I can distunguish between elements, compounds and mixtures.
3.1 I can describe what elements anre and give examples of them.
3.2 I can describe what mixtures are and give examples of them.
3.3 I can describe what compounds are and give examples of them.
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This picture represents..
O a compound
O an element
O a mixture of elements
O a mixture of compounds
Answers
Answer:
an element
Explanation:
that is the answer yep
it represent an element
Related Questions
gas which dissolve in ammonia copper(ii) chloride but insoluble in water is
Answers
Answer:
carbon monoxide
Explanation:
yes this is the answer
Carbon mono-oxide is the gas which dissolve in ammonia copper(ii) chloride but insoluble in water.
What is carbon mono-oxide?Carbon monoxide (CO) is just a toxic gas that is colorless and odorless. It is created when various fuels, such as coal, wood, charcoal, oil, kerosene, propane, as well as natural gas, are burned incompletely.
What is gas?
One of the four basic states of matter is gas. Individual atoms, elemental molecules created from one type of atom can make up a pure gas.
Therefore, carbon mono-oxide is the gas which dissolve in ammonia copper(ii) chloride but insoluble in water.
To know more about gas and carbon mono-oxide.
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I need 100 ml of a 20 uM solution of a protein with a molecular weight of 50,000. How much protein do I need
Answers
I need 0.1g of protein
HOW TO CALCULATE NUMBER OF MOLES?
The number of moles of a substance in a solution can be calculated by multiplying the volume by the molarity of the solution i.e.no of moles (n) = Molarity (M) × Volume (V)
In this question, 100 ml of a 20 uM solution of a protein was given.
Since 1uM = 10^-6M
20uM = 20 × 10-⁶
= 2 × 10-⁵M
1L = 1000ml
100mL = 100/1000
= 0.1L
no of moles = 2 × 10-⁵M × 0.1L
no of moles = 2 × 10-⁶mol
HOW TO CALCULATE MASS:
Mass of a substance can be calculated by multiplying the molar mass and the number of moles i.e.Mass = moles × Molar mass
Molecular mass of protein = 50,000g/mol
Mass = 2 × 10-⁶mol × 50000g/mol
Mass = 0.1g
Therefore, 0.1gram of protein is needed
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Molarity of a solution is simply defined as the mole of solute per unit litre of water.
Mathematically, it is expressed as:
[tex]Molaity = \frac{Mole }{Volume }[/tex]
With the above information in mind, we can determine the amount of the protein needed as follow:
Step 1:Data obtained from the question
Volume = 100 mL
Molarity = 20 μM = 20×10¯⁶ M
Molecular weight of protein = 50000 g/mol
Mass of protein=?Step 2Conversion of 100 mL to litre (L).
1000 mL = 1 L
Therefore,
[tex]100 mL = \frac{100 mL * 1 L}{100 mL }\\\\100 mL = 0.1 L[/tex]
Step 3Determination of the mole of the protein
Volume = 0.1 L
Molarity = 20×10¯⁶ M
Mole of protein =?Mole = Molarity × Volume
Mole of protein = 20×10¯⁶ × 0.1
Mole of protein = 2×10¯⁶ mole Step 4Determination of the mass of the protein
Mole of protein = 2×10¯⁶ mole
Molecular weight of protein = 50000 g/mol
Mass of protein =?Mass = mole × molar mass
Mass of protein = 2×10¯⁶ × 50000
Mass of protein = 0.1 gTherefore, the amount of the protein needed is 0.1 g
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What is the safe way to dispose of an acidic solution
Answers
I'd say by Neutralization so as to make it Harmless.
Or
You Over dilute it with Water
Note: You pour the acid into water...Not water into acid as it may spill and burn your skin.
Answer: D
Explanation:
Bio-Clemical reactions talking Place in every Cell organelles
Answers
Answer:
Each of these organelles performs a specific function critical to the cell's survival. For example, biochemical reactions in a cell's mitochondria transfer energy from fatty acids and pyruvate molecules into an energy-rich molecule called adenosine triphosphate (ATP).
Explanation:
Please help thank you (15 points)
Answers
Answer:
Jupiter.
Explanation:
Jupiter has the fastest axial rotation time (day) in the list of answers, based on the fact that its day is only 10 hours long.
a. Phenol (C6H5OH) is an aromatic compound and a colourless liquid widely used in household products
and medicine. When it reacts with chlorine liquid (chlorine is a diatomic molecule), in the presence of a
catalyst, one of the aromatic hydrogen atoms attached directly to a C atom is replaced with a chlorine
atom, and liquid chlorophenol is formed. This replacement process is called chlorination
Write a balanced chemical equation for the chlorination reaction and explain how you balanced it. Note
that hydrogen chloride gas (HCI) is also a product of this chemical reaction and you should ignore the
presence of the catalyst in the equation.
