Answer: chemical substance
Explanation:
Write functions of the following parts of the digestive system.
1:Large Intestine
2:Mouth
3:Small Intestine
4:Stomach
Answer:
1. absorb water,get rid of of waste products
2.chewing
3. absorbing nutrients
4. holding the food, breakdown of food
how many moles are present in 100 grams of potassium?
Answer:
39.0983.
Explanation:
An element contains only one kind of
A. particle. B. property. C. protein. D. raw material.
Answer:
A
Explanation:
an element contains only one kind of particle
Can a mixture be in a solid as well as a liquid form?
Answer:
I dont think so
Explanation:
A mixture of solid and liquid can be found in a homogeneous solution or heterogeneous mixture.
What is a mixture?A mixture is composed of one or more pure substances in varying compositions.
A mixture of solid and liquid can be found in a homogeneous solution or heterogeneous mixture.
The liquid in which the solid substance is mixed or gets dissolved is known as a solvent. Whereas, the dissolving solid constituent is known as solute.
Yes, a mixture can be in a solid as well as a liquid form.
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Atoms are known to form charges due to their ability to gain and lose electrons in reactions. As a result, atoms become ions that are positively or negatively charged depending on the loss or gain of electrons. Which of the following atoms has a charge of +1 given the number of electrons?
a
Se: 36 electrons
b
S: 18 electrons
c
Na: 10 electrons
d
Cl: 18 electrons
Answer:
C
Explanation:
Na has an electron configuration of 2,8,1
it forms an ion by losing 1 electron thus gaining a 1+ charge
The atom with (+1) charge out given four atoms in sodium atom, Na:10 electrons.
Explanation:
An atom having more protons than electrons is called a cation. This type of ion is formed by losing electrons.An atom having more electrons than protons is called an anion. This type of ion is formed by gaining electrons.An atom of an element loses or gains electrons to attain the electronic configuration of noble gas in order to become stable.Selenium has an atomic number of 34 and its electronic configuration is:[tex][Se]=[Ar] 3d^{10}4s^24p^4[/tex]
In order to obtain the electronic configuration of noble gas, it will gain two electrons and form [tex]Se^{2-}[/tex]anion.
[tex][Se]^{2-}=[Ar] 3d^{10}4s^24p^6[/tex]
(36 number of total electrons)
Sulfur has an atomic number of 16 and its electronic configuration is:[tex][S]=[Ne]3s^2 3p^4[/tex]
In order to obtain the electronic configuration of noble gas, it will gain two electrons and form [tex]S^{2-}[/tex] anion.
[tex][S]^{2-}=[Ne]3s^2 3p^6[/tex]
(18 number of total electrons)
Sodium has an atomic number of 11 and its electronic configuration is:[tex][Na]=[Ne]3s^1[/tex]
In order to obtain the electronic configuration of noble gas, it will lose one electron and form [tex]Na^{+}[/tex] cation.
[tex][Na]^+=[Ne]3s^0[/tex]
(10 number of total electrons)
Chlorine has an atomic number of 17 and its electronic configuration is:[tex][Cl]=[Ne]3s^2 3p^5[/tex]
In order to obtain the electronic configuration of noble gas, it will gain one electron and form [tex]Cl^{-}[/tex] anion.
[tex][Cl]^{-}=[Ne]3s^2 3p^6[/tex]
(18 number of total electrons)
So, from this, we can conclude that the atom with (+1) charge out given four atoms in sodium atom, Na:10 electrons.
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1.
Which chemical equation represents a double replacement reaction?
Answer:
AX+BY=AY+BX
Explanation:
Double-replacement reactions are represented by the general equation AX+BY=AY+BX a reaction in which a substance combines with oxygen, releasing a large amount of energy in the form of light and head
if a neutral atom has an atomic number of 23, how many electrons does it have?
What is the best definition for the freezing point of a substance? *
It is the temperature at which a substance become cold.
It is the temperature at which a substance changes from a gas to a liquid
It is the temperature at which a substance changes from a liquid to a solid.
Answer:
It is the temperature at which a substance changes from a liquid to a solid.
Have a good day!
The temperature at which a substance changes from a liquid to a solid is called its freezing point. Hence, option d is the correct definition of freezing point.
What is freezing point?Freezing point is a physical property of a substance which measures the temperature at which its liquid state converts to solid state where, the two phases are in equilibrium.
For example, water freezes at 0 degree Celsius to form ice. Hence, 0°C is the freezing point of water. The freezing point of substance is affected by the bond type, molecular weight, temperature and pressure as well the impurities if any.
The more the intermolecular forces between the molecules, more easy to convert it into solid. Hence, the freezing point will be lower. If there is any impurities present, the freezing point depression will occurs.
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A hypothesis .........
Answer:
all of the above
Explanation:
a hypothesis is indeed the second step. it also can be tested since you made it beforehand. it also is supposed to be educated. so all of the above.
