1. How many mL of copper (II) sulfate of a 2.5M stock solution is needed to make 250 mL of 0.2M solution?​

Answers

Answer 1

Answer:

20ml

Explanation:

using the formula;C1V1=C2V2

2.5×V1=0.2×250

2.5V1= 50

V1=50/2.5

V1=20L


Related Questions

1. The skeletal system is responsible for all of the following except:

a. Producing red and white blood cells

b. Providing oxygen to cells and removing carbon dioxide waste
Movement of the body

C. Movement of the body

D. Protecting vital organs

Answers

Answer:

B

Explanation:

the Answer is B .

The skeletal system produce blood cells , protect organs and helps the movement of the body .

B providing oxygen to cells and removing carbon dioxide waste.

If equal volumes of 1.0 M HCl and 1.0 M AgNO3 are combined in a beaker, will a solid precipitate form?

Answers

HF had a higher [OH-] than a solution of l.0m HCL.

Difference between simple and fractional distillation.

Answers

Answer:

Simple distillation is the method used to separate substances in mixtures with significantly different boiling points, while fractional distillation is used for mixtures containing chemicals with boiling points close to each other.

30 POINTS How is Gestalt Psychology related to creativity?

Answers

Answer:

Gestalt pioneers contribute rich examples of creative thinking and practice in their writings and in their work

Explanation:

For each of the following acid-base titration combinations , determine the number of moles of the first substance listed that would be the chemically equivalent amount of the second substance.

a. NaOH with 1.0 mol HCL
b. HNO3 with 0.75 mol KOH
c. Ba(OH) with 0.20 mol HF
d. H2SO4 with 0.90 mol Mg(OH)2

Answers

1.0 mol HCl will require 1.0 mol NaOH, 0.75 mol KOH will require 0.75 mol [tex]HNO_3[/tex],  0.20 mol HF will require 0.1 mole [tex]Ba(OH)_2[/tex], and 0.90 mol [tex]Mg(OH)_2[/tex] will require 0.90 mole [tex]H_2SO_4[/tex]

What are mole ratios?

It is the ratio of the chemical components in chemical reactions.

The equation for each of the listed reactions is as follows:

NaOH + HCl ---------> NaCl + [tex]H_2O[/tex][tex]HNO_3 + KOH ----- > KNO_3 + H_2O[/tex][tex]Ba(OH)_2 + 2HF ------ > BaF_2 +2 H_2O[/tex][tex]H_2SO_4 + Mg(OH)_2 ---- > MgSO_4 + 2H_2O[/tex]

The mole ratio of NaOH and HCl is 1:1, that of  [tex]HNO_3[/tex] and KOH is also 1:1, that of  [tex]Ba(OH)_2[/tex] and HF is 1:2, and that of [tex]H_2SO_4[/tex] and [tex]Mg(OH)_2[/tex] is 1:1.

Thus, 1.0 mol HCl will require 1.0 mol NaOH, 0.75 mol KOH will require 0.75 mol [tex]HNO_3[/tex],  0.20 mol HF will require 0.1 mole [tex]Ba(OH)_2[/tex], and 0.90 mol [tex]Mg(OH)_2[/tex] will require 0.90 mole [tex]H_2SO_4[/tex]

More on mole ratios can be found here: https://brainly.com/question/15288923

#SPJ1

Would a hurricane more likely remain a hurricane if it reached point A or point B? Explain your answer.

Answers

Answer:

Hurricane will stay hurricane.

Explanation:

(B) Water provides energy

(A) it will die if it's on land

What does homeostasis refer to

Answers

Answer:

Homeostasis, as currently defined, is a self-regulating process by which biological systems maintain stability while adjusting to changing external conditions.

Explanation:

Propose a solution to reduce the risk of flammable methane from concentrating in landfills.

Answers

Given what we know, we can confirm that one possible solution to the problem of flammable methane from concentrating in landfills is to use biosolids.

What are biosolids?

Biosolids are organic matter that are created by recycling waste. These biosolids can act as a cover over landfills. The bacteria present in these solids then use this methane gas to create carbon dioxide gas. Though not ideal, this product is much less harmful to the environment than methane.

Therefore, we can confirm that one possible solution to the problem of flammable methane from concentrating in landfills is to use biosolids.

To learn more about methane gas visit:

https://brainly.com/question/2127750?referrer=searchResults

Scientists are trying to understand the composition of substances on
different planets. Which best describes how scientists are probably working
on this problem?
O A. Scientists share information with other scientists who approach
the problem in the same way so that they get support for their
observations.
O B. Scientists study the problem in the same way because they have
similar backgrounds and share information with each other.
O C. Scientists with different perspectives approach the problem in
various ways, but they all make observations and look for
patterns.
O D. Scientists with the same perspectives use similar experiments so
that they can compare results and draw the same conclusions.

