Answer:
The number of protons in an atom is different than the atom’s total mass.
Explanation:
Mendeleev knew only that, with some anomalies, the properties of elements varied periodically with their atomic masses.
Moseley's X-ray experiments enabled him to remove these anomalies and to show that the properties of elements varied with their atomic numbers.
Chadwick later discovered that the mass differences were caused by the presence of neutrons.
plz answer fast Which is not a crystalline allotrope of carbon? Select one: a. soot b. diamond c. graphite
Answer:
graphite
Explanation:
Graphite is opaque, a very good lubricant, a good conductor of electricity, and a thermal insulator. Allotropes of carbon are not limited to diamond and graphite, but also include buckyballs (fullerenes), amorphous carbon, glassy carbon, carbon nanofoam, nanotubes, and others.
HOPE IT HELPS :)
PLEASE MARK IT THE BRAINLIEST!
es with hydrogen
atoms
Fill the valencies with
C
+
() C c-c=c
(ii)
(
c
C - C = C
/
c
(ii)
c
- C
با
-
1
c - c
С — С
co
Answer:
all u have to do is inserting hydrogen atoms where it's possible, if carbon is not bonded to any element, then it can have 4 hydrogens. for the first chain, the first carbon can have 3 hydrogen atoms, the second carbon 1 hydrogen atom only the third also 1 hydrogen since there is double bond and the 4th 2 hydrogen atoms
Answer:
a rat and a cat can have sex
xD
Explanation:
Chemistry deals with all the following except: Select one: a. The composition of matter. b. The properties of matter. c. Our eating habits. d. The conversion of matter between various states.
Answer:
C. Our eating habits
Hope that helps.
What is the difference between a strong base and a weak base?
A. A strong base is always more concentrated than a weak base,
B. A strong base has a lower Ki than a weak base.
C. A strong base produces more ions in solution than a weak base,
D. A strong base is not as conductive as a weak base.
Answer:
C
Explanation:
A cylinder containing 14.71 L of helium gas at a pressure of 169.1 atm is to be used to fill toy balloons to a pressure of 1.086 atm. Each inflated balloon has a volume of 2.414 L. What is the maximum number of balloons that can be inflated? Report your answer to 1 decimal place. (Remember that 14.71 L of helium at 1.086 atm will remain in the exhausted (empty) cylinder)
Answer:
The number of balloons is 948.8.
Explanation:
The number of balloons can be calculated as follows:
[tex] N = \frac{V_{f}}{V_{T}} [/tex]
Where:
[tex]V_{f}[/tex]: is the volume at 1.086 atm
[tex]V_{T}[/tex]: is the balloon volume = 2.414 L
The volume at 1.086 atm can be found using Boyle's law:
[tex] P_{i}V_{i} = P_{f}V_{f} [/tex]
[tex] V_{f} = \frac{P_{i}V_{i}}{P_{f}} = \frac{169.1 atm*14.71 L}{1.086 atm} = 2290.5 L [/tex]
Now, the number of balloons is:
[tex] N = \frac{V_{f}}{V_{T}} = \frac{2290.5 L}{2.414 L} = 948.8 [/tex]
Therefore, the number of balloons is 948.8.
I hope it helps you!
Ranjana has two unknown solutions X and Y
What is the term for the belief that one's own culture is superior to other
cultures?
O A. Cultural behavior
O B. Cultural competence
C. Cultural relativism
D. Cultural absolutism
Cultural absolutism is the term for the belief that one's own culture is superior to other cultures.
What is cultural absolutism?Cultural absolutism is one of the perspectives which is common in anthropology, but it can also be applied to non-scientific thoughts also. It assumes that there is a set of universal values which are objectively valid in every situation.
Today, pure cultural absolutism is seen as a harmful effect of ethnocentrism focusing on the belief that one's own culture is superior and the practice of holding other's cultures to the standard of our own. However, purely relativist anthropologists have also been critiqued for going too far, by denying any common humanity and being too lenient towards morally questionable practices. Contemporary approaches try to find a balance between the universal values, such as human dignity, and a more inclusive and relativistic side of culture.
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Is there any Chemical including in BIOGESIC?
Can you tell me if it was included?
