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

Will these groups of elements form ionic or molecular compounds? sodium and Iodine 

Answers

Answer:

Ionic

Explanation:

Answer:

carbon and hydrogen are molecular

Explanation:

Describe what happens to a liquid's molecules as it boils and changes into a gas.

Answers

Answer:

the particels becomes loose and wild, making gas happen when it is heated up

Liquids evaporate faster as they heat up and more particles have enough energy to break away. The particles need energy to overcome the attractions between them. At this point the liquid is boiling and turning to gas.

The condition of having a small amount of gravity is called _____.
free fall

ISS

microgravity

Answers

Answer:

The effects of microgravity can be seen when astronauts and objects float in space. Microgravity can be experienced in other ways, as well. "Micro-" means "very small," so microgravity refers to the condition where gravity seems to be very small.

ANSWER: MICROGRAVITY

CAN SOMEONE PLZ HELP ME ON THIS

Answers

Answer:

Q1. C

Q2.ring number 1 is 2

ring number 2 is 8 and

ring number 3 is 18

Q3. p can contain 6 electrons max

and d can contain 10 electrons max

Q4. D

An ideal gas does not exist.

Answers

Answer:

an ideal gas does not exist except as a conceptual notion, an ideal. Physicists and chemists idealized the behaviour of real gases so that they could explain these phenomena. Under conditions of low pressure and high temperature, all gases behave like real gases, even gases such as UF6 .

Answer:

True

Explanation:

Jimmy's Chemical reaction/ Recipe for making Grilled chese sandwiches is given below: 1 slice of cheese + 2 slices of bread = 1 Grilled chese sandwich ( mole ratio is, 1:2:1) If Jimmy has the following amounts of ingredients (reactants/ reagents) : 10 slices of cheese 30 hslices of bread Answer the questions below in your submission: a) What is the limiting reagent/reactant? b) what is the excess reactant? c) True or false? The number of glilled chese sandwishes he can make is decided by the limiting reactant because it gets used up most.

Answers

Answer:

See explanation

Explanation:

We have been told in the question that the equation of the reaction is; 1 slice of cheese + 2 slices of bread = 1 Grilled cheese sandwich ( mole ratio is, 1:2:1) .

Then the reagents are 10 slices of cheese 30 slices of bread. It then follows that 10 slices of cheese should be combined with 20 slices of bread according to the mole ratio.

However, we have 30 slices of bread and 10 slices of cheese so cheese is the limiting reactant while bread is the reactant in excess.

Yes, the number of glilled chese sandwishes he can make is decided by the limiting reactant because it gets used up most.

find the product of (x+a)(x-a)​

Answers

Answer:

x^2 - a^2

Explanation:

What is the density of an
object that has a mass of
120 g and volume of 5 ml?

Answers

The density of an  object ρ = 24 g/ml

Further explanation

Given

mass of an object = 120 g

volume = 5 ml

Required

The density

Solution

Density is a quantity derived from the mass and volume  

Density is the ratio of mass per unit volume  

Density formula:  

[tex]\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}[/tex]

ρ = density  

m = mass  

v = volume  

Input the value :

ρ = 120 g : 5 ml

ρ = 24 g/ml

How far does a car travel in 0.75 hr if it is moving at a constant speed of 88km/hr?

Answers

Answer:

66 km.

Explanation:

88 km / 1 hour = 66 km / 0.75 hours.

You need to just multiply 0.75 by 88.

The answer is 66 km.

Does the following compound contain a polyatomic ion? VF5
Yes
No

Answers

Answer:

the answer is yes

Explanation:

I don't no

How many orbitals exist for s shape

Answers

The s sublevel has only one orbital

Electrical energy is the amount of energy that an object contains due to kinetic energy​

Answers

Answer:

The energy an object has due to its motion is called kinetic energy. Factors Affecting Kinetic Energy: the kinetic energy of an object depends on both its speed and its mass. The faster an object moves, the more kinetic energy it has.

Explanation:

Gregor Mendel was a botanist, teacher
and monk. He was born in Austria. He
came up with the laws of Mendelian
inheritance in 1865. The laws explain
the principles of heredity.
Heredity
explains how offspring inherit traits
from parents. He figured out his laws
from studying pea plants. It turned out
those laws work for all living things.
They even work for people!
Which question is answered in this paragraph?

Answers

Answer:

C

Explanation:

It says he came up with the theory of heredity in the second paragraph, second sentence when it talks about his experiments with the pea plants.

How many grams of Cl2 are needed to produce 2.4 grams of NaCl?
2Na + Cl2 --> 2NaCl

Answers

The answer is 0.017110756386119. We assume you are converting between moles NaCl and gram. You can view more details on each measurement unit: This compound is also known as Sodium Chloride. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles NaCl, or 58.44277 grams.

Hope I helped :)

According to the stoichiometry of the given chemical equation, 1.45 g of Cl₂ are needed to produce 2.4 grams of NaCl.

What is stoichiometry?

Stoichiometry 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.

According to the given chemical equation, 70.906 g of chlorine gives 117 g sodium chloride, thus, 2.4 g of sodium chloride will be produced, when 2.4×70.906/117= 1.45 g of Cl₂ reacts.

Thus, according to the stoichiometry of the given chemical equation, 1.45 g of Cl₂ are needed to produce 2.4 grams of NaCl.

Learn more about stoichiometry,here:

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How many moles of ammonia gas are produced from 3.6 moles of hydrogen gas and excess nitrogen gas?

Answers

Answer:

If so, the limiting reagent of Nitrogen would allow 16 moles of Ammonia to be produced.

Explanation:

? + HCl -> FeCl2 + ?
CaO + ? -> Ca(NO3)2 + ?
? + Cu(OH)2 -> CuCl2 + ?

