helpppppppppppppppppppppppppp

Helpppppppppppppppppppppppppp

Answers

Answer 1

Answer:

B

Explanation:

Answer 2

Answer:

B

Explanation:

U can read the second part


Related Questions

A flask of water is sealed with a balloon and heated to various temperatures on a hot plate

Answers

Answer:

What is the question?

Explanation:

You just gave a statement.

Answer:

it will increase

Explanation:

1. The average temperature in Addis Ababa, during the summer, is about 25°C. What is the equivalent Kelvin temperature? ​

Answers

Answer:

25 + 273= 298k.

Explanation:

I guess it's correct answer

The equivalent Kelvin temperature is 298 K.

What is temperature?

Temperature is defined as a measurement of an object's or substance's warmth or coolness in relation to a standard value.

It can also defined as the feature of matter that represents the amount of energy of motion of its constituent components.

Temperature scale is defined as a method of indicating or measuring temperature with respect to a beginning point (0 or zero) and a unit of measurement.

Temperature scale is also defined as a way of calibrating the physical quantity temperature in metrology.

Usually there is three types of temperature scale is used.

Celsius scaleKelvin scaleFahrenheit scale

Thus, the equivalent Kelvin temperature is 298 K.

To learn more about temperature, refer to the link below:

https://brainly.com/question/11464844

#SPJ2

22.2 g of LiCiO4:3H2O in 125 mL of solution
Express your answer in moles per liter to three significant figures.
What is the Molar Mass?

Answers

Answer:

Molarity: concentration measured by the number of moles of solute per liter of solution 3)

Explanation:

According to molar concentration, molarity of solution is 1.104 moles per liter and molar mass is 160.437 g/mole.

What is molar concentration?

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.

In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.

Molarity  of solution is obtained as, 22.2/160.437×1/0.125=1.104 moles per liter.Molar mass of  LiClO₄.3 H₂O is 160.437 g/mole.

Learn more about molar concentration,here:

https://brainly.com/question/21841645

#SPJ2

Which property describes a material's ability to conduct heat?

Answers

Answer )
Thermal conductivity

Explanation)

Thermal conductivity is the ability of a material to conduct heat, and it represents the quantity of thermal energy that flows per unit time through a unit area with a temperature gradient of 1° per unit distance.

High temperatures inside Earth form

melted rock.

fossils.

soil.

minerals.

Answers

Answer:

minerals

Explanation:

Hope this helps

Multiple choice (ASAP!)

Answers

Answer:

c

Explanation:

oxygen is lost electrons are added in oxidation state is decreased

Answer:

the correct answer is C

hope this helps <3

the class of organic compound below contains a carbonyl group as a part of its structure?

Answers

Aldehydes and Ketones. Aldehydes and ketones are classes of organic compounds that contain a carbonyl (C=O) group.

that's the correct answer

can I get brainilest

Determine the number of moles in 3.13 × 10²³ formula units of MgCl₂.

Answers

Answer:

0.52 moles

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{3.13 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{3.13}{6.02} \\ = 0.519933[/tex]

We have the final answer as

0.52 moles

Hope this helps you

In which species does sulphur have the more negative oxidation number? Answers: A.  H2S B.  S8 (elemental form of sulphur) C.  H2SO3 D.  K2SO4

Answers

Answer:

H2S

Explanation:

the oxidation number of S is -2.

A particular beer is 65.0% ethanol by volume . If a single bottle of beer contains a total of 750.0 mL of beer, what volume, in mL of ethanol (C₂H₆O), are present in the bottle?
SHOW CONVERSION

Answers

The volume in mL of ethanol (C₂H₆O) present in the bottle is 487.5L

HOW TO CALCULATE VOLUME OF ETHANOL:

According to this question, a particular beer is 65.0% ethanol by volume. This means that the beer contains 65/100 of ethanol.

