Answer:
12.34 amu
Explanation:
Let the 1st isotope be A
Let the 2nd isotope be B
Let the 3rd isotope be C
From the question given above, the following data were obtained:
1st Isotope (A):
Mass of A = 12.32 amu
Abundance (A%) = 19.5%
2nd isotope (B):
Mass of B = 13.08 amu
Abundance (B%) = 26.23%
3rd isotope (C):
Mass of C = 11.99 amu
Abundance (C%) = 54.27%
Atomic mass of X =?
The atomic mass of the element X can be obtained as follow:
Atomic mass = [(Mass of A × A%)/100] + [(Mass of B × B%)/100] + [(Mass of C × C%)/100]
= [(12.32 × 19.5)/100] + [(13.08 × 26.23)/100] + [(11.99 × 54.27)/100]
= 2.402 + 3.431 + 6.507
= 12.34 amu
Thus, the atomic mass of the element X is 12.34 amu
boron phosphite
Formula please help fast please please help me please please help
Answer: The formula for boron phosphite is BP
Explanation:
The answer would be BP
Hope this helped!
What is an intramolecular force?
Answer:
D. A force acting between the atoms within a molecule.
Oxygen is most chemically similar to
Anitrogen
Bsulfur
Cfluorine
Answer:
Nitrogen is the answer
identify this compound: KClO4
Answer: Potassium perchlorate
Explanation:
Is this statement true or false?
Inner planets have many natural satellites.
true false
Answer:
true
Explanation:
we have many sattelites that are seen by many astounouts in space by telescope but more than half space is not discoverd
Deoxyribonucleic acid is also referred to as
The answer is nucleic acid
Answer:
(DNA) is a molecule that encodes an organism's genetic blueprint
Explanation:
Deoxyribo Is the D
nucleic Is the N
acid Is the A
{DNA}
Hope that helps :)
Which of the following is an example of a physical change in digestion?
water being absorbed in the large intestines
enzymes break down food nutrients
nutrients are broken down into different molecules
saliva breaking down carbohydrates
Answer:
The answer would be C
Explanation:
I got it right on E D G E N U I T Y
2021
Please Help! I Really Really Need It!
Answer:
The picteure isnt lodeing
Explanation:
mark brainly
What is another way of describing a freezing point change?
A. Condensation point change
B. Melting point change
C. Evaporation point change
D. Boiling point change
Freezing is the physical change of matter where the solids are formed from the liquids. Freezing point change is described as melting point change. Hence, option B is correct.
What is temperature?
Temperature is the measure of hotness or coldness expressed in terms of any of several scales, including Fahrenheit and Celsius. The freezing point is the temperature at which the vapor pressure of the liquid solvent becomes similar to the vapor pressure of the solid-liquid.
Melting is equivalent to freezing: a temperature when a solid becomes a liquid. Melting and freezing are the two contradicting changes in the phase of matter that involves the solids and the liquids phases. The melting points are higher than the freezing points.
Hence, option B. the melting point change is the correct option.
Learn more about temperature here:
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What do the cells do with the things they absorb
Answer:
Use them as nutrients probably
Which of the following is an example of a decomposition reaction?
A rectangular box has the following dimensions on the inside: 5 cm x 5 cm x 10 cm. What volume can the box hold, in milliliters?
- 20 mL
- 259 mL
- 25 mL
- 50 mL
Answer:
The volume in milliliters is 250mL
Explanation:
The volume of a rectangle is obtained using the equation:
Volume = Length * Width * Height
In the problem, we can take length as 5cm, width as 5cm and height as 10cm. Thus, volume of the rectangular box is:
Volume = 5cm * 5cm * 10cm
Volume = 250cm³
1mL = 1cm³.
That means the volume in milliliters is 250mL
True Or False? A magnet slows down because it created an opposing electric force as it fell.
Answer:
faules
Explanation:
truck it
A coffee cup calorimeter contains 153.21 g of water at 22.50 °C. A 65.454 g piece of iron is heated to 101.62 °C. The piece of iron is added to the coffee cup caloriemter and the contents reach thermal equilibrium at 25.68 °C. The specific heat capacity of iron is 0.449 Jg·K and the specific heat capacity of water is 4.184 Jg·K. How much heat, , is lost by the piece of iron?
Answer:
Q = 2232J
Explanation:
In the system, the energy that is lost by the iron is:
Q = S*ΔT*m
Where Q is heat, S is specific heat of iron ΔT is change in temperature and m is mass of the piece of iron.
S = 0.449J/gK
ΔT = 101.62°C - 25.68°C = 75.94°C
m = 65.454g
Q = 0.449J/gK*75.94°C*65.454g
Q = 2232J
Is this equation balanced as is?
Ca(OH),
Cao
+
H,0
yes
no
Answer:
i think its yes
Explanation:
Answer: the answer is yes
Explanation: I know because I had it on my chemistry test yesterday
Which one of the following is an example of a difficulty caused by thermal
expansion?
