Chemistry High School

please help fast
I WILL MARK YOU AS BRAINLIEST ​

Please Help FastI WILL MARK YOU AS BRAINLIEST

Answers

Answer 1

Answer:

c

Explanation:

all the atoms must be balanced.

Related Questions

True or False: The frog's eyes help it see in all directions. False True

Answers

False, frogs cannot see in all directions.

how many electrons does the atom have

Answers

Answer:

8

Explanation:

The reaction of iron ore with carbon follows the equation: 2 Fe2O3 + 3 C 4 Fe + 3 CO2.
How many grams of Fe can be produced from a mixture of 200. g of Fe2O3 and 300. g of C?
In the above problem, which reactant is limiting and which is in excess?

Answers

Answer:

The person writes a coefficient of 2 in front of Fe2O3 but then writes a 4 for the number of iron (Fe) atoms. Explain this difference.

Explanation:

The iron oxide Fe₂O₃ is the limiting reagent while carbon (C) is the excess in the given reaction.

What is the limiting reagent?

A limiting reagent can be described as a reactant that is completely exhausted from the reaction mixture at the completion of a  reaction and is also named a limiting reactant.

When reactants in the chemical reaction are not taken in stoichiometric quantities, the limiting reactant will determine the maximum amount of product that can be formed in a chemical reaction from the reactants.

Given, a balanced chemical equation of the reaction between iron oxide and carbon is:

[tex]2 Fe_2O_3 + 3 C\longrightarrow 4 Fe + 3 CO_2[/tex]

Given, the amount of the iron oxide = 200 g

The molecular mass of the iron oxide = 159.69 g/mol

The number of moles of iron oxide = 200/159.69 = 1.252

Given the mass of the carbon, = 300 g

The number of moles of carbon = 300/12 = 25

If 2 moles of iron oxide react with carbon moles = 3

1.252 moles of Fe₂O₃ will react with carbon = (3/2) × 1.252 = 1.878 mol

Therefore, Fe₂O₃ is the limiting reactant and carbon is the excess reactant.

Learn more about limiting reagents, here:

brainly.com/question/26905271

#SPJ2

In sexual reproduction, how many genes does an offspring receive for each trait ‍♀️​

Answers

Answer:

Each parent's half of the genes acquired  by the offspring. They  have two of each chromosome and hence two alleles of each gene, and one acquired from each parent.

what do plants need to live?
put a mark next to the ones that plants need to live
sunlight
soil
water
plant food from a garden store
sugar
carbon dioxide
minerals
fertilizer
leaves
oxygen
chlorophyll
vitamins
i'll mark brainliest for whoever has the right answer or who ever answers it!

Answers

Sunlight, soil, water, leaves,

Answer:

Explanation:

sunlight

soil

water

sugar

carbon dioxide

minerals

leaves

vitamins

(02.02 MC)
During the hot summer days, there is a lot more water in the air. This is due to which change of state?

Answers

This is due to evaporation

Choose the chemical equation that is correctly balanced.

Answers

Answer:

their is nothing their btw just letting you know

There is no choices can u add a pic or something

What does it mean for a system to be in dynamic equilibrium?

Answers

The rate of the forward reaction equals the rate of the backward reaction. A dynamic equilibrium is a chemical equilibrium between a forward reaction and the reverse reaction where the rate of the reactions are equal.

Answer:

a state of balance between continuing processes.

Explanation:

Dynamic equilibrium only occurs in reversible reactions, and it's when the rate of the forward reaction is equal to the rate of the reverse reaction.

An atom gains electrons to become negatively charged
А
anion
B
cation
с
ionic bond
D
covalent bond
E
metallic bond

Answers

Answer:

A) an anion is an ion with a negative charge

B) a cation is an ion with a positive charge

The rest are bonds and do not pertain to the question

where do you find the reactants in a chemical equation ​

Answers

On the left side of the equation is the reactants (starting side) and the right side (end side) is the products.

Two students were doing an experiment which involved adding potassium sulfate powder to water. They added one teaspoon of potassium sulfate to the water and stirred it, and all the powder dissolved. They continued to do this until, after the fourth teaspoon, no more potassium sulfate would dissolve.

As more potassium sulfate dissolves in the water, the mixture becomes

a. more concentrated.
b. less concentrated.
c. dilute.
d. more cloudy.

Answers

Answer:

less concentrated

Explanation:

because it will get dissociated into more ions

The amount of kinetic energy an object has depends on which feature of the object?

Answers

Answer:

Depends on its mass and its speed.

Answer:

I think it is A

Explanation:

Because if you think about is Kinetic energy is motion

so i think it is

Its  motion

The hydra is an organism that reproduces by growing another organism from the sie of its tubular body. What type of asexual reproduction is this?

Answers

Answer:

Explanation:

budding

Figure 13.3 (a) Hydra reproduce asexually through budding: a bud forms on the tubular body of an adult hydra, develops a mouth and tentacles, and then detaches from its parent. The new hydra is fully developed and will find its own location for attachment.