If a single bottle of beer contains a total of 750.0 mL of beer, the volume of ethanol in the bottle is calculated as follows:

= 65/100 × 750

= 65 × 7.5

= 487.5mL

Therefore, volume in mL of ethanol (C₂H₆O) present in the bottle is 487.5L

Learn more at: https://brainly.com/question/8725232?referrer=searchResults

If the number of neutrons in the nucleus of the atom is 41, and the atomic number is 40, what is the mass number of that atom

Answers

If the number of neutrons in the nucleus of the atom is 41, and the atomic number is 40, the mass number of that atom will be 81

What is mass number?

Mass number is the sum of the number of protons which is the atomic number and neutrons of an atom.

It is represented using the letter ‘A.’

How to calculate the mass number

Mass number = atomic number + neutrons

We have the atomic number as 40 and the number of neutrons as 41

The mass number = 40 + 41 = 81

Therefore, the mass number of the atom will be 81

Learn more about mass number here:

https://brainly.com/question/1805828

what happens when co2 dissolves in water​

Answers

CO2 is in acidic gas so when it’s mixed with water it forms a weak acid called carbonic acid , It’s a really common acid and it only comes in solution form and it is found in aerated drinks like carbonated sodas and soft drinks.

write the electronic configuration of iron in fecl2 and fecl3

Answers

Ferrus is a transition metal.

FeCl_2

Valency of Fe is 2 .Hence Z=26-2=24

Electronic configuration is given by

[tex]\\ \sf\longmapsto [Fe]^{2+}=1s^22s^22p^63s^23p^64s^23d^4[/tex]

FeCl_3

Valency of Fe is 3Hence Z=26-3=23

Electronic configuration is given by

[tex]\\ \sf\longmapsto [Fe]^{3+}=1s^22s^22p^63s^23p^64s^23d^3[/tex]

If the atomic mass of an atom is 16 and its atomic number is 7. how many
neutrons does it have?

Answers

Answer:

8

Explanation:

When excess potassium hydroxide and H2SeO3 react whats the net ionic reaction for the acid-base rxn

Answers

The required net ionic equation is; 2H^+(aq) + 2OH^-(aq)-----> 2H2O(l)

The molecular reaction equation is;

H2SeO3(aq) + 2KOH(aq) -----> K2SeO3(aq) + 2H2O(l)

The complete ionic equation is;

2H^+(aq) + SeO3^2-(aq) + 2K^+(aq) + 2OH^-(aq)-----> 2K^+(aq) + SeO3^2-(aq) + 2H2O(l)

Net ionic equation;

2H^+(aq) + 2OH^-(aq)-----> 2H2O(l)

We can clearly see that this is a neutralization reaction hence water is the product of the net ionic equation.

Learn more:https://brainly.com/question/25150590

Suppose you did the lab and someone came and said your unknown acid sample was
actually HCl instead of H2SO4. Everything else remains the same; the standard acid was H2SO4,
the base was NaOH. What would change in your final calculation of the unknown acid
concentration

Answers

Answer:

H2SO4

Explanation:

because it's not more acidic

         Both sulfuric acid and hydrochloric acid are potent acids, but hydrochloric acid is stronger. Because HCl is monoprotic and H2SO4 is diprotic, they differ mostly in their acid types.

Can HCl be substituted for H2SO4?

     Instead of using hydrochloric acid, sulphuric acid (H 2 SO 4) is preferred because: This acid is commonly utilized for a variety of neutralization reactions. Sulphuric acid is more potent than all other acids and is also simpler and safer to use. Even if there is a risk for negative reactions, they are uncommon.

      The majority of the time because it is for a redox reaction or titration in which HCl would react to produce chlorine on its own. You could use phosphoric or sulfuric acid.

       In this situation, H 2 SO 4 is preferable to HCl. Due to the considerable acidity of H 2 SO 4, the solution is made to be more acidic than HCl. As a result, the findings of titration using H 2 SO 4 are more precise. H 2 SO4 generates two hydronium ions, whereas HCl only generates one.

