Chemistry High School

NEEEDDDD HELP ASAP PLZ PLZ PLZ PLZ PLZ HELP ME

Answers

Answer 1

Answer:

[tex]ns^2[/tex]

Explanation:

Related Questions

what does MA 2 means?

Answers

Answer:

Explanation:

A foam square has a mass of 25 g and a volume of 90 mL. What is the density?

Answers

Answer:

The answer is 0.28 g/mL

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

So we have

[tex]density = \frac{25}{90} = \frac{5}{18} \\ = 0.277777...[/tex]

We have the final answer as

0.28 g/mL

Hope this helps you

Two liters of hydrogen gas are stored at a
pressure of 100 kPa. If the temperature
does not change, what will the volume
of the gas be when the pressure is
decreased to 25 kPa?

Answers

Answer:

the volume will expand

Explanation:

gas under pressure contracts, and expands with a lesser pressure

The volume of the hydrogen gas at 25 kPa is 8 Liters.

Explanation:

Given:

At constant temperature, 2 liters of hydrogen gas at 100kPa pressure.

To find:

The volume of the hydrogen gas at 25kPa.

Solution:

The initial pressure of the hydrogen gas =[tex]P_1=100 kPa[/tex]

The initial volume of the hydrogen gas at 100 kPa =[tex]V_1=2 L[/tex]

The final pressure of the hydrogen gas =[tex]P_2=25 kPa[/tex]

The final volume of the hydrogen gas at 25kPa = [tex]V_2=?[/tex]

Using Boyles law:

[tex]P_1V_1=P_2V_2\\100kPa\times 2 L=25 kPa\times V_2\\V_2=\frac{100 kPa\times 2L}{25 kPa}=8L[/tex]

The volume of the hydrogen gas at 25 kPa is 8 Liters.

Learn more about Boyles law here:

brainly.com/question/12835309?referrer=searchResults

brainly.com/question/1437490?referrer=searchResults

A runner completes a 400m race in 43.9s. What is his average speed?

Answers

Answer:

average speed around 9.1 meters/second

Explanation:

400 divided by 43.9

Answer question number 3

Answers

The first choice should be correct

Plz help! :) :D I will mark you as BRAINLIEST for the best answer!!! ( I actually mean it)
Physical and Chemical Properties of Magnesium

Here is an EXAMPLE of how it has to be like. Instead of Mercury, you HAVE to do Magnesium

Physical Properties of Mercury: ”I’m a highly stable element, so you can count on me”

Chemical Properties of Mercury: ”I love to travel but I do corrode aluminum so we won’t be flying off on adventures in airplanes planes anytime soon”

Answers

huuuuuuh??
explanation

How long will it take for 500.0g of radium decay to 2.0g

Answers

Therefore, the elapsed time must be triple the length of one half-life. 24.33=8.10 , so it is 8.10 hours.

What is the product of Na +CaSO4,

Answers

Answer:

Na + CaSO4 = Na2SO4 + Ca

Explanation:

single displacement (substitution)

What is the volume of a weather balloon that has 39 grams of helium with a density 0.017 g/mL?

Answers

Answer:

The answer is 235.29 mL

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

[tex]volume = \frac{mass}{density} \\ [/tex]

From the question.

density = 0.017 g/mL

mass = 4 g

We have

[tex]volume = \frac{4}{0.017} \\ = 235.2941176...[/tex]

We have the final answer as

235.29 mL

Hope this helps you

I need help on Chemistry?

ANYONE PLEASE?

Answers

Answer:

1. 1g/ml

Explanation:

1. Density is mass divided by volume (g/mL).

10g/10mL = 1 g/mL

2. When you already know the density and the volume, you can use the density as a unit converter.

[tex]5mL*\frac{20g}{mL} = 100g[/tex]

3. It's the same with density and mass.

[tex]20g*\frac{1mL}{5g} = 4mL[/tex]

What is your carbon footprint?

the amount of carbon dioxide you use when recycling
the amount of oxygen put into the atmosphere due to your consumption of fossil fuels
the amount of carbon dioxide and oxygen in the atmosphere at any given time
the amount of carbon dioxide put into the atmosphere due to your consumption of fossil fuels

Answers

Answer:

c. .....................

Answer: the amount of carbon dioxide put into the atmosphere due to your consumption of fossil fuels

Your carbon footprint is the amount of carbon dioxide and other carbon compounds emitted, because of your use of fossil fuels.

Hope this helps!

Analyzing a blood sample usually involves which type of separation method?
screening
distillation
centrifugation
filtration

Answers

The answer would be Centrifugation! How this helps!

Answer:

the answer is b

Explanation:

i just did quizz

1. True or False? The scientific method is defined as a method of research
in which a problem is identified, data is gathered, and a hypothesis is
created based off the data, then the hypothesis is tested.

