various movements that occur
within them. This happens to aid the formation of new substances in the
ecosystem. The three states of matter exhibit varying degree of movement
within its molecules.
The energy is usually in the form of chemical energy also and is the reason
why kinetic energy is the most suitable choice.
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Is this structure named correctly???
Pls answer me fast guys!!
Answer:
No; According to the IUPAC , it should be
3-bromopentan-2-olWhat is the wavelength of light emitted when the electron in a hydrogen atom undergoes transition from an energy level with n = 4 to an energy level with n = 2?
Answer:
[tex]4.86\times10^{-7}\ \text{m}[/tex]
Explanation:
R = Rydberg constant = [tex]1.09677583\times 10^7\ \text{m}^{-1}[/tex]
[tex]n_1[/tex] = Principal quantum number of an energy level = 2
[tex]n_2[/tex] = Principal quantum number of an energy level for the atomic electron transition = 4
Wavelength is given by the Rydberg formula
[tex]\lambda^{-1}=R\left(\dfrac{1}{n_1^2}-\dfrac{1}{n_2^2}\right)\\\Rightarrow \lambda^{-1}=1.09677583\times 10^7\left(\dfrac{1}{2^2}-\dfrac{1}{4^2}\right)\\\Rightarrow \lambda=\left(1.09677583\times 10^7\left(\dfrac{1}{2^2}-\dfrac{1}{4^2}\right)\right)^{-1}\\\Rightarrow \lambda=4.86\times10^{-7}\ \text{m}[/tex]
The wavelength of the light emitted is [tex]4.86\times10^{-7}\ \text{m}[/tex].
flourine is more reactive than chlorine . why ? with short reason.
Answer:
Electronegativity is probably the biggest thing that plays into reactivity. Therefore, since fluorine has a higher electronegativity than chlorine, fluorine is more reactive.
Explanation:
I got it right
The atomic number tells the number of
Question 4
Being Left Handed is a recessive trait so it would be represented by two lowercase letters like (hh)
Your answer:
O
True
False
Answer:
True
Explanation:
Find the molar mass of C3H60
Answer:
The molar mass and molecular weight of C3H6O is 58.0791.
Explanation:
How many protons, neutrons, and electrons does Sr^2+
Answer:
36 electrons
Explanation:
The # of protons is always equal to the atomic number. In the case of Sr (Strontium), it is 38 protons.
The 2+ at the end means that it has a charge of +2, meaning that it LOST two electrons to become a cation with a full valence shell. So, 38 - 2 = 36 electrons
Answer:
38 protons 36 electrons 30 neutron because of 29 isotope
(I will give a Brainliest)
How would you describe the change in the arrangement of particles as heat energy and
temperature increase?
(5) Use scientific notation, make the following conversions:
6.20 km to m
Answer:
6200 meters
Explanation:
To convert from km to m you have to multiply the number by a thousand
Answer:
6.2×10^3 m
Explanation:
6.20×1000=6200m
In scientific notation 6200 = 6.2×10^3
(b) What is the solubility of lead chromate in moles per dmcube ksp
for PbC10,=2.8x10*-13 mole/dmº
The solubility of lead chromate : s= 5.29 x 10⁻⁷ mol/L
Further explanationGiven
Ksp for PbCl,=2.8x10*-13 mole/dmº
PbCrO4
Required
The solubility
Solution
P b C r O ₄ ( s ) ⇌ P b²⁺( a q) +C r O ₄ ⁻²( a q )
s s s
s= solubility
Ksp P b C r O ₄ = s²
K s p = [ P b ²⁺] [C r O ₄ ⁻² ]= 2.8x10⁻¹³
s = √2.8x10⁻¹³
s= 5.29 x 10⁻⁷ mol/L
If 10.88 moles of NH3 were produced, how many moles of N2 would be
required?
Answer:
5.44 moles of nitrogen required.
Explanation:
Given data:
Number of moles of NH₃ = 10.88 mol
Moles of N₂ required = ?
Solution:
Chemical equation:
N₂ + 3H₂ → 2NH₃
Now we will compare the moles nitrogen and hydrogen.
NH₃ : N₂
2 : 1
10.88 : 1/2×10.88 = 5.44mol
5.44 moles of nitrogen required.
Identify the type of solid from the description. Select from the following choices: metallic solid, network solid, molecular solid, ionic solid, or amorphous solid
Identify the type of solid from the description. Select from the following choices: metallic solid, network solid, molecular solid, ionic solid, or amorphous solid. a. This solid is ductile and conducts electricity.b. This solid is not conductive and has a low melting point.
Answer:
See explanation
Explanation:
A is a Metallic Solid
Let us look again at the physical properties of metals;
Metals are
DuctileMalleableSonorousHigh melting pointConducts electricityWe can now see that both ductility and electrical conductivity are metallic properties.
