Is this correct ? I need help

Is This Correct ? I Need Help

Answers

Answer 1

Yes i have done that before on paper but yes its right


Related Questions

What type of ionic compound is CO3?

Answers

Answer:

Carbon Trioxide

Explanation:

Its a Carbonite Ion which is also known as a polyatomic ion

What is the pH of a 0.30 M solution of Ca(OH)2?

Answers

Explanation:

30 to the second power

4. What is the volume of 6.5 moles of Helium at STP?
|

Answers

Answer:

Volume of 6.5 moles of Helium at STP is 145.6954 L

Explanation:

As we know

[tex]pV = nRT[/tex]

At STP, temperature is  273.15 K  and pressure is  1 atm

n is the number of moles which is equal to 6.5

R is the gas constant = 0.08206 L atm/K mol

Substituting the given values in above equation, we get -

[tex]1 * V = 6.5 * 0.08206 * 273.15\\V = 145.6954[/tex]Liters

Volume of 6.5 moles of Helium at STP is 145.6954 L

What makes an atom stable?
a. Having the nucleus in the center
b. Being very small
c. Being neutral
d. Having the right number of protons and neutrons

Answers

D

Explanation:
An atom is stable if the forces among the particles that makeup the nucleus are balanced. An atom is unstable (radioactive) if these forces are unbalanced; if the nucleus has an excess of internal energy. Instability of an atom's nucleus may result from an excess of either neutrons or protons.

an archer releases an arrow toward a Target the arrow travels 166 m in 2 seconds what is the speed of the arrow​

Answers

the speed of arrow is 83m/per second

that means

83metres = 1 second

The arrow would cover the distance of 83 metres in 1 second

may this helps you

bye

What is the empirical formula for a compound that has 1.5 moles of copper and 0.5 moles of phosphorus?

Answers

Answer:

[tex]Cu_{3}P[/tex]

Explanation:

usually, the first step is to calculate the moles but since that is already given in the question we can move onto the next step

least molar ratio:

Cu =  [tex]\frac{1.5}{0.5}[/tex] = 3

P = [tex]\frac{0.5}{0.5}[/tex] = 1

thus, empirical formula = [tex]Cu_{3}P[/tex]

The empirical formula for a compound that has 1.5 moles of copper and 0.5 moles of phosphorus is Cu₃P.

What is the empirical formula?

Empirical formula of any compound gives idea about the number of constituents particles present in that compound by mentioning the ration.

In the question, given that:

Moles of copper = 1.5 moles

Moles of phophorous = 0.5 moles

Now we divide the given moles by the smallest number to get the ration number as follow:
Cu  :  P

1.5/0.5  :  0.5/0.5

3  :  1

Hence, required empirical formula is Cu₃P.

To know more about empirical formula, visit the below link:

https://brainly.com/question/1603500

4Fe+3O2 →2Fe2O3

80.0 grams of iron are reacted with 50.0 grams of oxygen gas. Which of these reactants are the limiting reactant, and how many grams of iron (III) oxide would be produced?

Answers

Answer:

FFe

2

O

3

(

s

)

+

3

CO

(

g

)

2

Fe

(

s

)

+

3

CO

2

(

g

Explanation:

A pool float was filled with air to capacity in the middle of a hot day. The next morning the pool float looked different yet no gas escaped or entered the float. Describe what you think the float looked like in the morning and why it occurred.

Answers

Answer:

The pool float looked would have looked deflated the next morning.

Explanation:

When temperature decreases the volume decreases

Answer:

The pool float most likely looked a little deflated or pushed in

Explanation:

The pool float most likely looked a little deflated or pushed in. This is because during the night temperatures most likely dropped. These cold temperatures during the night would have caused the air molecules inside the pool float to come closer together which would cause there to be more excess space inside the pool float. Therefore, allowing it to collapse into itself. This would be far worse if the float was filled with helium or another gas other than O2.

How can sound waves be used to put out fire

Answers

The acoustic extinguisher works by using sound waves—a type of pressure wave—to push oxygen away from the source of a flame and spread it over a larger surface area. These actions break the fire combustion triangle made up of heat, fuel, and oxygen, the three elements required for a fire to burn.

What is a peer review? *
A. A summary of results from several different experiments
B. A presentation of scientific ideas
C. group of scientists that analyze scientific experiments
D. The errors in an experiment

Answers

Answer: Hewo, there! your Answer is Below

C. group of scientists that analyze scientific experiments

Explanation:

the process of someone reading, checking, and giving his or her opinion about something that has been written by another scientist or expert working in the same subject area, or a piece of work in which this is done: All these papers have been published after being subjected to peer review.

