Answer:
No element shares the same atomic number. The atomic number of every element is unique to itself, just like a fingerprint is unique to a human. The atomic number of element allows us to identify it, like how we can identify a person from their fingerprint.
Explanation:
Can someone please help with this 4 mark question!
Answer:
6.941 u
Explanation:
In a symbolic equation, chemical names are used for reactants and product. True or false
Answer
false
Explanation:
hope it helps.......
This is a false statement!
In the symbolic equation, chemical formulas are used instead of chemical names for reactants and products, while symbols are used to indicate the phase of each substance. It should be apparent that the chemical shorthand method is the quickest and clearest method for writing chemical equations.
What is the relative formula mass of a compound?
Answer:
To find the relative formula mass (M r) of a compound, you add together the relative atomic mass values (A r values) for all the atoms in its formula.
Explanation: Find the M r of carbon monoxide, CO. Find the M r of sodium oxide, Na 2O. The relative formula mass of a substance, shown in grams, is called one mole of that substance.
Cu2O + C -> Cu + CO2 balanced equation
Answer:
2Cu2O + C --> 4Cu + CO2
Explanation
The Law of conservation of Mass states You can not destroy or create math in a chemical reaction, meaning you must have the same amount at the beginning and the end. This equation keeps the same amount of atoms on both sides.
Answer: Yes, it is a balanced equation.
Explanation:
https://chemequations.com/en/?s=Cu2O+%2B+C+%3D+Cu+%2B+CO2
This is where I got the answer so you know. Hope this helps :)
2
CuCl2 +4KI -> 2 Cul + 4 KCI + 12
Answer:
Explanation:
This is an example of a limiting reactant question, and is very common as a general chemistry problem.
We first see the balanced equation, that is:
2CuCl2+4KI→2CuI+4KCl+I2
We first need to find the limiting reactant
We see that 0.56 g of copper(II) chloride (CuCl2) reacts with 0.64 g of potassium iodide (KI) . So, let's convert those amounts into moles.
Copper(II) chloride has a molar mass of
134.45 g/mol . So in 0.56 g of copper(II) chloride, then there exist
0.56g134.45g/mol≈4.17⋅10−3 mol
Potassium iodide has a molar mass of
166 g/mol . So, in 0.64 g of potassium iodide, there exist
if it wrong i am sorry
Someone Please HELP Me
2C4H10(g) + 13O2(g) → 8CO2(g) + 10 H2O(g)
How many liters of O2 are required to produce 3.15g of carbon dioxide?
what are some of the Differces between normal cells and cancer cells?
Answer:
Normal cells are either repaired or die (undergo apoptosis) when they are damaged or get old. Cancer cells are either not repaired or do not undergo apoptosis.
Explanation:
Choose all the answers that apply.
Fluorine (F) has an atomic number of 9 and an atomic weight of 18.99. Fluorine has _____.
at least one isotope
10 neutrons
18 electrons
9 protons
an atomic mass of 19
Answer:
9 protons
Explanation:
By looking at the periodic table, you will see that Fluorine has 9 protons. Since the number of electrons equal the number of protons, Fluorine has 9 electrons as well. Meanwhile, it's mass number of 19, minus 10 neutrons, gives you 9 protons or electrons. Hence, the atom would be Fluorine.
hope u make me brainlesst ʘ‿ʘ
Answer:
i think so for this i will 9 protons . atomic mass is 19. 10 neutrons
How will nuclear fusion change as the sun ages?
Answer:
It won't be good.
Explanation:
In the core of the sun, hydrogen is produced by nuclear fusion. when the sun ages, it starts to run out of the hydrogen. when it runs out, nuclear fusion can't generate heat, and then the sun expands, becoming a red giant.
In the unbalanced chemical equation shown below, what is the coefficient of aluminum (AI) metal?
Al(s) + O2(g) → Al2O3(s)
Answer : A. 3
Explanation:
3Al(s) + 3O2(g) → 3Al2O3(s)
This is the right Answer :3
I hope you are having a great day :3
A solid calcium metal reacts with molecular oxygen.