Answers

Answer:

true

Explanation:

please mark BRAINLIEST

Which of the following atoms has the greatest ionization energy?

a.)W
b.)C
C.)d
P.)d

Answers

Answer:

helium

Explanation:

because there are no electrons screening it from the nucleus

Sodium + oxygen
What colour is the flame produces

Answers

Answer:

Orange

Explanation:

I used google my b

Answer:

ORANGE

explanation:

Small pieces of sodium burn in air with often little more than an orange glow. Using larger amounts of sodium or burning it in oxygen gives a strong orange flame.

A sound wave has a frequency of 20 Hz and a wavelength of 100 m. What is speed of the wave

Answers

The speed of a wave can be calculated using this formula:

v = f x λ

Where:

v is the wave speed in metres per second, m/s

f is the frequency in hertz, Hz

λ (lambda) is the wavelength in metres, m

Calculation:

Given:

f = 20 Hz

λ = 100m

Using the equation:

v = f x λ

v = 20 x 100

v = 2000 m/s

Therfore, the speed of the wave is 2000 m/s

A sound wave has a wavelength of 100 m and a frequency of 20 Hz. The wave's speed is 2× 10^3 m/s.

assuming frequency = 20 Hz and wavelength = 100 m

utilized concept: v= = 20×100 = 2×10³ m/s

Why is frequency important?

The frequency in physics is the quantity of waves passing a fixed location in a unit of time. It also indicates how many cycles or vibrations a body in periodic motion experiences in a given unit of time.

How would you define sound?

A sort of energy created by vibrations is sound. The molecules of the air surrounding an item vibrate as a result.. These molecules vibrate because they collide with nearby molecules, which also vibrate as a result.

To know more about Frequency, visit-

https://brainly.com/question/14316711

#SPJ2

Differences in states of matter are determined by

particle type
particle arrangement
particle color
distance between particles

Answers

Answer:

particle distance

solids are tightly packed

liquids are a little farther apart

and gases are very far

Other Questions

Non example of complex fraction. a ship travels from savannah georgia to lisbon spain at a rate of 27.6 miles/hour. if the distance covered is 3982 miles how long did the trip take What does it represent? The GDP is important because it is a measure of the economys overall economicdebt.strength.weakness.performance. At a school, there are 120 athletes. The ratio of boy athletes to giri athletes is 3:5. How many of the athletes are girls?75B4524D 5 In the Standard American Diet, what percentage of calories typically come from carbohydrates? O 20-30% O 25-40% O50-50%O 55-65% Write a method called min that takes three integers as parameters and returns the smallest of the three values, such that a call of min(3, -2, 7) would return -2, and a call of min(19, 27, 6) would return 6. Use Math.min to write your solution. what are the mood of the religous songs 2. Eukaryotic cells have membrane bound no organelle____ Your boss wants to purchase a graphics design application to be distributed to approximately 40 users in the company. Although the vendor says the application has broad OS support, your boss wants to be sure it will work on the five different OSs running on the companys user workstations. He wants you to verify compatibility by using evaluation copies of the software without disrupting users or their computers. You have the installation disks for all five OSs your company uses, but you dont have a lot of computers available to install the OSs. a. Whats your plan? The specific The specific identification inventory costing method: Select one: A. Measures the ending inventory at the actual prices of the specific units sold during the period B. Is more appropriate for a firm selling construction equipment than for a firm selling greeting cards C. Is not a generally accepted method of pricing inventories D. Uses expected future acquisition costs rather than historical costs to measure the ending inventoryinventory costing method: The florist makes the greatest number of identical arrangements with the carnations and asters. She has 72 carnations and 42 asters. How can she decide how many carnations to place in each arrangement?A. Subtract the number of asters from the number of carnations.B. Divide the number of carnations by the GCF of 72 and 42.C. Find the least common multiple of 72 and 42.D. Find the greatest common factor of 72 and 42. There are 90 people in a group.A sixth of the people in the group are men.The number of women in the group is 2 times the number of men in the groupThe rest of the people in the group are children.the number of children in the group : the number of men in the group = n: 1Work out the value of n.You must show how you get your answer. Solid diarsenic trioxide reacts with fluorine gas (F2) to produce liquid arsenic pentafluoride and oxygen gas (O2). Write the Qc for this reaction. Question 10 (1 point)In what ways were the Byzantines culturally distinct from the Western RomanEmpire?The Romans were Christian and spoke Latin.The Byzantines were Christian and spoke Latin.The Byzantines were Christian and spoke Greek.The Romans were Christian and spoke Greek. What is the approximate diameter of the Zika virus? The Question is Below; What is the value of the expression 5(X+3) when X=-3? How long will it take for 500.0g of radium decay to 2.0g Mamie Clark was a psychologist who is known for her research on __________. A. intellectual and developmental disabilities and gifted children B. racism and its adverse effects on child development C. identity development among Asians living in the US D. academic development of children in desegregated schools