         It shows how many protons split apart to create hydronium ions. The acid will be more potent the lower the pKa value. Therefore, we can conclude that HCl is more acidic than H2S O 4.

To Learn more About  H2SO4, Refer:

https://brainly.com/question/15192429

#SPJ2

Synthetic reactions in Citric Acid Cycle

Answers

« Synthetic reactions in Citric Acid Cycle »

The overall reaction for the citric acid cycle is as follows: acetyl-CoA + 3 NAD+ + FAD + GDP + P + 2H2O = CoA-SH + 3NADH + FADH2 + 3H+ + GTP + 2CO2.

Many molecules in the citric acid cycle serve as key precursors for other molecules needed by cells.

hope it is

State TRUE or FALSE : Synthetic fibers resists fire.​

Answers

true

All fabrics will burn, but some are more combustible than others.

hope it helps

Can water molecules form ions by
themselves?

Answers

I don’t think so nope
No it does not because it has no density and when there’s no density they don’t form ions by themselves

How many molecules of NaCl are there per mL of the solution?

Answers

Explanation:

Nacl is an ionic compound, so there are no molecules only formula units please mark me brainlist

can anyone heelp me pls pls

Answers

Answer:

Lotion=liquid

suspension=semisolid

capusule=solid

Explanation:

How many molecules of carbon dioxide and how many molecules of water would be produced from 4 molecules of methane (CH4) reacting with 8 molecules of oxygen (O2)

Answers

Answer:

4

Explanation:

water would be produced from 4 molecules of methane (CH4) reacting with 8 molecules of oxygen (O2)

The products of the combustion of hydrocarbon are 4 molecules of carbon dioxide and 8 molecules of water.

What is the combustion reaction?

A combustion reaction can be described as a reaction that produces fire and takes place at a high temperature. It is an exothermic reaction as well as a redox reaction that usually takes place between a fuel and mostly oxygen gas.

Examples of Combustion Reactions such as during the combustion of 4 molecules of methane reacting with 8 molecules of oxygen gas to give carbon dioxide and two molecules of water.

[tex]4CH_4 + 8O_2\longrightarrow 8H_2O + 4CO_2[/tex]

Oxygen is the essential reactant for combustion because the combustion is not possible in the absence of oxygen. Complete combustion takes place when a fuel burns completely to produce heat with oxygen and carbon dioxide.

The burning of wood fuels in the presence of air is an example of combustion. The carbon present in wood reacts with oxygen gas in the air to liberate heat and form gaseous products.

Learn more about combustion reaction, here:

brainly.com/question/12172040

#SPJ2

the pH of soil X is 7.5 while that of soils Y is 4.5 which of the two coils should be treated with powered talked to adjust its PH​

Answers

Answer:

Soils Y

Explanation:

• The soils with lower pH are acidic so they react readily with powdered.

[tex].[/tex]

Answer:

SOIL Y

the soil with lower ph are acidic

What does the phrase “breaking in” mean as it is used in the passage?

A.
In the first instance, it means "to make something come apart," and in the second instance, it means "to stop doing something."
B.
In the first instance, it means "to enter without permission," and in the second instance, it means "to make softer through use."
C.
In the first instance, it means "to stop doing something," and in the second instance, it means "to make something come apart."
D.
In the first instance, it means "to make softer through use," and in the second instance, it means "to enter without permission."

Answers

Answer:

D

Explanation:

It means entry by force.

Elements in the alkaline earth metal family of the periodic table
have
electronegativity values than elements in the
halogen family of the periodic table.

Answers

Answer:Lower

Explanation:

( just had the question on ck12.)

Elements in the alkaline earth metal family of the periodic table have lower electronegativity values than elements in the halogen family of the periodic table as they have less electrons in their valence shell.

What is periodic table?

Periodic table is a tabular arrangement of elements in the form of a table. In the periodic table, elements are arranged according to the modern periodic law which states that the properties of elements are a periodic function of their atomic numbers.