Answer:
This combination product contains 2 medications, acetaminophen and an antihistamine. Acetaminophen helps to reduce fever and/or mild to moderate pain (such as headache, backache, aches/pains due to muscle strain, cold, or flu).
Explanation:
it will help you. may be
Answer:
looooser
mark me brailist
calculate the amount in moles of a gas which occupies 250cm3 at s.t.p
Answer: 0.01 moles (I am guessing)
Explanation:
Firstly, cm3 and ml are equal to one another, therefore 250cm3 can also be written as 250 ml. I Googled and found that ideally, one mole of gas will occupy a volume of 22.4 L (22,400 ml) at s.t.p. 250 ml out of 22,400 ml is 0.01 rounded, therefore I assume that is the answer. About 0.01 mole occupies 250 cm3 at s.t.p.
what is the question tag for Lynne speaks french and German
Answer:here is it...
Explanation:
The question tag for the statement "Lynne speaks French and German" would be "doesn't she?"
The question tag is a short question added to the end of a statement to turn it into a question and seek confirmation or agreement. It is usually formed by using an auxiliary verb opposite in polarity to the main verb in the statement.
In the given statement, "Lynne speaks French and German," the main verb is "speaks." Since the main verb is in the affirmative form, the question tag should use the negative form.
Therefore, we use the auxiliary verb "doesn't" (the negative form of "does") and add the pronoun "she" to match the subject of the statement.
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What is the specific latent heat of fusion of ice if it takes 863 kJ to convert 4.6 kg of ice into water at 0 C?
Answer:
The correct answer is 187.7 J/Jg.
Explanation:
The formula for finding the specific heat of fusion is,
Specific heat of fusion = Q/m
Here Q is the heat energy added, signified in kJ, and m is the mass of the object in kg.
Based on the given information, the heat energy added or Q is 869 kJ and the mass of the ice is 4.6 Kg
Now putting the values in the formula we get,
Specific heat of fusion = Q/m
Specific heat of fusion = 863 kJ / 4.6 Kg = 187.7 J/Kg
Which one of these is most likely to gain electrons and which one is most likely to lose electrons? (And please explain why)
1. Ra (Radium)
2. In (Indium)
3. P (Phosphorus)
4. Te (Tellurium)
5. Br (Bromine)
6. Rb (Rubidium)
Answer:
(I). The most likely to lose electron is Rubidium
(II). The most likely to lose electron is Bromine
Explanation:
Given that,
Radium, Indium, Phosphorus, Tellurium, Bromine and Rubidium
We know that,
Metal :
They atom which to lose electron these is called metal.
When the atom loses the electron then the positive charge come on the atom.
The most likely to lose electron is Rubidium
Non metal :
They atome which is gains electron. It is called non metal.
So, we can say that, the non metal gains electron.
When the atom gains the electron then the negative charge come on the atom.
The most likely to gain electron is Bromine
Hence, This is required answer.
Consider the hypothetical chemical reaction represented by the equation 3 A + 2 B → A 3B 2 Which of the following is a correct interpretation of this equation? i. 3 grams of A react with 2 grams of B to form 1 gram of A 3B 2 ii. 3 atoms of A react with 2 atoms of B to form 1 molecule of A 3B 2 iii. 3 moles of A react with 2 moles of B to form 1 mole of A 3B 2
Answer:
iii. 3 moles of A react with 2 moles of B to form 1 mole of A 3B 2
Explanation:
A + 2 B → A 3B 2
A chemical equation among other things, gives the stoichiometry of the reaction; that is the relationship between reactants and products.
This relationship is basically stated in moles form the coefficients of the reactants and product.
From the reaction above, we can say;
1 mol of A reacts with 2 mol of B to form 1 mol of A3B2
It cannot be grams because the reactants and products all have different molar masses.
The correct interpretation of the equation of the hypothetical chemical reaction is; Choice (iii) 3 moles of A react with 2 moles of B to form 1 mole of A 3B 2.
Definition:
Chemical equations are equations that make use of chemical formulae and symbols to represent chemical reactions. The left-hand side of a chemical equation represents the reactants and the right-hand side represents the products.
Each reacting entity is also assigned its corresponding stoichiometric coefficient.
However, this stoichiometric coefficient is to quantify the no. of moles of the reactants consumed or products formed as the case may be.
