Chemistry High School

Please Help !! Brainliest !! ​

Please Help !! Brainliest !!

Answers

Answer 1
Answer:

Data supports significantly because we can use the testing(depending sample) before and after we use the same object to test the hypothesis.

Related Questions

is the cause of rapid oxidation explosion

Answers

Rapid oxidation results in burning of a material or even an explosion. It happens rapidly and produces light and noticeable heat. Combustion or burning is rapid oxidation. But combustion can also refer to rapid burning where oxygen is not involved

A compound is always made up of the same ____ in the same proportions.

Answers

Answer:

elements

Explanation:

A compound always consists of the same elements in the same ratio. If the same elements combine in different ratios, they form different compounds

In a chemical formula what is used to indicate the number of atoms of each element

Answers

Answer:

molecular number

Explanation:

because it shows exact numbers

Which of the following are an example of a polysaccharide?

A.starch
B.chitin
C.cellulose
D.sucrose

Answers

Examples include storage polysaccharides such as starch, glycogen and galactogen and structural polysaccharides such as cellulose and chitin. Here's the answer, but I think it's A

The change of matter, solid, liquid and gas is called a_________.

Answers

Answer:

This would be a phase change

Explanation:

Since the diffrent phases solid,liquid,gas are changing to other phases.

Sorry for the bad explanation.

What is the density of a rectangle solid with dimensions
of 15 cm x 25 cm x 5 cm and has a mass of 3000 g?

Answers

Answer:

5625000gm/cm^3

Explanation:

volume=w*h*l=25*15*5=1875cm^3

density=mass*volume

=1875*3000

=5625000gm/cm^3

An atom contains 22 protons and 26 neutrons. What is its atomic number?

Answers

Answer:

the atomic number is 22

Explanation:

titanium is 22 on the periodic table. the amount of protons is the same as the atomic number

Answer:

22 :)

Explanation:

Can someone help me find the 5 digits numbers in here?

Answers

Answer:

20322

Explanation:

Could it have something to deal with the teeth or mouths? The first pumpkin you have two teeth, second pumpkin looks like a 0, the third pumpkin I’m unsure of. The forth pumpkin has two teeth again same with the fifth.

So first pumpkin - 2
The second pumpkin - 0
The third pumpkin I’m unsure of
The forth pumpkin - 2
The fifth pumpkin - 2
So 20?22

Just an idea for ya. Hopefully it helps

You pour some juice from a short, wide glass into a tall, narrow glass. What happens to the volume of the juice? Explain your reasoning.

Answers

Answer: the volume increases

Explanation: It increasses because the volume is how tall it is

The volume stays the exact same. It just takes on a different shape because that is, by definition, what a liquid does. It assumes the shape of the container. It does not increase in volume. The other guy is beyond incorrect

Oxygen and silicon makes up what percentage of the Earth crust.
A) 57% B) 98.5% C) 75% D) 50%

Answers

answer

the answer is C

explanation

this is because the oxygen makes up 46.1%of the earth's surface while silcon is 28.5% and the question says "what makes up" which means you should add them and it becomes 74.6% which Is approximately 75%

Which of the following will Float on pure water?
оа
Ob
A substance with a mass of 1.33 g. and a volume of 1.38 ml.
A substance with a mass of 534.23 grams and a volume of 522.3 mL
A substance with a volume of 436.2 mL and a mass of 4180.23 g.
A substance with a volume of 3.35 mL and a mass of 22.64 g.
ос
Od

Answers

Answer:

ob

Explanation:

becoz when volume increases density decreases.

How is particle motion related to thermal equilibrium?

Answers

Answer:

With billions of moving particles colliding into each other, an area of high energy will slowly transfer across the material until thermal equilibrium is reached (the temperature is the same across the material).

Ecology is defunded as the environment study of

Answers

Answer:

sicoligy

Explanation:

this answer was wrong sorry

HHHEEEEELLLPPP MMMEEE
Travis is warming up before basketball practice. Which of these activities would provide the best dynamic stretch to prepare him for sprinting?

Forward bends
Arm rotations
Neck extensions
Leg swings

Answers

Answer:

Leg swings sounds good but not to sure

Explanation:

I mean in order to play basketball gotta warm up your legs

Answer: Leg swings

Explanation: Leg swings would be best for preparing to sprint because you will have to move you legs very quickly, and leg swings would be a good warm up without tiring yourself out.