WORD EQUATION =
CHEMICAL EQUATION =
If a gas occupies 2.3 liters at a pressure of 1.9 atm, what will be its volume at a
pressure of 3.8 atm?
Answer:
Option C (1.2 L) is the correct option.
Explanation:
The given values are:
Pressure,
[tex]P_1=1.9 \ atm[/tex]
[tex]P_2=3.8 \ atm[/tex]
Volume,
[tex]V_1=2.3 \ L[/tex]
[tex]V_2=?[/tex]
As we know,
The gas equation is:
⇒ [tex]PV=nRT[/tex]
At constant temperature,
⇒ [tex]P_1 V_1=P_2 V_2[/tex]
or,
⇒ [tex]V_2=\frac{P_1 V_1}{P_2}[/tex]
By substituting the values, we get
⇒ [tex]=\frac{1.9\times 2.3}{3.8}[/tex]
⇒ [tex]=\frac{4.37}{3.8}[/tex]
⇒ [tex]=1.15 \ L[/tex]
or,
⇒ [tex]=1.2 \ L[/tex]
At the Sprite bottling plant where the temperature is at 235K, each bottle can hold 3.80 atm of pressurized carbon dioxide gas (to make the soda fizzy). At room temperature 298K what is the new pressure?
Answer:
P2 = 4.76 atm
Explanation:
Given:
T1 = 235K. P1 = 3.80 atm
T2 = 298K. P2 = ?
Here, we use Gay-Lussac's law:
P1/T1 = P2/T2
Solving for P2, we get
P2 = (T2/T1)P1
= (298K/238K)(3.80 atm)
= 4.76 atm
Which of the following statements apply to an ionic bond?
Check all that apply.
O A. It is made of two metal atoms.
B. Electrons are shared equally in it.
O C. It is made of two atoms with a large difference in
electronegativity.
O D. It is made of a positive cation and a negative anion.
Answer:
the result is C and D. those are the ansers
Answer:C & D
Explanation:
Just took the test
Pls hurry
Light is the fastest known entity in our universe.
O True
O False
Mark this and return
Save and Exit
Answer:
True
Explanation:
Answer:
true
Explanation:
source(s): trust me bro
what is the coefficient for water after the equation is balanced?
Answer:
1
Explanation:
1: A50 L balloon is at 4 atm of pressure. What is the volume at 2 atm of pressure?
Answer:
100 L
Explanation:
Use Boyle's Law, p1v1 = p2v2.
p1 = 4 atm
v1 = 50L
p2 = 2 atm
v2 = ?
p1v1 = p2v2
(4 atm) (50L) = (2 atm) (v2)
v2 = (4 atm)(50L) / (2 atm) = 100 L
Please help I need on this please and thank you
Explanation:
amount of baking soda = 2.01 g
---> 2.01 g NaHCO3 × (1 mol NaHCO3/84.007 g NaHCO3)
= 0.024 mol NaHCO3
mass of the product = 1.28 g
Possible reactions:
NaHCO3(s) ---> NaOH(s) + CO2(g)
0.024 mol NaHCO3 × (1 mol NaOH/1 mol NaHCO3)
= 0.024 mol NaOH × (39.997 g NaOH/1.mol NaOH)
= 0.96 g NaOH
2NaHCO3(s) ---> Na2O(s) + 2CO2(g) + H2O(g)
0.024 mol NaHCO3 × (1 mol Na2O/2 mol NaHCO3)
= 0.012 mol Na2O × (61.9789 g Na2O)
= 0.73 g Na2O
2NaHCO3(s) ---> Na2CO3(s) + CO2(g) + H2O(g)
0.024 mol NaHCO3 × (1 mol Na2CO3/2 mol NaHCO3)
= 0.012 mol Na2CO3 × (105.9888 g Na2CO3/1 mol Na2CO3)
= 1.27 g Na2CO3
Conclusion:
Based on the mass of the product in the crucible and comparing it with the predicted product mass in different reactions, I conclude that Na2CO3 is the most likely product in the crucible.