Answers

Answer:

I would say C

Explanation:

Which two wire properties would provide the greatest resistance to the flow of a current? short, thin long, thin hot, thick cool, thick

Answers

The two properties which provide the greatest resistance to the flow of a current are the long and thin wires.

What is resistance?

Resistance is the quantity which define the flow of current from any wire and it is represented as:

R ∝ l/A, where

l = length of wire

A = cross section of wire

From the relation it is clear that resistance is high in long wire and thin wire.

So, required properties are long and thin.

To know more about resistance, visit the below link:
https://brainly.com/question/17563681

Answer:

B.

Explanation:

the answer is the second option.

In order to change the liquid milk into a solid, what had to happen

Answers

Freeze it in a freezer this will change it from liquid to solid

What does an-ite or-ate ending in a polvatomic ion mean?

Answers

Answer:

An -ite or -ate ending means a polyatomic ion that includes oxygen is in the formula.

ate = one more O than -ite

Explanation:

Example:

NO2 is nitrite

NO3 is nitrate

You can see that the molecules are made of the same elements, however they have more or less of one of the elements (i.e. oxygen).

These suffices are used in oxygen compounds

Take example of Sulphur

SO_2=sulphiteSO_3=sulphate

ite means 2 and ate means 3

What is a molecule?
A. A particle with two or more atoms bonded covalently
B. A substance combining two or more elements
C. The smallest unit of an element
D. An atom with a positive or negative charge

Answers

Answer:

I believe your answer would be, "A" A particle with two or more atoms bonded covalently.

Explanation:

The definition of a molecule;

A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.

What gas is a byproduct of agricultural production?.

Answers

Answer:

Explanation:

Animal waste is broken down, producing methane gas

A sample of thulium-171 has a mass of 0.4055 g and is radioactive. How much of this sample if left after 6 half-lives

Answers

Answer:

6.336 mg

Explanation:

.4055 x (1/2)^6 = .006336 gm

A 687.6 g sample of aluminum was heated by applying 8,284.4 J of energy. If the initial temperature of the aluminum was 23.1 oC, what was the final temperature of the sample, in degrees Celsius

Answers

The final temperature of the sample, in degrees Celsius is 36.6 °C

Heat capacity of a substance

From the question, we are to determine the final temperature of the sample

From the formula for heat capacity, we have that

Q = mcΔT

Where Q is the heat energy

m is the mass

c is the specific heat capacity of the subtance

ΔT is the change in temperature ([tex]\Delta T= T_{f} -T_{i}[/tex])

From the given information

m = 687.6 g

Q = 8284.4 J

[tex]T_{i}[/tex] = 23.1 °C

Putting the parameters into the equation, we get

[tex]8284.4 = 687.6 \times 0.89 \times (T_{f} -23.1)[/tex]

NOTE: Specific heat capacity of aluminum = 0.89 J/ g °C

Then,

[tex]8284.4 = 611.964 \times (T_{f} -23.1)[/tex]

[tex](T_{f} -23.1)= \frac{8284.4}{611.964}[/tex]

[tex](T_{f} -23.1)= 13.5[/tex]

[tex]T_{f} = 13.5 + 23.1[/tex]

[tex]T_{f} = 36.6 \ ^\circ C[/tex]

Hence, the final temperature of the sample, in degrees Celsius is 36.6 °C

Learn more on Heat capacity of a substance here: https://brainly.com/question/13439286

What is the name of the acid with the formula h3po3.

Answers

Answer:

phosphorous acid

Explanation:

PO4 (phsophate) is a polyatomic, so when the subscript changes, so does the name and it becomes phosphite (one less oxygen atom)

if the name of the polyatomic ends in ite, the ending of the acid name becomes ous making it phosphorous acid.

You don't need to worry about the hydrogen in the naming process because it is an oxyacid, where you only really worry about the polyatomic (acid tells you there is hydrogen)

At what temperature would 2. 10 moles of N2 gas have a pressure of 2. 25 ATM and in 25. 0 L tank?

Answers

Answer:

About 326 K.

Explanation:

Recall the ideal gas law:
[tex]\displaystyle PV = nRT[/tex]

Where P is the pressure, V is the volume, n is the number of moles, R is the universal gas constant, and T is the temperature.

