Answer:
Yes
Explanation:
You add 7.8 g of iron to 23.20 mL of water and observe that the volume of iron and water together is 24.19 mL . Calculate the density of iron.
Answer:
7.88g/mL is density of iron
Explanation:
As water and iron are insoluble, the volume of displaced fluid (Water) is equal to the volume of the solid (Iron). That means volume of the iron is:
24.19mL - 23.20mL = 0.99mL is the volume of iron
As density is the ratio between mass -7.8g- and volume of a compound -0.99mL- the density of iron is:
7.8g / 0.99mL =
7.88g/mL is density of iron5) How many grams of C6H6 are present in 12.70 moles of C6H6?
Answer:
991.997
Explanation:
no of moles=given mass/molar mass ----1mass of benzene=78.11moles=12.7applying equation 112.7=mass/78.11mass of [tex]C_{6}H_{6}[/tex]=991.997hope this helps youConvert 34.4 lb to g. (1 lb = 453.6 g) A) 7.58 X 10-2 g B) 1.56 X 103 g C) 7.58 X 104 g D) 1.56 X 102 g E) 1.56 X 104 g
Answer:
E) 1.56x10⁴g
Explanation:
Pounds and grams are both units of mass. Pounds are used in UK and USA. Grams is the unit of mass used in the international system of units, SI.
To convert pounds, lb, to grams, g, we need the equivalence between these 2 units of mass:
1lb = 453.6g
That means 1lb weighs 453.6g. 34.4lb weigh:
34.4lb * (453.6g / 1lb) = 1.56x10⁴g. That means right option is:
E) 1.56x10⁴gWhat measures the number of protons and neutrons in an atom?
-Atomic Number
-Atomic Mass
-Isotopes
-Olons
Answer: atomic mass
Explanation:
Mass Number. The mass number (A) of an atom is the total number of protons and neutrons in its nucleus. The mass of the atom is a unit called the atomic mass unit (amu).
Two different isotopes of an element have different?
What are the coefficients that would correctly balance this reaction?
____Ni + ____C4H8N2O2 → ____Ni(C4H8N2O2)2
a.1,2,1
b.2,2,1
c.2,1,1
d.2,2,2
The coefficient of Ni+ in this reaction is 1 and that of C₄H₈N₂O₂ is 2 and the coefficient of the product Ni(C₄H₈N₂O₂ )₂ is 2. Hence option A 1,2,1 is correct.
What is a balanced reaction?A balanced reaction is represented by a chemical equation where all reactants and products are correct stoichiometry and their states are represented in brackets.
In a balanced chemical equation, each element have to equal in number on both side. For example, if there four oxygen in the reactant side then the product side must have four oxygens.
If the number is not equal we can balance them by multiplying with simple integers. These numbers are called coeffcients.
In the given reaction there are one nickel in both side but two C₄H₈N₂O₂ are there in the product side. Therefore we must multiply 2 for C₄H₈N₂O₂ in the reactant side.
Hence, we get the coefficient for C₄H₈N₂O₂ in reactant side 2 and in the product side for the nickel complex 1.Thus, option a 1,2,1 is correct.
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A theory is accepted by scientists when
A. It becomes a law
B. It can be shown with a model
C. It describes how nature works
D. It is supported by adequate data
Answer:
D. It is supported by adequate data
Explanation:
A theory is a well-substantiated explanation
Hope this helps!
Have a great day. :)
If a 50 kg student is pushed in a rolling chair with a force of 20 N, what is the student’s acceleration?
2.5 m/s2
4 m/s2
1,000 m/s2
0.4 m/s2
Answer:
0.4m/s²
Explanation:
Given parameters:
Mass of student = 50kg
Force = 20N
Unknown:
Acceleration = ?
Solution:
From Newton's second law of motion,
Force = mass x acceleration
Acceleration = [tex]\frac{Force }{mass}[/tex] = [tex]\frac{20}{50}[/tex] = 0.4m/s²
Will the average vibrational energy of nitrogen gas (N2) at 22 c be greater than, less than, or equal to the average vibrational energy of NaCl at 22 c?
The average vibrational energy of nitrogen gas (N₂) at 22 c be greater than the average vibrational energy of NaCl at 22 c.
The average distance between molecules of gaseous substance is greater than the average distance between molecules of liquid and solid substance.
The molecules of the gaseous substances always move with greater speed due to large distance between the molecules.
The molecules of a solid substance are closely packed together and this reduces the average speed of the molecules.
Nitrogen gas (N₂) is a gaseous substance while sodium chloride (NaCl) is a solid substance.
