Answer:
26.981539
Explanation:
500 mL solution of calcium chloride with a concentration of 0.75 mol/L. The mass of solute needed to make this solution is ___ ___ ___ ___ g.
Answer:
41.63g
Explanation:
Given parameters:
Volume of CaCl₂ = 500mL = 0.5L
Concentration = 0.75mol/L
Unknown:
Mass of the solute needed = ?
Solution:
The mass of the solute can be derived using the expression below;
Mass = number of moles x molar mass
But,
Number of moles = Concentration x Volume
So;
Mass = Concentration x Volume x molar mas
Molar mass of CaCl₂ = 40 + 2(35.5) = 111g/mol
Mass = 0.75 x 0.5 x 111 = 41.63g
When halogens react with metals,they form salts called....
When halogens react with metals,they form salts called metal halides according to their electronic configuration according to which reaction takes place.
What is electronic configuration?Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.
Learn more about electronic configuration,here:
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What is the formula of iron(iii) oxide?
Answer:
Fe2O3
Explanation:
Answer:
Fe2O3
This is the chemical formula for iron(iii) oxide.
A beaker containing 6.32 moles of PBr3, contains___
molecules of PBrz.
A) 1712.7
B) 3.1 x 10^24
C) 3.8 x 10^24
D) 271
Answer:
3.8 x 10²⁴molecules
Explanation:
Given parameters:
Number of moles = 6.32moles
Unknown:
Number of molecules = ?
Solution:
The number of moles can be used to derive the number of molecules found within a substance.
Now,
1 mole of substance contains 6.02 x 10²³ molecules
6.32 mole of PBr₃ will contain 6.32 x 6.02 x 10²³ = 3.8 x 10²⁴molecules
Please answer correctly !!!!!!!!!!!!! Will mark brainliest !!!!!!!!!!!!!!!!!!!!
Answer:
AG
Explanation:
HOPE THIS HELPS
Please help with this I do not under stand
Answer:
See below:
Explanation:
The grasshopper doesn't require an exchange of gasses (air) using a circulatory system because the gasses directly reach its cell's from the "air sacs" which spread out into tiny tubes close to each cell.
Based on the context of paragraph 4, what are salient factors?
important factors
ignorable factors
interesting factors
intended factors
Answer:
importent factors
Explanation:
The salient facts about something or qualities of something are the most important things about them: She began to summarize the salient features/points of the proposal. The article presented the salient facts of the dispute clearly and concisely. SMART Vocabulary: related words and phrases. Very important or urgent.
Answer
The answer is a/important factors. Pls subscribe to Amiredagoat Yt in return.
Explanation:
Answer fast please What system are your lungs part of
A. Circulatory
B, Respiratory
C. Digestive
D. Skeletal
Answer:
B. Respiratory System
Answer:
B, Respiratory
Explanation:
Aluminum bromide and chlorine gas react to
form aluminum chloride and bromine gas.
Answer:
ok
Explanation:
which one of these elements is the lightest: 1- oxygen , 2- carbon , 3- nitrogen , 4- neon.
idk what neon is but that’s an answer so...
Question 1
You are making lemonade and the calls for 6 cups Lemon juice (L), 3 Cups of sugar (S) and 5 cups of water (W) to make 12 Cups of Lemonade (LA): your formula is:
6 L + 3 S + 5 W = 12 LA
You are given 9 cups of lemon juice (L), 8 cups of sugar (S) and unlimited water (W).
How many cups of lemonade can you make?
Question 1 options:
9 Cups of Lemonade
12 Cups of Lemonade
18 Cups of Lemonade
32 Cups of Lemonade
Question 2
You are making lemonade and the calls for 6 cups Lemon juice (L), 3 Cups of sugar (S) and 5 cups of water (W) to make 12 Cups of Lemonade (LA): your formula is:
6 L + 3 S + 5 W = 12 LA
You are given 9 cups of lemon juice (L), 8 cups of sugar (S) and unlimited water (W).
Which ingredient limits (runs out first) the amount of lemonade you can make?
Question 2 options:
Lemon Juice
Sugar
Water
Lemonade
Question 3
You are making lemonade and the calls for 6 cups Lemon juice (L), 3 Cups of sugar (S) and 5 cups of water (W) to make 12 Cups of Lemonade (LA): your formula is:
6 L + 3 S + 5 W = 12 LA
You are given 9 cups of lemon juice (L), 8 cups of sugar (S) and unlimited water (W).