B is a Molecular solid
Molecules are formed when atoms share electrons. In molecules, there are no free electrons hence molecules do not conduct electricity.
Secondly, molecules are held together in the solid state by weak dispersion forces hence molecular solids have a low melting point.
which element can form an oxide with the general formula m2o or mo where m is a metal
Answer:
Because the compound has a formula of M2O, the number of valence electrons of M should be 1. Therefore, (1) Group 1 is the correct answer because elements in group 1 have 1 valence electron.
Explanation:
electromagnetic waves can travel through matter as well as across space.
True or false
true becouse i sed so
Which organisms are producers? (SELECT ALL THAT APPLY.)
grass
bear
human
oak tree
fungus
Answer:
Grass
Oak tree
Explanation:
Bear and human are definitely not and fungus are decomposers.
(I will give a brainliest) State the relationship between phase changes and temperature
Answer:
The relationship is the "variation of vapour pressure with temperature" or " the effect of vapour pressure on the melting and boiling points in a phase"
A 4.0g Glass was heated from 5°C to 45°C after absorbing 32 J of heat. What is the specific heat of the glass? 
Answer:
[tex]c=0.2\ J/g^{\circ} C[/tex]
Explanation:
Given that,
Mass of a glass, m = 4 g
Initial temperature, [tex]T_i=5^{\circ} C[/tex]
Final temperature, [tex]T_f=45^{\circ} C[/tex]
Heat absorbed, Q = 32 J
We need to find the specific heat of the glass. The formula for the heat absorbed is given by :
[tex]Q=mc\Delta T\\\\c=\dfrac{Q}{m\Delta T}\\\\c=\dfrac{32\ J}{4\ g\times (45-5)^{\circ} C}\\\\=0.2\ J/g^{\circ} C[/tex]
So, the required specific heat of the glass is [tex]0.2\ J/g^{\circ} C[/tex].
A Gold ring is a what?
Element
Compound
Colloid
Alloy
Answer: Alloy
Explanation: gold is an alloy, or mixture of metals
A compound is found to contain 26.73 % phosphorus, 12.09 % nitrogen, and 61.18 % chlorine by mass. What is the empirical formula for this compound
Answer:
[tex]PNCl_2[/tex]
Explanation:
Hello!
In this case, when determining empirical formulas by knowing the by-mass percent, we first must assume the percentages as masses so we can compute the moles of each element:
[tex]n_P=\frac{26.73g}{30.97g/mol}=0.863mol\\\\n_N=\frac{12.09g}{14.01g/mol}=0.863mol\\\\n_C_l=\frac{61.18g}{35.45g/mol}=1.726mol[/tex]
Now, for the determination of the subscript of each element in the empirical formula, we divide the moles by the fewest moles (P or N):
[tex]P=\frac{0.863mol}{0.863mol}=1\\\\N= \frac{0.863mol}{0.863mol}=1\\\\Cl=\frac{1.726mol}{0.863mol}2[/tex]
Thus, the empirical formula is:
[tex]PNCl_2[/tex]
Regards!
Which is one piece of information that "9” gives about an atom of fluorine?
The atomic mass is different than the atomic number, and the number of neutrons is the difference between the atomic mass and the atomic number.
the atomic number
the atomic mass
the mass of protons
the number of neutrons
Answer:
The Atomic Number
Explanation:
1
Give two reasons that show sugar is a compound
2
What is the difference between carbon (charcoal and suga? Compra ad 1
What is the standard reduction potential, E, for the half-reaction Al(aq) +
3e→ Al(s)?
OA. -0.76 V
OB. -1.68 V
Oc. 2.37 V
OD. 2.71 V
SUBMIT
The standard reduction potential for the given question is-1.68 V, under the condition that the given half-reaction is Al(aq) +3e→ Al(s), then the required answer to the given question is Option B.
The standard reduction potential refers to the potential difference comparing the standard hydrogen electrode (SHE) and the half-reaction. The (SHE) possess a standard reduction potential of 0 V at all temperatures.
Hence, the standard reduction potential for the half-reaction Al(aq) + 3e→ Al(s) can be evaluated as follows
E°(Al₃⁺(aq) + 3e⁻ → Al(s)) - E°(H⁺(aq) + e⁻ → 1/2H₂(g))
= -1.66 V - 0 V
= -1.66 V
≈ -1.68 V
A half-reaction can occur for either the oxidation or reduction reaction component of a redox reaction. It projects the change in oxidation states of the substances involved. Half-reactions are applied to describe the processes in an electrochemical cell, in which one metal is oxidized at the anode and another metal is reduced at the cathode.
To learn more about half-reaction
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Answer:
B
Explanation:
-1.68 V
