Answer:
false
Explanation:
Atoms of the same element that differ in their numbers of neutrons are called isotopes. Many isotopes occur naturally. ... Different isotopes of an element generally have the same physical and chemical properties because they have the same numbers of protons and elec
Answer:
False
Explanation:
It says that it may not have the same physical properties but it always have the same physical properties.
5 is equal to 4 times that number
NEED HELP PLSSS
Compound A has a mass of 20.00 u. Compound B has a mass of 60.00 u. How will the number of molecules in 5.00 g of Compound A compare to the number of molecules in 15.00 g of Compound B
A reaction gives off 35.6 kJ how many calories is this?
What 58x999what is fifty eight times 999
Answer:
58x999 is equal to 57,942
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difference between shell and subshell?
How can an organic compound exist without single bonds between the carbons?
Answer:
Carbon atoms can form double bonds by sharing two pairs of electrons; they can also form triple bonds by sharing three pairs of electrons.
Carbon atoms can form double bonds by sharing two pairs of electrons; they can also form triple bonds by sharing three pairs of electrons.
What is an organic compound?An organic compound is any of a large class of chemical compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or nitrogen.
A carbon atom can participate in a maximum of four bonds; either four single bonds, two single bonds and a double bond, or one single bond and a triple bond.
A double bond is formed when two atoms use two electron pairs to form two covalent bonds; a triple bond results when two atoms share three electron pairs to form three covalent bonds.
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The third step in the Decision Making process is to list your pros and cons for each option.
A pro and Con is ___________about each option.
A
Something positive and negative
B
Something positive
C
Something negative
D
None of the answers
Answer:
A. Something positive and negative
Explanation:
In the chemical reaction below, sodium would be considered a 2Na + Cl2 --> 2 NaCl O catalyst O intermediate product restant
Answer:
Reactant
Explanation:
The chemical expression is given as:
2Na + Cl₂ → 2NaCl
The species on the left hand side which are Na and Cl₂ are referred to as the reactants.
The specie on the right hand side, NaCl is the product of the reaction.
There is no catalyst shown in this reaction.
Such a reaction as this is called a combination reaction or synthesis reaction in which two reactants gives rise to a product.
Why do people say air is a poor conductor , but isn't conduction happens in solid?
Explanation:
It is mainly the very low density of gases that make them bad conductors of heat. In liquids and solids atoms and molecules are densely packed and transfer of energy has much smaller distances to happen.
hope it helps u
a family travels 110 km east to spend the night in a hotel. the next day they drive back home, but after traveling 45 km west they decided to stop and visit with friends for the night. find the distance and displacement of the family
Answer:
distance-155
displacement-65
Explanation:
this is what i got and it may be wrong
To solve this we must be knowing each and every concept related to displacement and distance. Therefore, the distance and displacement of the family are 110 km and 65Km respectively.
What is displacement?The separation between two places of an item in motion is known as displacement. Therefore, it relies on both the starting position and the ending position. Displacement is also the shortest distance between the initial and ultimate places.
The meter is used as the calculation's standard unit since it measures distance (m). Displacement is an important notion in many applications in physics. The distinction between two locations of an object is known as displacement. Because it has both a direction and magnitude, it qualifies as a vector quantity.
distance=110 km
displacement= 110 km- 45 km
=65Km
Therefore, the distance and displacement of the family are 110 km and 65Km respectively.
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14. Aluminum reacts with a certain unknown element (element X) to form the following formula. Which group must element X belong to? *
Answer:
c
Explanation:
plzzz helppp!!!
How long would it take you to travel 8 miles at a speed of 1 mile per hour?
Answer:
It would take you 8 hours.
Explanation:
This would take you 8 hours because you are going 1 mile an hour. So in 1 hour, you would have gone 1 mile.
Look at the following equation.
_N2 + _H2 - _NH3
In order to follow the law of conservation of mass, this equation must have which set of coefficients, in order from left to right?
A.
1,3,2
B.
3, 3, 1
C.
2,2,2
D.
