Answer: oder has mass
Explanation:
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.
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
What are the characteristics of a gas?
A. no definite shape but a definite volume
B. a definite shape but no definite volume
C. a definite volume and definite shape
D. no definite shape or definite volume
Answer:
D. no definite shape or. definite volume
Explanation:
Gases do not have a definite shape or volume because the molecules in gases are very loosely packed, they have large intermolecular spaces and hence they move around. The particles of solid are closely packed and occupy less space while particles of gases are loosely packed and occupy the complete space available.
how to get a girlfrend at age 70
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:
Draw the organic product(s) formed when CH3CH2CH2OH is treated with each reagent. a. H2SO4 e. SOCl2, pyridine i. [1] TsCl, pyridine; [2] NaSH b. NaH f. PBr3 j. POCl3, pyridine c. HCl ZnCl2 g. TsCl, pyridine d. HBr h. [1] NaH; [2] CH3CH2Br
Answer:
See answer below
Explanation:
In this case, we are treating an alcohol with different reagents to give different products. In the picture below you have the draw of each product, and here, the explanation.
a) H₂SO₄: In this case, it will promote an E1 reaction forming an alkene as product.
b) NaH: In this case, it will promote an acid base reaction, and the final product will be an alcoxide.
c) HCl/ZnCl₂: In this case, primary alcohols reacts with this reactive to form an alkyl halide.
d) HBr: Another reaction forming an alkyl halide with bromine in this case.
e) SOCl₂: Similar to c), it will form an alkyl chloride.
f) PBr₃: Similar to d, forming an alkyl bromide.
g) TsCl: Here it will be a sustitution reaction, where tosilate replaces the OH
h) NaH/CH₃CH₂Br: In this case it will form an alcoxide and then, a larger alkyl.
i) TsCl/NaSH: First it will form a tosilate and then, the SH group. A sustitution reaction.
j) POCl₃: A sustitution reaction forming an alkyl chloride.
See picture below for drawings.
Hope this helps
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
Sugar
O2
CO2
H2O
What is the name of this energy pathway?
thnxx for free point? ?????????
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
Learn more about stoichiometry ,here:
https://brainly.com/question/28780091
#SPJ2
is this right someone please help asap photo attached above
Sublimation occurs when moving from
1) G to H.
2) I to J.
3) J to I.
4) I to H.
A spider has several eyes.
What is the main function of these organs?
I’ll give y’all 100 points
Answer:
it is d
Explanation:
Answer: d
Explanation: i think that answer
Based upon the percent yield you calculated, what is one source of error, and the resulting of that error in your experiment.
Select the option corresponding to the following choices
a. When decanting, some solid was lost, resulting in less copper recovered and a lower % yield
b. When decanting, some solid was lost, resulting in more copper recovered and a higher % yield
c. When drying over the steam bath, did not let the sample dry completely, resulting in a higher mass of copper recovered, and a higher % yield.
d. When drying over the steam bath, did not let the sample dry completely, resulting in a lower mass of copper recovered, and a lower % yield.
Answer:
The answer is "Choice a".
Explanation:
In the given question, through the basis of their determined percentage yield, a smaller copper increase in value and less copper has been lost during decanting, but now this mistake in your experiment was the cause of confusion, and the wrong choice can be defined as follows:
In point b, it is wrong because A few other solids were not lost during decanting, resulting in a higher recovery of copper as well as a boost in the percentage yieldIn point c, it is wrong because whenever the vapor bath was dried, the specimen did run dry totally, which did result in such a heavier density of copper and a larger percentage of the yield.In point d, it is wrong because whenever the vapor bath was dried, the sample was fully dried, which also resulted in much less adhesive weight and a much less percentage of the yield.PLEASE HELP ME!! DIMENSIONAL ANALYSIS
CHEMISTRY
DUE IN 5 MINS!!!
Answer:
12 mi/h
Explanation:
Step 1: Given data
Total distance (d): 6 kmTime elapsed (t): 19 minStep 2: Convert "d" to miles
We will use the conversion factor 1 mi = 1.60934 km.
6 km × 1 mi/1.60934 km = 3.7 mi
Step 3: Convert "t" to hours
We will use the conversion factor 1 h = 60 min.
19 min × 1 h/60 min = 0.32 h
Step 4: Calculate the average speed of the runner (s)
The speed is equal to the quotient between the total distance and the time elapsed.
s = d/t
s = 3.7 mi/0.32 h = 12 mi/h
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.
