How many total atoms in 5 mg(NO3)2
Answer:
5 Mg (magnesium), 2 N (nitrogen), and 6 O (oxygen) -- total of 13 atoms
There are 45 as 1 mg(NO3)2 = 9 atoms.
Convert 15oc to K
(l’ll mark you as brainlister)
Answer:
15oC to K
oC +273
15+273
288K
How many moles of MgO are produced if 0.37 moles of O2 react with excess of Mg?
Answer:
yez so the answer is mg 1.0
Explanation:
The excess reactant is present in an amount that is greater than required. The amount of MgO that is produced in the reaction is 0.74 moles.
What is an excess reactant?An excess reactant is that reantant thatis present in an amount that is more than required.
Now we are told that the magnessium is the reactant in excess so we have to use the amount of oxygen.
The reaction is: 2Mg + O2 ---->2MgO
1 mole of O2 produces 2 mole of MgO
0.37 moles of O2 produces 0.37 moles * 2 moles/1 mole
= 0.74 moles
Learn more about excess reactant: https://brainly.com/question/365923
what is computer hardware in short?
Answer:
computer hardware is a collection of a physical part of a computer system
examples = CPU , monitor , mouse etc
Which of the following chemical reactions produces water via a
synthesis reaction?
a 2H2 + O2 + 2H2O
b NaOH + HCI - NaCl + H2O
C CuO + H2 - Cu + H2O
d H2CO3 → CO2 + H2O
Answer:
Should be A, but also I think there should be an arrow between O2 and 2H2O
Please help me, I am confused
Answer:
B
Explanation:
Ionic compound can conduct electricity
What is the missing word. Please Help Me. Thank you!!
Before adding to the cell, aluminium oxide is mixed with _____________ to lower its melting point.
How did chemists make their proposed model of the sub atomic particles?
Answer:
Because they want to clarify or give solution to the particle that the other didn't know
Explanation:
Correct me if im wrong thanks
The inflation of airbags is due to the breakdown of a single chemical substance into two separate substances.
Two molecules of sodium azide (NaN3) break down into sodium (Na) and nitrogen gas (N2) during the reaction.
How many sodium (Na) atoms are produced in the reaction?
1 Na atom
2 Na atoms
3 Na atoms
Answer:
The correct answer would be
B. 2 Na atoms
Explanation:
As seen in the picture below,
True or false Compounds link up to make elements
Answer:
false
compound are formed from elements .
13. If a chemist has 12.3 moles of N H 03, what is the mass of the sample?
Answer:
209.4831 g
Explanation:
number of moles × molar mass = mass of substance in g
12.3 × ( 14.0067 + 1.00484 × 3 ) = 209.4831 g
How many grams are in 2.50 moles of copper?
Answer:
There are 63.546 grams in a 2.50 moles of copper.
What’s the answer? I need an answer as soon as possible please!
Answer:
1, 1, 2
Explanation:
1, 1, 2
4 Hydrogen has three naturally occurring isotopes. H.1, H-2, and H-3 The atomie mass of Hydrogen is 1.097 Which isotope is most abundant in nature? Explain
Answer:
The number following the name of the element is the number of subatomic particles inside the nucleus of the atom. This means that it is the mass number of the isotope. The average atomic mass of the element is the sum of the products of the percentage abundance and mass number of the naturally occurring isotopes.
Since, the average atomic mass of the hydrogen is nearest to 1 then, the most abundant isotope should be hydrogen-1.
If more reactants are used in a chemical reaction, more products will be
produced. This is because *
1 point
More reactants have more atoms to react to form more products
More reactants take up the same volume
Too many products can slow down the reaction
More reactants cause the reaction to heat up
More reactants have more atoms to react to form more products.
More reactants have more atoms to react to form more products in a chemical reaction.
What is a Chemical reaction?This is the process which involves two or more molecules known as reactants collide with the right orientation and force to form a new product.
Increase in reactants means presence of more molecules involved in the reaction thereby leading to the formation of more product.
Read more about Chemical reaction here https://brainly.com/question/11231920?source=archive
A weight of 8.7 N is attached to a spring that has a spring constant of 190 N/m. How much will the spring stretch?
Given values are:
Force, Fs = 8.7 NSpring constant, k = 190 N/mAs we know the relation,
→ [tex]Fs = K\times x[/tex]
or,
→ [tex]x = \frac{Fs}{k}[/tex]
By putting the values, we get
[tex]= \frac{8.7}{190}[/tex]
[tex]= 4.6\times 10^{-2} \ m[/tex]
Thus the response above is right.
Learn more about spring constant here:
https://brainly.com/question/15404289
Which type of reaction occurs in the following?
2HgO(s) Right arrow. 2Hg(l) + O2(g)
a decomposition reaction in which a metal is reduced
an acid-base neutralization reaction to produce oxygen gas
a displacement reaction involving two metals
a combustion reaction involving burning a metal in oxygen
Answer:
decomposition
Explanation:
the reactants turn into two different products, thus the reaction is decomposition.