When wood is burned, new substance are produced. Describe this reaction, and explain
what type of changes occurs. Use the terms flammability, chemical property, and physical
change or chemical change.

Answers

Answer:

hahahaha

Explanation:

hahahahahhahahaha soooo funny

How many grams of barium sulfate are produced if 125 mL of .050 M sodium sulfate are reacted with excess barium nitrate in the following reaction?

Ba(NO3)2 + Na2SO4 = BaSO4 + NaNO3

Answers

Answer:

2.79g

Explanation:

why do gases behave least like ideal gases at low temperature and high pressure?​

Answers

Because the molecules are less exited. More heat and pressure the more they are exited

The ideal gas law fails at low temperature and high-pressure because the volume occupied by the gas is small, therefore the inter-molecular distance between the molecules falls. And hence, an attractive force can be seen between them.

What is ideal gas law ?

The ideal gas law states that the pressure, volume, and temperature of a gas are directly proportional to each other, as long as the number of particles and the mass of the gas remain constant. So long as the number of particles and gas mass remain constant.

The ideal gas law can be utilized to calculate the volume of gases produced. The ideal-gas equation often is used to interconvert between volumes and molar amounts in chemical equations.

At high pressures, the molecules of a gas are crowded closer together, and the amount of vacant space between the molecules is reduced.

Thus, gases behave least like ideal gases at low temperature and high pressure.

To learn more about the ideal gas law, follow the link;

https://brainly.com/question/28257995

#SPJ6

Would you rather get tips or a commission for your wages? Why?​

Answers

Answer:

commission

Explanation:

Employers benefit from paying a commission to their employees because it means that they only pay the employee if there is a sale. ... It also improves the cash flows of the business because it means that employees are only paid when money is coming in from a sale.

If i were a maneger I would love commision For the reason that is stated above, but if I was just an employe I would rather work from tips.

plzzz!!! Write the equation for rusting urgently needed​

Answers

Answer:

[tex]Fe_{2} O_{3}[/tex]

Explanation:

Three reasons why friction is needed

Answers

Answer:

1:Without friction, we would not be able to stop walking since we would just keep slipping like on ice.

2:Without friction, objects would just slip and fall with a simple blow of air

3:And finally, without friction, we wouldn't be able to use machinery like cars and etc since they would just fly off

Explanation:

Friction can be a useful force because it prevents our shoes from slipping on the pavement when we walk and stops car tires skidding on the road. When you walk, friction is caused between the tread on shoes and the ground. This friction acts to grip the ground and prevent sliding. Sometimes we want to reduce friction.

Find the Oxidation Number for both Ca and F.
EXPLAIN PLEASE

Answers

Answer:

F= -1 (group 7A)

Ca= +2 (group 2)

Explanation:

oxidation #= # electrons atom gains/loses to form chemical bond

>assigned to atoms in oxidation-reduction rxn to indicate ability to donate/ gain e-

> positive oxidation #= loss of e-, negative= gain of e-

rules:

all group 2 elements (ca) have an oxidation state of 2+

group 7A (F)= -1 charge (needs to gain 1 e- to complete octet)

Label the liquids from least to most dense, Vegetable oil, water, Dish soap, Corn syrup, Honey

Answers

Answer:

1. Vegetable oil

2. Water

3. Dish soap

4. Corn syrup

5. Honey

As you move from left to right across the second period of the periodic table

A. Ionization energy increases
B. Atomic mass decreases
C. Electronegativity decreases
D. Atomic radii increase

Answers

Answer:

A. ionizing energy increases

A tabular form in which the chemical elements are positioned according to the chemical and physical attributes is called the periodic table. The horizontal rows from left to right is referred as periods in the table.

The correct option is:

Option A. Ionization energy increases

This can be explained as:

The ionization energy raises from left to right because of valence shell resilience.

The nuclear charge on the atom expands and protons in the nucleus lure the electrons more strongly.

Therefore due to the high proton number, the ionization increases across the period.

To learn more about ionization energy follow the link:

https://brainly.com/question/2120186

HELP ME pls it’s in the picture below

Answers

Answer:

Hydrated chromium(III) phosphate or chromium(III) phosphate tetrahydrate.

Answer:

the IUPAC name is chromium(III) phosphate pentahydrate.

Which will dissolve at the fastest rate?

a. 15 g of sugar cubes at 20° C
b. 15 g of sugar cubes at 60° C
c. 15 g of granulated sugar at 20° C
d. 15 g of granulated sugar at 60° C

Answers

I need help on this one too I think it might be (b)

__________ is a result of a chemical reaction between pollutants and water and is one cause of chemical weathering of rock.
A.) carbon dioxide
B.) acid rain
C.) oxidation
D.) ice crystals

Answers

Answer:ice crystals

Explanation:

if a +2 ion has 18 electrons, what element is it

Answers

calcium. i believe this is the correct element

When does a phyisical change occur?