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step by step of how to convert fahrenheit and celsius to kelvins -5F to kelvins please and thank you
The boiling point of water is 100ºC. The boiling point of acetone is 56ºC. Which statement about distilling a mixture of acetone and water is correct?
Acetone remains in the original container.
Water will vaporize from the mixture before acetone.
Acetone is captured and cooled.
Water is collected as it leaves the mixture.
Answer:
Acetone is captured and cooled.
Explanation:
The boiling point of acetone is lower than that of water, so it will vaporise before water. Then acetone will be captured and cooled to separate it from its mixture with water.
The statement which is correct about distilling a mixture of acetone and water is as follows:
Acetone is captured and cooled.Thus, the correct option is C.
What is Distillation?Distillation may be defined as a procedure that generally involves the conversion of a liquid into a vapor that is eventually condensed back to liquid form. With the help of this process, the separation of components or substances from a liquid mixture by using selective boiling and condensation occurs.
Acetone has the lowest boiling point as compared to water. So, it boils faster than that water and vaporizes before water. After the termination of this process, the acetone will be predominantly captured and cooled to separate it from its mixture with water.
Therefore, the correct option for this question is C.
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A sample of kerosene has a mass of 36.4g. It’s volume is 45.6mL. What is the density of kerosene?
Answer:
Density = 0.8 g/cm³Explanation:
The density of an object can be found using the formula
[tex]Density(\rho) = \frac{mass}{volume} [/tex]From the question
mass of kerosene = 36.4 g
volume of kerosene = 45.6 mL
To find the density substitute the values into the above formula and solve
We have
[tex]Density = \frac{36.4}{45.6} [/tex]= 0.7982
We have the final answer as
Density = 0.8 g/cm³Hope this helps you
please Help!! And answer ASAP!!! Give two examples of compounds that form extended structures instead of molecules. Using a complete
sentence.
Answer:
A structure whose sub-units occur in a constant ratio and are arranged in a repeating pattern; the sub-unit can be individual atoms or a molecule.
Heterometallic systems Which employ multiple building units to produce extended structures.
And
Design and assessment of extended structures often require the generation of spatially variable earthquake motions to be used as multiple-support inputs.
Explanation:
Such As A Polymer For Instance.
A type of extended structure that is made of many smaller, repeating sub-units in a chain; Although, The repeating sub-unit is a unique molecule. I Hope That This Answer Helps.
water and development are substitute of one another.
explanation with it, please
Which statement is true?
A.
Molar concentration is proportional to the temperature of a reaction.
B
Molar concentration is proportional to the change in the number of moles in a reaction.
c.
Molar concentration is proportional to the partial pressure of a gaseous system.
D
Molar concentration is proportional to the volume of a system.
Answer:
I'm not really sure. but I think is D
Answer: B, Molar concentration is proportional to the change in the number of moles in a reaction
Explanation: took the test on plato
What is the boiling point (in °C) of a 0.743 m aqueous solution of KCI?
Enter your rounded answer with
3 decimal places.
Over the period of a few days, a hospital receives an overwhelming increase in the number of patients with food poisoning. How would a scientist respond to this increase in sick patients?
Answer:
Hey there!
A scientist would try to determine the cause of the food poisoning, and see if the people who got poisoned had anything in common, for example: they ate at the same restaurant, they are all people of a certain age, etc.
Let me know if this helps :)
why is an element considered a pure substance
Answer:
Because they cannot be separated into more then one type of substance.
Explanation:
Answer:
Elements are made of only one kind of atom. The particles can be a single atom or a molecule made of only one kind of atom. There is no physical change that can separate elements into more than one kind of substance. This makes an element a pure substance.An element is made up of only one type of atom. An element cannot be broken down into a simpler form.
Energy in the amount of 420 J is added to a 35 g sample of water at a temperature of 10°C. What is the final temperature of the water?
The final temperature of the water, T2 = 38.57°C
Temperature can be defined as a measure of the degree of hotness or coldness of a physical object (body). Thus, it is measured with a thermometer and its units are degree Celsius (°C), Fahrenheit (°F) and Kelvin (°K).
A calorie refers to the amount of heat required to raise the temperature of a gram of water by one (1) degree Celsius (1°C).