2,3,1
Answer:
A
Explanation:
_N2 + _H2 - _NH3
LHS RHS
N=2×1=2 N=1×2=2
H=2×3=6 H=3×2=6
1,3,2
A problem is usually posed in the form of
A Experiment
B Method
C Question
Answer:
A i did it on edge
Explanation:
Aaaaaaaaaaaaaaa
A car traveled 210 km in 3.5 hours. What was its average speed in km per hour?
OA. 60
OB. 70
OC. 40
OD. 75
Answer:
A) 60
Explanation:
Given data:
Distance traveled by car = 210 km
Time taken = 3.5 hour
Speed of car = ?
Solution:
Formula:
S = d/t
s = speed of car
d = distance
t = time
by putting values,
s = 210 km / 3.5 hour
s = 60 km/hour
What are the coefficients that would correctly balance this equation? ____Zn + ____K₂CrO₄→ ____K + ____ZnCrO₄
Answer:
Zn + K2CrO4 -----> 2K + ZnCrO4
Explanation:
Can someone plz help me :
Answer:
B
Explanation:
A arrow sign is -->
A equal sign is =
And, the plus sign is +
Which means the only option left is B Coefficient!
Hope this helps!
Need answer immediately. For college homework. Organic Chemistry.
Here's the question written out so others can find it if they need:
Provide a structure for the following compound: C6H16N2; IR: 3281 cm–1; 1H NMR: δ 1.1 (8H, t, J = 7 Hz), δ 2.66 (4H, q, J = 7 Hz), δ 2.83 (4H, s). (Hint: The triplet at δ 1.1 conceals another broad resonance that contributes to the integral.)
THIS IS THE ANSWER: CH3-CH2-NH-CH2-CH2-NH-CH2-CH3
I hope this helps! Please give Brainliest if you feel this helped. Have a good day and a good rest of your 2021, best of luck with your classes.
Answer:
the answer is below.
Explanation:
CH3-CH2-NH-CH2-CH2-NH-CH2-CH3
What other features would you expect to find near the Ring of Fire on volcanoes?
Answer:
i dont know u tell me thats why i am here
Explanation:
BRAINLIEST FOR THE FIRST ANSWER How are isotopes used in industry?
Answer: Radioisotopes are used by manufacturers as tracers to monitor fluid flow and filtration, detect leaks, and gauge engine wear and corrosion of process equipment. Small concentrations of short-lived isotopes can be detected whilst no residues remain in the environment.
Explanation: Uranium-235 is used for nuclear fission and as a fuel in nuclear reactors.
An isotope of cobalt is used in the treatment of cancer.
An isotope of iodine is used in the treatment of goiter.
Na2CO3(aq) + CaCl2(aq) — 2 NaCl(aq) + CaCO3(s)
Calculate the volume (in mL) of 0.200 M CaCl, needed to produce 2.00 g of CaCO3(s). There is an excess of Na2CO3.
Molar mass of calcium carbonate = 100.09 g/mol
Answer:
100 mL
Explanation:
Given data:
Mass of CaCO₃ produced = 2.00 g
Molarity of CaCl₂ = 0.200 M
Volume of CaCl₂ needed = ?
Solution:
Chemical equation:
Na₂CO₃ + CaCl₂ → 2NaCl + CaCO₃
First of all we will calculate the number of moles of CaCO₃.
Number of moles = mass/molar mass
Number of moles = 2.00 g / 100.09 g/mol
Number of moles = 0.02 mol
Now we will compare the moles of CaCO₃ and CaCl₂.
CaCO₃ : CaCl₂
1 : 1
0.02 : 0.02
Thus, 0.02 moles of CaCl₂ react,
Volume of CaCl₂ reacted:
Molarity = number of moles / volume in L
0.200 M = 0.02 mol / volume in L
Volume in L = 0.02 mol / 0.200 M
Volume in L = 0.1 L
Volume in mL:
0.1 L × 1000 mL/1L
100 mL
HELP!!! An experiment was conducted to determine if the intermolecular forces in two liquids affects their boiling points. Each liquid was sprayed on a paper towel. Each
paper towel was wiped across a glass table to moisten the surface. The table shows a partial record of the experiment.