Because we want to solve for temperature T:

[tex]\displaystyle T = \frac{PV}{nR}[/tex]

Substitute and evaluate. R has a value of 0.08206 L-atm/mol-K:
[tex]\displaystyle \begin{aligned} T & = \frac{(2.25\text{ atm})(25.0\text{ L})}{(2.10\text{ mol})\left(\dfrac{0.08206\text{ L - atm}}{\text{mol - K}}\right)} \\ \\ & = 326\text{ K}\end{aligned}[/tex]

In conclusion, the temperature of the gas will be about 326 K.

what is the number and kind of element of C3H8NCl

Answers

There are four kinds of elements i.e carbon, hydrogen, nitrogen, and chlorine. The compound name is allylamine Hydrochloride.

What is an allyl group?

An allyl group is a substituent with the structural formula

[tex]H_2C=CH - CH_2R[/tex], where R is the rest of the molecule.

There are four kinds of elements i.e carbon, hydrogen, nitrogen, and chlorine. The compound name is allylamine Hydrochloride.

Learn more about  an allyl group here:

https://brainly.com/question/25883507

#SPJ1

Which property of water contributes most to the ability of fish in lakes to survive very cold winters?.

Answers

Answer:

And that means fish must be able to survive down here. This is due to a special property of water: the elasticity of H2O. We know that when the temperature sinks below freezing, water first contracts and then expands as it begins to turn to ice. Ice, being lighter than water, floats.

Explanation:

The property of water that allows fish to survive in a lake that is frozen over is the fact that ice is less dense than liquid water.

How many valence electrons does a neutral atom of boron have?.

Answers

Answer:

3

Hope it helpz~

please mark me as brainliest

What is the hydroxide ion concentration of a solution with a hydrogen ion concentration of 7.58 × 10-10 M?

Answers

p
H

4

Explanation:
p
H
=

log
10
[
H
3
O
+
]
.
We are given that
[
H
3
O
+
]
=
7.10
×
10

5

m
o
l

L

1
.
And thus
p
H
=

log
10
(
7.10
×
10

5
)

4

What is the total number of atoms in 0. 26mol of glucose, (C6H12O6)

Answers

Answer:

the answer is 6 atoms

1. A hydrocarbon with this formula C4H6 is what?
a. indeterminate
b. s unstable
c. is somewhat reactive
d. is chemically inert
2. Why does carbon form covalent bonds?

a. It has the ability to release 4 electrons to another atom.
b. It has the ability to pull 4 electrons from another atom.
c. It has a strong electronegativity.
d. It will usually bond to multiple atoms which can provide a total of 4 additional electrons.

Answers

₹1

C_4H_6

The general rule is C_n H_2n-2

(4,2(4)-2=8-2=6)

It's Butyne and contains tripple bond

Is unstableHighly reactive inorder to break pi bond .Chemically active

Option A

#2

It has strong electronegativity

Carbon can both donate and accept 4 electrons but in practical it can't do because it requires so huge amount of energyCarbon has highest catenation property in world.

Question 1 (1 point)


What are examples of wetlands?


Choose all that apply.


Question 1 options:


estuaries



wet meadows



marshes



bogs


Question 2 (1 point)

Estuaries are the place where rivers flow into the sea, and the freshwater they contain meets and mixes with salty seawater.


Question 2 options:

True

False

Question 3 (1 point)

_________ are special features or body parts that living things use to help them survive in a biome.


Question 3 options:


rivers



habitats



biomes



adaptations


Question 4 (1 point)

Freshwater biomes depend on the ___________.


Question 4 options:


water cycle



nitrogen cycle



phosphorus cycle



carbon cycle


Question 5 (1 point)

River plants have to cope with moving water. Plants, like eelgrass, have short wide leaves so they don't get washed away.


Question 5 options:

True

False

Answers

Answer: Q1: Wet meadows, & Marshes

              Q2: True

              Q3: Habitats

              Q4: Water cycle

              Q5: True

Hope this helps & have a blessed day. :)

Which balances the equation mg o2 → mgo? mg 2o2 → 4mgo 2mg 2o2 → 2mgo 2mg o2 → 2mgo 2mg 2o2 → 4mgo

Answers

The equation which balances the given chemical reaction between magnesium and oxygen is 2Mg + O₂ → 2MgO.

What is balanced equation?

Balanced equations are those in which all of the entities on both the reactant and product sides are equal.

Given chemical reaction:

Mg + O₂ → MgO

Above reaction is not balanced as number of oxygens are not equal on both sides.

Mg + 2O₂ → 4MgO

Because the amount of magnesium atoms is not equal, this is not a balanced equation.

2Mg + 2O₂ → 2MgO

Because the amount of oxygen atoms is not equal, this is not a balanced equation.

2Mg + O₂ → 2MgO

This is a balanced equation as number of each atoms are equal on both sides.

2Mg + 2O₂ → 4MgO

Because the amount of magnesium atoms is not equal, this is not a balanced equation.

