Which one is it? Please help

Which One Is It? Please Help

Answers

Answer 1
Chemical properties can only be tested if you change the substance
Answer 2

Answer:

Chemical properties can be tested without changing the substance

Explanation:


Related Questions

Do liquids have higher coefficients of expansion than solids do

Answers

Answer: yes they do.

Explanation:

I'm tryna get more points because my other account got blocked for the next 48 hours.

(Don't be mad at me please)

What are three examples of acid-base reactions in cooking

Answers

Answer:

Lemon juice baking soda and vinegar

Explanation:

Which of the following did Antoine Lavoisier correctly characterize as an element? light silicone dioxide mercury

Answers

Answer: mercury

Explanation: I looked up the answer to your question.

Answer:

Mercury

Explanation:

I did this question and I got it right.

You are given the reaction Cu + HNO3 Cu(NO3)2 + NO + H2O complete the final balanced equation based on half-reactions

Answers

The balanced equation based on half-reactions is 2Cu + 8HNO3 + 6H+ -> 2Cu(NO3)2 + 2NO + 4H2O.

How to determine the balanced equation based on half-reactions

To complete the balanced equation for the given reaction Cu + HNO3 -> Cu(NO3)2 + NO + H2O using half-reactions, we need to break down the overall reaction into separate oxidation and reduction half-reactions.

1. Oxidation Half-Reaction:

Cu -> Cu2+ + 2e-

In this step, copper (Cu) is oxidized, losing two electrons to form copper(II) ions (Cu2+).

2. Reduction Half-Reaction:

HNO3 + 3H+ + 2e- -> NO + 2H2O

In this step, nitric acid (HNO3) is reduced, gaining two electrons to form nitric oxide (NO) and water (H2O).

Now, to balance the half-reactions, we need to make sure that the number of electrons gained in the reduction half-reaction is equal to the number of electrons lost in the oxidation half-reaction. In this case, we can achieve this by multiplying the oxidation half-reaction by two.

Balanced Half-Reactions:

Oxidation: 2Cu -> 2Cu2+ + 4e-

Reduction: HNO3 + 3H+ + 2e- -> NO + 2H2O

Finally, we can combine the balanced half-reactions to obtain the balanced equation for the overall reaction:

2Cu + 8HNO3 + 6H+ -> 2Cu(NO3)2 + 2NO + 4H2O

Therefore, the balanced equation based on half-reactions is 2Cu + 8HNO3 + 6H+ -> 2Cu(NO3)2 + 2NO + 4H2O.

Learn more about oxidation at https://brainly.com/question/25551544

#SPJ6

how many number of electrons are in aluminium and nitrogen in their free state?​

Answers

Answer:

MRCORRECT has answered the question

Explanation:

13 electrons

So... for the element of ALUMINUM, you already know that the atomic number tells you the number of electrons. That means there are 13 electrons in a aluminum atom. you can see there are two electrons in shell one, eight in shell two, and three in shell three.

7 electrons

So... for the element of NITROGEN, you already know that the atomic number tells you the number of electrons. That means there are 7 electrons in a nitrogen atom. Looking at the picture, you can see there are two electrons in shell one and five in shell two.

Complete and balance this neutralization reaction: HNO3 + Al(OH)3

Answers

Answer:

Al(OH)3 + HNO3 = Al(NO3)3 + H2O - Chemical Equation Balancer.

Explanation:

does temperature and pressure affect the solubilty of any solute

Answers

Answer:

Yes very much so, especially gases

Explanation:

Solubility of gases decrease with increasing pressure. Be familiar with Henry's Law.

- Hope that helps! Please let me know if you need further explanation.

Answer:

Yes, it does.

(02.02 MC)
How is Earth's surface most likely to change in a place that experiences strong sand storms?

Answers

Answer:

Mechanical weathering will cause wearing down of rocks.

Explanation:

All the other choices aren't suitable for a dry climate where sand storms occur.

Write the full symbol for the isotope of oxygen having 8 neutrons.​

Answers

Answer:

Isotopes are forms of a chemical element that have the same atomic number but differ in mass. 16O → 8 protons + 8 neutrons; a “light” oxygen); The relative amounts are expressed as either 18O/16O or δ 18O Oxygen - 18 (aka 18O → 8 protons + 10 neutrons; a “heavy” oxygen).

ILL GIVE YOU BRAINLIST * have to get it right * !!! Although individual body systems can perform specific functions, they depend on one another and work together for the good of the entire organism.
Which of the following provides the best evidence that the digestive system and the muscular system work together to carry out their functions?