Thus, we can conclude that the average vibrational energy of nitrogen gas (N₂) at 22 c be greater than the average vibrational energy of NaCl at 22 c.
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Guys please I need an answer for this asap
Mg+2HCl -> MgCl2+H2
0.2 mole of mg reacted with 0.2 of HCl
What is the mass of hydrogen gas produced?
Answer:
Mass of hydrogen gas produced = 0.2 g
Explanation:
Given data:
Number of moles of Mg = 0.2 mol
Number of moles of HCl = 0.2 mol
Mass of hydrogen gas produced = ?
Solution:
Chemical equation:
Mg + 2HCl → MgCl₂ + H₂
Now we will compare the moles of of hydrogen with Mg and HCl.
Mg : H₂
1 : 1
0.2 : 0.2
HCl : H₂
2 : 1
0.2 : 1/2×0.2 = 0.1
HCl produced less number of moles of hydrogen gas it will act as limiting reactant.
Mass of hydrogen:
Mass = number of moles × molar mass
Mass = 0.1 mol × 2 g/mol
Mass = 0.2 g
If you have 100g of KMnO how many moles do you have?
0.9 mol KMnO
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableStoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
100 g KMnO
Step 2: Identify Conversions
Molar Mass of K - 39.10 g/mol
Molar Mass of Mn - 54.94 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of KMnO - 39.10 + 54.94 + 16.00 = 110.04 g/mol
Step 3: Convert
Set up: [tex]\displaystyle 100 \ g \ KMnO(\frac{1 \ mol \ KMnO}{110.4 \ g \ KMnO})[/tex]Divide: [tex]\displaystyle 0.90876 \ mol \ KMnO[/tex]Step 4: Check
Follow sig fig rules and round. We are given 1 sig fig.
0.90876 mol KMnO ≈ 0.9 mol KMnO
when the foil is negatively charged will all of the foil still be made up of aluminum atoms
Answer:
Yes.
Explanation:
Electric charge cannot change the elemental composition of a substance.
The application of charge to the aluminium foil does not change the composition of the foil and hence the foil will still be made up of aluminium atoms.
What is an atom?An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
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against at -20 degree centigrade occupied the volume of one 40 ml calculate the temperature at which the volume of cash pickup 65ml pressure remain constant
The final temperature :T₂=411.125 K = 138.125 °C
Further explanationGiven
T₁=-20 °C+273 = 253 K
V₁=40 ml
V₂=65 ml
Required
Final temperature
Solution
Charles's Law
When the gas pressure is kept constant, the gas volume is proportional to the temperature
[tex]\tt \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]
Input the value :
T₂=(V₂.T₁)/V₁
T₂=(65.253)/40
T₂=411.125 K = 138.125 °C
What elements are pliable??
Answer:
Yttrium, Silver,Iron,Nickel and Copper I believe
Calculate the average atomic mass of an element that has an isotope with a mass of 11.00 amu (60% abundance) and another isotope with a mass of 10.53 (40% abundance). What is this element? Make sure to prove this with your math calculations.
Answer:
Helium
He
atomic number 2.
It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas,
Explanation:
These different types of helium atoms have different masses (3 or 4 atomic mass units ), and they are called isotopes. For any given isotope, the sum of the numbers of protons and neutrons in the nucleus is called the mass number. This is because each proton and each neutron weigh one atomic mass unit (amu). By adding together the number of protons and neutrons and multiplying by 1 amu, you can calculate the mass of the atom. All elements exist as a collection of isotopes. The word ‘isotope’ comes from the Greek ‘isos’ (meaning ‘same’) and ‘topes’ (meaning ‘place’) because the elements can occupy the same place on the periodic table while being different in subatomic construction.
I guess you didn’t mean what u wrote in that song about meee
You said forever now I drive past your street
Answer:
and your probably with that blond girl who always me
doubt she so much older than me she's every thing i'm in insecure about
Explanation:
Answer: and all my friends are tired of hearing how much i miss you but i kinda feel sorry for them cause they'll never know you the way i do , yea today i drove through the suburbs and pictured i was driving home to you.
Explanation:
define
properties of gases
have a great day
Answer:
Gases have three characteristic properties: (1) they are easy to compress, (2) they expand to fill their containers, and (3) they occupy far more space than the liquids or solids from which they form.
Explanation:
2
What is the weight of an object of mass 8.5 kg?
Answer:83.3 (kg*m)/s^2
Explanation:weight is the combination of the mass of an object and the gravitational force on it.
