help asap i don’t understand at all lol

Help Asap I Dont Understand At All Lol

Answers

Answer 1

Answer:

a, to reduce air bubbles

Explanation:

all its asking, is what is the purpose of the cover. and a is the most reasonable out of all of them, even though none of them make any sense.

Answer 2
to reduce air bubbles

Related Questions

1. the moderns periodic table, elements are ordered
a. according to decreasing atomic mass
b. according to mendeleev's original design
c. according to increasing atomic number​

Answers

Answer:

In the modern periodic table, the elements are listed in order of increasing atomic number. The atomic number is the number of protons in the nucleus of an atom In a periodic table arranged in order of increasing

C is the answer! Good luck

A 30L sample of N2 at 20*C is heated to 50*C. The pressure at 20*C was at 3 atm. What is the pressure of N2 after its temperature increased?

Answers

Volume stays constant, so: P1/T1 = P2/T2

P1 = 3 atm

T1 = 20*C = 293 K

P2 = ?

T2 = 50*C = 323 K

Solve for P2: P1T2/T1 = P2

P2 = (3 atm)(323 K)/(293 K) = 3.3 atm

The Pressure of N2 after its temperature increased will be "3.3 atm". To understand the calculation, check below.

Pressure and Temperature:

According to the question,

Pressure, P₁ = 3 atm

Temperature, T₁ = 20°C or,

                           = 293 K

                      T₂ = 50°C or,

                           = 323 K  

We know the relation,

→ [tex]\frac{P_1}{T_1}[/tex] = [tex]\frac{P_2}{T_2}[/tex]

or,

Pressure, P₂ = [tex]\frac{P_1\times T_2}{T_1}[/tex]

By substituting the values,

                     = [tex]\frac{3\times 323}{293}[/tex]

                     = [tex]\frac{969}{293}[/tex]

                     = 3.3 atm

Thus the above response is correct.

Find out more information about pressure here:

https://brainly.com/question/26040104

A wagon is pushed in a straight line. How would an increase in friction on the wagon wheels affect the wagon ?

Answers

Answer:

A  wagon is pushed in a straight line. How would an increase in friction on the wagon wheels affect the wagon? A It would cause the wagon to move faster.

Explanation:

Hoped this helped you guys!

2) Why do some earthquakes cause more damage than others?

Answers

Answer:

Earthquakes are more intense the faster the planet's crust slams together, which explains why the shaking causes so much damage in some of the most populated areas around mountain chains. ... One reason for this connection is that when two plates come together quickly, the area over which an earthquake occurs is larger.Explanation:

just help frllllllllllllllllllllllllllllllllllll

Answers

Answer: 2 The Proximity toward the ocean

Explanation:

May i plz have brainiest  

which of the following represents the atoms of 2 different elements?

Answers

Answer:

B

Explanation:

how many atoms are in 1.6g C? Answer in units of atoms.

(no answer choices were given)

Answers

Answer:

6.022  ×10(index 23) / 7.5 = 0.8293 ×10(index 23)

Explanation:

molar mass of C =  12gmol

therefore in 12g of C there is one mole or an amount of 6.022 ×10(index 23)

∴12g/6.02210(index 23) ×1.6g

If you squeeze a sealed bottle in the middle, what force is applied at the top of the bottle?

A) less force
B) more force
C) the same force
D) cannot be predicted​

Answers

B, more force.because the pressure forces it upward instead
Answer: B) more force

Which of the following setups will correctly convert 36.45 grams of sodium to moles of sodium?

Answers

Answer:

D.

Explanation:

To convert from grams of a substance to moles of a substance, you use molar mass as a conversion factor. Sodium's molar mass is 22.99 grams per mole. To cancel out grams, you need to place grams on the bottom and moles on the top.

PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!! THIS IS DUE IN 10 MINUTES!!!!!
Forensic chemists are analyzing blood samples taken from a murder victim. They run tests for any trace of substances that do not naturally occur in the bloodstream. Nothing odd registers but they do find extremely high levels of caffeine. What does this most likely indicate about the murder victim?

A) They drank a lot of coffee.
B) They worked on a coffee bean plantation.
C) They were poisoned with powdered caffeine.
D) Someone put arsenic in their coffee.

Answers

Answer:

c

Explanation:

Answer:they were poisoned with powdered caffeine (C)

Explanation:

I just took the test! And got all the points for this question :) hoped I could help

bromine water can be used to distinguish between these two molecules?? true or false​

Answers

Answer:i dkd

Explanation:

jsach

pls help, what is this compound called?