How much of the other ingredient do you have in excess (more then you need)? (don’t include water since you have an unlimited amount)
Question 3 options:
4.5 cups of Sugar
3.5 cups of Sugar
3.5 cups of lemon juice
4.5 cups of lemon juice
Answer:
1.) 12 tablespoons of sugar and 3 cups of water (48 tablespoons)
2.) Amount of lemon juice, sugar and water required will be = 0.375 cups, 0.75 cups and 3 cups.
Step-by-step explanation:
Malanie is making lemonade and finds a recipe that requires lemon juice, sugar and water in the ratio of 1 : 2 : 8.
She juices 2 lemons to obtain 6 tablespoons of lemon juice.
∵ 16 tablespoons = 1 cup
∴ 1 tablespoon = cup
∴ 6 tablespoon = cup = 0.375 cups
Since ratio between lemon and sugar is 1 : 2
So amount of sugar required = 0.375×2 = 0.75 cups
Ratio between lemon and water is 1 : 8
So amount of water required = 0.375×8 = 3 cups
Therefore, amount of lemon juice, sugar and water required = 0.375 cups, 0.75 cups sugar and 3 cups respectively.
Explanation:
Answer:
18 cups.
Lemon Juice
I put 4.5 cups of sugar
I got 4/5 on this quiz and I don't remember which was wrong but there you go...
which of these substances will conduct electricity? CuSO4(s) CuSO4(aq) C5H12(l) CO2(g)
Answer:
CuSO4(aq)
Explanation:
The aqueous for of CuSO₄ is an electrolyte and it will conduct electricity.
CuSO₄ is an ionic substance and in solid state, it will not have the ability to conduct electricity.
In aqueous form, it will contain free mobile ions which serves as carriers of electric current. In the solid state, the ions are arranged into a crystal lattice and will not conduct a current of electricity. The remaining given compounds will not conduct electricity as they are non-polar and do not have free mobile electrons.What is the location of elements in the periodic table related to?
Answer:
.
Explanation:
An element's location in the periodic table is largely depending on its electrons. The number of valence shell electrons determines its group, and the type of orbital in which the valence electrons lie in determines the element's block. Sometimes during these groups there are more like the alkali metals the non metals and gases :)
PLS PLS PLS HELP PLS I REALLY NEED IT AND I WILL MARK YOU BRAINLYEST:((
PLSSSS
Answer:
D and A
Explanation:
D is a Mitochondria (the powerhouse of the cell)
A is a Choroplast (the part that takes in the sun)
According to Newton’s third law of motion, when a hammer strikes and exerts force on a nail, the nail
(a) creates a friction with the hammer.
(b) disappears into the wood.
(c) exerts an equal force back on the hammer.
(d) moves at a constant speed.
Answer:
C
Explanation:
When a hammer strikes and exerts force on a nail, the nail exerts an equal force back on the hammer. Option C. This is further explained below.
What is Newton’s third law of motion?Generally, According to Newton's third law, when two bodies contact, they apply forces to each other that are equal in magnitude and opposing in direction.
In conclusion, Newton’s third law of motion certifies that the nail exerts an equal force back on the hammer.
Read more about Force
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SA
Element Proton number Nucleon number
Х
13
27
Y
8
16
Table 2
Jacheal 2
Element X reacts with element Y to form
compound
What is the molar mass of the compound?
A 43 g mol
C 102 g mol
B 50 g mol
D 113 g mol
SA
31
Answer:
маликулярная масса ровна 23
Predict the products of the following reaction:
RbNO2 +BaCO3->
Answer:
2RbNO2 + BaCO3 → Rb2CO3 + Ba(NO2)2
Explanation:
The balanced reaction equation is shown below;
2RbNO2 + BaCO3 → Rb2CO3 + Ba(NO2)2
This reaction is possible because the reduction potential of Rb is -2.98V while that of Ba is –2.92 V. Hence Rb can displace Ba from its salt solution.
The equation is balanced since the number of atoms of each element on the left and right hand sides of the reaction equation are equal.
The products for the reaction of Rubidium nitrite and Barium carbonate has been Barium nitrite and Rubidium carbonate.
Rubidium nitrite has been the binary ionic compound found to be acidic in nature. While barium carbonate has been the basic salt with the potency to be poisonous to humans.