Why is n-hexanol is not soluble in H2O
Answer:
Ethanol is soluble in water because it has a hydroxyl group which allows it to form hydrogen bonds with the water molecules. This is why hexanol is not soluble in water.
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
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 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.
An unknown organic compound containing carbon, hydrogen, and oxygen, is subjected to combustion analysis. When 3.498 g of the unknown compound is combusted, 7.950 g of CO2 and 3.255 g of H2O is formed. What is the molecular formula of the unknown compound if its molar mass is 174.27 g/mol?
Answer:
Molecular formula for the organic compound is: C₉H₁₈O₃
Explanation:
We determine the combustion reaction:
CₓHₓOₓ + O₂ → CO₂ + H₂O
We don't know the subscrip of the organic compound, that's why we put x.
Notice we have C in the compound and in CO₂. Let's find out the mass of C. 1 mol of CO₂ contains 1 mol of C
Then (7.950 g /44g/mol) of CO₂ may contain ?
(7.950 g /44g/mol) represents the moles of dioxide → 0.181 moles of C
These moles came from the mass of the organic compound, the 3.498 g.
So now, we can know the subscript for C.
If 3.498 g of the compound contain 0.181 moles of C
174.27 g of the compound may contain (174.27 . 0.181)/ 3.498 = 9
Let's do the same for the H.
1 mol of water contain 2 moles of H
(3.255 g /18 g/mol) of water, may contain ?
3.255 g /18 g/mol = 0.181 moles . 2 = 0.362 moles of H
These moles came from the mass of the organic compound, the 3.498 g.
Let's find out the subscript for H
If 3.498 g of the compound contain 0.362 moles of H
174.27 g of the compound may contain (174.27 . 0.362)/ 3.498 = 18
Organic compound is C₉H₁₈Oₓ. If the molar mass is 174.27 g we can easily determine the moles of O
12 g/mol . 9 + 1 g/mol . 18 + 16 g/mol . X = 174.27 g/mol
(174.27 g/mol - 12 g/mol . 9 - 1 g/mol . 18 ) / 16 = 3
Molecular formula for the organic compound is: C₉H₁₈O₃. Therefore the complete combustion reaction is:
C₉H₁₈O₃ + 12O₂ → 9CO₂ + 9H₂O
How much volume would a sample of galena have it its mass was 300 grams?
Answer:
8272uegdgd9w0wpwlw0w-w[w9w8177w7w7
Express in scientific notation 800678
How many atoms are in 2.5mol of sodium
Answer:
1024 sodium atoms.
THE PEAK TUTORS
12 Calculate the volume of concentrated sulphuric acid (density 1.84 g/mL), containing 98.0% H2SO4 by mass, that
would contain 40.0g pure H2SO4.
A 32.2mL B 52.2mL C 22.2mL D 42.2mL
Answer:a
Explanation:
ddk
What are three forms of the element carbon?
Answer:
There are at least eight forms of carbon: amorphous, graphite, diamond, fullerenes, aggregated diamond nanorods, carbon nanofoam, glassy carbon, and linear acetylenic carbon.
Explanation:
Explain the effects distance and mass have on the gravitational pull of the planets.
Answer:
Gravity is normal...
Explanation:
Objects with more mass have more gravity. Gravity also gets weaker with distance. So, the closer objects are to each other, the stronger their gravitational pull is. Earth's gravity comes from all its mass. So, theoretically speaking planets move or get pulled due to their huge amount of mass.
you have a sample of 23.8 g of C2H6. how many moles of C2H6 are in the sample?
Be sure to show your work and each step is writing out clearly.
Answer:
0.791 moles are present in the sample
Explanation:
To convert mass to moles of a substance you must find the molar mass of the susbtance.
The molar mass of C₂H₆ is:
2C = 12.01g/mol*2 = 24.02g/mol
6H = 1.01g/mol*6 = 6.06g/mol
Molar mass = 24.02g/mol + 6.06g/mol = 30.08g/mol is the molar mass of C₂H₆
And the moles of 23.8g of this substance are:
23.8g * (1mol / 30.08g) =
0.791 moles are present in the sampleWhere and how does respiration take place
Answer:
Glucose and oxygen react together in cells to produce carbon dioxide and water and releases energy. The reaction is called aerobic respiration because oxygen from the air is needed for it to work. Energy is released in the reaction. The mitochondria , found in the cell cytoplasm, are where most respiration happens.
PLEASE HURRY IM TIMED Which of the following are examples of physical changes? (Select all that apply.)
tearing a piece of paper
a nail rusting
crushing a soda can
Answer:
Explanation:
tearing a piece of paper
crushing a soda can