Answer:
34.0
Explanation:
Answer:
34.0g will be the amount that will dissolve in 200g of water at 70°C.
To prepare for a laboratory?
Answer:
You have to prepare for the lab (Materials, work, paper etc.)
Set up the lab know where the lab will be taking place
Read thru the experiment before doing the lab
Make a hypothesis
Write down notes, observations, measures anything important to help with the lab!
reativity of alkali metals increases down the group while reativity decreases down the group in helogens
Complete question is;
Chemical reactivity of alkali metals increases down the group while reactivity of halogens decreases down the group. Give reasons
Answer:
Explained below
Explanation:
Alkali metals exhibit reactivity due to their electropositivity. Now, for alkalis, their electro-positivity increases down their group. Since their reactivity increases with increase in electropositivity, it means their reactivity also increases down the group.
Whereas, the reactivity of halogens occurs as a result of their electronegativity. Now, electronegativity for halogens decreases down the group. Since their reactivity decreases with decrease in electronegativity, it means that their reactivity will also decrease down the group.
how did Simard conduct her experiments
Answer:
Simard planted paper birch, fir, and cedar trees in a plot and then injected them with different radioactive isotope carbon dioxide gases and covered them with bags. She waited an hour, then checked the trees for radiation.
Your family as an old apple tree in your backyard Your mom loves using the tree's apples to make pies. You don't care for apples ,but you enjoy reading under the tree's shade Which phrase bost describes the ecosystem services that the tree provides for you and your mom?
only and aesthetic services and direct services
only indirect services
indirect and direct services
Only ethical and aesthetic services
Answer:
ethical and aesthetic services and direct services
Explanation:
I just took the test and it's NOT indirect services and direct services like the other person said. It's ethical and aesthetic services and direct services.
Identify whether each of the following pairs of compounds are enantiomers or diastereomers: they are diastereomers they are enantiomers they are neither enantiomers nor diastereomers they are enantiomers they are diastereomers they are neither enantiomers nor diastereomers they are neither enantiomers nor diastereomers they are diastereomers they are enantiomers they are enantiomers they are diastereomers they are neither enantiomers nor diastereomers they are enantiomers they are diastereomers they are neither enantiomers nor diastereomers they are enantiomers they are diastereomers they are neither enantiom
Hello. You did not show the pairs of compounds to which the question refers, which makes it impossible for them to be classified as enantiomers or diastereomers. However, I will try to help you in the best possible way.
To find out if the compounds are enantiomers or diastereomers, you must evaluate their structure in relation to each other. This is because enantiomers, will be the pairs of compounds that have very similar structures, reaching the point of looking like mirrored structures of each other, but they cannot overlap. On the other hand, diastereomers are neither able to overlap, nor have such similar structures.
Hydrocarbons (not to be confused with carbohydrates) are molecules containing only carbon and hydrogen atoms. Examples include methane (CH4) and benzene (C6H6). How many hydrogen atoms are present in a linear hydrocarbon chain of nine carbons joined to each other by single covalent bonds? Hint: remember you need to satisfy the octet rule for each carbon.
Answer:
20 hydrogen atoms
Explanation:
Let us carefully observe the words of the question. We were told that the compound is a hydrocarbon. This implies that it is composed of only hydrogen and carbon.
Secondly, we are informed that the compounds is composed of only C-C single covalent bonds. This means that the compound is an alkane.
Then we are told that it contains nine carbon atoms and is a linear molecule. Hence, the compound must be n-nonane.
Recall that for alkanes, the general molecular formula is CnH2n+2 Substituting n=9 for nonane we have; C9H(2*9)+2 which is C9H20.
Thus there are 20 hydrogen atoms. The structure of the compound is attached to this answer
I never see anyone with this question
Answer:
i cant see the pic
Explanation:
no hablo ingles jajajajjajajajajabbbbbhuuuuuuu
The rate constant for a particular zero-order reaction is 0.075 M s-1. If the initial concentration of reactant is 0.537 M it takes ________ s for the concentration to decrease to 0.100 M.
Answer:
It takes 5.83s to decrease the concentration of the reactant from 0.537M to 0.100M
Explanation:
A zero-order reaction follows the equation:
[A] = [A]₀ - kt
Where [A] is actual reaction of the reactant = 0.100M
[A]₀ the initial concentration = 0.537M
k is rate constant = 0.075Ms⁻¹
And t is time it takes:
0.100M = 0.537M -0.075Ms⁻¹t
-0.437M = -0.075Ms⁻¹t
5.83s = t
It takes 5.83s to decrease the concentration of the reactant from 0.537M to 0.100M
2Na + Cl2 → 2NaCI
How many grams of NaCl will be produced from 33.0 g of Na and 34.0 g of Cl.?
