Answer:
7.67
Explanation:
According to molar concentration, the molarity of solution which contains 22.41 grams of NaCl in 50.0 ml of solution is 7.67 M.
What is molar concentration?Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.
The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.
In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.Substitution of values in the given formula gives, molarity= 22.41/58.44×1/0.05=7.67 M.
Thus, the molarity of solution which contains 22.41 grams of NaCl in 50.0 ml of solution is 7.67 M.
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The chemical equation, Cr + Fe(NO3)2 → Fe + Cr(NO3)3, is an example of which type of reaction?
Answer:
Redox type
Explanation:
The reaction is:
2Cr + 3Fe(NO₃)₂ → 2Fe + 2Cr(NO₃)₃
2 moles of chromium can react to 3 moles of iron (II) nitrate in order to produce 2 moles of iron and 2 moles of chromium nitrate.
If we see oxidation state, we see that chromium changes from 0 to +3
Iron changed the oxidation state from +2 to 0
Remember that elements at ground state has 0, as oxidation state.
Iron is being reduced while chromium is oxidized. Then, the half reactions are:
Fe²⁺ + 2e⁻ ⇄ Fe (Reduction)
Cr ⇄ Cr³⁺ + 3e⁻ (Oxidation)
When an element is being reduced, while another is being oxidized, we are in prescence of a redox reaction.
An atom of an element always contains
Answer:
An atom of an element always contain three fundamental particles called electrons(e-) , neutron ( n zero) and protons ( p+)
An atom of an element always contains a proton, electron and neutron.
What is an atom ?Every atom is made up of a nucleus and one or more electrons that are attached to the nucleus. One or more protons and a number of neutrons make up the nucleus. Only the most common type of hydrogen is neutron-free. Every solid, liquid, gas, and plasma is made up of atoms that are either neutral or ionized.
But when it comes to the word atom, we must go back to 400 B.C. Greece. And Democritus, a brilliant philosopher, proposed the Greek word atomos, which means uncuttable.
Every atom is made up of a nucleus and one or more electrons that are attached to the nucleus. One or more protons and a number of neutrons make up the nucleus.
Thus, An atom of an element always contains a proton, electron and neutron.
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What’s is CO written?
Answer:
CO is a chemical formula that contains one carbon atom (C) and one atom of oxygen (O). Altogether, CO translates to "carbon monoxide."
Explanation: Why monoxide and not dioxide? Well, the prefix mono means "one," and di means "two." Since there is only one oxygen atom (-oxide), then it must be monoxide! Voila!!
Think of the of the body that we need in order to do things like walk, run etc. What systems are these? How do they work together so you can do these activities?
Answer:
I dont get this
Explanation:
Which of these forces does not act over a distance?
A. Friction
B. Electric
C. Magnetic
D. Gravitational
what is the meaning of flourish?
What is the percent composition of each element in the compound below:
CrPO4
Which is an example of a medicine that is made up of synthetic materials?
Fish Oil
Aspirin
Aloe Vera
Fresh water
Answer: Aspirin
Explanation:
Name 3 elements that are found in the human body
Answer:
oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus.
Explanation:
the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus.
An independent variable is
a.
directly changed by the experimenter.
b.
manipulated by changes to the dependent variable.
C.
a variable that is kept constant.
d.
a variable that is used as a control.
Answer:
a. directly changed by the experimenter.
Explanation:
In the case of mathematical modeling, analytical modeling , and experimental sciences, the number of dependent variables based upon the amount of independent variables.
The dependent variables represent the result or outcome whose changes is being determined.
An independent variable expressed in the name form like experimental or expected variable, is a variable i.e. created in an experiment in order to verify the effect on a dependent variable
Therefore the option a is correct
If I had 50 graham cracker squares, 15 marshmallows, and 100 little
chocolate pieces, how many total s'mores could I make before I ran out of
ingredients?
HELP PLEASE
What does the 2 mean in the formula of calcium nitrate? What does the 3
mean?
Answer:
Calcium nitrate is an inorganic compound with the chemical formula Ca(NO3)2. ... It is a nitrate salt of Calcium which contains calcium and nitrogen and oxygen. Calcium nitrate is a white or whitish-grey coloured granular solid which absorbs moisture from the air and is usually found as a tetrahydrate compound Ca(NO3)2.
Explanation:
If combining cation A with a +3 charge and anion X with a -3 charge, how would we write the compound?