Weight=mass (kg) * gravity
Gravity=9.8 m/s^2
Weight= (8.5 kg)*(9.8 m/s^2)
There are 83.3N of weight in an object of mass 8.5 kg.
HOW TO CALCULATE WEIGHT:
The weight of an object is the mass of the object in relation to gravity. Weight is measured in Newton (unit of force). The weight can be calculated by multiplying the mass of the object by acceleration due to gravity on Earth i.e. Weight (N) = mass (kg) × gravity (m/s²)According to this question, an object with a mass of 8.5kg is given. The weight is calculated as follows:Weight = 8.5kg × 9.8m/s²Weight = 83.3NTherefore, there are 83.3N of weight in an object of mass 8.5 kg.Learn more at: https://brainly.com/question/8164654?referrer=searchResults
hydrogen monofluoride
Answer:
what's the question man
Explanation:
Why pure hydrogen is not used in ballons ?
Answer: Hydrogen that is not used in balloons because hydrogen burns very easily.
pls mark brainliest
In which of these substances did the individual atoms combine together in a chemical reaction?. Single choice.
Answer:
hello the options related to your question is missing hence I will give you a general answer as regards to combination of atoms in a chemical reactions
answer :
In a chemical reaction the bonds that are found between the atoms of reactants are broken up and a different/new bonds are formed between the atoms of the various reactants involved in the chemical reaction to produce a new product. during this process no new atoms are created but new bonds are created to form a product
Example of such substance where atoms can combine together in a chemical reaction is : Iron sulfide [ Fe(s) + S(s) → FeS(s) ]
Explanation:
In a chemical reaction the bonds that are found between the atoms of reactants are broken up and a different/new bonds are formed between the atoms of the various reactants involved in the chemical reaction to produce a new product. during this process no new atoms are created but new bonds are created
Example of such substance where atoms can combine together in a chemical reaction is : Iron sulfide [ Fe(s) + S(s) → FeS(s) ] i.e. combination of Iron atoms and sulfur atoms
what do you meaning seachants? write with example.
Answer:
answer
Explanation:
simile is a figure of speech that compares two different things in an interesting way. The object of a simile is to spark an interesting connection in a reader's or listener's mind. A simile is one of the most common forms of figurative language. Examples of similes can be found just about anywhere from poems to song lyrics and even in everyday conversations.
Similes and metaphors are often confused with one another. The main difference between a simile and metaphor is that a simile uses the words "like" or "as" to draw a comparison and a metaphor simply states the comparison without using "like" or "as".
An example of a simile is: She is as innocent as an angel. An example of a metaphor is: She is an angel. Do you see the difference? The simile makes a direct comparison, the metaphor's comparison is implied but not stated.
potassium hydrogen carbonate
Answer:
3
Explanation:
jdidsolslwoekdldloeo we
explain why even though it may be sunny outside its not as warm during the summer
For part of our orbit the northern half of Earth is tilted toward the Sun. This is summer in the northern hemisphere; there are longer periods of daylight, the Sun is higher in the sky, and the Sun's rays strike the surface more directly, giving us warmer temperatures.
Answer:
the sun is further away
Explanation:
ignore
HELP!!!! I NEED THE EQUATION FOR Neptunium-237 undergoes alpha, alpha, beta, gamma, alpha, beta, alpha, gamma, and alpha decay.
I WILL MARK BRAINLIEST!!!!!!!
Answer:
..
Explanation:
3. Could a molecule
contain only one atom?
What number minus 6 equals 58?
Answer: 64
Explanation:
Answer:
64
Explanation: add 6 to 58 and you get 64.
Geologists use radioactive dating to determine the absolute ages of rocks. *
True
False
5. An element becomes an ion with a -3 charge. What is the most likely group on the periodic table that this elements belongs in? *
Scientists have measured a cheetah running across the savanna at 70 m/s. Which of these data accurately measured the cheetah’s speed?
480 m in 6 sec
600 m in 10 sec
210 m in 3 sec
300 m in 5 sec
Answer:
210 m in 3 sec
Explanation:
The speed of the Cheetah is given to be 70m/s .
We know that:
Speed = [tex]\frac{distance }{time}[/tex]
Now we find the choice that gives 70m/s:
480 m in 6 sec
Speed = [tex]\frac{480}{6}[/tex] = 80m/s
600 m in 10 sec
Speed = [tex]\frac{600}{10}[/tex] = 60m/s
210 m in 3 sec
Speed = [tex]\frac{210}{3}[/tex] = 70m/s
300 m in 5 sec
Speed = [tex]\frac{300}{5}[/tex] = 60m/s
So the solution is 210 m in 3 sec