Hope this Helps you !!!

Have a great day!!!

I think the answer is B

How many moles are in 564 grams of copper

Answers

Answer:The answer is 63.546.

Explanation: The answer is 63.546. We assume you are converting between grams Copper and mole. You can view more details on each measurement unit: molecular weight of Copper or mol. The molecular formula for Copper is Cu. The SI base unit for amount of substance is the mole. 1 grams Copper is equal to 0.015736631731344 mole

Answer:

5.64 of copper

Explanation:

Given: 564 grams of copper

To find: in copper

Solution: If 1 grams Copper = 0.01 mole,

Then, 564 grams = multiply 564 and 0.01 mole

564 × 0.01 = 5.64

Therefore, there are 5.64 of copper in 564 grams

A car with a mass of 3,500lbs accelerates negatively from 35m/s to 8m/s in 8s. What is the
car's negative acceleration?

Answers

Answer:

[tex]a=-3.37\ m/s^2[/tex]

Explanation:

Given that,

A car accelerates negatively from 35m/s to 8m/s in 8s.

We need to find the car's acceleration.

Initial speed, u = 35 m/s

Final speed, v = 8 m/s

Time, t = 8 s

The acceleration of an object is equal to the rate of change of velocity. So,

[tex]a=\dfrac{v-u}{t}[/tex]

Put all the values,

[tex]a=\dfrac{8-35}{8}\\\\a=-3.37\ m/s^2[/tex]

So, the acceleration of the car is equal to [tex]-3.37\ m/s^2[/tex].


Calculate the molar mass of HCI.

Answers

36.458 is your molar mass
1.008(H) plus (Cl)35.453= 36.458

pls help and show work!!!

Answers

Answer:

44.9g

Explanation:

You have to convert grams of CH4 to moles, use the mole-to-mole ratio of CH4 to water, and convert back to grams.

(20.0g CH4)(1 mol CH4/16.04g)(2 mol H2O/1 mol CH4)(18.01 g H2O/ 1 mol) = 44.9127 g

Hope this helps!

My teacher showed me an easier way of doing it if you don’t understand the equation comment and I can explain more of how to do it if you want

How are Earth;s Days, Years, and Season’s related to the way Earth moves in Space?

Answers

Occurs because it’s axis is titled as it goes around the sun. Earths axis is always titled at an angle of 23.5

You heat 100 mL of water and 1000 mL of water using 40,000 joules of energy. What would be the outcome of this experiment? *
A. The 100 mL of water would be a higher temperature than the 1,000 mL of water.
B. The 100 mL of water would be a lower temperature than the 1,000 mL of water.
C. They would both be the same temperature.
D. There is not enough information

Answers

Answer:

A. The 100 mL of water would be a higher temperature than the 1,000 mL of water.

Explanation:

Since the volume of water affects temperature, when the volume increases this results in a lower temperature. This means that the water with the smaller volume will have a higher temperature.

2 H2 (g) + O2 (g) --> 2 H2O (l)

How many moles of hydrogen gas do you need to make 2 moles of liquid water?

Answers

Answer:

2H2(g]+O2(g]→2H2O(l]]. Notice that the reaction requires 2 moles of hydrogen gas and 1

Explanation:

A box slides with an initial speed of 4.0 towards a spring on a frictionless horizontal surface. When the box
S
N
hits a spring with spring constant k = 150 the spring compresses by 0.30 m.
m
m
M
What is the mass of the box?

Answers

Answer: .84kg

Explanation:

Khan academy

A box slides with an initial speed of 4.0 kg m/s towards a spring on a frictionless horizontal surface. When the box hits a spring with spring constant k = 150 N/m, the spring compresses by 0.30 m.

What is the mass of the box?

Answer: 0.54 kg

Which substances are compounds? Please help

Answers

Answer:

1 and 3

Explanation:

oh this one lol,, hope it helps

Answer:

1 and 3

Explanation:

hope this helps :)

What is the normality of a 2.0 M NaOH solution?

Answers

Answer:

Normality= molarityX total POSITIVE oxidation number of solute Solvent=substance present in the greatest amount Solute= all other substances in the solution +1 (1 na+) is the total POSITIVE oxidation number of NaOH 2.0X1= 2.0 N=2.0

Explanation:

I had the same question on one of my assignments earlier

Which of the following is a property of elements?
O
Elements have at least two different types of atoms.
Elements have their own individual characteristic properties.
Elements are can be separated from one another.
Elements have the ability to change into a different element.