Answer:
All of the above
Explanation:
plz help it is urgent
will give brainliest
it is only multiple choice q
Answer:
Q1. B
Q2. D
Q3. C
Hope it helps............
Plz mark as brainliest
Calculate the volume (in cm³) of 38.5 grams of platinum if the density of platinum is 21.5 g/cm³. Give your answer to 2 decimal places
Answer:
[tex]\boxed {\boxed {\sf v\approx 1.79 \ cm^3}}[/tex]
Explanation:
The formula of density is:
[tex]d=\frac{m}{v}[/tex]
If the formula is rearranged for volume, it becomes:
[tex]v=\frac{m}{d}[/tex]
The mass of the platinum is 38.5 grams.
The density is 21.5 grams per cubic centimeter.
[tex]m=38.5 \ g \\d= 21.5 \ g/cm^3[/tex]
Substitute the values into the formula.
[tex]v=\frac{38.5 \ g}{ 21.5 \ g/cm^3}[/tex]
Divide. Note that the grams (g) will cancel each other out.
[tex]v=1.79069767 \ cm^3[/tex]
Round to 2 decimal places (hundredth place). The 0 in the thousandth place tells us to leave the 9 in the hundredth place.
[tex]v\approx 1.79 \ cm^3[/tex]
The volume is about 1.79 cubic centimeters.
Answer:
D = 1.79 cm^3
Explanation:
Use the formula Volume = Mass / Density with what you've been given.
V = 38.5 g / 21.5 g/cm^3
V = 1.790697674 = 1.79 cm^3
Can You Tell?
Pepsinogen is released in the stomach. Why can't it digest stomach walls?
Answer:
Specific cells within the gastric lining, known as chief cells, release pepsin in an inactive form, or zymogen form, called pepsinogen. By doing so, the stomach prevents the auto-digestion of protective proteins in the lining of the digestive tract.
Explanation:
Make sure to edit so you don't get copy-writed
what would happen to a gummy bear after soaking for 2 days in distilled water
Answer:
it would expand
Explanation:
the gummy bear would absorb alot of water
Answer:If a gummy bear is soaked in distilled (pure) water for 24 hours, then the gummy bear will increase in size
Explanation:
Please do the worksheet
Which of the following is a statement of Hess's law?
O A. The enthalpy of reaction is exothermic if all the intermediate steps
are exothermic.
B. The enthalpy of reaction is determined from temperature changes
in the reaction.
C. The enthalpy of reaction does not depend on the steps taken in
the reaction.
O D. The enthalpy of reaction is known only for reactions that are
directly measurable.
Answer:
C
Explanation:
the enthalpy of reaction is independent of the reaction path
The statement with related to the Hess's law should be the enthalpy of reaction that does not based on the reactions.
What is Hess's law?It is also called as the Hess's law of constant that should be heat summation. In the year 1840 here the heat should be absorbed or it should be evolved or there should be changed in the enthalpy with respect to the chemical reaction that contain the fixed quantity.
Therefore, we can conclude that the option c is correct.
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In the quantum mechanical model, what two words do they use to describe
particles?
Answer:
This question is incomplete
Explanation:
This question is incomplete but one can assume the answer from the definition of quantum mechanics. Quantum mechanics is the science that describes particles in nature at the atomic and subatomic particle (electron, proton and neutron) level. Thus it can be assumed that atoms and subatomic particles are used to broadly describe particles.
The autonomic nervous system consists of what parts?
A. Sympathetic
B. Autonomic
C. Parasympathetic
D. Somatic
HELP PLEASE
Answer:
A. Sympathetic
and
C. Parasympathetic
Explanation:
Ap3x
refers to the distance from one wave peak to the next wave peak. (Lesson
4.02)
A. frequency
B. wavelength
C. amplitude
D. medium
Answer:
wavelenght
Explanation:
Wavelength can be defined as the distance between two successive crests or troughs of a wave. ... Wavelength is inversely proportional to frequency. This means the longer the wavelength, lower the frequency. In the same manner, shorter the wavelength, higher will be the frequency.
Answer:
The answer is B) Wavelength
Explanation:
Hope this helps:)
57.1% carbon, 6.16% hydrogen, 9.52% nitrogen, and 27.18% oxygen
Quantitative was to measure light intensity
According to the Octet Rule, an element is most stable with ______________ valence electrons
Group of answer choices
eight
ten
five
three
Predict: What is likely to happen to electrons in the atom pictured above?
-the atom will gain 3 electrons
-the atom will lose 5 electrons
-the atom is unreactive and electrons will not move
-the atom will gain 8 electrons
The atom will gain 3 electrons
Further explanationValence electrons are electrons that are used to bond which are located in the outer shell of the atom
The electron configuration of N :
[He] 2s² 2p³
This configuration shows that there are 5 valence electrons in the outer shell of the N atom
So based on the octet rule, the N atom will bind 3 more electrons to make it stable
An example is the formation of covalent (triple) bonds in the formation of N2 molecules
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asap first to get correct get brainleist
Answer: c)winter
HAVE A BLESSED DAY!!!!!
