0.342 mol Ca
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
13.7 g Ca
Step 2: Identify Conversions
Molar Mass of Ca - 40.08 g/mol
Step 3: Convert
Set up: [tex]\displaystyle 13.7 \ g \ Ca(\frac{1 \ mol \ Ca}{40.08 \ g \ Ca})[/tex]Multiply/Divide: [tex]\displaystyle 0.341816 \ mol \ Ca[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
0.341816 mol Ca ≈ 0.342 mol Ca
SEnD NuuuDdddeeeeSss I you acccalty do you will get crown
Define energy and power then describe the relationship that exists between them.
Try for at least 3 complete sentences
Sentence starters:
Energy is.... Power is.... They are related because.....
Answer: With power and energy, power is units of energy divided by time. The same difference as distance and velocity. The units of power are watts, the units of energy are joules.
Explanation:
abcdefghijklmnopqrstuvwxyzExplanation:abcdefghijklmnopqrstuvwxyz
What element would be found in period 5 that has similar chemical properties to Al?
Answer:
Indium
Explanation:
That is Indium (In) which is in same group as Al
What do the molecules do when they gain more kinetic energy and how does that affect the density?
The more kinetic energy a substance has, the warmer it will be and the faster particles will be moving, which reduces the density of the substance
How does thermal energy affect chemical changes
Answer:
It makes chemicals hot or cold which makes chemicals react differently
Explanation:
mark me brainliest
What do we know about the number of protons and electrons for any element found on the periodic table?
Answer:
Atoms are neutral in electrical charge because they have the same number of negative electrons as positive protons (Table 4.5. 1). Therefore, the atomic number of an atom also tells you how many electrons the atom has. This, in turn, determines many of the atom's chemical properties
Explanation:
Please select the word from the list that best fits the definition
stage in a star's evolution formed as the core of a main sequence star uses up its helium and the outer layers escape into
Explanation:
Giant Gas Cloud. A star originates from a large cloud of gas. ...
Protostar. When the gas particles in the molecular cloud run into each other, heat energy is produced. ...
T-Tauri Phase. ...
Main Sequence. ...
Red Giant. ...
The Fusion of Heavier Elements. ...
Supernovae and Planetary Nebulae
a sample of 1.7×10^23 molecules of silicon is ____ moles.
Answer:
0.28moles of silicon
Explanation:
Given parameters:
Number of molecules of silicon = 1.7 x 10²³molecules
Unknown:
Number of moles of the silicon = ?
Solution:
A mole of any substance contains the Avogadro's number of particles.
1 mole of a substance contains 6.02 x 10²³molecules;
So;
1.7 x 10²³molecules contains [tex]\frac{1.7 x 10^{23} }{6.02 x 10^{23} }[/tex] = 0.28moles of silicon
Which of the following options shows metallic bonding:
1.silver spoon
2.
bronze medal
3.
solid table salt
Answer:
bronze medal i guess
i hope its correct.
Explanation:
Answer:
silver spoon
Explanation:
i had this for castle learning and guessed this and it was right
Urgent!!! Label these please!
Answer:
sorry but what is that what will do to thatHow does science affect our lives on the example of the pandemic?
Science affected our lives at the beginning of this pandemic.
Explanation:
Although scientists did study the virus to see how deadly it is the pandemic kept spreading. The spreading of the virus was not the scientist's fault it was the citizens' fault. They now found a vaccine that took hard work and a short amount of time.
H2O+O2=H202, how would I balance this equation?
Answer:
2H2O2→2H2O+O2
Explanation:
This reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.
Add 2 molecules of hydrogen peroxide and 2 molecules of water. Since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.
2H2O2→2H2O+O2
A compound decomposes by a first-order process. If 37 % of the compound decomposes in 60 minutes, the half-life of the compound is ________minutes.
Answer:
90 minutes
Explanation:
The half life of a first order reaction is;
t1/2 = ln(2) / k
To solve for t;
The integral rate expression for a first order reaction is;
ln[A] = ln[Ao] - kt
t = 60 minutes
Final Concentration = [A] = 100 - 37 = 63
Initial Concentration = [Ao] = 100
ln(63) = ln(100) - k (60)
k (60) = ln (100) - ln(63)
k = 0.4620 / 60 = 0.0077
Inserting the value of k in the half life equatin;
t1/2 = ln(2) / 0.0077 = 90 minutes
Which of the following is an example of potential energy?*
A firework exploding.
O A race car gaining speed towards the finish line.
O A phone sitting on the desk.
O Boiling water.
boiling waterAnswer:
Explanation:
its called thermal energy
How would you solve this?
What is the general form of a single replacement reaction
Answer: A. AB+C->CB+A
Explanation:
The chemical reaction includes the reactant and products. The single replacement reaction can be given as AB + C → CB + A. Thus option a is correct.
What is a single replacement reaction?A single replacement reaction is the exchange reaction that involves the substitution of a single element of the reactant with another element of the reactant species.
The reaction between zinc and copper chloride is a single replacement reaction as copper is replaced by zinc in the copper chloride compound to produce zinc chloride and copper.