Answers

Answer:

1. Fe / H2

2. HNO3 / H2O

3. HCI / H2O

Answer:

1. Fe / H2

2. HNO3 / H2O

3. HCI / H2O

what best describes what forms in nuclear fission?
a. Two smaller, more stable nuclei
b. two larger, less stable nuclei
c. one smaller, less stable nucleus
d. one larger, more stable nucleus

Answers

Answer:

a. Two smaller, more stable nuclei

Explanation:

Answer:

a

Explanation:

took the quiz


CuSO4 +
KI →
Cul +
12 +
K2SO4

Answers

what’s exactly is the question?

How many grams of Na2SO4 can be produced from 423.67 g of NaCl?

Answers

Mass of  Na2SO4= 514.18 grams

Further explanation

Given

423.67 g of NaCl

Required

mass of  Na2SO4

Solution

Reaction

2NaCl + H2SO4 → Na2SO4 + 2HCl

mol NaCl :

= 423.67 g : 58.5 g/mol

= 7.24

From the equation, mol Na2SO4 :

= 1/2 x mol NaCl

= 1/2 x 7.24

= 3.62

Mass  Na2SO4 :

= 3.62 mol x 142,04 g/mol

= 514.18 grams

Einstein believed gravity existed in the fourth dimension as a _____.
curve

free fall

parabola

Answers

Einstein believed gravity existed in the fourth dimension as a curve.

Answer:

CURVE is the answer

I'm not sure how to do this ​

Answers

Search the full forms of those and then check how many molecules

Please answer this question please brianlest

Answers

made of cells, uses stimuli and it adapts
Order, sensitivity, response to environment, reproduction, growth, development, regulation, homeostasis, and energy . Hope this helps

BRAINLIEST & 5 STARS & A FREE THANK YOU

Why was Wegener’s theory of continental drift almost completely discarded?
A. It didn’t explain how continents fit together.
B. It didn’t explain how mountains formed.
C. It wasn’t supported by fossil evidence.
D. It didn’t have a mechanism for how drift occurred.

Which of the following is evidence that the continents were once part of a supercontinent called Pangaea?
A. Island Arcs
B. Deep ocean trenches
C. Glacier scrapings
D. Mid-ocean ridges

Answers

Answer:

1: The speculation that continents might have 'drifted' was first put forward by Abraham Ortelius in 1596. The concept was independently and more fully developed by Alfred Wegener in 1912, but his hypothesis was rejected by many for lack of any motive mechanism. 2: The most obvious evidence for continental drift is that the continents appear to fit together like pieces of a puzzle. But scientists were skeptical , and Wegener needed additional evidence to support his hypothesis. Glaciers covered large areas that are now parts of these continents.

Answer:

1. D

2. C

Explanation:

1. Although now accepted, the theory of continental drift was rejected for many years, with evidence in its favor considered insufficient. One problem was that a plausible driving force was missing. A second problem was that Wegener's estimate of the speed of continental motion, 250 cm/year, was implausibly high.

2.The most obvious evidence for continental drift is that the continents appear to fit together like pieces of a puzzle. But scientists were skeptical , and Wegener needed additional evidence to support his hypothesis. Glaciers covered large areas that are now parts of these continents.


What temperature in Kelvin is 52 degree C?

Answers

Answer:

325 K

Explanation:

why is it important for the appendages of an arthropod to be joined

Answers

Answer:

you mean "jointed." jointed appendages give arthropods much greater movement flexibility and range.

Describe how innate behaviors and learned behaviors differ? If you tell me the answer i will give you a brainliest answer :)

Answers

Answer:

The difference between an innate behavior and a learned one is that innate behaviors are those an animal will engage in from birth without any intervention. Learned behavior is something an animal discovers through trial, error and observation.

Explanation:

What is an ecosystem?

1 . All of the environments and all of the communities on the planet


2. The populations of all species and all abiotic factors within a geographical area.


3 .All of the individual organisms belonging to the same species within a geographical area



4. The populations of all species within a geographical area


5. All abiotic factors within a geographical area

Answers

2 !!!!!!!!!!!!!!!!!!!!!!!!!!!!

how many atoms are in 7.00 mol of potassium

Answers

Answer:

7 mole to atom = 4.21549905E+24 atom

Explanation:

1 mole to atom = 6.0221415E+23 atom

2 mole to atom = 1.2044283E+24 atom

3 mole to atom = 1.80664245E+24 atom

4 mole to atom = 2.4088566E+24 atom

5 mole to atom = 3.01107075E+24 atom

6 mole to atom = 3.6132849E+24 atom

7 mole to atom = 4.21549905E+24 atom

8 mole to atom = 4.8177132E+24 atom

9 mole to atom = 5.41992735E+24 atom

10 mole to atom = 6.0221415E+24 atom

Which energy resource produces the least amount of air pollution?


coal


natural gas


oil


hydropower

Answers

Answer:

hydropowered

Explanation:

 took the test

Hydropower is the energy source that produces the least amount of air pollution. Therefore, the correct option is option D.

What is energy?

Energy is The capacity or ability to do tasks, such as the ability to forcefully move an object. Energy can exist in a multitude of forms and can change from one to another, including thermal, mechanical, chemical, and nuclear energy. The flow of electric charges known as electrons is what generates electrical energy.

Energy is utilised to make a wide range of goods, power transportation, and power the appliances we use to heat and light our houses. The production of electricity is the main purpose of these various energy sources. All of these many energy sources contribute to the electrical power reserve that is then distributed to various locations via high-powered lines. Hydropower is the energy source that produces the least amount of air pollution.

Therefore, the correct option is option D.

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Precipitation falls in these two forms: Solid / Liquid / Gas I’ll give you 77 and read the pdf

Answers

Answer:

It falls in Liquid and Solid.

Explanation:

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