Predict the charge on the monatomic ions formed from the following atoms in binary ionic compounds:
(a) I
(b) Sr
(c) K
(d) N
(e) S
(f) In

Answers

i think the answer to this would be f

Make a claim about whether air is matter and whether light is matter. Support your claims with evidence and explain your reasoning.

Answers

Answer: air is matter, it has mass and it takes up space

I WILL GIVE YOU BRAINLIEST!!!

Answers

Answer:

The second option

Answer:

Intent to cause harm

which can occur in a physical changen?
​

Answers

Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density.

help me out pls (image attached)​

Answers

Protons:13
neutrons:14
electrons:10

Convert the following: 100 hg(hectograms) to g(grams)
a. 10,000 g
b. 10 g
c. 1 g
d. 100 g

Answers

Answer:

A

Explanation:

10,000g

just multiply the amount of hectograms by 100 to get grams

The answer is A, 10,000g

What is the melting point of the above substance?

Answers

There is no substance there.. can you elaborate? I’ll answer in the comments

A student finds a rock on the way to school. In the laboratory he determines that the volume of the rock by placing the rock in a graduated cylinder with 50 mL of water and watched the water rise to 72.7 mL. The student determined the mass is 39.943 g through the use of a triple beam balance. What is the density of the rock?

Answers

Answer:

1.76 g/mL

Explanation:

You need to find the volume.  You can do this by subtracting the volume of the water and the rock by the volume of the water.

72.7 mL  -  50 mL  =  22.7 mL

Now that you have volume, divide the mass by the volume to find the density.

39.943 g/22.7 mL = 1.76 g/mL

Which describes the letter that belongs where the question mark is?

Answers

Answer:

C

Explanation:

Took the test

Green light has a frequency of 6.01 x 1024 Hz. What is the wavelength?

Answers

Answer:

λ= 4.99 * 10^-17

Explanation:

C= F * λ

F= frequency(Hz)

λ= wavelength(m)

C= 3.0 * 10^8

F= 6.01 * 10^24

λ= ?

3.0 * 10^8= (6.01 * 10^24) λ

***Simplify

λ= 4.99 * 10^-17

Solution ,colloid ,or suspension

Answers

Answer:

colloid

Explanation:

i think she making meth in her basement

Colloid lol that woman is crazy

How cations can become neutral atoms?​

Answers

A neutral atom contains the same number of electrons as protons and that means that the electric charge of the atom is neutral or otherwise known as zero. However, if a particular atom loses an electron, the atom becomes positively charged because there is more protons than electrons.
THIS IS CALLED A CATION.
hope this helps x

Answer:

By gaining elections

Explanation:

Cations are formed when neutral atoms loss electrons and when they gain back the lost electrons the charges are neutralized.

Eg. Cu=Cu2+ + 2é

Cu2+ + 2é=Cu

The amount of matter inside an object is called what?

Answers

The amount of matter inside an object is called the object’s mass.
The answer is an object mass.

wave has a frequency of 5hz and a wavelength of 25 m/s.
what is the speed of the wave

Answers

Answer:

125m/s

Explanation:

speed= wavelength×frequency

= 25×5

=125

The speed of the wave will be 125 m/s.

What is speed?

The magnitude of an object's rate of change of position with time, or the magnitude of change of position for each unit of time, is its speed; it can be considered as a scalar quantity.

Speed = wavelength × frequency

Calculation of speed is shown below:

It is given that wavelength = 25 m/s, frequency = 5 hz.

Speed can be calculated by using the formula:

Speed = wavelength × frequency

speed = 25m/s × 5 hz

speed = 125 m/s

To know more about speed.

https://brainly.com/question/7359669.

#SPJ2

Match each element with the element that is most similar to it. If you don’t know the answer, use this periodic table to help you make your best guess.


Drag the tiles to the correct boxes to complete the pairs...

Answers

Answer:

Lithium - Potassium

Carbon - Silicon

Fluorine - Bromine

Oxygen - Sulfur

Explanation:

I hope this helps!! :3

Which is more scientific, what is the air made out of? or why is there air?

Answers

Answer:

why is there air

Explanation:

it sounds more smarter and sounds like something someone would want to know

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