Help please I am so lost my teacher is no help

Help Please I Am So Lost My Teacher Is No Help

Answers

Answer 1

Answer:

B - CALCIUM

Explanation:

Hopes it helps


Related Questions

A soccer player applies a force of 56.6 N to a soccer ball while kicking it. If the ball has a mass of 0.46 kg, what is the acceleration of the soccer ball?

Answers

Answer:

[tex]a=123.04\ m/s^2[/tex]

Explanation:

Given that,

Force applied to a soccer player, F = 56.6 N

The mass of the ball, m = 0.46 kg

We need to find the acceleration of the soccer ball. The force acting on the ball is given by :

F = ma

Where

a is the acceleration

[tex]a=\dfrac{F}{m}\\\\a=\dfrac{56.6 }{0.46 }\\\\a=123.04\ m/s^2[/tex]

So, the required solution is [tex]123.04\ m/s^2[/tex].

Light travel in __________ lines until reflected or refracted .

Answers

Answer:

Light travel in _____straight_____ lines until reflected or refracted

straight lines until

What ion does sodium (Na) form

Answers

Probably ion with a positive 1 charge.

Explained briefly

How many moles are in 80.00 g of magnesium hydroxide?
1.37moles
0.73moles
46.64moles

Answers

Answer: 1.37 Mol

Reason: 80g/58.31g/Mol = 1.37

Thermal energy is added to water to raise the temperature to 250F.
Which of the following models BEST describes the movement of the particles after the thermal energy is added?

Answers

Answer:A

Explanation:the water will start to boil representing the yellow particles.

Answer:

A

Explanation:

Lol I'm doing the test right now and I have notes

Heeeeeellllppp, Iiiimmm sssooo stttuuuccckkk!​

Answers

Answer:

I think it would be D. None of the above

Explanation:

why I think this is because none of the answers really adds up to it

Swinging a golf club toward a golf
ball and hitting it off the tee.

Answers

What u have to tell us what to do

What is the name of the the multi valence compound SnH4?

Answers

Stannane

~ Hope this helps!

describe the behavior of the molecules in a liquid. Explain this behavior in terms of intermolecular forces.

Answers

What are intermolecular forces?

The term “INTERmolecular forces” is used to describe the forces of attraction between atoms, molecules, and ions when they are placed close to each other.

In liquids, particles are quite close together and move with random motion throughout the container. Particles move rapidly in all directions but collide with each other more frequently than in gases due to shorter distances between particles.

In a liquid, intermolecular attractive forces hold the molecules in contact, although they still have sufficient KE to move past each other. Intermolecular attractive forces, collectively referred to as van der Waals forces, are responsible for the behaviour of liquids and solids and are electrostatic in nature.

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In a series circuit with 5 light bulbs if the battery has a current of 10 A how much current is in the first light bulb

Answers

Answer:

10A because they are series

how do i word a formal letter to a teacher saying i didn't pay attention during the science lessons and i now have no idea what to do? by the way, this is on edge so i haven't been on a call, or met my teacher in person.

Answers

Explanation:

Hello mr/mrs (name) I unfortunately couldn't pay attention to the class due to some issues I had therefore I don't know what we are doing in class

OR

Hello mr/mrs (name) I could understand what we were doing in class I would like it if you could break it down more or explain better to me

OR just say something it had something to do with your internet such as

Hello mr/mrs (name) I didn't understand what you were saying during our class due to some of my internet issues I was have throughout the day. I hope you can explain what we did during the class.

Those may be some of my excuses I've used before

they have worked for me:)

I don't know if that helped?:/

Solid iron pellets are heated, melted and drawn into wires. This is an example of a chemical reaction
True
False

Answers

Answer:

false

Explanation:

It is a physical reaction because it is being heated.

Answer:

False

Explanation:

Just because the iron was melted into wires does not mean that it isn't iron. It is still iron just in a different form.