Answer:
56.0 grams NaCl
Explanation:
First, determine the limiting reactant by converting either one of the reactants' available quantities into the other reactant using the balanced equation. I picked 33.0 g Na:
33.0 g Na x 1 mol Na/22.99 g Na = 1.435 mol Na
1.435 mol Na x 1 mol Cl2/2 mol Na = 0.718 mol Cl2
0.718 mol Cl2 x 70.906 g Cl2/1 mol Cl2 = 50.89 g Cl2
As we can see, we only have 34.0 g of Cl2 to react with, though 33.0 g of Na can react with 50.89 g of Cl2. This means that Cl2 is our limiting reactant.
Now we can work off of the limiting reactant and stoichiometrically determine the grams of NaCl produced:
34.0 g Cl2 x 1 mol Cl2/70.906 g Cl2 = 0.4795 mol Cl2
0.4795 mol Cl2 x 2 mol NaCl/1 mol Cl2 = 0.9590 mol NaCl
0.9590 mol NaCl x 58.44 g NaCl/1 mol NaCl = 56.04 g NaCl
Round 56.04 g NaCl to three significant figures -> 56.0 g NaCl
The amount 56 gram of NaCl will be produced from 33.0 g of Na and 34.0 g of Cl.
What is gram?The gram is defined as the mass of one cubic centimeter of pure water at 4 degrees Celsius
Calculation of amount of NaCl.
The given reaction is 2Na + Cl2 → 2NaCI.
Mass of Na = 33 gram
Mass of Cl = 34.0 gram
Conversion of gram into mol.
33 gram Na × 1 mole Cl2 / 22.99 g Na = 1.435 mol Na.
1.435 mol Cl2 × 70.906 gram Cl2 mol Na = 0.718 mol Cl2
0.718 mol Cl2 × 70.906 gram Cl 2 = 50.89 Cl2.
It can be seen that here, Cl2 is a limiting reagent.
Calculation of NaCl in gram
34 gram of Cl2 × 1 mol Cl2/ 70.906 g Cl2 = 0.4795 mol Cl2.
0.4795 mol Cl2 × 2 mol NaCl / 1 mol Cl2 = 0.9590 mol NaCl
0.9590 mol NaCl × 58.44 gram NaCl / 1 mol NaCl = 56 gram NaCl.
Therefore, the 56 gram of NaCl will be produced from 33.0 gram of Na and 34.0 gram of Cl.
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Briefly explain why the atoms of Carbon and Nitrogen have the same mass of 14
Answer:
Explanation:
Atoms of an element with the same mass number make up an isotope of the element. Different isotopes of the same element cannot have the same mass number, but isotopes of different elements often do have the same mass number, e.g., carbon-14 (6 protons and 8 neutrons) and nitrogen-14 (7 protons and 7 neutrons).
Answer: NO I know sorry
Complete and balance the following reaction
hydrobromic acid plus aluminum hydroxide
Answer:
3 HBr + Al(OH)₃ ⇒ AlBr₃ + 3 H₂O
Explanation:
Let's consider the unbalanced equation for the reaction that takes place when hydrobromic acid reacts with aluminum hydroxide. This is a neutralization reaction, in which an acid reacts with a base to produce a salt and water.
HBr + Al(OH)₃ ⇒ AlBr₃ + H₂O
First, we will balance Br atoms by multiplying HBr by 3.
3 HBr + Al(OH)₃ ⇒ AlBr₃ + H₂O
Finally, we get the balanced equation by multiplying H₂O by 3.
3 HBr + Al(OH)₃ ⇒ AlBr₃ + 3 H₂O
read carefully and do this questions all part all questions if someone do this questions I will make you brainly and give you thanks.
Answer:
Question 1.
a. the product of the reaction above that contains calcium is calcium chloride, CaCl₂.
b. the reactant, hydrochloric acid, HCl contains hydrogen
c. the product water, H₂O contains hydrogen
d. the reactant, calcium carbonate, CaCO₃ contains carbon
e. The product carbon (iv) oxide contains carbon
Question 2:
a. atoms of hydrogen and oxygen bonded together as a single compound known as water molecules are present at the start of the reaction
b. two molecules of water are present at the start of the reaction
c. two individual atoms of hydrogen and oxygen existing as molecules are present at the end of the reaction.
d. at the end of the reaction, two molecules of hydrogen and one molecule of oxygen are present.