Answers

I think it might be A muscles help move nutrients through the body to the stomach

How many moles of H2 are needed to produce 18 moles NH3 in the reaction below?
N2 + 3 H2 —> 2 NH3

Answers

Answer:

27 moles of H₂

Explanation:

Equation of reaction:

N₂ + 3H₂ → 2NH₃

From the equation of reaction,

3 moles of H₂ is required to produce 2 moles of NH₃

3 moles H₂ = 2 moles of NH₃

X moles of H₂ = 18 moles of NH₃

X = (3 * 18) / 2

X = 27 moles of H₂

27 moles of H₂ is required to produce 18 moles of NH₃

3 hazards that occur in teaching and learning of science

Answers

Acid and nuclear technology that occur in the process of the mitochondria similar to like cancer

1. Calculate the molarity of 35g of calcium chloride (CaCl2) that is dissolved in 850ml of water. (Calculate moles first)

a. 0.27M
b. 0.38M
c. 0.32M
d. 0.80M

2. Calculate the molarity of 90g of copper sulfate (CuSO4) when dissolved in 5 L of water.

a. 0.112M
b. 2.8M
c. 0.56M
d. 0.50M

3. What is the molarity of NaOH if 0.70 moles are dissolved in 250 ml of water?

a. 175,000M
b. 2.8M
c. 0.175M
d. 4M

4. How many moles of Lithium oxide (Li20) are in 2 L of solution with a molarity of 2.0M?

a. 1 mole
b. 2 moles
c. 0.2 moles
d. 4 moles

5. How many moles of NaCl are in 7.5 L of 0.5M?

a. 3.75 moles
b. 15 moles
c. 0.066 moles
d. 2.5 moles​

Answers

Answer:

yo I got same question do u know it

Which of these conclusions is correct about P and Q in the diagram?

P represents the land and Q represents the ocean.
P represents the ocean and Q represents the land.
P represents the land and Q represents the atmosphere.
P represents the atmosphere and Q represents the ocean.

Answers

P represents the atmosphere and Q represents the ocean.

Answer:

P represents the atmosphere and Q represents the ocean.

Explanation:

what happens when light is not spread out

Answers

Answer:

Spreading out a wave over a larger area just causes the wave strength to weaken, but does not cause gaps to form. Therefore, if you look at photons as waves, spatial gaps never form in light as it travels through free space, no matter how dim it gets.Spreading out a wave over a larger area just causes the wave strength to weaken, but does not cause gaps to form. Therefore, if you look at photons as waves, spatial gaps never form in light as it travels through free space, no matter how dim it gets

Explanation:

How many grams of H20 will be formed when 32.0 g H2 reacts with 16.0 g
O2? *
2H2 + O2 + 2H2O
9.00 g
16.0 g
18.0 g
32.0g

Answers

Answer:

18.0 g

Explanation:

M(H2) = 2.0 g/mol

32.0g * 1 mol/2 g= 16 mol H2

M(O2) = 32 g/mol

16.0 g * 1mol/32 g= 0.5 mol O2

                                      2H2 + O2 ---> 2H2O

from reaction              2 mol    1 mol

given                         16 mol     0.5 mol

We see that O2 is a limiting reactant.

                                    2H2 + O2 +-------> 2H2O

from reaction                         1 mol            2 mol

given                                      0.5 mol        x mol

x =(0.5*2)/1= 1 mol H2O

M(H2O)= 18 g/mol

18 g/mol* 1 mol = 18 g H2O

Calculate the molarity of a nitric acid solution if 38 ml of the solution is neutralized by 16 ml of 0.25 M barium hydroxide solution. The balanced equation for the reaction is

Answers

Answer:

l

Explanation:

The element hydrogen has the highest specific heat of all elements. At room temperature, hydrogen's specific heat is 14.30 J/g •°C. If the temperature of a 340.0 g sample of hydrogen is to be raised by 30°C, how much energy will have to be added to the hydrogen?

Answers

Answer:

THE ENERGY NEEDED TO BE ADDED TO RAISE THE TEMPERATURE BY 30°C IS 145, 860 J

Explanation:

The energy needed can be calculated by using the heat formula, which is;

Heat = m c ΔT

m = mass of the hydrogen =  340 g

c = specific heat capacity of hydrogen at room temperature = 14.30 J/g°C

ΔT = change in temperature = 30°C

Heat =?