6. In photosynthesis, plants use carbon dioxide and water to
produce oxygen and glucose. How many grams of water are
needed to produce 75 grams of glucose?
6 CO2 + 6 H2O → C6H12O6 + 6 O2
a. 45grams
b. 90grams
c. 108 grams
d. 180grams

Answers

The answer should we be 90 g
Oh you is you are in a serious I love you bye

Identify the element that can be found in the 5th period and 4th group on the Periodic Table.

As
Zr
Sn
V

Answers

it would be Zr (transition metals)

Should the organism be considered a life-form?

Answers

Answer:

It is a synonym for "life form". Organisms are classified by taxonomy into groups such as multicellular animals, plants, and fungi; or unicellular microorganisms such as protists, bacteria, and archaea. ... Fungi, animals and plants are examples of kingdoms of organisms within the eukaryotes.

So yes, it should

Explanation:

what is a rule for determining the mass number of an atom or ion​

Answers

Answer:

The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus.

sorry if im wrong

Explanation:

1. Why do scientists study fossils? *
(25 Points)
O a to learn how the planet was formed
O b. to study how organisms changed over time
O c. to observe how drought affected the landscape
O d. to understand how weathering affect rock layers

Answers

B is the correct answer


(e)
Calculate the mass of one atom of sodium.
Use the equation:
relative atomic mass
mass of one atom of sodium =
Avogadro constant
Avogadro constant = 6.02 x 1023
Give your answer to 2 significant figures

Answers

Answer:

3.82 × 10 ^-23 g

Explanation:

6.02 x 10^23atoms = 1 mole of sodium

1 atom = 1/(6.02 x 10^23) mole

mass = mole × molar mass

= 1/(6.02 x 10^23) × 23

= 3.82 × 10 ^-23 g

There are 12 inches in 1 foot and 2.54cm in 1 inch. How many feet are in 325 cm?

Answers

Answer:

27.0833 feet

Explanation:

PLEASE HELP ASAP IT URGENT!!!!!!!!

Answers

Answer: IT IS D

Explanation:

Your friend is describing an element that is commonly
found in household materials, malleable, and a good
conductor of heat and electricity. They say it is not very
reactive and is very similar to the other elements in its
group. Your friend's element is most likely which of these?
A. A transition metal
B. A noble gas
C. A halogen
D. An alkali metal

Answers

D. An alkali metal
yeah hope this helps

An element that is commonly found in household materials, malleable, and a good conductor of heat and electricity. They say it is not very reactive and is very similar to the other elements in its group as an alkali metal.

What is an alkali metal ?

All the elements listed in column 1A of the periodic table—hydrogen, lithium, sodium, potassium, rubidium, cesium, and francium—are classified as alkali metals. The fact that all of these metals contain one electron in their outermost layer of electrons binds them together.

The production of paper, detergents, and soap all need sodium hydroxide. In addition to being used as the electrolyte in alkaline, Ni-Cd, and Ni-MH batteries, potassium hydroxide is also used by farmers to make acidic soil more alkaline so that plants would grow better in it.

Vinegar, hydrochloric acid, and sulfuric acid are a few examples of the H = ion-containing compounds referred to as acids. Alkalis are a class of substances that feel soapy and contain the OH = ion.

Thus, option D is correct.

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5) A change in the chemical properties of a substance results in _________. *

a change of state
the same substance
a new substance

Answers

Answer:

a new substance

Explanation:

because it is chemival

Chemical change results in one or more substances of entirely different composition from the original substances.please mark brainliest if correct :)

why aren't granite, copper, or petroleum found everywhere on earths surface

Answers

Answer: The distribution of natural resources depends upon many physical factors like land, climate and altitude. The distribution of resources is unequal because these factors differ from place to place on this earth.

Many physical factors, such as land, climate, and altitude, influence the distribution of natural resources. Because these factors differ from place to place on this planet, the distribution of resources is unequal.

What is earth surface ?