Question 3:
a. total mass of products = 187 g
b. if Chinua starts with 10 g of magnesium, the same 10 g of magnesium will be found in the magnesium sulfate
Explanation:
Question 1: The equation of the reaction between calcium carbonate and hydrochloric acid is given as follows: + 2HCl ---> CaCl₂ + H₂O + CO₂
a. the product of the reaction above that contains calcium is calcium chloride, CaCl₂.
b. the reactant, hydrochloric acid, HCl contains hydrogen
c. the product water, H₂O contains hydrogen
d. the reactant, calcium carbonate, CaCO₃ contains carbon
e. The product carbon (iv) oxide contains carbon
Question 2: the equation of the reaction in which water is broken down to hydrogen and oxygen is as follows: 2H₂O ----> 2H₂ + O₂
a. atoms of hydrogen and oxygen bonded together as a single compound known as water molecules are present at the start of the reaction
b. two molecules of water are present at the start of the reaction
c. two individual atoms of hydrogen and oxygen existing as molecules are present at the end of the reaction.
d. at the end of the reaction, two molecules of hydrogen and one molecule of oxygen are present.
Question 3: The equation of the reaction between magnesium and sulfuric acid is given as follows: Mg + H₂SO₄ ---> MgSO₄ + H₂
molar mass of Mg = 24.0 g; molar mass of H₂SO₄ = 98.0 g
a. when 37.0 g of magnesium is reacted with 150 g of H₂SO₄, the total mass of products of the reaction is equal to the total mass of the reactants according to the law of conservation of mass.
Total mass of products = 150 + 37 = 187 g
b. if Chinua starts with 10 g of magnesium, the same 10 g of magnesium will be found in the magnesium sulfate
10.7g of C2H2 --> g CO2
1. List down the steps to determine the grams (g) of CO2 produced from the reaction of 10.7g of C2H2.
Describe the steps in complete sentences
Answer:
http://www.khalidshadid.com/uploads/3/9/2/0/3920808/raymond_chang-chemistry_10th_edition.pdf
Explanation:
http://www.khalidshadid.com/uploads/3/9/2/0/3920808/raymond_chang-chemistry_10th_edition.pdf
3. What is the meaning of coordination number?
Answer:
Explanation:
Its simple
This is the number of atoms, ions, or molecules that a central atom or ion holds as its nearest neighbours in a complex or coordination compound or in a crystal.
for example: Sodium chloride (NaCl) or table salt is an ionic compound. It means that each cation will have exactly one anion associated with it, which means the cation Na+ and the anion Cl− have the same number of coordinates.
It may be really confusing at first
I recommend you go online and watch tutorial videos on the topic
If 1.23 g of chlorine gas dissolves in
0.95 L of water at 15.6 psi, at what
pressure (in psi) would you be able
to dissolve 1.89 g in the same
amount of water?
Answer:
24 PSI
Explanation:
The concept Henry's law is used here to determine the pressure at which 1.89 g of chlorine gas is dissolved in the same amount of water. The pressure is 24.0 psi.
What is Henry's law?Henry's law states that at constant temperature the solubility of a gas in a liquid is directly proportional to the pressure of the gas in equilibrium with the solution. The solubility of a gas in a particular solvent is mainly expressed in terms of Henry's law.
The equation of Henry's law is given as:
c = KH . p
Here c is the solubility of the gas, p is the partial pressure and KH is the Henry's constant.
Here only the amount of chlorine gas to dissolve changes. For two different grams of chlorine gas, the equation is:
c ₁ /p ₁ = c ₂ / p ₂
1.23 / 15.6 = 1.89 / P₂
P₂ = 24.0 psi
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which of these salts is more soluble? sodium chloride or calcium carbonate?
Answer:
Sodium Carbonate is more soluble.
Explanation:
chlorine take longer to dissolve
Answer:
Sodium Chloride
Explanation:
Sodium Chloride is salt and we can tell that salt is more soluble than calcium chloride as it is used for making cast for fractures
1. Huntington’s disease is a dominant allele (not sex linked) that usually does not manifest itself until after age thirty- five. Individual who have the disease are almost always heterozygous. As a genetics counselor, you are visited by a 23-year-old woman. Her mother has Huntigton’s, but her father is normal. Use alphabets when required.
a. What is the genotype of the mother?
b. What is the genotype of the father?
c. What is the probability that this woman will develop Huntington’s disease as she grows older ?