Therefore, option A. AB + C → CB + A is the single replacement reaction.
Learn more about single replacement reaction here:
https://brainly.com/question/13903783
#SPJ2
4) What is one advantage of using non-renewable resources?
Answer:
The main advantages of non-renewable energies is that they are abundant and affordable. For example, oil and diesel are still good choices for powering vehicles. Non-renewable energy is cost effective and easier to product and use.
Explanation:
there yah go
What information can be deduced from knowing which Group an element belongs?
A. Family name
B .Number of valence electrons
C. Chemical properties
D. All the above
Answer:
D. All of the above
Explanation:
Elements are being grouped in the "Periodic Table" in order to associate them with other elements that have similar properties. These elements also have the same number of "valence electrons" or electrons located in the outer shell. The groups are then classified into their "family names." For example, Group 1 is named "Alkali metals" because the elements within it are very reactive and have high conductive property. The valance electron of the elements in this group is "1."
PLEASE ANSWER ITS DUE IN ABOUT AN HOUR!! What other body system does the diaphragm belong to?
Answer:
The respiratory system
Explanation:
Answer:
The diaphragm belongs to the respiratory system, digestive system, and muscular system.
I'm not too sure on the muscular system, but the other two 100%
Explanation:
Hopefully, this helps. :)
Please help me!
Thank you
Name the four different types of Spheres belonging to Earth and give examples of Renewable resource and the Biotic factors that exist in those spheres. There are three Abiotic (Non Living) spheres and the Biotic (Living)Biosphere exist within the three of the others
Write a short summary of the renewable resources in each sphere and explain how the biosphere interacts within the three of them
Answer:
Everything in Earth's system can be placed into one of four major subsystems: land, water, living things, or air. These four subsystems are called "spheres." Specifically, they are the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air).
Explanation:
Which best describes MgO?
1)This is an ionic compound; it is named
magnesium monoxide.
2)This is a covalent compound; it is named
magnesium monoxide.
3)This is an ionic compound; it is named
magnesium oxide.
4)This is a covalent compound; it is named
magnesium oxide.
the mass of the sun
what is the mass of the sun
Answer:
1.989 × 10^30 kg
Explanation:
Hope this helps! :3
☁️ Answer ☁️
A solar mass is the mass of the sun. Or, more precisely, it's 1.989 x 10^30 kilograms — about 333,000 Earths. Astronomers use a solar mass as a basic unit of mass.
Dear fool, you will always be a fool.
Happy April Fools Day.
Hope it helps.
Have a nice day noona/hyung
Which of the following is true of fault-block mountains and volcanic mountains but not true of folded mountains?
The Answer is not D
Form from the buildup of lava and ash
May have a steeply sloping, jagged appearance
May have a gently sloping, dome-shaped appearance
Form at both convergent and divergent plate boundaries
Answer:
This one seems tricky, but the answer is B.
Explanation:
The first answer choice is wrong because it only applies to volcanic mountains.
C. would be true for folded mountains and volcanic mountains, but not fault-block mountains. Fault-block mountains have steep slopes and jagged surfaces; hence why B is correct.
D. is wrong because it applies to all three types of mountains mentioned.
Really, volcanic mountains can have gentle slopes and steep slopes, as well as jagged appearances and dome-shaped appearances. All that has to be assessed is the characteristics of fault-block mountains. This would be described in answer choice B.
What is the name of the family highlighted of
the periodic table above? How many valence
electrons does it have?
How many elements and how many atoms are in MgCI2
Answer: two elements and three atoms
Explanation:
An element is the simplest substance and hence cannot be broken down using chemical reactions.
Magnesium chloride [tex](MgCl_2)[/tex] is an ionic compound formed by the transfer of electrons from element magnesium (Mg) to element chlorine (Cl) where Magmesium forms a cation [tex]Mg^{2+}[/tex] by losing two electrons and chlorine forms an anion [tex]Cl^{-}[/tex] by gaining electron.
There are 3 atoms in Magnesium chloride [tex](MgCl_2)[/tex] which include one atom of magnesium (Mg) and two atoms of chlorine (Cl).
How many atoms of hydrogen and oxygen are in 2 molecules of water? ... 7) Using complete sentences, explain the difference between the chemical ... (s) solid, (l) liquid, (g) gas, (aq) aqueous solution (dissolved in water).
Answer:
its 25
Explanation:
Answer:
your answer should be c i had this qs before
Explanation:
5.Calculate the number of moles of 18.0 dm3 of carbon monoxide (CO) at rtp.
Answer:
0.81mole
Explanation:
Given:
Volume of carbon monoxide = 18dm³
Unknown
Number of moles of carbon monoxide = ?
Solution:
To solve this problem;
1 mole of any gas at rtp occupies a volume of 22.4dm³
So;
x mole of carbon monoxide will occupy a volume of 18dm³ at rtp
22.4x = 18
x = [tex]\frac{18}{22.4}[/tex] = 0.81mole
does anyone have the answer key to half life gizmos !!!!!!!!!!!
PLEASE ANSWER ASAP!! Would a chemical being corrosive be a chemical property or a physical property?
Answer:
corrosiveness is a chemical property