Answers

Elements have their own individual characteristic properties.

How many grams of NaOH are produced from 2.1g of Na2O?
Na2O + H20 --> 2NaOH

Answers

Answer:

2.72g

Explanation:

The balanced equation of this reaction is given as follows:

Na2O + H20 --> 2NaOH

Based on this balanced equation, 1 mole of Na2O will produce 2 moles of NaOH.

First, we need to convert mass of Na2O into moles by using the formula;

mole = mass/molar mass

Molar mass of Na2O = 23(2) + 16

= 46 + 16

= 62g/mol

mole = 2.1g/62g/mol

mole of Na2O = 0.034mol

Hence, if 1 mole of Na2O will produce 2 moles of NaOH.

Then, 0.034mol of Na2O will produce (0.034 × 2) = 0.068mol of NaOH.

To convert mole of NaOH to mass, we use;

mole = mass/molar mass

Molar mass of NaOH = 23 + 16 + 1 = 40g/mol

0.068 = mass/40

mass of NaOH produced = 2.72g.

Horticulture 100 POINTS Hurry
Which of the following is an example of an indirect expense?
A. corn oil
B. animal fodder
C. export commodity
D. snack foods

Answers

Answer:

B!

Explanation:

Answer:

i know im late but i just really want the points. the answer is b.

Explanation:

Please please help me!! It needs to be turned in in a few minutes!

Answers

I think the answer is thermal!
Hope this helps:)
Brainiest please:)

Answer:

D. Thermal

Thermal is another energy the match gives off

Define the term metal ore

Answers

Answer:

Ore is a deposit in Earth's crust of one or more valuable minerals. The most valuable ore deposits contain metals crucial to industry and trade, like copper, gold, and iron

The naturally occurring material from which a mineral or minerals of economic value can be extracted.

What happens to food we eat?

Answers

Answer:

It goes through our digestive system then though our bladder.

Answer: When we eat the food gets digested.

Explanation: Once filled with food, the stomach grinds and churns the food to break it down into small particles. It then pushes the small particles of food into the first part of the small intestine, called the duodenum. The small intestine is where most of the digestion and absorption of our food takes place.

6. Find the number of molecules in 33.6 L of co, at STP? What is the name
of this compound?
!!!!!!PLEASE HELP!!!!!!!!!!

Answers

Question 6 says CO2, not CO.

At STP, one mole of any gas occupies 22.4 L. So, at STP, 33.6 L of our gas contains (33.6 L)/(22.4 L/mol) = 1.5 moles.

One mole of any substance contains 6.022 × 10²³ particles, or in this case, molecules. So 1.5 moles contains (1.5 moles)(6.022 × 10²³ molecules/mole) = 9.03 × 10²³ molecules.

As you can see, in this case it doesn’t matter what the identity of the gas is. But it does matter when it comes to naming. If the substance is CO, as you’ve typed, its name is carbon monoxide. If the substance is CO2 as it’s presented in the image, then its name is carbon dioxide.

An electric car has a mass of 2,000 kg. the engine is producing a force of 3,500 N to move the vehicle forward,but it must overcome air friction equal to 500 N
What is the acceleration of the electric car m/s2?
record your answer and fill in below

Answers

Answer:

1.5 m/s²

Explanation:

From the diagram,

F-F' = ma............... Equation 1

Where F = Forward force of the vehicle, F' = Frictional force, m = mass of the electric car, a = acceleration of the car.

make a the subject of the equation

a = (F-F')/m........... Equation2

Given: F = 3500 N, F' = 500 N, m = 2000 kg

Substitute into equation 2

a = (3500-500)/2000

a = 3000/2000

a = 1.5 m/s²

2-ciclopropilpropano​

Answers

Answer:

cool

Explanation:

what is molarity ? also write its formula ?​

Answers

Answer:

Definition:

Molarity of a given solution is defined as the total number of moles of solute per litre of solution. The molality of a solution is dependent on the changes in physical properties of the system such as pressure and temperature as unlike mass, the volume of the system changes with the change in physical conditions of the system. Molarity is represented by M, which is termed as molar. One molar is the molarity of a solution where one gram of solute is dissolved in a litre of solution. As we know, in a solution, the solvent and solute blend to form a solution, hence, the total volume of the solution is taken.

Formula :

[tex]m \: = \frac{n}{v} [/tex]

Where,

m = molar concentration

n = moles of solute

v = litres of solution.

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