Answers

Answer:

Ammonium

Explanation:

ammonium is a compound because it has 2 elements

compound is a material formed by chemically bonding two or more chemical elements.

Just help please

And does anybody know Johnny from NCT

Answers

Yes the name of it is

30 points if you tell me your favorite food! ☺️

Answers

Answer:

Pizza, salad, tacos, burgers, etc.

Explanation:

:D

50g of potassium chloride is dissolved in 500 cm3 of water. Calculate the concentration of the solution. Give your answer in g/dm3

Answers

50g of potassium chloride

In the levels of organization of an organism, what does a group of cells make up?

Answers

Answer:

they make tissue. form organ and whole body an i true..

What pressure is required to compress 196.0 liters of air at 1.00 atmosphere into a cylinder whose volume is 26.0 liters?

Answers

Answer:

if volume of the gas increases, its pressure decreases, and vice versa. mathematically, if the volume of the gas is  

V

1

and its pressure is  

P

1

. Let us suppose that its volume has been increased to  

V

2

, the as per the Boyle's law its pressure will decrease and let us assume the new pressure is  

P

2

.

P

1

 

V

1

=

P

2

V

2

P

1

= 1 atm

V

1

= 196 L

P

2

= ?

V

2

= 26 L substitute the values;

1 atm x 196 L =  

P

2

x 26 L

P

2

= 1 atm x 196 L / 26 L

P

2

= 196 atm L / 26 L = 7.53 atm

Explanation:

I hope this helps.

Answer:

7.53 atm

Explanation:

Boyle studied the relationship between the pressure of a trapped gas and its volume. The data obtained by him shows that the product of pressure and volume for the trapped air sample is constant at a constant temperature.  if volume of the gas increases, its pressure decreases, and vice versa. mathematically, if the volume of the gas is  V 1  and its pressure is  P 1 . Let us suppose that its volume has been increased to  V 2 , the as per the Boyle's law its pressure will decrease and let us assume the new pressure is  P 2 .  P 1   V 1  = P 2 V 2  P 1  = 1 atm V 1  = 196 L P 2  = ? V 2 = 26 L substitute the values;  1 atm x 196 L =  P 2  x 26 L  P 2  = 1 atm x 196 L / 26 L  P 2  = 196 atm L / 26 L = 7.53 atm

There are three factors in which natural selection occurs. Select one statement from the list below that is a true statement about natural selection.

Answers

Answer: There is no list in your question. But the three factors in which natural selection occurs are:

1. A struggle for existence,

2. Variation and

3. Inheritance

Explanation:

Darwin’s theory of natural selection is the way in which organisms change overtime.

These changes allow organisms to become better adapted to their environment and increase their chances for survival.

The three major factors through which natural selection occurs are:

1. A struggle for existence,

2. Variation and

3. Inheritance

Darwin’s theory of natural selection will occur if the three conditions above are met and unless these factors are in place, natural selection will not occur.

What is the molarity of a solution containing 12.0 g of NaOH in 250.0 mL of solution?

Answers

Answer:

1.196 M NaOH

Explanation:

Molarity = moles/Volume (L)

moles NaOH = mass NaOH/MM NaOH = 12/40.01 = 0.299 moles NaOH

Volume solution = 250 mL = 0.250L

M = 0.299/0.250=1.196 M NaOH

Which diagram represents matter with a definite volume but no
definite shape?

Answers

i think it is Substance C

How can we prepare a weak acid from
carbondioxide ? Write with chemical equation
SAP​

Answers

Answer:

H2O+CO2--------> H2CO3

Answer:

Carbonic acid- H2CO3

Explanation:

Water+co2 gives H2CO3

H2CO3 is an acid, which Carbonic acid that is H2CO3 is a weak acid

It decomposes into CO2 and H2O

Energy is transferred
between the ocean and the
air to make sure that the
temperature in the air is
higher than the temperature
on the surface.

True or false

Answers

true is the right oneee

19) Which one of the following statements describes a chemical property of hydrogen gas?
A) Hydrogen gas has a density of 0.00009 g/cm’ at STP.
B) Hydrogen gas burns in air.
C) Hydrogen gas has a boiling point of 20. K at standard pressure.
D) Hydrogen gas is colorless.

Answers

b) hydrogen gas burns in air.

explanation: the rest are physical properties.