Hence balanced equation is 2Mg + O₂ → 2MgO.

To know more about balanced equations, visit the below link:

https://brainly.com/question/26313963

How to take off acrylic nails at home with acetone?.

Answers

You use a cotton swab or ball and rub your nails off

How are proton , neutron and electron arranged in an atom

Answers

The proton and neutron are together in the center of the atom called the nucleus. The electrons are placed in the electron cloud which surrounds the nucleus, each electron is placed in a ring that can only hold a certain number of electrons.

Elisa was walking through her neighborhood one afternoon and came upon a cat that was stuck under a fallen tree branch. The branch was large and heavy, but Elisa was able to lift it and free the cat.

Which gland helped Elisa to lift the branch?

thymus
pancreas
ovary
adrenal

Answers

Based on this information, the gland that helped Elisa to lift the branch is the adrenal gland.

What is the adrenal gland?

They are two small organs responsible for secreting hormones such as cortisol, adrenaline or noradrenaline into the bloodstream.

These hormones have to do with how the body responds to stress to help the body get a boost of energy to better handle an emergency situation, and some are vital for survival.

Therefore, we can conclude that based on this information, the gland that helped Elisa to lift the branch is the adrenal gland.

Learn more about the adrenal gland here: https://brainly.com/question/23487477

Answer:

D- Adrenal

Explanation:

1 mole of H20 has the same mass as 1 mole of 02 true or false.

Answers

true
……………need more charafters lsosksjdjd
Other Questions
Consider the following two quantities:Quantity A:The slope of graphed line.Quantity B:The y-value of the graphed lines y-intercept.Use the graph of the line K to decide which of the following statement is true?a) Quantity A is greaterb) Quantity B is greaterc) The two quantities are equald) The relationship cannot be determined from the indicated information. Can someone help me please? 4. In Cars Without Gasoline Are Here the author claims that alternative technologies will make cars better for consumers, and supports that claim by citing the benefits of each type of alternative technology. Based on the information in Are Green Cars Really All That Green?, how sound is the authors reasoning in the first passage? In a right triangle, sin() = 0.292. If the hypotenuse of the triangle has a length of 17.5 cm, what is the length of the side adjacent to angle . Note: You will also need to use the Pythagorean theorem to answer this question.16.7 cm5.1 cm11.4 cm4.1 cm There are 2 types of worms: worms that eat at night (nocturnal) and worms that eat during the day (diurnal). The birds eat during the day and seem to be eating ONLY the diurnal worms. The nocturnal worms are in their burrows during this time. 1. Identify a type of variation in the worms. 2. Which variation is most favorable?3. In 50 years, what will natural selection have most likely done for the worms? (Hint: What type of worm will be the most common. )4. What adaptations might occur in the birds in 100 years? If your co-workers make long-distance calls on company time and at company expense, you might view that behavior as acceptable and ethical because everybody does it. What is the factor affecting the ethical behavior here The substance known as antabuse may be combined with alcohol as a form of __________ to help curtail alcohol addiction. a. aversion therapy b. systematic desensitization c. cognitive therapy d. bilateral cingulotomy please select the best answer from the choices provided a b c d please help i have been stuck on this for almost a hour how the dichotomous key can help you identify an organisms? Is this statement true or false? hoping that the yankees would beg for peace if he could beat them on their home ground, general lee decided to move the fighting north. true false 11] You buy a house for $175,000. The economy goesdown and your house is losing value at 4% semi-annually.How much is your house worth in 5 years? Which of the following are controversies over water usage in the United States? Select the three correct answers.(2 points)a. whether dams increase the salt level of waterb. whether people should drink bottled or tap waterc. whether people should build dams on riversd. whether there are hidden costs to tap watere. whether water treatment should be privatizedf. whether dams impact the volume of rivers Despite Christians being given the keys to the Kingdom, they have no more power than non-Christians. Do you agree or disagree? Which word would most likely be used to describe an situation in which someone is well known for doing bad things? question 9 options: infamy graciousness righteousness hindrance Math Homework Question. To estimate the number of students in your school who play a sport outside of school, you decide to survey the players on the boys' baseball team. A student wants to model the process of translation that occurs in a cell as part of gene expression. When planning and organizingthe materials to use in the model, the student finds the items shown in the table. Evaluate the items and select the ones that thestudent needs to appropriately model the process of translation in a cell. Select ALL that apply.A)clothespin)B)paperclip chainthe single string Identify the quadrants in following coordinate planeI NEED ANWSER FAST!!!!! A cone has a volume of 923.16 cubic meters and a height of 18 meters. What is its radius? the diagram shows a right angled triangle.what is the value of h