Answer:
23 43 45 43
Explanation:
What is responsible for an inherited trait? a. Environment b. Cells C. Dna d. Nutrition
Answer:DNA
Explanation:Dna
5. Determine if each statement is true or false about forming a hypothesis:
a. It must be long.
b. It is an educated guess.
c. It is in if…then format.
d. It must be testable.
e. It must start with I think.
A compound was analyzed and found to contain the following percent composition: 2.056% hydrogen, 32.69% S, and 65.26% oxygen. Calculate the empirical formula.
Answer:
H2SO4
Explanation:
Firstly,
2.056% hydrogen = 2.056g of H
32.69% Sulphur = 32.69g of S
65.26% oxygen = 65.26g of O
Next, we convert each mass into moles by dividing by their respective molar mass:
H = 1, S = 32, O = 16
H = 2.056/1 = 2.056mol
S = 32.69/32 = 1.021mol
O = 65.26/16 = 4.078mol
Next, we divide each mole value by the smallest mole value (1.021)
H = 2.056/1.021 = 2.01
S = 1.021/1.021 = 1
O = 4.078/1.021 = 3.99
Approximately the ratio of H to S to O is 2:1:4, hence, the empirical formula for H, S and O is H2SO4.
The empirical formula of a chemical compound is the simplest whole-number ratio of atoms present in a compound
The correct answer of the following is [tex]H_2SO_4[/tex]
The data is given as follows:-
2.056% hydrogen = 2.056g of H 32.69% Sulphur = 32.69g of S65.26% oxygen = 65.26g of O
We have to find the moles in the reaction.
The mas of the element is as follows:-
H = 1S = 32O = 16
After solving the equation we get
[tex]H = \frac{2.056}{1} = 2.056mol\\\\S = \frac{32.69}{32} = 1.021mol\\\\O = \frac{65.26}{16} = 4.078mol[/tex]
Next, we divide each mole value by the smallest mole value (1.021)
[tex]H = \frac{2.056}{1.021} = 2.01\\\\S = \frac{1.021}{1.021} = 1\\\\O = \frac{4.078}{1.021} = 3.99[/tex]
The ratio of H to S to O is 2:1:4,
Hence, the empirical formula for H, S, and O is [tex]H_2SO_4.[/tex]
For more information, refer to the link:-
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What is the molar mass of Ba3(PO4)2?
Answer:
601.93 g/molexplanation:Problem: The Ba3(PO4)2 (molar mass = 601.93 g/mol) precipitate that formed from a salt mixture has a mass of 0.667 g.
The molar mass of barium phosphate is 601.93 g/mol.
What is molar mass?Molar mass is defined as the mass of a compound divided by the number of moles which is the amount of substance .It is a bulk quantity and not a molecular property of a substance . They are mostly calculated by adding the atomic masses of constituent elements in a compound.
It is an average of many particles or molecules.Molar mass is an intensive property as it does not depend on size of the sample.It has units of kg/mol. Molar masses of elements is given by relative atomic mass of element whereas that of compounds is given by the sum of relative atomic mass multiplied by the molar mass constant.
They are never measured directly , they are measured from the standard atomic masses.
Learn more about molar mass,here:
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List and describe all five types of chemical reactions. thx.
Answer:
combination, decomposition, single-replacement, double-replacement, and combustion.
Explanation:
A mass of a gas occupies 840cm cube at 750mm pressure, what volume would it occupy at 780mm pressure
The final volume : 807.69 cm³
Further explanationGiven
Initial volume : 840 cm³
Initial pressure : 750 mmHg
Final pressure : 780 mmHg
Required
The final volume
Solution
Boyle's Law
At a fixed temperature, the gas volume is inversely proportional to the pressure applied
[tex]\tt p_1V_1=p_2.V_2\\\\\dfrac{p_1}{p_2}=\dfrac{V_2}{V_1}[/tex]
Input the value :
V₂=(P₁V₁)/P₂
V₂=(750 x 840)/780
V₂=807.69 cm³
Can someone help me on this please
Answer:
the answer for 5 is liquid
Write the following in standard notation: 2.8 x 10-5s.
Answer:
2.8 X 10-5s in standard notation is 28-5s
Explanation:
Multiply 2.8 by 10
Step 7: Determine the Limiting Reactant (Trial 2)
50
Analysis: The limiting reactant(s) appeared to be
because ...
Answer:
aluminum
no aluminum is left over
Explanation:
the next answers for step 7 are 0.019, 0.0093, aluminum
Answer:
Aluminum because no aluminum is left over
Explanation:
PLSS HELP I GIVE BRAINLIEST
Answer:
you r correct it is layer a and b
Explanation:
How many moles of H 2 will I need to make 5 moles of NH3?
12 SSO
Answer:
7.5 moles of hydrogen is required
Explanation:
Given data:
Number of moles of H₂ needed = ?
Number of moles of NH₃ = 5 mol
Solution:
Chemical equation:
N₂ + 3H₂ → 2NH₃
Now we will compare the moles of ammonia and hydrogen.
NH₃ : H₂
2 : 3
5 : 3/2×5 = 7.5 mol
Thus, 7.5 moles of hydrogen is required.
What are the two main types of energy?In an illustration, lines of force are drawn around a magnet to illustrate the magnetic
Calculate the percent composition of Fe in Fe(OH)3
Answer:
52.257%
Explanation:
What science should i take in highschool? (Biology,Chemistry,Physics)
Answer:
Biology
Explanation:
I'm currently taking highschool biology right now and it's a lot of fun. If you like animals and cells, a lot of fun.