A water solution containing an unknown quantity of a

nonelectrolyte solute is found to have a freezing point of

–0.23°C. What is the molal concentration of the solution?​

Answers

Answer:

The molal concentration of the solution is approximately 0.124 molal

Explanation:

The given parameters are;

The reduced freezing point of the water = -0.23°C

For freezing point depression of a solution, we have;

[tex]\Delta T_f[/tex] = [tex]K_f[/tex]· b·i

Where;

[tex]\Delta T_f[/tex] = The freezing point depression

[tex]K_f[/tex] = Cyroscopic constant (The freezing-point depression constant) = 1.86° Cm⁻¹ for water

b = The molality of the solution

i = van't Hoff factor = 1

Therefore;

[tex]\Delta T_f[/tex] = [tex]T^{\circ}_f - T_f[/tex]

Where;

[tex]T^{\circ}_f[/tex] = The freezing point of pure water = 0°C

[tex]T_f[/tex] = The freezing point of the solution = -0.23°C

∴ [tex]\Delta T_f[/tex] = [tex]T^{\circ}_f - T_f[/tex] = 0°C - (-0.23°C) = 0.23 °C

From, [tex]\Delta T_f[/tex] = [tex]K_f[/tex]· b·i, we have;

0.23°C = 1.86°C/m × b × 1

∴ b  = (0.23°C/1.86°C/m) ≈ 0.124 molal

Therefore, the molal concentration of the solution, b ≈ 0.124 molal.

What can be concluded from the following statements about a property of metats? • Acast-iron skillet on a stove is used to try bacon • A metal spoon left in a pot of soup heating on a stove is too hot to touch - An aluminum playground slide gets hot on a summer day. O A Metals combine with nonmetals.O B. Metals are good insulators. O C Metals conduct electricity D Metals conduct heat.​

Answers

Answer:

D - metals conduct heat

during the ___________ (anaphase, metaphase) step of mitosis, the centromere of each pair of chromatids becomes attached to two spindle fibers

Answers

metaphase

In metaphase, the chromosomes line up on the metaphase plate and have a spindle fiber attached to each chromatid. In anaphase, the chromatids separate.
Hi, the answer is metaphase.

The following diagram shows a single cell. Is the cell eukaryotic or prokaryotic? Explain your reasoning. *

Answers

Answer:

because it is a single cell. Cell A, because a nuclear membrane contains the cell’s DNA. Cell B, because it is much smaller. Cell B, because it contains genetic material

Explanation:

How many grams of AgCl are produced from 10.0 g AgNO3?

Answers

Answer:

Equation of Reaction = AgNO3 (aq) + NaCl (aq) → AgCl (s) + NaNO3 (aq)

Steps:

1. Find the moles of AgNO3 with formula n= Mass/Mr (molecular mass)

so you will get moles= 10.0/ 169.87 = 0.05886854654

2. Using stoichiometry you know the equation has 1 mole so the moles of AgCl are gonna be the same; therefore, you will use again the same formula.

3.  moles= mass/molecular mass

0.05886854654 = x/ 143.32

You rearrange the formula to find the mass

so mass = moles x molecular mass

mass = 0.05886854654 x 143.32

mass= 8.44 grams

Explanation:

Generally, when food is cooked:
choose all that apply

The food absorbs energy.

An exothermic reaction takes place in the food.

An endothermic reaction takes place in the food.

Answers

Answer:

An exothermic reaction takes place in the food

What three sedimentary rocks form from chemical precipitates and evaporites?

Answers

Answer: Rocks formed in this way include halite, gypsum, anhydrite, and some limestones. Layers of precipitated rocks are called evaporite deposits because they typically form where evaporation is high in arid regions like the desert southwest and in the eastern Mediterranean.

Explanation:

The three sedimentary rocks form from chemical precipitates and evaporites are halite, gypsum and anhydrite.

What are sedimentary rocks?

Pre-existing rocks or bits of once-living animals constitute sedimentary rocks. They are formed by the accumulation of sediments on the Earth's surface.

Halite, gypsum, anhydrite, and various limestones are examples of such rocks. Evaporite deposits are layers of precipitated rocks that occur in arid locations like the desert southwest and the eastern Mediterranean where evaporation is considerable.

Hence three sedimentary rocks are Halite, gypsum and anhydrite.

To know more about sedimentary rocks, visit the below link:

https://brainly.com/question/195844

#SPJ2

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