Will mark brainly
ASAP thank you if you solve this

Which of the substances are elements please help

Answer nb 1 and 2 to be marked as Brainliest ​

ionic bonding is formed between the atoms of______ and ______?​

A sample of gas occupies 3.00 L with 5.00 moles present. What would
happen to the volume if the number of moles is increased to 8.0?

Radium decays to form radon. *x26Ra 222 Rn + He 86 This type of nuclear decay is called​

Is this correct ? I need help

Every animal is composed of a collection of organs, allowing the animal to live. Animals have internal to external skeletons that allow which of the following functions for the animal?
Group of answer choices

Exchange gases

Protect from disease

Take in nutrients

Allow movement

initially 10cm^3 of nitrogen and 24cm^3 of hydrogen are mixed in a container. The temperature and pressure remain constant. Calculate the volume of gas that will remain in the container after the reaction is complete​

PLEASE HURRY I WILL GIVE BRAINYEST What is the correct term for a community of plants and animals and their physical surroundings?
biotic
ecosystem
population
abiotic

SEP Analyze Data Which two columns have identical data? What do these two columns suggest about the identity of elements?

acrostic words or phrases that describe street dance​

why do some material steel hotter than others even if the two materials are the same temperature

A scientist prepares 500.0 L of gas at 0.921 atm pressure
and 200.0°C. The scientist transfers the gas into a tank
where it cools to 20.0°C and has a pressure of 30,0 atm.
What is the volume of the gas under these conditions?
I

Which of the following is the term for the heaviness on something's surface that exerts a force over an area? a. force b. pressure c. sediment d. depositionn

What color would the methyl orange indicator turn in a solution with a pH of 2?

In a closed system, the total energy before an energy transformation is _______ the total energy after it.

Calculate the volume in mL of 53.2 g of .251M solution of HCl.

How many moles are in 5NO3?

Which formula can be used to calculate the molar mass of ammonia (NH3)?

Molar mass of N + molar mass of H
3 × molar mass of N + molar mass of H
molar mass of N + 3 × molar mass of H
3 × molar mass of N + 3 × molar mass of H

On the cooling curve below, between points Dand Ethe substance is changing from
A. gas to solid
B. gas to liquid
C. liquid to solid
D. solid to liquid

¿Las cargas eléctricas forman parte de los átomos?

4.1 moles of sodium carbonate to molecules of sodium carbonate.

Number 7 plssssssssssss

According to the dichotomous key, organism 2 is a
A)
dragonfly nymph
B)
water scorpion
C)
bristle worm.
D)
water mite.

What is the connection between wildfires and sea ice?

Need help pleaseeeeeeeeee help me

PLEASE HELP
Four students are asked to describe a nebula and a star. Their responses
are shown in the table below. Which student described these two
celestial bodies correctly? *
Student
1
2.
Student Responses
Description of a Nebula
Description of a Star
A collection of hot gases that A sphere of dust and gases that contains
sometimes produces light from many elements and produces light from
nuclear reactions
fusion and fission reactions
A collection of hot gases that
results from stars that have
A collection of gases from several nebulae
exploded
hot enough to cause a nuclear reaction
A collection of dust and gases A sphele of matter with a density and a
that forms stars or results from temperature great enough to cause a
dying stars
nuclear reaction at its center
A collection of dust and gases A collection of hot gases that forms a
that is found near stars
sphere but produces no light
3
4
Student 1
Student 2
Student 3
Student A

How many moles are in 25.0 grams of HF?

what is the chemical reaction for respiration ​

Xavier was conducting a long term study of two populations of butterflies. Both populations had the same number of individuals. Both populations lived in forests that were the same size. Population A lived in a forest that was full of milkweed, the favorite food of this butterfly species. Population B lived in a forest that had limited amounts of milkweed and other foods. Over many years, Xavier found that one of the populations was showing signs of evolutionary change. Their mouth parts were changing and they could get food from new kinds of plants. Which statement explains why one population would be more likely to evolve in response to natural selection? *
a. Population B would be more likely to change because it has a ready supply of food, and only certain butterflies would be able to survive
b. Population A would be more likely to change because it has a ready supply of food and only certain butterflies would be able to survive
c. Population A would be more likely to change because it has a limited amount of food and some butterflies might be better able to get enough food, survive, and reproduce
d. Population B would be more likely to change because those butterflies have a limited supply of food, and butterflies with certain traits might be better able to get enough food, survive, and reproduce.