Chemistry High School

PLZ I NEEEEEEEDDDDDD HELP

PLZ I NEEEEEEEDDDDDD HELP

Answers

Answer 1

Answer:

2h+02=h20

Explanation:

2 in front of h on left side

2 in front of h on right side

Answer 2

Answer:

Explanation:

1. __1___ Fe + __1___ S → __1___ FeS. 2. __1___ H2 + __1___ Cl2 → __2___ HCl. 3. __2___ Mg + __1___ O2 → __2___ MgO. 4. __1___ O2 + __2___ H2

Related Questions

How many orbitals are for p shapes

Answers

Answer:

3

Explanation:

From the table below we see that we can have three possible orbitals when l = 1. These are designated as p orbitals and have a sort of 8 shapes. Each of the p orbitals has a different orientation in three-dimensional space.

Give an example of elastic potential energy

Answers

Answer:

An archer's stretched bow.

Explanation:

Elastic potential energy is energy stored as a result of applying a force to deform an elastic object.

Which organelle of a prokaryotic cell contains genetic information?


cell membrane


ribosomes


nucleus


nucleoid

Answers

Answer:

The right option is the 4 one. nucleoid

Prokaryotic cells are simple cells that lack a definite nucleus and some membrane-bound organelles. Prokaryotic cells have a nucleoid region, which is an irregularly-shaped central region of the cell that contains the cell’s genetic information (DNA). Other organelles that can be found in prokaryotic cells include plasma membrane, cell wall, cytoplasm, and ribosomes.

Explanation:

Answer:

nucleoid

Explanation:

Select the correct answer.

Which statement best describes how chemical equations demonstrate conservation of mass?

A.
The number of reactants is the same as the number of products.
B.
The compounds are the same on each side of the reaction.
C.
The number of atoms of each element is the same on each side of the equation.
D.
The state of matter is the same on each side of the equation.

Answers

Answer:

All of the Above

A.The number of reactants is the same as the number of products.

B.The compounds are the same on each side of the reaction.

C.The number of atoms of each element is the same on each side of the equation.

D.The state of matter is the same on each side of the equation.

Explanation:

Answer:

C

Explanation:

I did the test

A by-product of photosynthesis that is not used by the plant, but rather released into the air, is ________________.

Answers

Answer: I think is carbon dioxide!!

Explanation: ( i havent learned about photosynthesis in a long time :) )

hope i helped!! also have a good day!

Balance the equation
AgBr +
GaPO4 →
Ag3PO4 +
GaBi3

Answers

Answer:

3AgBr + GaPO4 ----> Ag3PO4 + GaBr3

Explanation:

A fixed mass of oxygen gas occupies 300cm cube at 0 degree centigrade. what volume would the gas occupy at 15 degree centigrade​

Answers

Answer:

hey

Explanation:

What animal did Darwin study in the Galapagos Islands?
1. Yellow fin tuna
2. Spiders
3. Hawks
4. Finches

Answers

Answer:

The answer is 4.

Explanation:

Finches.

Answer:

4. Finches

Darwin studied the forms of the beak, and found that they were different based on what they ate.

A boy sets up a picnic on the beach next to a sand dune. how are sand dunes formed?

Answers

Answer:

Sand dunes are created when wind deposits sand on top of each other until a small mound starts to form. Once that first mound forms, sand piles up on the windward side more and more until the edge of the dune collapses under its own weight.

which part of the plant you think is the least important?

Answers

Answer:

Well maybe the pedals they don't help much

Explanation:

Answer:

brainliest please

Explanation:

the pollen probably because other plants have it

What is the name of the element with the chemical symbol B?​

Answers

Answer:

boron

Explanation:

cuz science.......

Can a hype Glow in the dark ?

Answers

i’ve only had one and it didn’t flow so ion think so

The theory of _______ of matter states that cannot be created or destoryed

Word bank: Matter Volume Element Conservation Mass Atoms Properties

Answers

Answer:

mass pic is explanation hope it helps

In which of these do you need to know the direction in which the object is moving?
velocity
instantaneous speed
average speed
mass

Answers

Answer:

velocity

Explanation:

Which would have the greatest evaporation: pure water or salt water?

Answers

Answer:

Pure Water.

Explanation:

Pure water evaporates faster than salt water.

8. Which type of bond results when one or more valence
electrons are transferred from one atom to another?
A) a hydrogen bond
B) an ionic bond
C) a nonpolar covalent bond
D) a polar covalent bond

Answers

Answer:

B

Explanation:

How many Joules of heat are required to melt 250 grams of ice at 0°C?
AHfus = 334 J/g
AHvap = 2258 J/g
Cp= 4.184 J/g C

Answers

Answer:

cp =4.184/c / j

Explanation:

ahvap=2258j/g

Heat required : Q = 83500 J = 83.5 kJ

Further explanation

Given

mass ice = 250 g at 0°C

Required

The heat required

Solution

The heat to change the phase can be formulated :

Q = m.Lf (melting/freezing)

Lf=latent heat of fusion

Input the value :