Given the following data:
Quantity of energy = 420JMass = 35 gramsInitial temperature, T1 = 10°CThe specific heat capacity of water is 4.2 J/g°C.
To find the final temperature of the water (T2):
Mathematically, the quantity of energy (heat capacity) is given by the formula;
[tex]Q = mcdt[/tex]
Where;
Q represents the heat capacity or quantity of heat.M represents the mass of an object.C represents the specific heat capacity of water.dt represents the change in temperature.Substituting the values into the formula, we have;
[tex]420 = 3.5 \; * \; 4.2 \; * \; dt[/tex]
[tex]420 = 14.7 \; * \; dt\\\\dt = \frac{420}{14.7}[/tex]
Change in temperature, dt = 28.57°C
Next, we would solve for the final temperature by using this formula;
[tex]dt = T2 - T1[/tex]
[tex]28.57 = T_{2} - 10\\\\T_{2} = 28.57 \; + \; 10\\\\T_{2} = 38.57[/tex]
Final temperature, T2 = 38.57°C
Therefore, the final temperature of the water, T2 is equal to 38.57°C
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When an object falls toward the ground due to gravity, what type of energy becomes kinetic energy?
Answer:
potential energy (gravitational)
Explanation:
Potential energy is the energy that is stored in an object due to its position relative to some zero position. An object possesses gravitational potential energy if it is positioned at a height above (or below) the zero height. If we think of the ground as the zero height, the height of the object is coming down from a positive height. Wherever it is relative to the zero height, it is stored at that height, meaning that it is potential energy at that particular height. When it moves to the ground, it becomes kinetic, by gravitational means.
Answer:
Potential
Explanation:
ammonium hydroxide molecular weight?step by step????
Lets find
[tex]\\ \sf\longmapsto NH_4OH[/tex]
[tex]\\ \sf\longmapsto 14u+4(1u)+16u+1u[/tex]
[tex]\\ \sf\longmapsto 14u+4u+17u[/tex]
[tex]\\ \sf\longmapsto 18u+17u[/tex]
[tex]\\ \sf\longmapsto 35u[/tex]
How many protons does an atom of zinc contain?
It contains an amount
a single neutral atom of zinc has 30 protons
Charles is given two electrical conductors – aluminium and graphite. Help him to select one for making an electric wire. Justify your reason.
Answer:
I think the answer is aluminium because both graphite and Al are good conductors of electricity but Al is more ductile than graphite. also pls mark as Brainilest.
Explanation:
Compound A, C6H12O2, was found to be optically active, and it was slowly oxidized to an optically active carboxylic acid B, C6H12O3, by Ag(NH3)2. Oxidation of A by anhydrous CrO3 gave an optically inactive compound D that reacted with Zn amalgam/HCl to give 3-methylpentane. With aqueous H2CrO4, compound A was oxidized to an optically inactive dicarboxylic acid C, C6H10O4. Give structures for compounds A, B, and C; do not specify stereochemistry.
Answer:
kindly check the attach file for the drawing of the chemical structures.
Explanation:
So, we are going to start from the compound D, which is stated in the question to be optically active. Therefore, we will have that:
STEP ONE: THE OXIDATION OF COMPOUND A, C6H12O2 TO GIVE COMPOUND C.
The oxidation of compound A,C6H12O2 gives another chemical compound that is chemical compound C which is a optical inactive di-carboxylic acid. The chemical equation is given below:
C6H12O2 + H2Cr2O4 --------------------------------------------> HOOCCH2CHCH3CH2COOH.
STEP TWO: THE OXIDATION OF COMPOUND A, C6H12O2 TO GIVE COMPOUND B.
The oxidation of compound A,C6H12O2 gives another chemical compound that is chemical compound C which is a optically active acid. The chemical equation is given below:
C6H12O2 + Ag(NH3)2^+ -----------------------------> C6H12O3.
Since the question asked us to give the structures of Compound A,B and C there is no need to to show the chemical reaction for compound D.
Kindly check the picture below for the chemical structures.
Describe what happens to the particles when a substance:
1. Melts
2. Freezes
3. Boils
4. Condenses
What would you use to measure the height of a sample?
Question 2 options:
ruler
beaker
graduated cylinder
electronic balance
Answer:
please clear ur ques with image
it's unable to be understood
...