It is called as periodic because properties repeat after regular intervals of atomic numbers . It is a tabular arrangement consisting of seven horizontal rows called periods and eighteen vertical columns called groups.

Elements present in the same group have same number of valence electrons and hence have similar properties while elements present in the same period show gradual variation in properties due to addition of one electron for each successive element in a period.

Learn more about periodic table,here:

https://brainly.com/question/11155928

#SPJ2

Consider:
2Al (s) + 3Cl2 (g) ----> 2AlCl3 (s) ΔH=-1390.81 kJ

Which of the following correctly describes he magnitude and direction of the enthalpy change when 10.0g of AlCl3 forms?

a. 104.4 kJ, exothermic
b. 52.2 kJ, exothermic
c. 26.1 kJ, exothermic
d. 52.2 kJ, endothermic
e. 26.1 kJ, endothermic

Answers

Answer:

The answer is B.

Explanation:

1 mole of AlCl3 = 27 + 3*35.5 grams = 133.5 grams

1 mole / 133.5 = x / 10         Cross multiply

133.5 x = 1 * 10

x = 10 / 133.5

x = 0.0749 moles

Delta H when written the way it is, is on the left side and since it is negative, the reaction must give away 1390.81 kj. The reaction is exothermic.

So now you get the answer between AB and C by setting up a ratio.

2/0.0749 = -1390.81 / x          Cross multiply

2x = 0.0749 * -1390.81

2x =- 104.18                             Divide both sides by 2

2x//2 = -104.18 / 2

x = -52.09

B

Low tides are located at___

A an C

A an B

B an D

Answers

Answer: A and C

Explanation:

Low tides occur in locations at 90 degree angles to the moon. Tidal cycles have the same length as the lunar day, 24 hours and 50 minutes. In this time span, most locations will experience two high tides, when the location is close to and far from the moon, and two low tides. Sides A and C are angled 90 degrees from the moon.

Hence, low tides are located at A and C.

Answer:90 degree angles to the moon.

Explanation:

which among the materials have a varying amount of components are they compounds or mixtures​

Answers

Answer:

Matter can be broken down into two Zalo categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components.

Please help! I will give 100 pts and brainliest if it is good.

Answers

Answer:

group 1 element 6

group 2 element 3

group 11 element 1

group 14 element 2

group 17 element 4

group 18 element 5

Explanation:

Answer:

Explanation:

group 1 element 6

group 2 element 3

group 11 element 1

group 14 element 2

group 17 element 4

group 18 element 5

5 examples of Earth Surface .

Answers

Answer:

lithosphere (land)

hydrosphere (water)

biosphere (living things)

atmosphere (air).