Consider the following reaction: 4HCl(g)+O2(g)→2H2O(g)+2Cl2(g) Each of the following molecular diagrams represents an initial mixture of the reactants.(Figure 1)
How many molecules of Cl2 would be formed from the reaction mixture that produces the greatest amount of products?
Answer:
A
Explanation:
The number of molecules of Cl₂ that would be formed from the reaction mixture that produces the greatest amount of products is 4.
What are molecular diagrams?Molecular diagrams are the representations of the chemical reaction, with the help of molecular orbital theory. They show the chemical bonding and linear combination of the elements.
Now, here the reaction is
4HCl(g)+O₂(g)→2H₂O(g)+2Cl₂(g)
Diagram b has 8 molecules of HCl (limit reagent) and 3 molecules of O₂. This is the reaction that will produce the greatest amount of product.
Hence, b is taken for the number of chlorine.8 molecules of HCl need to combine with 2 molecules of oxygen to produce 4 molecules of Cl₂. The reaction's stoichiometry shows this to be the case.
Thus, there will be four, 4 molecules of chlorine that would be formed from the reaction.
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A gas occupies 11.2 liters at 0.860 atm. What is the pressure if the volume becomes 15.0 L? (Boyle)
Answer:
0.642 atmExplanation:
The new pressure can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
Since we are finding the new pressure
[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]
From the question we have
[tex]P_2 = \frac{11.2 \times 0.86}{15} = \frac{9.632}{15} \\ = 0.64213333...[/tex]
We have the final answer as
0.642 atmHope this helps you
Given:
Initial Volume [tex] \sf (V_1) [/tex] = 11.2 L
Initial Pressure [tex] \sf (P_1) [/tex] = 0.860 atm
Final Volume [tex] \sf (V_2) [/tex] = 15.0 L
To Find:
Final Pressure [tex] \sf (P_2) [/tex]
Concept/Theory:
[tex] \bf{ \underline{Boyle's \: Law} \: (Pressure - Volume \: Relationship)}[/tex]
"At constant temperature, the pressure of a fixed amount of gas varies inversely with the volume of the gas."
[tex] \bf{P \propto \dfrac{1}{V} \: (at \: constant \: T \: and \: n)}[/tex]
It can be also stated as "At constant temperature, the product of pressure and volume of fixed amount of a gas remains constant."
[tex] \bf{PV = Constant}[/tex]
If the initial pressure and volume of a fixed amount of gas at constant temperature are [tex] \sf (P_1) [/tex] & [tex] \sf (V_1) [/tex] and final pressure of the gas is [tex] \sf (P_2) [/tex] and volume occupied is [tex] \sf (V_2) [/tex], then according to Boyle's law;
[tex] \bf{P_1V_1 = P_2V_2 = Constant}[/tex]
OR
[tex] \bf{\dfrac{P_1}{P_2} = \dfrac{V_2}{V_1}}[/tex]
Answer:
By using Boyle's Law, we get:
[tex] \rm \longrightarrow \dfrac{0.860}{P_2} = \dfrac{15.0}{11.2} \\ \\ \rm \longrightarrow P_2 = \dfrac{11.2}{15.0} \times 0.860 \\ \\ \rm \longrightarrow P_2 = \dfrac{9.632}{15.0} \\ \\ \rm \longrightarrow P_2 = 0.642 \: atm[/tex]
[tex] \therefore [/tex] Final Pressure [tex] \sf (P_2) [/tex] = 0.642 atm
identify the law that explains the following observation nitrogen dioxide can be formed by reacting 14 G of nitrogen with 32 grams of oxygen
Answer:
The law of definite proportions. I had the same question for chemistry and this is what they said was right so I got 100%.
Explanation:
Chemsitry help pleasee
Answer:
The halogens
Explanation:
In the s and p-blocks, the halogens have the highest value of electronegativity.
This is because they only need one electron to complete their configuration.
Electronegativity is the tendency of an atom to draw electrons to itself in a covalent bond. Halogens requires just one electron to complete their octet. In a bond, they have more electronegativity than other elements. The most electronegative atom is located in the halogen group.Calculate the mass of 1.35 moles of sodium chloride
Answer:
78.894g of NaCl
Explanation:
This requires some dimensional analysis:
Using the molar mass of NaCl we get the answer we are looking for.
1.35 Moles of NaOH * [tex]\frac{58.44g NaCl}{ 1 mole NaCl}[/tex] = 78.894 g of NaCl
which type of bond joins nonmetals atoms to nonmetal atoms
Answer:
Ionic bonds form when a nonmetal and a metal exchange electrons, while covalent bonds form when electrons are shared between two nonmetals. An ionic bond is a type of chemical bond formed through an electrostatic attraction between two oppositely charged ions.
Explanation:
That's what google said.
