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
True Or False? A magnet slows down because it created an opposing electric force as it fell.
Answer:
faules
Explanation:
truck it
Energy is the ability to do __________.
What will cause an object to move?
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!
When you add water to a strong acid what happens to the pH of the solution
please;( urgent CuSO4•5H2O is blue
Which of the following is an example of a decomposition reaction?
What do the cells do with the things they absorb
Answer:
Use them as nutrients probably
Oxygen is most chemically similar to
Anitrogen
Bsulfur
Cfluorine
Answer:
Nitrogen is the answer
Match the following family of elements to its group.
Explanation:
To solve this problem, we simply use the periodic table of elements which groups elements based on their atomic numbers.
The atomic number of an element is the number of protons it contains. The protons are the positively charged particles within an atom.
The vertical arrangement of elements on the periodic table is the group. The horizontal arrangement of elements is the period.Now;
Noble gases belongs to group 18
Alkali earth metals belongs to group 2
Halogens belongs to group 17
Alkali metals belongs to group 1
Transition metals belongs to group 3-12
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
A chemical bond I i which 2 pairs of electrons are shared between two atoms
Double Covalent Bond
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 .
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
PLEASE HELP ASAP
Show all work and include units when necessary for full credit!
An isotope of element X has a mass of 12.32 amu and a relative abundance of 19.5%; a second isotope has a mass of 13.08 amu and a relative abundance of 26.23%; the third isotope in the sample has a mass of 11.99 amu and a relative abundance of 54.27%. Calculate the atomic mass of element X
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
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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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
HELPPPPPP MEEEE‼️‼️‼️Use the equations from
What is an intramolecular force?
Answer:
D. A force acting between the atoms within a molecule.
The infections that people get while they are in hospitals are commonly resistant to multiple drugs. What is a reason for the increased number of drug-resistant bacteria being found in hospitals?
A.
increased use of antibiotics in hospitals
B.
increased number of diseases in patients
C.
decreased sanitation facilities in hospitals
D.
decreased microbial growth in hospitals
Explanation:
d
hdjdjdjdjejdjjeuwuwuw
Answer:
D
Explanation:
I have this test as well
Which part of an atom is used to form bonds with other atoms?
Answer:
valence electrons
Explanation:
valence electrons
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 mass of Cl2, in grams is contained in a 10.0L tank at 27oC and 3.50 atm pressure ? a. 1.42 grams b. 142 grams c. 1.01 kg d. 101 grams
Answer:
the correct answer is A
Explanation:
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
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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Calculate the number of moles in 35.7 g of CH4
Answer:
[tex]\boxed {\boxed {\sf About \ 2.23 \ moles \ CH_4}}[/tex]
Explanation:
First, find the molar mass of CH₄
This compound is made of carbon (C) and hydrogen (H). Look on the Peirodic Table for the masses of both elements.
Carbon: 12.011 g/molHydrogen: 1.008 g/molNow, count the number of moles in the compound. There is no subscript on C, indicating 1 mole. There is a subscript of 4 on H, indicating 4 moles. We must multiply the molar mass of hydrogen by 4.
1 Carbon: 12.011 g/mol 4 Hydrogen: (4 * 1.008 g/mol)= 4.032 g/molAdd the 2 masses.
12.011 g/mol + 4.032 g/mol = 16.043 g/molNext, find the number of moles in 35.7 grams.
Use the molar mass of CH₄ as a ratio.
[tex]\frac{16.043 \ g \ CH_4}{1 \ mol \ CH_4}[/tex]
Since we want the units of grams CH₄ to cancel when we multiply, we must flip the ratio.
[tex]\frac{1 \ mol \ CH_4}{16.043 \ g \ CH_4}[/tex]
Multiply by 35.7 grams.
[tex]35.7 \ g \ CH_4 *\frac{1 \ mol \ CH_4}{16.043 \ g \ CH_4}[/tex]
The grams of CH₄ will cancel each other out. Since there is a 1 in the numerator, we can also move 35.7 to the numerator.
[tex]35.7 *\frac{1 \ mol \ CH_4}{16.043 }[/tex]
[tex]\frac{35.7 \ mol \ CH_4}{16.043}[/tex]
[tex]2.22526959 \ mol \ CH_4[/tex]
The original measurement given, 35.7 grams, has 3 significant figures (3, 5, and 7), so we must round to 3 sig figs.
For this number, it is the hundredth place.
The 5 in the thousandth place tells us to round the 2 to a 3.
[tex]2.23 \ mol \ CH_4[/tex]
There are about 2.23 moles of CH₄ in 35.7 grams.
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:
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:
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.