79.4 grams of C3H8 are consumed with an excess of oxygen in the reaction 1 C3H8 + 5 O2 --> 3 CO2 + 4 H2O. How many moles of oxygen (O2) are consumed in this reaction?How many moles of carbon dioxide (CO2) are formed in this reaction? &
How many moles of water (H2O) are formed in this reaction?
Answer:
II would say there is co2 so i would say 30.4
Explanation:
Hope this helps
C + O = Co
C + 2O = Co2
law of multiple proportions
sort out
Answer:
"When two or more elements combine to form more than one compound, the mass of one of them, which joins the fixed mass of the other, is in relation to whole numbers and simple" Example: The carbo
an evacuated cylinder has a volume of 50 liters. if 20 liters of nitrogen fas and 20 liters of oxygen gas are pumped into this evacuated cylinder, how much of the cylinder is filled with the two gasses?
The nitrogen gas and the oxygen gas will both occupy 50 liters.
Volume of a gasLet us recall form the kinetic theory of gases that a gas is in constant random motion. The gas does not have a specific volume but takes on the volume of the container since it will expand and fill the container.
The volume occupied by the two gases will be the same as the volume of the container. Hence, the nitrogen gas and the oxygen gas will both occupy 50 liters.
Learn more about volume of a gas: https://brainly.com/question/4519953
Answer:
B. The entire container because gases will expand to fill it.
Explanation:
I took to test, plus it directly says this in the lesson
Copper (II) Oxide (CuO) has atoms that form which type of bond?
Answer:
Copper(II) oxide is a metal oxide that has the formula CuO. It has an ionic structure. It contains a copper(2+). Cupric oxide, or copper (II) oxide, is an inorganic compound with the chemical formula CuO.
Explanation:
I hope that helps you.
Orange juice is a mixture of several substances, including water, sucrose, and citric acid. If a scientist studies samples of many brands of orange juice, which finding is most likely?
A. The samples contain the same substances in a variety of proportions.
B. The samples contain the same substances in a fixed proportion.
C. The water in each sample has a unique set of properties.
Answer:
A. The samples contain the same substances in a variety of proportions.
Explanation:
What is the molarity of a sodium hydroxide solution if 25 mL of the solution is neutralized by 69.5 mL of 1.5 M HCl?
Answer:
4.17M
Explanation:
m1v1/m2v2=n1/n2
When Earth’s axis points away from the sun, the _________ Hemisphere has the longer days of summer.
Nort
Answer: northern hemisphere
Explanation: I looked it up. Plus I took a test with this question and when the teacher went over the answer i got it right.
When iron combines with oxygen gas and forms rust, the total mass of the products...
is the same as the mass of the reactants.
is less than the mass of the reactants.
depends on the reaction conditions.
is greater than the mass of the reactants.
what is difference between asexual or sexual reproduction
Explanation:
asexual reproduction involves 1 parent and produces offspring that are genetically identical to each other and parent.
Sexual reproduction involves 2 parents and produces offspring that are genetically unique.
answer asap
Food caught on fire on a restaurant's stove. How much thermal energy was present?
A. only a little compared to the total amount of energy
B. a lot of the energy was thermal
C. none of the energy was thermal
D. it was mostly potential energy, not thermal
Which of the following reactions is balanced?
Answer:
D
Explanation:
Because it has equal number of elements on each side of the arrow
A student has 475 mL of a 4.5 M HNO3 solution. He leaves the top of the container Monday morning the volume of solution is now 347 mL. What is the conventtration of the solution now
Answer:
6.1 M
Explanation:
Step 1: Calculate the moles of HNO₃ in the initial solution
A student has 475 mL (0.475 L) of a 4.5 M HNO₃ (4.5 mol HNO₃/ L) solution.
0.475 L × 4.5 mol HNO₃/ L = 2.1 mol HNO₃
He leaves the top of the container open, so water will evaporate, but the moles of HNO₃ will remain the same.
Step 2: Calculate the final concentration of the solution
2.1 moles of HNO₃ are in 347 mL (0.347 L) of solution.
[HNO₃] = 2.1 mol / 0.347 L = 6.1 M