Experimental Record
Liquid Intermolecular Forces ?
А
relatively strong
B
relatively weak
What information should be recorded in the last column of the table?
Time taken by the liquids to start boiling
Time taken by the glass surface to dry
Volume of liquid required to moisten the paper towels
Time taken by the paper towels to become completely moist
Answer: it would be b time taken by the glass surface to dry
Explanation:
i had took the test and i got it right
Answer:
B: Time taken by the glass surface to dry
Explanation:
because if you go to a store and buy two different brands like for example you but windex or invisible glass then you can say for example if i use windex it will dry faster and with invisible glass i will take longer to dry but if you use windex witch drys faster then you will not have streaks on the table when someone sits. and i also got it right
What kind of reaction is this
Na2O + CO2 → Na2CO3
Answer:
Explanation:
Na 2O + CO 2 → Na 2CO. 3
This is an acid-base reaction (neutralization): Na 2O is a base, CO 2 is an acid.
Hope this helps!!!!!!
Brainlist please
The reaction of N₂O with CO₂ giving Na₂CO₃ is a combination reaction, where two reactants combines to form a product.
What are types of reactions?There are different kinds of reactions namely, displacement reactions, combination reactions, decomposition reaction etc.
The reaction in which one reactant species displace the constituent group of another reactant it is termed as displacement reactions. On decomposition reaction, one reactant decomposes into two or more products.
In a single displacement reaction, one of the group is displaced to form a new product and in double displacement reactions, two species from reactant side are displaced.
Similarly, a reaction in which two reactants simply combines to form a product is termed as combination reaction.
Therefore, the type of the given reaction is combination.
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What kind of waves can travel through a vacuum?
Mechanical waves
Electromagnetic waves
All of the above
None of the above
Please help ASAP
Answer:
electromagnetic wave
Explanation:
Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate.
Kinetic energy is energy of motion. What below is considered to be a form of kinetic energy?
Answer:
In physics, the kinetic energy of an object is the energy that it possesses due to its motion It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity Having gained this energy during its acceleration the body maintains this kinetic energy unless its speed changes
Example:
A semi-truck travelling down the road
A river flowing at a certain speed
help? It’s question 9
Answer:
a
Explanation:
its a
Find the density of an object that has a mass of 66 g and a volume of 10 cm?
a.)660 g
b.)6.6 g/cm^3
c.)0.15 cm 3/g
d.)6.6 cm 3/g
Answer:
B
Explanation:
Density = mass / volume
66 grams / 10 cm = 6.6 g per cubic cm
Identify the following as physical (P) or chemical (C) changes.
1. NaCl (Table Salt) dissolves in water. ______
2. Milk sours. _____
3. Ag (Silver) tarnishes. ______
4. Sugar dissolves in water. _____
5. Wood rots. _____
6. Heat changes H2O to steam. ______
7. Baking soda reacts to vinegar. ______
8. Iron (Fe) rusts_____
Answer:
1. chemical
2. chemical
3. chemical
4. physical
5. chemical
6. physical
7. chemical
8. chemical
Answer:
All are correct
Explanation:
I agree with all except the first one
Ideal Gas Law Test
11 have 1.9 moles of gas held at a pressure of 5 atm and in a container with a volume of S0 liters, what is the temperature of the gas?
O 1603 K
O 273 K
O 0.0006
O 0.0006 K
Answer:
T = 1603 K
Explanation:
Given data:
Number of moles of gas = 1.9 mol
Temperature of gas = ?
Pressure of gas = 5 atm
Volume of gas = 50 L
Solution:
The given problem will be solve by using general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
By putting values,
5 atm × 50 L = 1.9 mol × 0.0821 atm.L/ mol.K × T
T = 250 atm.L / 1.9 mol × 0.0821 atm.L/ mol.K
T = 250 atm.L /0.156 atm.L/K
T = 1603 K
the numerus rocks orbiting the sun between jupiter and mars are classified as----