So therefore,

Heat = 340 * 14.30 * 30

Heat = 145860 J

The energy needed to be added to the hydrogen to bring the mass of 340 g to an increased temperature of 30°C is 145, 860 J or 145.86kJ

Which of the following is an example of the endocrine system maintaining homeostasis?

Group of answer choices

Detecting a pain stimulus and sending a signal to the spinal cord to perform an automatic response

Producing an excessive amount of hormones in the blood and not sending a signal to stop production

Releasing insulin to decrease blood sugar and releasing glucagon to increase blood sugar

Using sense organs to get information about the outside world and direct an appropriate body response

Answers

Answer:Releasing insulin to decrease blood sugar and releasing glucagon to increase blood sugar

Explanation: homoestasis is the process by which the body keep it's internal environment constant, regardless of change in the external environment. The human body has a normal range in which it's system operates and it uses homoestasis to keep these at constant.

Homeostasis could be positive or negative. It usually involves a sensor which detects the changes in the body and passes the information to the control center, a control center which receive information from the sensor and sends signals to the effectors and the effector which acts on the information sent by the control center to effect normalcy.

In this case, when a person eats food,he gets glucose. Blood sugar most be kept at constant so the endocrine system release the hormone insulin. Insulin helps to convert glucose to glycogen, which is the form it can be stored in the liver

When the blood sugar levels is low, the brain which is the control center causes glucagon to be released . This hormone converts glycogen to glucose

Answer:

Answer:Releasing insulin to decrease blood sugar and releasing glucagon to increase blood sugar

Explanation:

How many times more acidic is a pH of 2 than a PH of 7?

Answers

Answer: 10 times more

Explanation:

How many senses does the human body have?
O A. 3
B. 5

Answers

Answer:

B

Explanation:

sight, hearing, smell, taste and touch

Answer:

Most easiest answer..

There are 5 senses in human body.☺️


1.

__________ are the most organized state of matter.

Solids

Liquids

Gases

2.

States of matter change when ________ is added or removed.

Plasma

Energy

3.

Which state of matter has the most movement of its particles?

Solid

Liquid

Gas

Answers

1. Solids. The particles in a solid are tightly packed together and can only vibrate from their fixed positions.
2. Energy. Adding in energy makes the particles of a substance vibrate faster, breaking the forces of attraction between them and removing energy makes the particles vibrate slower and forces of attraction forms between the particles.
3. Gas. The forces of attraction between the particles of a gas are very weak. The particles randomly and quickly move around in all directions.

Solids are the most organized state of matter. States of matter change when energy is added or removed. Gas is the state of matter has the most movement of its particles.

What are the states of matter?

The states of matter are the different forms of the matter in which it can exist. They are solids, liquids and gases. Solids are the states of matter in which molecules are very near to each other. They have fixed shape and volume. Liquids is the states of matter in which molecules are a little far from each other. They have different shape and fixed volume. Gas is the states of matter in which molecules are a very far from each other. They have different shape and different volume.

There are two more states of matter which are called as Plasma, Bose Einstein Condensate.

Plasma have highest energy and Bose Einstein Condensate have lowest energy.

Therefore, Solids are the most organized state of matter. States of matter change when energy is added or removed. Gas is the state of matter has the most movement of its particles.

To learn more about States of matter click:

https://brainly.com/question/29069107

#SPJ3

How many carbon and hydrogen atoms are there?

Answers

Answer:

13 carbon and 24 hydrogen

Explanation:

There are 24 hydrogen atoms.

There are 13 carbon atoms.

The other person is right

PLZZZ HELP CHEM!!!!!!! Easy points!!!!!

Answers

Answer:

H+

Explanation:

Answer:

OH-

Explanation:

An Arrhenius base is any species that increases the concentration of

OH

A 0.050L solution of Ba(OH)2 is neutralized by 0.072L of a 0.55 M HNO3 solution. What is the concentration of the Ba(OH)2 solution?

Answers

Answer:

0.396M

Explanation:

Step 1:

The balanced equation for the reaction. This is given below:

2HNO3 + Ba(OH)2 —> Ba(NO3)2 + 2H2O

From the balanced equation above,

The mole ratio of the acid (nA) = 2

The mole ratio of the base (nB) = 1

Step 2:

Data obtained from the question. This include the following:

Volume of base (Vb) = 0.05L

Concentration of base (Cb) =..?

Volume of acid (Va) = 0.072L

Concentration of acid = 0.55 M

Step 3:

Determination of the concentration of the base, Ba(OH)2.