Which statement best explains the net transfer of energy that is about to
happen in this photo?
A. The racket and the ball will both gain kinetic energy.
B. The ball will gain kinetic energy, and the racket will lose kinetic
energy
C. The racket will gain potential energy, and the ball will lose kinetic
energy
D. The racket and the ball will both lose potential energy
Answer:
Explanation:
B I got it right
Answer:
B. The ball will gain kinetic energy, and the racket will lose kinetic
energy
Explanation:
If you used .010 moles of baking soda, what mass of carbon dioxide should be produced?
Answer:
d
Explanation:
30 PTS!! chemistry - a new element chemistry TCT
Answer:
so is this a project or a quiz
Brainliest for an answer!
2 As (s) + 6 NaOH (aq) → 2 Na3AsO3 (s) + 3 H2 (g)
If 34.0g of As react with excess NaOH at STP, what volume of H2 will be produced in liters?
If you can answer this question quickly, I will mark you brainliest, I'm stumped to be honest.
The volume of H₂ : = 15.2208 L
Further explanationGiven
Reaction
2 As (s) + 6 NaOH (aq) → 2 Na₃AsO₃ (s) + 3 H₂ (g)
34.0g of As
Required
The volume of H₂ at STP
Solution
mol As (Ar = 75 g/mol) :
= mass : Ar
= 34 g : 75 g/mol
= 0.453 mol
From the equation, mol ratio As : H₂ = 2 : 3, so mol H₂ :
=3/2 x mol As
=3/2 x 0.453
= 0.6795
At STP, 1 mol = 22.4 L, so :
= 0.6795 x 22.4 L
= 15.2208 L
A boat covers 2,000 meters in 30 minutes. How fast are they traveling
0. Earth's rock is continually cycling through different states and locations. The diagram below shows the rock cycle. The labels for two processes are missing.
Weathering of
ROCKS at surface
IGNEOUS
ROCK
Uplin
SEDIMENTARY ROCK
METAMORIHIC ROCK
Melting
Which of these processes could be happening at the stage labeled 2?
o folding and mountain building
chemical changes due to heat and pressure
compaction and cementation of weathered sediments
subduction of an oceanic plate beneath a continental plate
Answer:
Chemical changes due to heat and pressure
Explanation:
Just took the test, hope this helps! :)
Answer:
Chemical changes due to heat and pressure
Explanation:
I took this test and got a 100%! :D
A process in which substances chemically rearrange to form new substances
Molecule
Energy
Organism
Chemical reaction
Matter
Cellular respiration
Answer:
Chemical reaction
Explanation:
After new substances are formed they can't be reversed to their original state.
what displays the number of atoms, nature and bond types in organic compounds
Answer:
Structural formula
Explanation:
Various type of formulae describe an organic compound. The empirical formula only shows the ratio of atoms of each element present. The molecular formula shows the exact number of atoms of each element present.
Lastly, the structural formula shows us the arrangement of these atoms in space. It shows us the number of atoms, nature and bond types in organic compounds.
The structural formula enables us to picture what the real molecule must look like.
A small bubble rises from the bottom of a lake, where the temperature and pressure are 8°C and 6.4 atm, to the water's surface, where the temperature is 25°C and pressure is 1.0 atm. Calculate the final volume (in ml) of the bubble if its initial volume was 2.1 ml.
a. 0.070 ml
b. 21 ml
c. 14 ml
d. 42 ml
Answer:
b
Explanation:
how many molecules are in 0.89 of silver
Answer:
5.36 × 10²³ molecules
Explanation:
Given data:
Number of moles of silver = 0.89 mol
Number of molecules = ?
Solution:
Avogadro number:
The number 6.022 × 10²³ is called Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
For example,
18 g of water = 1 mole = 6.022 × 10²³ molecules of water
1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen
Number of molecules of silver:
1 mole contain 6.022 × 10²³ molecules
0.89 mol × 6.022 × 10²³ molecules /1 mol
5.36 × 10²³ molecules
How many moles in 13 grams of C 2 H6 ? show work
Answer:
0.43mole
Explanation:
Given parameters:
Mass of C₂H₆ = 13g
Unknown:
Number of moles = ?
Solution:
To solve this problem we need to first find the molar mass of the given compound.
Molar mass of C₂H₆ = 2(12) + 6(1) = 30g/mol
So;
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Number of moles = [tex]\frac{13}{30}[/tex] = 0.43mole
What type of compound is AIN?
Answer:
aluminum nitride
Explanation:
i think
Name the following parts:
A—-
B——
C——
The beakers in the picture above are labeled according to the ionic solutions they contain. What metal or metals could replace copper in the copper(II) nitrate solution?
Explanation:
When a metal replaces another metal in solution, we say such a reaction has undergone a single displacement reaction.
In such a reaction, metal higher up in the activity series replaces another one due to their position.
To known the metal or metals that will replace the given copper, we need to reference the activity series of metals.
Every metal higher than copper in the series will displace copper from the solution.
So, there metals are: potassium, sodium, lithium, barium, strontium etc.
Which of these is an example of water in liquid form
Answer:
???????????????????????
Answer:
river or lake
Explanation:
The diagram shows heat energy being transferred as hot water rises to the top of the pot and cool water sinks to the bottom.
water cools
cool
water
sinks
cool
water
hot
sinks
water
rises
What process is shown in the diagram?
A conduction
B. convection
O c Insulation
O D. radiation