O A. The siding on a house buckles on a hot day.
OB. Watery iced tea
OC. Smog in the air during summer heat
OD. lce cream not getting hard
Answer: A
Explanation:just passed it
Answer:
A. The siding on a house buckles on a hot day
Explanation:
The key word in this question is EXPANSION. Without even knowing the siding expands causing it to buckle when it's hot, you can use process of elimination. It can't be answer B because watered down iced tea would most likely be as a result of the ice melting which is the opposite of expanding. It can't be C because air is not solidified and therefore can't expand. Lastly, D cannot be it because ice cream expands when cold, causing it to become hard. If it's not hardening then it's not expanding. This is also the correct answer on a p e.x
12. Which noble gas is expected to show the largest deviations from the ideal gas
behavior?
A) helium
B) neon
C) argon
D) krypton
E) xenon
Balance the following equation:
_ H202 --> _H20+_02
When the equation is balanced, what would be the coefficient in front of H20
Type your answer...
Given :
A chemical equation :
H₂O₂ → H₂O + O₂
Solution :
We can see that there are 2 oxygen atoms in LHS and 3 on RHS .
So, we can reduce the oxygen atoms to two in THS by just dividing it by 2.
H₂O₂ → H₂O + [tex]\dfrac{1}{2}[/tex]O₂
Now, multiplying both sides by 2, we get :
2H₂O₂ → 2H₂O + O₂
Therefore, the balanced chemical equation is 2H₂O₂ → 2H₂O + O₂ .
In plants, what does chlorophyll absorb so photosynthesis can take place?
OA.
water
OB.
gases
OC. energy
OD.
nutrients
Answer:
OC energy
Explanation:
How many atoms are in 1 mole of cobalt atoms?
Answer:
Explanation:
Explanation: NA,Avogadro's number specifies 6.0221×1023 individual particles. It is simply another collective number like a dozen, or a score, or a gross. NA has the property that 6.0221×1023 individual cobalt atoms has a mass of 58.93⋅g
Answer:
6.0221×1023
Explanation:
Is the following equation balanced correctly?
NaCl + H2 Na + 2HCl
When the Bunsen burners quit working at cooper JHS, students had to use candles to heat up their lab samples. At the beginning of class, the candle was 12 cm tall. By the end of class, the candles were 8 cm tall. Did a chemical reaction take place, yes or no? what evidence or lack of evidence do you have to support your answer?
Answer:
Often a chemist needs to heat materials. The Bunsen Burner is one of the most efficient ways of doing this.
Explanation:
Many of the lunar craters are due to volcanic eruptions true or false
Answer:
false
Explanation:
Craters on the Moon are caused by asteroids and meteorites colliding with the lunar surface. The Moon's surface is covered with thousands of craters. ... It also has very little geologic activity (like volcanoes) or weathering (from wind or rain) so craters remain intact from billions of years.
What will cause an object to move?
which of the following statements describes how the ionic bond is formed
a.) nonmetals share electrons with other metals.
b.) metals take electrons from nonmetals.
c.) metals allows their electrons to freely move around other metals.
d.) nonmetals take electrons from metals.
The statement that best describes how the ionic bond is formed is as follows:
Non-metals take electrons from metals.Thus, the correct option for this question is D.
What are Ionic bonds?Ionic bonds may be defined as the type of chemical bond that significantly involves the electrostatic force of attraction between ions of opposite charges, or between two atoms with different electronegativities.
When ionic bonds are formed between atoms or ions, the metal loses electrons and acquires a positive charge over them. They are known as cations. While the non-metals accept those electrons and acquire a negative charge on them. They are known as anions.
Therefore, non-metals taking electrons from metals is one of the statements that best describes the formation of ionic bonds. Thus, the correct option for this question is D.
To learn more about Ionic bonds, refer to the link:
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HELPPPPPP MEEEE‼️‼️‼️Use the equations from
Please help......A 0.01 g bullet travels with a velocity of 1500 m/s. What is its momentum?
Answer:
hope this helps you
Explanation:
Example 1: A 20 kg object has a velocity of 4.5 m/s in the positive x direction. ... What is the momentum of a 3000 kg truck traveling at 25 m/s? 2. A 1500 kg ferryboat has a momentum of 25000 kg∙m/s. ... *A 0.01 kg bullet has a speed of 700 m/s before it strikes a 0.95 kg wooden block ... We will be going outside so please.
Convert 2.5x10^6mm to km
Answer:
2.5 kilometers
Explanation:
please;( urgent CuSO4•5H2O is blue
The energy that plants need for photosynthesis comes from
OA.
minerals,
OB. sunlight
OC.
oxygen
OD.
water.
Answer:
OB sunlight
Explanation:
it grows with it