Chemistry High School

which element has a smaller atomic radius than strontium (Sr)?

Answers

Answer 1

it is tecnically magnesium,

Answer 2

Answer:

barium is the answer

Related Questions

Hi people senko-San is best wifu change my mind

Answers

Answer:dude what are you doing here?

Explanation:also i don’t know if I can lol

How many atoms of Mg are present in 97.22 grams of Mg?

Answers

Answer:

2.439 x 10E24 atoms

Explanation:

from

N=n x NA where

N- number of atoms

n-number of moles and NA is the avogadro's number

Which phrase describes runoff?

1.underground water that flows into lakes

2.river water that empties into an ocean

3.water from streams that flows into larger rivers

4.water from rain and snow that travels to streams
Please help!

Answers

Explanation:

water from rain and snow that travels to streams

Please help!

Water from a rain and snow that travels to streams are examples of run off. These natural processes are part of water cycle and balance the water content in the atmosphere and hydrosphere.

What is water cycle ?

Water cycle is a geological phenomenon to balance the water content in the atmosphere, hydrosphere and in the biosphere. The water bodies evaporate by the heat radiated by sun.

The air moisture can be restored to the land through the cooling of the vapor and pour as rain. This best illustrates the interaction between atmosphere and hydrosphere.

Rain, snow, sleet, or hail that reaches a surface stream without ever going below the soil's surface is referred to as surface runoff. It differs from direct runoff, which is runoff that directly reaches surface streams following rainfall or snowmelt. Hence option 4 is correct.

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If the molecular mass of a substance is 7.304 • 10²³ g, find its molar mass.

Answers

Answer:

1.213 g/mol

Explanation:

We are given that the molecular mass is 7.304 × 10²³ g.

From avogadro's number, we know that;

1 mole of a substance = 6.022 × 10²³ molecules

Thus;

Molar mass = molecular mass/avogadro's number = (7.304 × 10²³)/(6.022 × 10²³) = 1.213 g/mol

substances can be categorised in two ways: as an element, mixture or compound ora as a solid, liquid or gas. which
of these methods Is of most use ti chemist?

Answers

Answer:

Most substances on earth are compounds and most interesting chemistry is done with compounds. Most interesting chemistry is done with mixtures of compounds although they often start with pure compounds and then do reactions as mixtures. Most chemistry is carried out in liquid solutions made up of compounds that are solids, liquids, or gases in their pure form.

Explanation:

Here, we are required to determine which of these methods of classifying substances is most important to chemists.

The most useful classification of compounds to chemists is as Elements, Compounds or Mixtures

First classification of substances involves categorising them as pure substances (elements and compounds) or mixtures.

The second classification of substances is categorisation with respect to their state of matter. In essence, we can have solid, liquid or gas.

However, the most useful classification of compounds to chemists is as Elements, Compounds or Mixtures.

This is so because, the type of matter present in Elements are distinct for each element, same as for Compounds and Mixtures formed from a combination of pure substances.

Chemists focus on the diverse properties of substances, as such classification as elements, compounds and mixtures provides a wide basis for the qualitative and quantitative analysis of the properties of substances.

Classification of substances as solid, liquid or gas leaves a narrow avenue for the study of substances as the substance still contains the same type of matter, only this time in different states.

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83.0 g Lithium Cyanide (LiCN)
calculate this to molar mass and moles. Please

Answers

Answer:

32.958 g/mol

2.52 moles

Explanation:

Finding the molar mass:

Use the periodic table to determine the masses of each element

6.94+12.011+14.007=32.958 g/mol

Moles:

83 g*1 mol/32.958 g = 2.5183566964 moles

Molar mass:-

[tex]\\ \sf\longmapsto LiCN[/tex]

[tex]\\ \sf\longmapsto 7u+12u+14u[/tex]

[tex]\\ \sf\longmapsto 21u+12u[/tex]

[tex]\\ \sf\longmapsto 33u[/tex]

[tex]\\ \sf\longmapsto 33g/mol[/tex]

Given mass=83g

No of moles=Given Mass/Molar mass

[tex]\\ \sf\longmapsto \dfrac{83}{33}[/tex]

[tex]\\ \sf\longmapsto 2.5mol[/tex]

Find the mass of a person walking west at a speed of 0.8 m/s with momentum of 52.0 kg*m/s west.

Answers

Answer:

12 preguntas y no te sabes ni una sola valla el mundo se está acabando

Answer:

65 kg

Explanation:

m = p ÷ v

m= 52 ÷ 0.8

m = 65 kg

how many mongo seed are equal to 3.50 moles of mongo seeds?

answer:

2.107 x 10^24 mongo seeds

Answers

Answer:

50 moles of many mango seeds = 2.107.10²⁴ mango

Further explanation

A mole is a unit of many particles (atoms, molecules, ions) where 1 mole is the number of particles contained in a substance that is the same amount as many atoms in 12 gr C-12

While the number of moles can also be obtained by dividing the mass (in grams) with the molar mass of element or molecule

With Avogadro's number

N = number of gas particles

No = Avogadro number (6.02.10²³)

n = number of moles

n= N/No

3.50 moles of many mango seeds are comparable to

N mango seeds= 3.5 x 6.02.10²³

N mango seeds=2.107 x 10²⁴..

what is the skeleton equation of 2Na + Cl2 → 2NaCl.