Q = 250 g x 334 J/g

Q = 83500 J

Classify the two balanced equations representing two chemical reactions
1 Cl2 + 2 NaBr + NaCl + 1 Br2 and 2 NaCl +2 Na + 1 Cl,
O Synthesis & Decomposition
O Synthesis & Double Replacement
O Single Replacement & Double Replacement
O Single Replacement & Decomposition

Answers

Single Replacement & Decomposition

Further explanation

Given

Two chemical reactions

1. Cl2 + 2NaBr ⇒2NaCl + Br2

2. 2NaCl ⇒2Na + Cl2

Required

Type of reaction

Solution

Equation 1 : A single replacement reaction is a chemical reaction in which one element replaces the other elements of a compound to produce new elements and compounds

General formula :

A + BC ⇒ AC + B

Equation 2 : the decomposition reaction of a compound into its constituent elements or compounds

General formula :

AB ⇒ A + B

According to the kinetic molecular theory, which statement describes the particles in a sample of an ideal gas

Answers

Explanation:

an ideal gas moves in constant, rapid motion

How many grams of NH3 can be dissolved in 50 grams of water at 50oC?

Answers

15 grams of  NH3 can be dissolved

Further explanation

Given

50 grams of water at 50°C

Required

mass of NH3

Solution

Solubility is the maximum amount of a substance that can dissolve in some solvents. Factors that affect solubility  

1. Temperature: 2. Surface area: 3. Solvent type: 4. Stirring process:

We can use solubility chart (attached) to determine the solubility of NH3 at 50°C

From the graph, we can see that the solubility of NH3 in 100 g of water at 50 C is 30 g

So that the solubility in 50 grams of water is:

= 50/100 x 30

= 15 grams

HELP ASAP DUE IN 5 MINUTES

Answers

the second one i think, hope this helps

Answer:

 a

Explanation:

Calculate the molecular formula of a compound with the empirical formula CH O and a molar mass of 150 g/mol.

A) C2H4O2

B) C3H6O3

C) C4H8O4

D) C5H10O5

E) C6H12O6

Answers

The molecular formula : D) C₅H₁₀O₅

Further explanation

Given

The empirical formula CH₂O

The molar mass of 150 g/mol

Required

The molecular formula

Solution

The empirical formula is the smallest comparison of atoms of compound forming elements.  

A molecular formula is a formula that shows the number of atomic elements that make up a compound.  

(empirical formula) n = molecular formula  

(CH₂O)n = 150 g/mol

(12+2.1+16)n = 150

(30)n = 150

n = 5

A chemical process used to produce ethanol as a fuel additive was expected to produce 5,000 kilograms of ethanol based on the amounts of starting materials used, but only 4,760 kilograms were produced. What was the percent yield for ethanol in this process?
A)1.09
B)4.80
C)95.2
D)105

Answers

Answer:

C)95.2

Explanation:

Given parameters:

Expected yield  = 5000kg

Experimental  yield  = 4760kg

Unknown:

Percentage yield  = ?

Solution:

The percentage yield of the substance is determined by find the ratio of the true experimental yield to the expect yield and multiply by 100;

  Percentage yield  = [tex]\frac{4760}{5000}[/tex] x 100 = 95.2%

Select the set of coefficients that would balance the following equation:
S + HNO3 →
H2SO4 + NO2 + H2O
O 3, 2, 2, 3,1
O 6, 2, 2, 6, 2
O 1.6, 1, 2,6
O 1,6, 1, 6,2

Answers

i think it’s the second one

HELP! IM GIVING BRAINLIST.What is salinity?

Question 1 options:

The concentration of dissolved salt in a liquid


to become incorporated with a liquid in forming a solution


a liquid mixture in which the smaller component (solute) is distributed evenly through the major component (solvent)

Answers

Answer:eighter a b or c

nah i am playing it is a

Explanation:

Answer:

A is correct i took the quiz

Explanation:

which of these hypothesis is not falsifiable?
a. there is life on other planets.
b. our sun will burn out within the next billion years.
c. the universe is stagnant.
d. jupiter is the best planet in our solar system.

Answers

Answer: it is D

Explanation:its D cause that is a opinion it is not sientificly correct

help me out please!?

Answers

Answer:

area a

Explanation:

Which layer of the atmosphere is directly above the troposphere?
exosphere
stratosphere
troposphere
mesosphere

Answers

Answer:

stratosphere is directly above troposphere I think

The answer is stratosphere.

plsss help ASAP!!!
BRAINLIEST

Answers

Answer:

-175.15

Explanation:

1.0 °C = 274.15 K

2.0 °C = 275.15 K

3.0 °C = 276.15 K

4.0 °C = 277.15 K

5.0 °C = 278.15 K

6.0 °C = 279.15 K

7.0 °C = 280.15 K

8.0 °C = 281.15 K

9.0 °C = 282.15 K

371.7 k hope this helps

How many grams are there in 2.75E23 molecules of C2H6 (MM = 30 grams)?

Answers

Answer:13.70 i think

Explanation:

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