Answers

Physical changes occur when objects or substances undergo a change that does not change their chemical composition. This contrasts with the concept of chemical change in which the composition of a substance changes or one or more substances combine or break up to form new substances.

Solar energy does not warm Earth’s surface evenly. For example, during the day, land areas warm up faster than nearby bodies of water. How does this uneven warming affect the movement of air over land and water?

Answers

Answer:

Land and sea breeze

Explanation:

This uneven warming of the land during the day results in the phenomenon called land and sea breeze.

During the day, the land heats up faster than the nearby ocean. Ocean is made up of water with a high specific heat capacity. This derives pressurized air near the surface of the land to the ocean. At night, the ocean does not easily lose heat after the land has lost its own. Pressurized air moves from the ocean to the land. This causes the warming of the land during the night.

Describe fusion and explain how fusion and fission are similar and how they are different.

Answers

Answer: Fusion and fission are similar in that they both release large amounts of energy. Nuclear fusion is a process in which two nuclei join to form a larger nucleus. Nuclear fission is a process in which a nucleus splits into two smaller nuclei.

Explanation:

If a sample of gas occupies a volume of 6.80 L at 325°C, what will its volume be at
25.0°C if the pressure does not change?

Answers

Answer:

3.4L

Explanation:

Given parameters:

Initial Volume of gas = 6.8L

Initial temperature of gas  = 325°C = 325 + 273  = 598K

Final temperature  = 25°C = 25 + 273  = 298K

Unknown:

Final volume  = ?

Solution:

To solve this problem, we apply the Charles's law. It can be expressed as;

           [tex]\frac{V1}{T1}[/tex]   = [tex]\frac{V2}{T2}[/tex]

V and T are volume and temperature

1 and 2 are initial and final states

Now insert the parameters and solve;

           [tex]\frac{6.8}{598}[/tex]   = [tex]\frac{V2}{298}[/tex]  

          2026.4 = 598V2

          V2 = 3.4L

Other Questions
I NEED HELP PLEASE ANSWERMultiple Choice:- Rationalize the denominator - Convert the bottom of the LHS using an identity- Factor the RHS- Convert tan^2(theta) + 1 of the RHS using an identity- Find common denominators for RHS- Cancel the 1s on LHS Who answers it first is the winner plz Aranza wrote the equation below. What is the slope? __________ *y=4x+3 A gas occupies 4.31 liters at a pressure of 0.755 atm. Determine the volume if the pressure is increased to 1.25 atm. (Boyle) Match the terms with the definitions 1) B Cells 2) T Cells3) Antibody4) Antigen5) Innatea) Produces specific antibodies for the acquired immune systemb) White blood cells that destroy pathogensc) Proteins on the surface of pathogens d) Markers for destruction e)Non-specific PLEASE PLEASE HELP ME I WILL GIVE BRAINALIST AND EXTRA POINTS TO THE FIRST PERSON Dean loves rocks! He has 6 pieces of granite, 3 pieces of marble, 14 pieces of sandstone, and 1 piece of slate.What is the ratio of pieces of sandstone to pieces of marble in Dean's collection? please help me with question Which short-term consequences of sleep deprivation is a student likely to encounter? Check all that apply.falling asleep in classmissing assignmentslow test scoresdecreased stresslack of concentrationfewer friends A car has an initial value of 20,000 the value then depreciates or decreases by 10% of in initial value each year which equation below gives the value of the car Compare and contrast subject and theme. Your answer should be 3-4 SENTANCES. Describe 2 ways of arresting haemorrhage. Respiration is the process in which organisms break down food to release ____.a.energyc.sugarb.nutrientsd.oxygen What is a limiting reagent? A.) The reactant that is used up first in a reaction B.) The reactant that is used the least reactive in a reaction C.) the reactant with the smallest coefficient in the equation D.) the reactant with the largest coefficient in the equation pls help me im begging u pleaseee helpp ill give brainliest last month you spent $325 on food your monthly income is $2600 what percent did you spend on food? 1. If you start in Los Angeles, CA and go WEST over the International Dateline, you would move your calendar_________ a day. 2.If you start in Sydney, Australia and go EAST over the International Dateline, you would move your calendar_______ a day. What causes your skin to feel warm when it is in the sun on a summer day?A Particles in the atmosphere reflect energy from the Sun downward.B Hot particles from the Sun still carry some heat when they reach your skin.C The solar wind carries heated air from the Sun's atmosphere to Earth's surface.D The Sun radiates energy that passes through space and the atmosphere to your skin. Which identifies the transformation that occurred after the dilation?a translation of 9 units to the righta translation of 3 units downa reflection across the x-axisa reflection across the y-axis Kaley and Tom both work at Publix. for $7.68 per hour. This week Kaley worked 5 more hours than Tom in overtime. Write an expression that represents the weeks' wages for Kaley and Tom if h represents the number of hours Tom worked? What is another way to write the expression?