The reaction between an acid and a base has been the neutralization reaction with the formation of salt and water. The reaction between rubidium nitrite and barium carbonate will be:
[tex]\rm 2\;RbNO_2\;+\;BaCO_3\;\rightarrow\;Rb_2CO_3\;+\;Ba(NO_2)_2[/tex]
The reaction has been the displacement reaction with the tendency to displacement.
For more information about displacement reaction, refer to the link:
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Which of the following increases the concentration of OH- ions?
A: Acid
B: Base
C: Water
D: Salt
Answer:
Basee is the answer hope its write xd
Answer:
B: Base
Explanation:
An acid will increase the concentration of hydrogen (H+) ions in a solution, and a base would increase the concentration of hydroxide (OH–) ions in a solution. So, Base is the answer. :)
Using the model of the periodic table, which element pictured represents an unreactive gas?
Answer:
2
Explanation:
Nobel gasses are not reactive and are the far right group on the periodic table. This is because they have a full valence electron shell which is the most stable electron configuration. Most reactions occur in order for an atom to fill its valence shell and since they already have a full valence shell there is no reason for them to react.
What element is this atom?
(Urgent plz help)
Which element forms an ionic compound when it reacts with lithium?
1. K
2. Fe
3. Kr
4. Br
The total partial obscuring of the Sun or Moon by the Moon or the Earth's
shadow is an
Answer:
Eclipse
Explanation:
Identify the type of reaction: 2AgCl + BaBr2 -> 2AgBr + BaCl2
A) decomposition
B) combustion
C) double replacement
D) single replacement
Answer:
C
Explanation:
Just look at the reactants.
2AgCl + BaBr2
The first reactant is made of 2 elements.
The second reactant is made of 2 elements.
It can't be a decomposition. At this level there is only one reactant made of 2 elements. Something like
2MgO ===> 2Mg + O2
is a decomposition. One compound breaking down into 2 elements Mg and O.
It can't be a combustion. One of the reactants in a combustion is oxygen. Those equations look like
C3H8 + 5O2 ==> 3CO2 + 4H2O
That would be what a combustion looks like
It can't be a single replacement. They look like
Mg + CuO ===> Cu + MgO
There are elements on both sides of the reaction.
that leaves a double replacement which I wrote about how you distinguish it.
Answer:
c
Explanation:
Please help❤️
Explain what is meant by noble gas envy.
Answer:
a phrase that describes how elements what do be stable and non reactive like the noble gas elements are.
In a polar covalent bond, the more electronegative atom pulls electrons closer and gains a slightly _______ charge, while the less electronegative atom has a slightly _________ charge.
Answer:
In a polar covalent bond, the more electronegative atom pulls electrons closer and gains a slightly negative charge, while the less electronegative atom has a slightly positive charge.
Explanation:
The covalent bond is the chemical bond between two atoms where electrons are shared. This makes the atoms behave as a unit, which we call a molecule. Atoms interact with each other through the outermost electrons forming bonds.
In other words, the covalent bond is formed by sharing a pair of electrons between the two atoms, one coming from each atom. The shared pair of electrons is common to the two atoms and holds them together. So molecules are formed: small groups of atoms linked together by covalent bonds.
In covalent bonds a dipole forms. The atom with the highest electronegativity attracts electrons towards itself, forming a negative dipole around it since the electrons have a negative charge. In the atom with lower electronegativity, the dipole formed is positively charged, since it partially gives up its electrons.
This is, in a polar covalent bond, the more electronegative atom pulls electrons closer and gains a slightly negative charge, while the less electronegative atom has a slightly positive charge.
Can someone please help me, I’m taking a test
Answer:
Im pretty sure its none of these
Order the elements from smallest to largest atomic number
the largest is francium, Z=87 , or caesium, Z=55 ; and the smallest is definitely helium, Z=2 .
Explanation:
make me Brainliest
This particle has mass but no charge.
Answer:
Neutrons
Explanation:
let me know if it is right or not:)
true or false: Fungi are able to carry out photosynthesis, similar to plants
Answer:
false
Explanation:
Answer:
FALSE ...
Explanation:
However, unlike plants, fungi do not contain the green pigment chlorophyll and therefore are incapable of photosynthesis. That is, they cannot generate their own food — carbohydrates — by using energy from light. This makes them more like animals in terms of their food habits
Which two characteristics are associated with metals
Answer:
high electrical and thermal conductivity
Answer:
Metals donate electrons.
They are good conductors of heat and electricity.