The Earth's surface is defined as the part of the water or land that comes into contact with the air above it. The surface is the part of the Earth with which we interact. The crust is the rock layer that surrounds the Earth's mantle. The crust encircles the entire planet, including the ocean floor.

The crust is the planet's surface, where we live; it's actually a very thin layer, only 70 kilometers thick at its thickest point.

Petroleum is formed by the same geological process that creates sedimentary rock. The geological processes that create rocks and natural resources such as granite and copper do not occur everywhere on Earth and take a long time to form. This explains why granite and copper aren't found everywhere on the planet.

Thus, Because these factors differ from place to place on this planet, the distribution of resources is unequal.

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4. Which chemical formula below contains 2
different elements?
A. CO
B. Fe2O3
C. C2H4
D. All of the above

Answers

All of the formulas have two elements formula one has Carbon and Oxygen, Formula two has Iron and Oxygen, formula three has Carbon and Hydrogen.

The chemical formula of CO, Fe₂O₃, and C₂H₄ contain atoms of two different elements. Therefore, option (D) is correct.

What is the chemical formula?

A chemical formula provides information about the chemical proportions of atoms of each element that are present in a molecule or chemical compound. The chemical formula can be represented by using chemical symbols of elements, numbers (subscripts), and other symbols, such as commas, dashes, brackets, and plus (+) and minus (−) signs.

A chemical formula of a compound has no words but can be written in certain simple chemical structures. Chemical formulae can be more limited in power than chemical names and structural formulae. There are two kinds of chemical formulas in which one empirical formula and another molecular formula.

In the chemical formula of carbon monoxide (CO) has carbon and oxygen two different elements. In the chemical formula of iron oxide (Fe₂O₃)  iron and oxygen are two different elements. In the chemical formula of ethane (C₂H₄ ) has carbon and hydrogen two different elements.

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A sample of xenon gas occupying 10.0 mL is collected in a laboratory at 27°C and 1.25 atm. What is the volume of the gas at standard conditions?​

Answers

11.8 ml is the volume

Skill and
Serina is a ballet dancer. During her dance, she dances in a "Z" pattern on the stage. It takes her about 30 seconds to
complete the ®Z." The top and bottom of the "Z" are equal distances of about 3 meters each. The middle part of the "Z"
is about 6 meters long. How quickly (in meters per second) is she traveling during this part of the dance?

Answers

Answer:

2.5 m/s

Explanation:

total of 12 meters in 30 seconds

12x2.5=30

Glycerine is viscous than water?why​

Answers

Answer:

Yes

Explanation:

Why is glycerol more viscous than water?

The glycerine is more viscous than water because due to presence of hydrogen atoms , we all know that glycerine has more hydrogen bonding than water molecule , which makes an aggregation which means that glycerine is more viscous than water , in simple words glycerine can't flow as that of water molecule.

A popsicle melts on a table. Select ALL statements that are true. A The particles gained thermal energy and changed from a solid to a liquid B The particles lost thermal energy and changed from a solid to a liquid C A physical change occurred D A new chemical substance was made when it melted

Answers

Answer:

its "a" nd "C" Big Dawg if im wrong im sorry dawg been a min since i took a test like dis

Explanation:

How does ocean currents affect climate i need it in 8 sentences.

Answers

Ocean currents move both warm and cool water across many miles. Warm water can be carried to a cooler place like Alaska. It can bring warmer temperatures as well as warmer water to Alaska. Just like the warm water, cold water can do this as well. If cold water moves from Alaska to The Gulf of Mexico, it can cause the water and air to cool. As air travels over the ocean water vapor can condense into it. The current’s flow depends on what variables are in play. There are many different currents that connect together to heat up and cool off as they move.

Which of the following represents a polar covalent compound?
O2
CI2
NaCI
H2O

Answers

C) NaCl


~ Hope this helps!

(C.NaCl

it is the correct answer because this compound likes colder weather.

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