The concentration of the base, Ba(OH)2 can be obtained as follow:

Cava /CbVb = nA/nB

0.55 x 0.072 / Cb x 0.05 = 2/1

Cross multiply to express in linear form

Cb x 0.05 x 2 = 0.55 x 0.072

Divide both side by 0.05 x 2

Cb = (0.55 x 0.072) / (0.05 x 2)

Cb = 0.396M

Therefore, the concentration of the base, Ba(OH)2 is 0.396M

Calculate the molar mass of ammonium chloride

Answers

Answer:

53.491 g/mol

Explanation:

Create the chemical compound and find each individual element's molar mass. Lastly, add them up.

What does the questions “how much?” and “how many?” have in common?

Answers

They both ask for an amount of something

Analysis: The limiting reactant(s) appeared to be
because

Answers

there is nothing with which it can react

Explanation:

The limiting reactant(s) prevents a reaction from continuing because there is none left.

Why do limiting reactants occur?

Identification of the limiting reactant makes it possible to calculate the theoretical yield of a reaction. The reason there is a limiting reactant is that elements and compounds react according to the mole ratio between them in a balanced chemical equation.

How do you get the limiting reactant?

The reactant that is consumed first and limits the amount of product(s) that can be obtained is the limiting reactant. To identify the limiting reactant, calculate the number of moles of each reactant present and compare this ratio to the mole ratio of the reactants in the balanced chemical equation.

Learn more about Limiting Reactant(s) here

https://brainly.com/question/14225536

#SPJ2

The Sun is a constant supply of energy to Earth.
A. True
B. False

Answers

True.
The sun gives the earth thermal energy, which warmth the planet and effects the weather and the seasons. Also the sun is the beginning of the food chain, because it allows for plants to grow.
We also get our energy either directly or in directly from the sun, either from our food that we eat, or through things like the burning of fossil fuels, which was once plant-matter millions of years ago.

Which is the molar mass of Calcium?

Answers

Answer:

40.078 u

Explanation:

Other Questions
Twenty words were randomly selected from two textbooks. Each set gives the number of letters in each of the twenty words for that textbook.Briefly describe how the word lengths compare between textbook 2 and textbook 1.Briefly describe the variability in the length of words in textbook 2 compared to textbook 1. PLEASE HURRY :( Which countries were members of the Axis Alliance?-Germany-Italy-Japan-Great Britain x 63.4x 96.6x 63.4x 96.6 3. Which of the following represents a function?O (5, 1), (5,2), (5, 3), (5, 4)O (-1,2), (-2, 1), (-1, -2), (-2,-1)O (3, 4), (-3, 2), (3, 8), (5,5)O (2, 3), (4, 3), (-2, -3), (-4,-3) HELP ME PLZ ASAP!!!!! Write the name of the item seen in the picture, What function has zeros at x=10 and x=2 A medical researcher is studying the spread of a virus in a population of 1000 laboratory mice. During any week, there is an 80% probability that an infected mouse will overcome the virus, and during the same week there is a 10% probability that a noninfected mouse will become infected. Three hundred mice are currently infected with the virus. How many will be infected next week and in 3 weeks Who invented the Automoible? 1. Calculate the molarity of 35g of calcium chloride (CaCl2) that is dissolved in 850ml of water. (Calculate moles first)a. 0.27Mb. 0.38Mc. 0.32Md. 0.80M2. Calculate the molarity of 90g of copper sulfate (CuSO4) when dissolved in 5 L of water.a. 0.112Mb. 2.8Mc. 0.56Md. 0.50M3. What is the molarity of NaOH if 0.70 moles are dissolved in 250 ml of water?a. 175,000Mb. 2.8Mc. 0.175Md. 4M4. How many moles of Lithium oxide (Li20) are in 2 L of solution with a molarity of 2.0M?a. 1 moleb. 2 molesc. 0.2 molesd. 4 moles5. How many moles of NaCl are in 7.5 L of 0.5M?a. 3.75 molesb. 15 molesc. 0.066 molesd. 2.5 moles Question: Please Answer The Following 4 Questions Below After Reading The Paragraph. Study: High Incomes Dont Bring You Happiness By Caitlin Kenney 2010 People Often Have Conflicting Ideas About Whether Or Not Money Can Buy Happiness. Some Believe That The Lifestyle That Money Can Offer Is Equivalent To Happiness, While Others Fear That Money Can Lead ...This question hasn't been answered yetAsk an expertPlease answer the following 4 questions below after reading the paragraph.Study: High Incomes Dont Bring You HappinessBy Caitlin Kenney 2010People often have conflicting ideas about whether or not money can buy happiness. Some believe that the lifestyle that money can offer is equivalent to happiness, while others fear that money can lead to greediness that can never be satisfied. In this study, psychologist Daniel Kahneman and economist Angus Deaton seek the answer to this question. As you read, take notes on the different definitions of happiness that exist and how they are affected by money.How much money do you think it would take to make you happy? Would an extra $10,000 a year do it or would it take a $100,000 salary bump to improve your mood?A new study from Princeton economist Angus Deaton and psychologist Daniel Kahneman suggests that number depends on how you define happiness. The authors draw a distinction1 between emotional well-being, the quality of a persons everyday experience such as joy, fascination, anxiety, sadness, anger, and affection and life evaluation a persons thoughts about his or her life (on a longer time scale).Their study of data from the Gallup-Healthways Well-Being Index found that while life evaluations rise steadily with income, emotional well being drops off at about $75,000 a year.Beyond $75,000, money is important for life evaluation, but does nothing for happiness, enjoyment, sadness, or stress. Both factors are important; it is good to have high emotional wellbeing, but it is also good to think your life is going well.According to the most recent census2 data, the median US household income was $52,000 in 2008, with about a third of households making above $75,000.Text-Dependent Questions Directions: For the following questions, choose the best answer or respond in complete sentences.1. PART A: What statement best identifies the central idea of the text?A. Money makes people happy above anything else.B. Emotional wellbeing is solely dependent on wealth.C. Money plays only a very minor role in people's overall happiness.D. Money is able to influence peoples happiness to an extent.2. PART B: Which detail from the text best supports the answer to Part A?A. would it take a $100,000 salary bump to improve your mood? (Paragraph 1)B. Beyond $75,000, money is important for life evaluation, but does nothing for happiness, (Paragraph 4)C. it is good to have high emotional wellbeing, but it is also good to think your life is going well. (Paragraph 4)D. the median US household income was $52,000 in 2008, with about a third of households making above $75,000. (Paragraph 5)3. PART A: What does paragraph 5 suggest about the "emotional wellbeing"? of an individual with the median household income in 2008?A. The average household in the US would be happier with a higher income.B. Only life evaluation would increase with a higher income.C. Some people in the United States make too much money and its harmful to average Americans.D. Increasing the average households income would decrease the countrys overall emotional wellbeing.4. PART B: Which section from the text best supports the answer to Part A?A. number depends on how you define happiness. (Paragraph 2)B. life evaluations rise steadily with income, (Paragraph 3)C. emotional well being drops off at about $75,000 a year. (Paragraph 3)D. Beyond $75,000, money is important for life evaluation, (ParagraphPlease help! what is the solution of this equqtion? 1w= -17 !!15p!!Which statement explains how to calculate the mean of a set of data?ASubtract the smallest from the largest value.B. Add the largest and the smallest values and divide by 2.C. Find the sum of all the values and then divide by the number of values.D. Organize the data from least to greatest and find the value in the middle.E Organize the data from least to greatest and identify which value is repeated the most often. Find the greatest common factor of 24, 40 and 60 Please answer asap ty!! A perfectly competitive firm is a: Group of answer choices price taker, because it must accept the market equilibrium price. price participant, because it can coordinate its pricing decisions with other firms. price maker, because it has the freedom to set the selling price. price leader; it can change its price and other firms will adjust. Match each example with the type of tax it represents.Citizen A pays 20% on $50,000.Citizen B pays 15% on $36.000regressive taxationCitizen A pays 10% on $50,000.Citizen B pays 10% on $36,000proportional taxationCitizen A pays 15% on $50,000.Citizen B pays 20% on $36,000progressive taxation) IntroDone5 of 15 The glass of a lit 75-watt incandescent bulb is hotter to the touch than the glass of a 25-watt compact fluorescent (CFL) bulb that emits the same amount of light. What could be a reason for this - A time in history was called the Stone Age. Why was it called this At constant pressure, what generally happens to the solubility of solids and gases when the temperature of a solution is increased?A.The solubility of solids and gases increases.B.The solubility of solids and gases decreases.C.The solubility of solids increases, and the solubility of gases decreases.D.The solubility of solids decreases, and the solubility of gases increases. MMS (in the context of mobile phones) stands for "_______" messaging service.