Answers

Answer:

Mark me as brienleist

Explanation:

mother aware to u

Solid potassium chlorate breaks into potassium chloride and oxygen gas when heated up to high temperature. This is an example of a/an _______ reaction.

Answers

Answer:

es correcto bro claro eres un crak

Answer:

Decomposition Reaction

Explanation:

You can determine the type of reaction by writing out a balanced equation.

Solid Potassium Chlorate: KClO3

Potassium Chloride: KCl

Oxygen Gas: O2

Balanced Equation: 2KClO3 -> 2KCl + 3O2

By definition, a decomposition reaction is when a single substance decomposes into two more simpler substances. AB -> A + B

Because the solid potassium chlorate is breaking into two substances, potassium chloride and oxygen gas, it is a decomposition reaction.

how many moles are in 3.0x10^24 molecules of water

Answers

I HOPE MY ANSWER HELPS YOU;))

Answer:

3.52 x 10^24 molecules x `1mol/6.02 x 10^23 molecules = 5.85 moles of H2O.

Explanation:

Question 8
Which one of the following salts does not contain water of crystallisation?

Answers

Baking soda is sodium bicarbonate in anhydrous form without any water of crystallisation and it is widely used as dry fire extinguisher because of its alkali nature.

Answer:

Explanation:

dosn't contain water of crystallization

Which statement correctly describes soil horizon C? A. It is considered the subsoil layer. B. It is the horizon with the smallest rock pieces. C. It is also referred to as the bedrock layer. D. It is the horizon that contains the least humus.
Help I'll help y'all
heyyyyy.

Answers

Answer:

It's D, it is the horizon that contains the least humus.

Explanation:

I just did the test

The statement which correctly describes the soil horizon is option B. The horizon B contains the the smallest rock pieces. It is also called the subsoil layer.

What is soil horizon?

Soil horizon contains different layers of soil which are classified based on the composition of the soil and the presence of rocks within the soil. The primary level of the soil is rich in humus. The decomposed of matter of plants and animals are called humus. On which the plants are growing.

The secondary level of soil horizon or the subsoil level contains some small rocks also onto which the roots of plants does not adhere so much. The third level of soil horizon contains bigger rocks with small gaps between them.

The last layer of the soil horizon is called bedrock layer containing bigger rocks with no significant gaps between them It is called the bedrock layer.

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Picture a neutral S atom. This neutral atom will have
valence electrons. To reach a more stable configuration, this atom will
(gain, lose) electrons. The charge of the ion that forms will be
ASAP please

Answers

Answer:

it will have 6 valence electrons

it will gain electrons

charge will be 2-

Which is the function of a cell′s nucleus

Answers

Answer:

The cell's nucleus controls the activities of a cell and carries genes that contain information.

It controls and regulates the activities of the cell. it also carries genes, structures that contain the hereditary information.

what is the answer to this

Answers

Answer:

Explanation:

i may be wrong but i think its b

Answer:

B Ndaira is right for real

Practice Problem #2: How many atoms
of Ba are in 7.8 moles of Ba?

Answers

[tex]7.8 \: mol = \frac{6.02 \times {10}^{23} atoms}{1 \: mol} = 4.6956 \times {10}^{24} \: atoms[/tex]

round as you wish.

What is earth's crust mainly composed of

Answers

Answer:

The crust is made of solid rocks and minerals. Beneath the crust is the mantle, which is also mostly solid rocks and minerals, but punctuated by malleable areas of semi-solid magma. At the center of the Earth is a hot, dense metal core.

Explanation:

Answer:

The crust is made of solid rocks and minerals. Beneath the crust is the mantle, which is also mostly solid rocks and minerals, but punctuated by malleable areas of semi-solid magma.

what is a second degree burn

Answers

a second degree burn is a burn that affect the first and second layers of your skin. it may develop blisters and look wet or moist. the pain caused can be very severe

How many atoms are in 11.5 g of Hg?
A. 5.73 x 10^-2 atoms
B.3.45 atoms
C.3.45 x 10^22 atoms
D. 5.73 atoms

Answers

C 3.45 x 10^22 atoms

Is C. 345 x 10^22 atoms

HELPPP which one has four energy levels Si, Ge, or Sn???

Answers

Answer:

Explanation:

pretty sure im on high school 12th

Explain why it is often necessary to start a campfire with many pieces of kindling (small pieces of wood) rather than with a few large logs

Answers

Answer:

It is often necessary to start campfire with many pieces of kindling rather than large logs because it is easier to ignite smaller pieces than larger pieces. Imagine wanting to light up a pile of clothes and a small piece of a shirt. Which ignites faster? The piece of a shirt, because it is smaller and more likely to burn very quickly. Additionally, people criss-cross these tiny pieces of wood to enable more surface area and to allow more oxygen to pass through. As you know, oxygen is necessary for a flame to ignite.