Other Questions
how can the light be described during the blue hour warm ,yellow and rich blue, cool and fade magenta warm and deep bright translucent and white Find two fractions that are equivalent to 1/9=2/18 an artist spent 3/5 of an hour painting 1/4 of a mural. how kuch of the mural will be completed in one hour how long will it take to complete one mural Why was the Federal Reserve created in 1913? In which sentence is the wordimperious used incorrectly?A. She was imperious to the chaos aroundher as she remained absorbed in her book.B. The imperious tone of the requestdemanded an immediate response.C. The judge's imperious demeanor madehim seem unapproachable in thecourtroom. the information in dna is contained in __________. guys pls help me!!!!!! What is 45% of 345? Please help me Im failing math What are some good English literature books Question 1 (1 point) Which of the following is NOT something that can cause your core temperature to change?Question 1 options:Fevers caused by diseaseEnzymes denaturing in your cellsWhen the external temperature gets really hot or coldEnergy produced by your muscles when you exerciseQuestion 2 (1 point) Why is it so important to maintain a core temperature of 37C?Question 2 options:Your core temperature doesn't stay at 37C, it will actually change and reflect the temperature outside.Your body can only make cells at 37C, and we need cells because that is what our body is made of.It is just best to keep that temperature so you don't shiver or sweat.The enzymes in our cells work best at this temperature and these enzymes are needed to carry out all the reactions that happen in our body to keep us alive.Question 3 (1 point) What happens to your enzymes when they get too hot?Question 3 options:The enzymes denature and the active site alters, so the substrate can't fit in there properly and chemical reactions don't happen as fast.The enzyme changes shape, but the substrate still fits in and the chemical reaction can still take place.The enzyme dissolves and the pieces then need to be rebuilt before they can be used again.Nothing, the enzyme can handle temperature changes in the body.Question 4 (1 point) Which organ is super important in helping you in both conserving heat and cooling your off?Question 4 options:Skeletal SystemExcretory SystemRespiratory SystemIntegumentary (Skin) SystemQuestion 5 (1 point) The __________ is the temperature-regulating center of the brain and can detect temperature changes to the blood as it flows through the brain.Question 5 options:SkinHypothalamusNervous systemThymusQuestion 6 (1 point) Which of the following best describes how your muscular and skin systems work to warm you up if you get too cold?Question 6 options:Your muscles begin to contract fast and this movement helps you warm upSmall erector muscles work to raise the hairs on your skin. This helps trap the air close to the skin, goose bumps appear and the air acts as an insulatorblood vessels narrow keeping the blood away from the skin to keep you warmSweat glands release sweat to ensure you stay the proper temperatureQuestion 7 (1 point) Which of the following best describes how your circulatory and skin systems work together to cool you off when you get too hot?Question 7 options:Your blood vessels (capillaries) dilate allowing blood to flow near the surface of your skin. This allows the heat to be released through your skin to help you cool off.You begin to sweat which leaves salt on your skin after the sweat evaporates.The hairs on your skin will lie flat to allow better evaporation of sweat and to allow the heat to be released into the airGoose bumps show up to help your muscles contract to help cool you offQuestion 8 (1 point) If your core temperature falls too low, it is called __________________Question 8 options:hyperthermiathermoregulationhypothermiadehydrationQuestion 9 (1 point) Extreme tiredness and lethargy (slow, not moving much) are the first signs of someone experiencing hypothermia?Question 9 options: True FalseQuestion 10 (1 point) When people exercise in hot weather, which of the following could happen?Question 10 options:People can acclimate to the hotter conditions over time producing more sweat that has lower salt levelsHomeostasis, this could cause their blood sugar levels to riseExcessive sweating can lead to dehydration and heat stroke. Drinking lots of water can help prevent this situation from happeningBoth A and C a constant current flows in the conductor with a magnitude of 1.6 mA. Calculate the charge and number of electrons transferred through the straight cross-section of the conductor in 1 hour. Question 13 (5 points)What percent of energy is passed on to the next trophic level in an ecosystem? Which word from this excerpt of William carlos Williams spring and all has the most negative connotation. A. Awaken B. Clarity C.starkD.dignity 17. The pool is a _____place to swim than the chilly lake.A. GoodB. GooderC. The bestD. better Your last 4 test scores are 65, 70, 80 and70. If you want to finish with a 74average, what do you need to get on yourfifth test? 19 What is the number of moles of nitrogen gas which react with 18 g of magnesium to form magnesium nitride compound ? [Mg = 24,N=14]a) 0.25 mol 0 b) 0.5 mol C) 1 mol d) 2 mol A ball accelerates uniformly at +4.0 m/s2If the ball was initially moving a +0.20 m/s and the average velocity was +4.2 m/s, then how long will it take it to reach the final velocity? When Zack checked his solution, it didnt work. What was his mistake?In step 1, he should have used the multiplication property of equality.In step 2, he should have a constant of 4 on the right side.In step 3, he should have divided both sides by StartFraction 6 Over 4 Endfraction.In step 4, the answer should be positive. What direction would the net force acting on this box be pointed?northeastnorthwestsoutheastsouthwest niaz's car breaks down, and he is convinced that it was a predictable event even though there was no way of knowing it could happen. this exemplifies ________.