AB -> A + B
Answer:
A: a decomposition reaction in which a metal is reduced
Explanation:
HgO is actually the metal Mercury and in the equation Mercury is being decomposed into the elements Hg and O. (the element for Mercury and Oxygen) So the equation they give you is a decomposition.
Can someone please help I need help?!?!
Answer:
a: 6 moles
b: 6.75 moles
c: 5 grams
Explanation:
a: mole ratio 2:3
b: mole ratio 2:3
c: mole ratio 2:2
Why is think chemistry is important? i need 5 paragraph please
Answer:
because it is so fundamental to our world . chemistry plays a role in everyone lives.
It touches almost every aspect of our existence in some way.
Chemistry is essential for meeting our basic needs of food, cloth, etc.
Chemistry plays a important and useful role towards the development and growth of industries.
chemistry also helps you become who you want to be.
Mixing salt with sugar is a chemical change true or false?
Answer:
False unless you add something else with the like the common sugar ice and salt science project.
Explanation:
Answer:
No
Explanation:
No, mixing salt and sugar is not a chemical reaction. Chemical reactions result in the change of chemical composition of one or more substances(it is no longer able to be turned back to normal
Question 1
1. Na2O + H20 --->
NaOH
A. Single Replacement
B. Double Replacement
c. Decomposition
D. Synthesis
E. Combustion
Answer: D. Synthesis
Explanation:
Sodium Oxide + Water = Sodium Hydroxide
"Don't use such phrases here, not cool! It hurts our feelings :( "
IS THE COMMENT EVERY DANG TIME YOU TRY TO TYPE ANYTHING TO POST! anyone else having this problem?
Answer:
ye, i always have that problem. my stuff gets deleted too :'((
What mass of iron is formed when 240 g of iron(III) oxide reacts completely with carbon monoxide?
Answer:
168 g
Reaction:
[tex]Fe_{2}O_{3} + 3 CO >>> 2 Fe + 3CO_{2}[/tex]
Explanation:
First we need to figure out what is the formula mass (Mr) of Fe2O3 (Iron(III) oxide).
The atomic mass of Fe=56, O=16
Mr= 56+56+16+16+16=160 g/mol
We can now figure out the moles of the iron:
240/160 = 1.5 mol
Then we need to find the ratio to make Fe.
In the reaction, we know that 1 mole of Fe2O3 can make 2 moles of Fe. So 1.5 moles of Fe2O3 can make 3 moles of Fe.
And then we need to find the mass of the Fe.
3×56=168 g.
Hence 168g of the iron is made after the reaction.
Please help me with dis
Answer:
c
Explanation:
How to convert celcius to Kelvin?
Answer:
temperature
Explanation:
What are the coefficients needed to balance
the following chemical equation?
--- N2 + --- F2 ---> --- NF3
The balanced equation:
N2 + 3 F2 ---> 2 NF3
What do u mean by electronic configuration? What are basic requirements while writing electronic configuration of an element (atom) ?
The basic requirement while writing the electronic configuration of an element (atom) is its atomic number.
Explanation:
The electronic configuration of an element is the distribution of its electrons in different energy levels around the atomic nucleus.It only requires an atomic number of an element to write its electronic configuration.The atomic number is equal to the number of protons in an atom and that is equal to the number of electrons.And the filling of electrons is done according to the Aufbau principle, the electrons will be first filled in the atomic orbitals with lower orbital energy before filling the atomic orbital with higher energy.The sequence of the atomic orbitals from lower energy to higher energy is:[tex]1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d...[/tex]
For example:
The atomic number of gallium is 31, its electronic configuration will be:
[tex][Ga]=1s^2 2s^2 2p^63s^2 3p^6 4s^2 3d^{10} 4p^1[/tex]
Learn more about an electronic configuration of an atom here:
brainly.com/question/11628377
brainly.com/question/18444398
Can anyone help me with this algebraic expression
(4a+3b)² (3a-4b)²
Answer:
=144a⁴−168a³b−239a²b²+168ab³+144b⁴
Explanation:
=144a⁴−168a³b−239a²b²+168ab³+144b⁴
Answer:
[tex](4a + 3b)(4a + 3b)(3a - 4b)(3a - 4b) \\ {16a}^{2} + 12ab + {9b}^{2} + 12ab + {9a}^{2} + 12ab + 12ab + {16b}^{2} \\ {16a}^{2} + {9a}^{2} + {9b}^{2} + {16b}^{2} + 12ab + 12ab + 12ab + 12ab \\ {25a}^{2} + {25b}^{2} + 48ab[/tex]
Why the bond in water molecule os polar covalent bond, while than in chlorine molecule is pure covalent bond? Give reason?
Explanation:
The unequal sharing of electrons between the atoms and the unsymmetrical shape of the molecule means that a water molecule has two poles - a positive charge on the hydrogen pole (side) and a negative charge on the oxygen pole (side). We say that the water molecule is electrically polar.
I need help with this question
Answer:
B
Explanation:
it's all about the genetics of the horse