What drives this process

Answers

Answer:

Explanation:

cool air never rises so not A

C would mean its getting warmer

and heat flows from warm to cool so not D

we are left with B

if my anwser helps please mark as brainliest.

The answer to your question is C.
Convection currents in the air.

This phenomena is called an offshore breeze. At night, land is cooling faster than water; the air above the land also cools and, therefore, its density grows. As a result, the pressure above the land is greater than above the water, and the air moves from the regions with higher pressure (land) to the ones with lower pressure (water).

explain the factor of a skeleton system

Answers

The human skeletal system consists of all of the bones, cartilage, tendons, and ligaments in the body. Altogether, the skeleton makes up about 20 percent of a person’s body weight. An adult’s skeleton contains 206 bones. Children’s skeletons actually contain more bones because some of them, including those of the skull, fuse together as they grow up. There are also some differences in the male and female skeleton. The male skeleton is usually longer and has a high bone mass. The female skeleton, on the other hand, has a broader pelvis to accommodate for pregnancy and child birth. Regardless of age or sex, the skeletal system can be broken down into two parts, known as the axial skeleton and the appendicular skeleton. Axial skeleton anatomyThe adult axial skeleton consists of 80 bones. It’s made up of the bones that form the vertical axis of the body, such as the bones of the head, neck, chest, and spine. The adult skull comprises 22 bones. These bones can be further classified by location: Cranial bones. The eight cranial bones form the bulk of your skull. They help to protect your brain. Facial bones. There are 14 facial bones. They’re found on the front of the skull and make up the face.Auditory ossicles The auditory ossicles are six small bones found within the inner ear canal in the skull. There are three auditory ossicles on each side of the head, known as the: malleus (hammer)incus (anvil)stapes (stirrup)They work together to transmit sound waves from the surrounding environment to the structures of the inner ear. The hyoid is a U-shaped bone found at the base of the jaw. It serves as a point of attachment for muscles and ligaments in the neck. The vertebral column is made up 26 bones. The first 24 are all vertebrae, followed by the sacrum and coccyx (tailbone). The 24 vertebrae can be further divided into the Cervical vertebrae. These seven bones are found in the head and neck. Thoracic vertebrae. These 12 bones are found in the upper back. Lumbar vertebrae. These five bones are found in the lower back. The sacrum and coccyx are both made up of several fused vertebrae. They help support the weight of the body while sitting. They also serve as attachment points for various ligament. The thoracic cage is made up of the sternum (breastbone) and 12 pairs of ribs. These bones form a protective cage around the organs of the upper torso, including the heart and lungs. Some of the ribs attach directly to the sternum, while others are linked to the sternum via cartilage. Some have no attachment point and are referred to as “floating ribs.”

There’s a lot of bones and bones

It's football season! Big Bubba Brown is running full speed trying to tackle the quarterback before he throws the ball. Wham! He got him! What happens to Big Bubba Brown?
A. Bubba uses all of his energy to tackle the quarterback.
B. Bubba and the quarterback lose their energy and fall to the ground.
C. Some of Bubba's energy is transferred to the quarterback and Bubba slows down.
D. Bubba knocks the quarterback down and keeps running at the same speed as before the tackle.

this is science btw.

Answers

Answer:

C. Some of Bubba's energy is transferred to the quarterback and Bubba slows down.

Explanation:

I majored in Science

Answer:C. Some of Bubba's energy is transferred to the quarterback and Bubba slows down.

just did the usatestprep

how did the periodic table get its name?
a. the periodic table got its name from the way the elements are arranged in periods called groups.
b. the periodic table got its name from the way the elements are arranged in rows which are called periods.
c. the periodic table got its name from the way the elements are arranged in rows which are called periodic groups.
d. the periodic table got its name from the way the elements are arranged in rows which are called groups.

Answers

Answer:

no te engiendo mi panahellow

Answer:

Explanation:

b. the periodic table got its name from the way the elements are arranged in rows which are called periods.

Write the word and balanced chemical equations for the reaction between:
Copper + zinc nitrate (zinc is more reactive than copper)

Answers

Answer:

Word Equation:

Zinc + Copper (II) nitrate → Copper + Zinc nitrate

Formula Equation:

Zn (s) + Cu(NO3)2 (aq) → Cu (s) + Zn(NO3)2 (aq)

Ionic Equation:

Zn (s) + Cu2+ (aq) → Zn2+ (aq) + Cu (s)

Description

A 1 gram granule of zinc metal was dropped into a test tube containing 10 cm

of clear blue copper nitrate solution (1 M). The zinc quickly began to react with the solution producing a clear green solution and a darker solid at the bottom of the test tube.

Explanation:

reaction type
__HCl + __Mg -> __MgCl2 + __H2

Answers

single replacement reaction type

BF3
What is The calculation and bond type

Answers

Bond order is 1 1/3 the type of bond is it’s a covalent bond

Which cell organelle controls all cell activities? Group of answer choices B. Nucleus C. Cytoplasm D. Mitochondria A. Cell Membrane E. Cell Wall

Answers

Nucleus is the answer
Your welcome :)

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