O AX
O A3X3
O 3AX
Answer: it’s not A3X3
Explanation:
1. AX
For binary ionic compounds (ionic compounds that contain only two types of elements), the compounds are named by writing the name of the cation first followed by the name of the anion.If a cation A carries +3 charge and an anion X carries -3 charge, the compound so formed is AX. Since the charges gets cancelled out.For example: consider aluminum phosphate, aluminum carries +3 charge and phosphate carries -3 charge, the molecular formula for the compound will be AlPO₄.Learn more:
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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]
what does 3 hour change mean?
Answer:
like what happens In 3 hours
How many moles of carbon dioxide are produced when 5.12 moles of glucose undergoes a combustion reaction?
Answer: 30.72 moles of [tex]CO_2[/tex] will be produced from 5.12 moles of glucose.
Explanation:
The balanced chemical equation for combustion of glucose is:
[tex]C_6H_{12}O_6+6O_2\rightarrow 6CO_2+6H_2O[/tex]
According to stoichiometry :
1 moles of glucose produce = 6 moles of [tex]CO_2[/tex]
Thus 5.12 moles of glucose produce =[tex]\frac{6}{1}\times 5.12=30.72moles[/tex] of [tex]CO_2[/tex]
Thus 30.72 moles of [tex]CO_2[/tex] will be produced from 5.12 moles of glucose.
Which date has the longest daylight and the shortest darkness
The Winter Solstice.
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Give the products of this neutralisation reaction: Sulfuric acid + magnesium hydroxide
Magnesium combined with sulfuric acid produces magnesium sulfate and hydrogen gas.
what phase of matter changes volume when moved from one container to another ?
Answer:
gas
Explanation:
Gas
Explanation:
The volume of gas varies inversely with the pressure, when temperature is kept constant.
If the amount of gas in a container is increased, the volume increases. If the amount of gas in a container is decreased, the volume decreases.
Can you bond 2 silicon atoms (Si) together to form a complete (real) molecule? Explain your reasoning
Answer: no
Explanation: because silicon cannot share over 3 bonds
the indicated gene codes for a protein made up of the amino acid
Answer:
N/A
Explanation:
Is this a true or false answer or.....?
A balloon occupies 175 cm at 25.0 C. What volume will it occupy at 42.5 °C?
175 cm³ instead of 175 cm.
Answer:
297.5 cm³
Explanation:
From the question;
Initial volume; V1 = 175 cm³
Initial temperature; T1 = 25°C
Final temperature; T2 = 42.5°C
From Charles law we can find the volume V2 from the equation;
V1/T1 = V2/T2
Making V2 the subject gives;
V2 = V1 × T2/T1
V2 = (175 × 42.5)/25
V2 = 297.5 cm³
1 point
When substances that make up baking powder are mixed with water,
carbon dioxide gas is formed. This is an example of *
a nuclear reaction
a physical reaction
a change of state
a chemical reaction
Please help me with dis
Answer:
c
Explanation:
Can you help me plz I think it’s b or c
i think its C pls dont get mad if it is wrong
Carbon is one of a few elements that bonds to itself. The scientific term for this is
Answer:
Alkanes
Explanation:
Explanation:
The answer is Alkanes.Alkanes are compound that consists entirely of atoms of carbon and hydrogen joined to one another by single bonds
PLEASE HELP MEEE THIS IS FOR a gradE AND IF I FAIL I FaIL THIS CLASs HELP ME
Answer:
stream
Explanation:
because a stream goes into a lake
Answer:
D) Stream
Explanation:
please help! Will give Brainliest!
Answer: the answer is c
Explanation:
also, is that canvas? sajdasds
PLZ HELP WILL BRAINLIEST
Balance the following equation: Fe2(SO4)3 + KOH --> K2SO4 + Fe(OH)3
Write the coefficients that you decide to balance the equation like this 3, 4, 3. If you do not add a coefficient in front of an element or compound, use a 1 in your answer. For instance the for this balanced equation: 2H2 + O2 --> 2H2O you would write your answer: 2, 1, 2
Answer:
6,3,2
Explanation:
Fe2(SO4)3 + 6 KOH = 3 K2SO4 + 2 Fe(OH)3
3) Find the mass, in grams, of 5.08 mol Ca(NO3)2
Answer:
833.12g
Explanation:
Use the mole=mass/mr equation (rearrange this to find mass)
Mr= 164
So, 5.08 x 164 = 833.12g
The mass in grams of 5.08 mol Ca(NO3)2 is =833.12g
What is a mole?
The mole is the amount of substance of a gadget which includes as many standard entities as there are atoms in zero.012 kilogram of carbon 12;
Molecular mass of Ca(NO3)2 = 40+(14+48)*2
=40+124
= 164 g
1 mole of Ca(NO3)2 = 164 g
5.08 mole of = 5.08*164g
=833.12g
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