Answers
Because there are 2 Cl on the left, we will put a coefficient 2in front of HCl on the right side to balance out the Cl. This would result in an unequal amount of H, with 6 on the right side and 7 in the left, so we have to put a coefficient of 2 in front of C6H5OH and C6H4OH on both sides to balance out the H. By doing this, we would obtain an equal amount of H on both sides. The Carbon is already balanced, and so is the Oxygen.
The balanced chemical reaction equation for the reaction between aromatic phenol and chlorine gas in the presence of FeCl3 as catalyst is as follows;
C6H6O + Cl2 -------> C6H5OCl + HCl
An aromatic compound has 4n + 2 number of pi electrons. This condition is satisfied by phenol. Hence, phenol has the stability associated with aromatic compounds.
The reaction of phenol with chlorine in the presence of a catalyst such as FeCl3 is an aromatic electrophillic substitution reaction.
This reaction yields a chlorinated phenol (one of the aromatic hydrogen atoms attached directly to a C atom is replaced with a chlorine atom and chlorophenol is formed).
A balanced chemical reaction equation is one in which the number of atoms of each element at the reactant side and the product side are equal. This condition is satisfied for the reaction;
C6H6O + Cl2 -------> C6H5OCl + HCl
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A block of wood has a length of 14 cm, a width of 12 cm and a height of 17 cm. What is it’s volume? If it’s density is 8.16 g cm^3 what is its mass?
Answers
Answer: volume = 2856
Mass = 6.410496 × 10-5 m3 kg
Explanation:
Please please help with #19 part a., b., and c.!! it’s due on monday and i am not terribly good at chemistry. if you could also give an elementary explanation that would be great too!
Answers
A. 0.2 mole of HCl is needed for the reaction
B. The molarity of NaOH solution is 0.04 M
C. The molarity of HCl is 0.043 M
Molarity is defined as the mole of solute per unit litre of the solution.
Molarity = mole / Volume A. Determination of the mole of HCl.We'll begin by calculating the number of mole of NaOH in the solution.
Volume = 0.1 L
Molarity of NaOH = 2 M
Mole of NaOH =?Mole = Molarity x Volume
Mole of NaOH = 2 × 0.1
Mole of NaOH = 0.2 moleFinally, we shall determine mole of HCl.
HCl + NaOH —> NaCl + H₂O
From the balanced equation above,
1 mole of NaOH required 1 mole of HCl.
Therefore, 0.2 mole of NaOH will also require 0.2 mole of HCl.
Thus, 0.2 mole of HCl is needed for the reaction.
B. Determination of the molarity of NaOH.HCl + NaOH —> NaCl + H₂O
From the balanced equation,
Mole ratio of the acid, HCl (nA) = 1
Mole ratio of the base, NaOH (nB) = 1
From the question given above above,
Volume of acid, HCl (Va) = 0.025 L
Molarity of acid, HCl (Ma) = 0.05 M
Volume of base, NaOH (Vb) = 0.034 L
Molarity of base, NaOH (Mb) =?Mava / mbvb = na/nb
0.05 x 0.025 / Mb x 0.034 = 1
0.00125 / Mb x 0.034 = 1
Cross multiply
Mb x 0.034 = 0.00125
Divide both side by 0.034
Mb = 0.00125 / 0.034
Mb = 0.04 M
Therefore, the molarity of NaOH is 0.04 M
C. Determination of the molarity of the HClFrom the question given above above,
Volume of base, NaOH (Vb) = 0.054 L
Molarity of base, NaOH (Mb) = 0.1 M
Volume of acid, HCl (Va) = 0.125 L
Mole ratio of the acid, HCl (nA) = 1
Mole ratio of the base, NaOH (nB) = 1
Molarity of acid, HCl (Ma) =?Mava / mbvb = na/nb
Ma x 0.125 / 0.1 x 0.054 = 1
Ma x 0.125 / 0.0054 = 1
Cross multiply
Ma × 0.125 = 0.0054
Divide both side by 0.125
Ma = 0.0054/0.125
Ma = 0.043 MTherefore, the molarity of the HCl is 0.043 M
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The products of the hydrolysis of cyclohexene
Answers
Answer:
CH3
Explanation:
Answer:
cyclohexene
One molecule of cyclohexanol should produce one molecule of cyclohexene. One mole (mol) of cyclohexanol should produce one mole of cyclohexene.