WHO KNOWS HOW TO DO THIS
Answer:
a the mother is heterozygous so Aa
b would be aa
c. 50% as she could either get the dominant allele from her mother or not it is a coin flip
Explanation:for c the best way to do that one is to draw a punnitt square
In which type of reaction will an acid and a base react with each other?
combustion
neutralization
oxidation-reduction
decomposition
What do you think air would
look like if you could zoom in and see its
structure and composition
Answer:
clouds
Explanation:
Sublimation occurs when moving from
1) G to H.
2) I to J.
3) J to I.
4) I to H.
What is the volume of 1g of ice in cm3?
Answer:
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What is the volume of 1g of ice in cm3?
Explanation:
choose a spot outside or inside your house as your reference point. it may be a trer ,bench,cabinet,refrigerator,pr sink.
Answer:
I choose my table
CH3CH2CH2CH2CH3
Balanced chemical equation for this
Answer:
C5H12 + 8O2 --> 5CO2 + 6H2O
Explanation:
Complete question
Write a balanced chemical equation to represent the combustion of CH3CH2CH2CH2CH3
Solution
The given compound is pentane
C5H12
The empirical equation representing combustion of pentane is
C5H12 + O2 --> CO2 + H2O
We will first balance the carbon atoms
C5H12 + O2 --> 5CO2 + H2O
Now we will balance the Hydrogen molecule
C5H12 + O2 --> 5CO2 + 6H2O
Now we will balance the oxygen molecule
C5H12 + 8O2 --> 5CO2 + 6H2O
What was the main purpose of the opportunity rover?
Answer:
Explanation:The major goals of the two rovers, according to NASA, were to determine whether life as we know it could ever have arisen on Mars (focusing particularly on searching for ancient water) and characterizing the climate and geology of
Answer:
The major goals of the two rovers, according to NASA, were to determine whether life as we know it could ever have arisen on Mars (focusing particularly on searching for ancient water) and characterizing the climate and geology of the planet
Calculate the number of atoms in a 7.91×103 g sample of calcium.
For the balanced equation shown below, what would be the limiting reagent if 93.9grams
of C2H3F were reacted with 254grams of O2?
4C2H3F + 1102 ---> 8C02 + 6H2O + 2F2
A. C2H3F
B. 02
C. CO2
D. F2
Answer: A. C2H3F
Explanation:
How many grams of sodium hydroxide are needed to completely react with 50.0 grams of H2SO4?
Answer:
48.0 grams
Explanation:
The products of this reaction are nitrogen gas and water. How many grams of sodium hydroxide (NaOH) are needed to completely react with 50.0 grams of sulfuric acid (H2SO4) to form sodium sulfate (Na2SO4) and water? 2NaOH + H2SO4 → Na2SO4 + 2H2O ; 48.0 grams of NaOH are needed.
51.020 grams of sodium hydroxide is needed to completely react with 50 grams of sulfuric acid according to stoichiometry.
What is stoichiometry?It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.
The reaction between sodium hydroxide and sulfuric acid is as follows,
2 NaOH + H₂SO₄[tex]\rightarrow[/tex]Na₂SO₄+2 H₂O
From the reaction, it is clear that 2 oles of sodium hydroxide react with 1 mole of sulfuric acid to give products. According to molar mass concept,
100 g of sodium hydroxide gives 98 g of sulfuric acid
Therefore, 50 gram of sulfuric acid requires 50×100/98=51.020 g
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What is the name of the covalent compound PCl5
Answer:
Phosphorus pentachloride
Explanation: P is Phosphorus, Cl is Chlorine. Penta is latin for 5.
The name of the covalent compound PCl₅ is phosphorous pentachloride as it has five chlorine atoms.
What is an atom?
An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
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Doraemon part of the water cycle heat from the Sun causes liquid to change into water vapor Which Resident to the atmosphere which statement best describes the reverse of this process
Answer:
it is most likely as a water cycle
What happened to Mendeleev's mother after he was accepted into St. Petersburg University?
Answer:
his mother died i think
Explanation:
Although he was not accepted, his mother was determined to give her son a first-class education and they walked to St. Petersburg. Dmitri was accepted into the Institute of Pedagogy on a full scholarship. That same year his mother died and at the age of sixteen, Dmitri was orphaned.