Explanation:
The major products of the complete hydrolysis of disaccharides and polysaccharides are three monosaccharide units: glucose, fructose, and galactose.
Will give brainliest
Answers
Answer:
D
Explanation:
hi
good morning
I hope right answer
solve for x . 4x-300=-8×
Answers
Answer:
4x+8x=30
12x=300
x=300/12
x=25
HELP PLEASE WILL MARK BRAINLIEST!!!!!!!
Answers
Answer:
Precise
Explanation:
hope it helps!!!!!!!!
Which of the following salts are more soluble in acidic solution than in pure water?
(A) Al(OH)3,
(B) BaF2,
(C) PbCl2,
(D) Hg2Br2,
(E) NiS,
(F) AgI
Answers
A) Al(OH)3 is the hydroxide of a metal and this is basic. hence this will dissolve better in acid than pure water ( in fact Al(OH)3 is amphoteric meaning it can dissolve in both acid and base)
B) BaF2 is the salt of a strong base Ba(OH)2 and weak acid HF, hence the nature of BaF2 is slightly basic, this will dissolve better in acidic solution
C) PbCl2 is the salt of weak base Pb(OH)2 and strong acid HCl, hence the nature of PbCl2 is slightly acidic, it won’t be more soluble in acidic solution
D) Hg2Br2 is the salt of weak base Hg2(OH)2 and strong acid HBr. the nature of Hg2Br2 is acidic hence, it wont dissolve better in acidic solution
E) NiS is the salt of a very weak base Ni(OH)2 hence this NiS will be acidic in nature nd wont dissolve in acidic solution
F) AgI is the salt of a very strong acid HI and weak base AgOH. nature will be acidic and wont dissolve in acidic solution
in conclusion only Al(OH)3 and BaF2 are more soluble in acidic solution than in pure water as both are slightly basic
The salts which are more soluble in acidic solution than in pure water are Al(OH)₃, BaF₂, PbCl₂ and Hg₂Br₂.
Which compounds will easily dissolve in acids?Those compounds which are basic in nature will easily dissolve in the acidic solution as compare to the pure water.
Al(OH)₃ is basic in nature due to the presence of hydroxide ions in it, so it gets easily soluble in the acidic solution.BaF₂ is also basic in nature as it is a salt of strong base, so it gets easily soluble in the acidic solution.PbCl₂ is moderate basic in nature as it is a salt of weak base and strong acid, so it is not easily soluble in the acidic solution.Hg₂Br₂ is also slightly basic in nature as it is a salt of weak base and strong acid, so it is not easily soluble in the acidic solution.NiS is not soluble in acidic solution because it shows acidic behavior as it a salt of very weak base.AgI is also not soluble in acidic solution because it shows acidic behavior as it a salt of strong acid.Hence Al(OH)₃, BaF₂, PbCl₂ and Hg₂Br₂ will soluble in acidic solution.
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How many elements have properties of both metals and non-metals?
Answers
Answer:
The elements boron, silicon, germanium, arsenic, antimony, and tellurium separate the metals from the nonmetals in the periodic table. These elements, called metalloids or sometimes semimetals, exhibit properties characteristic of both metals and nonmetals.
Elements: Oxygen
a test tube containing liquid x is placed in a beamer of boiling water. the liquid starts to boil immediately. what is the boiling point of liquid x?
a) 100 celsius
b) above 100
c) between 0 and room temperature
d) between room temperature and 100 celsius
Answers
Answer:
100 Celsius
Explanation:
(I'm not sure if this is right but I'm confident this is the answer)
25 mL of 0.010 M I- solution is mixed with another solution to give a new total volume of 60 mL. What is the molarity of I- after mixing
Answers
Answer:
the answer of this question is 0.0041M
Carbohydrates make up 75% of the mass of dried plant material. Cotton is at least 95% carbohydrate. Why do humans not include cotton in their diet?
Answers
Answer:
the carbohydrates in cotton are mainly cellulose, but our body does not possess the proper enzymes to process cellulose, no we don't eat cotton on in our daily diet.
The specific gravity of a vegetable oil is 0.92. What is the massgrams, of 330 mL of vegetable oil?
Answers
Answer:
HOPE THIS ANSWER WILL HELP YOU
15. Which portion of a molecule of F20 has partial positive charge?
A. The central O atom
ОО
B. The partial charge on each atom is negative
C. The partial charge on each atom is zero
D. The F atoms
Answers
Answer:
the right answer is option A
Answer:
a.the central o atom oo
Explanation:
wala lang
Carbon dioxide gas is obtained from the fermentation of glucose. If 20.0 L of carbon
dioxide (at s.t.p) are collected, calculate the number of oxygen atoms present in this gas.
Answers
Answer:
5.48 x 10´23 atoms
Explanation:
Use PV = nRT
V = 20 L
R= constant = 0,08205746 L atm / (K mol)
stp means stantdard temperature and pression
T = 273 K
P = 0.987 atm
n = PV/RT = (0.987 atm) x (20 L) = 0.88 moles
(0,082 Latm/(K mol)x 273 K
0.88 moles x [tex]6.22 x 10^{23}[/tex] molecules = 5.48 x 10´23 atoms
7. In the experiment discussed in the passage, what is the variable?
Answers
Answer:
A variable is anything that can change or be changed. In other words, it is any factor that can be manipulated, controlled for, or measured in an experiment.
1. Based on the two video clips on titration from the links provided earlier on the watsApp Group and a study master, carry out the following tests , a define the forms(i) titrant (2) Strand or analyte (3) Indicator (4) end point (5) titration. b. write in point form (list), the steps inolved in titration (including the relevant apparatus used) - write a typed Laboratory report for this assignment where there is no data to put in, include the relevant headings but without data. (For those who can attempt to do some calculations based the presentations, you are encouraged The report should be handed in when you open back to college
Answers
Answer:
1. Based on the two video clips on titration from the links provided earlier on the watsApp Group and a study master, carry out the following tests , a define the forms(i) titrant (2) Strand or analyte (3) Indicator (4) end point (5) titration. b. write in point form (list), the steps inolved in titration (including the relevant apparatus used) - write a typed Laboratory report for this assignment where there is no data to put in, include the relevant headings but without data. (For those who can attempt to do some calculations based the presentations, you are encouraged The report should be handed in when you open back to college
Explanation:
the answer is end point
Assuming equimolar quantities of reactants, which compound will react to the greatest extent with boron trifluoride (BF3) in a Lewis acid-base reaction
Answers
NH3 is an example of a Lewis Base that will react extensively with BF3 to form the compound BF3NH3
To solve such this we must know the concept of acid-base reaction. Therefore, NH[tex]_3[/tex] is the compound that will react to the greatest extent with boron trifluoride (BF[tex]_3[/tex]) in a Lewis acid-base reaction.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
NH[tex]_3[/tex] is an example of a Lewis Base that will react extensively with BF[tex]_3[/tex] to form the compound NH[tex]_3[/tex] + BF[tex]_3[/tex] → [B (NH[tex]_3[/tex])F[tex]_3[/tex]].
Therefore, NH[tex]_3[/tex] is the compound that will react to the greatest extent with boron trifluoride (BF[tex]_3[/tex]) in a Lewis acid-base reaction.
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Students in Mr. Brant's class designed an experiment to test which baseball bat will hit the ball the longest distance? In this experiment what is the test variable?
A . The distance the ball traveled
B. The students in the class
C. The type of baseball bat
D. A baseball helmet
Answers
How did you figure out the mass of each atom?
Answers
Answer:
Yeah, if you have the atomic number and neutron number
[tex]mass = protons + neutrons[/tex]
protons is the atomic number
what is x if x - 2 =0
Answers
Answer:
x-2 = 0
x = 2
hope this was help full
Why does the temperature stop rising while ice melts into water?
A. Because no more heat is being added to the system.
B. The temperature does not stop rising.
C. The electrons are increasing in energy levels.
D. The energy is being absorbed to separate the particles
Answers
Because no more heat is being added to the system
Name
maddison, M
Date
Vocabulary
Write the word next to the description it matches.
mixture
solubility
solution
1.
2.
the degree to which a material will dissolve in another
substance
different materials placed together but keeping their own
properties
a mixture in which substances are spread out evenly and
will not settle
3.
Okay
Answers
Answer:
solubility- the degree to which a material will dissolve in another substance
mixture- different materials placed together but keeping their own properties
solution- a mixture in which substances are spread out evenly and will not settle
Of the four symbolic representations of different matter below, identify which best represents a single element.
Answers
Que sucede cuando a una molécula sencilla se le sustituye un hidrógeno por un grupo oh
Answers
Answer: What happens when a single molecule is replaced by a hydrogen by an oh group
Explanation: