Chemistry High School

help!!!!! please

there is no question just fill in the question marks

Help!!!!! Please There Is No Question Just Fill In The Question Marks

Answers

Answer 1
2 grams :) djdjdjdjsjwjdkndncp
Answer 2

Answer:

32 grams

Explanation:

Ignore the other answer. Two oxygen atoms have a mass of 32 grams. You can also arrive at this answer by subtracting the given values (i.e. 36 - 4 = 32).

Related Questions

It takes much less energy to change the temperature of oil than it does to change the temperature of water

Answers

Answer:

i think so

Explanation:

At STP, 1 liter of O (g) and 1 liter of Ne(g) have the same (1) Mass (2) Density (3) Number of molecules (4) Number of atoms I​

Answers

1 liter of O and 1 liter of NE have the same number of molecules.

WILL GIVE BRAINLIEST (major help!!! need now!!!) David observed properties of four different compounds, only one of which is an ionic compound. His observations are shown in the chart.


A 2-column table with 4 rows. The first column labeled compound has entries W, X, Y, Z. The second column labeled observations has entries is a hard solid, melts at 44 degrees C, has a molecular structure; is a brittle solid, does not conduct electricity in water, has a crystal structure; is a hard solid, conducts electricity, has a molecular structure; is a brittle solid, melts at 801 degrees C, has a crystal structure.

Which is most likely the ionic compound?


W

X

Y

Z

Answers

Answer:

B. X

Explanation:

Answer:

The answer is D

Explanation:

Wave W is being diffracted, Wave X is being reflected, and waves Y and Z are being refracted.

What is the "mass number"? What does the mass number tell you?

Answers

Total number of protons and neutrons in the atomic nucleus. When you see a periodic table the order is usually the atomic number, the element symbol, the name, and then the atomic mass.

why should scientists perform expierements

Answers

Answer:

Experiments are most useful when investigating predictions derived from explicit theories, and it is theories, rather than experimental results, that are properly used to explain features of natural settings.

Answer:

to explore new possibilities

hope it helps

true or false: Fungi are able to carry out photosynthesis, similar to plants

Answers

Answer:

false

Explanation:

Answer:

FALSE ...

Explanation:

However, unlike plants, fungi do not contain the green pigment chlorophyll and therefore are incapable of photosynthesis. That is, they cannot generate their own food — carbohydrates — by using energy from light. This makes them more like animals in terms of their food habits

What is the correct name for the following compound? "Make sure you are using correct naming
rules"

Answers

Answer:

c

Good luck on your assessment!

I’d say either a or c

Which of these is an example of a biotic factor?
hot desert sun
Mojave River
acrid desert air
Mojave grasshoppers

Answers

Answer: Mojave grasshopper

Explanation: this is the answer because it is living

Answer: Mojave Grasshopper

A biotic factor is something that it living. An abiotic factor is something that is nonliving. The only object that is living in the choices is the grasshopper. :)

Convert 27 degrees Celsius to Kelvin
OOK
300 K
O 27K
327 K

Answers

Answer:

300 K

Explanation:

add 273 to change to kelvin

plz mark as brainiest

is combustion an example of the law of conservation of matter and why?

Answers

Answer:

Explanation:

The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. For example, when wood burns, the mass of the soot, ashes, and gases, equals the original mass of the charcoal and the oxygen when it first reacted.

1. Which of the following equations is balanced?
a. Al + Br2- 2A1Br3
b. 2Al + 2Br2 → 3AlBr3
c. 2Al + 3Br2 → 2AlBr3
d. Al + Br2 → AlBr3

BRAINLIEST BRAINLIEST
please answer I’m trying to work with 0 hours of sleep :)

Answers

The answer would be A

What are ionic compounds ​

Answers

ionic compound is a chemical compound composed of ions held together by electrostatic forces termed ionic bonding

Please answer correctly !!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!

Answers

It’s A or B but liquids take the shape of their container so I bet you it’s B

Which of the following does NOT agree with the Law of Conservation of Mass?
A. Mass can be destroyed.
B. Matter cannot be created.
C. Mass prior to chemical change is the same as mass after chemical change.​

Answers

Matter cannot be created.

mass prior to chemival change is. thesame as mass after chemical change

All objects have mass
O True
O False

Answers

The answerrrrr is truw

An atom has 24 protons, 22 electrons, and 28 neutrons. What is the ATOMIC # of the atom?

Answers

22 would be the answer

A bottles contains 3.100 mL of a liquid. The mass of the liquid is 2.060 g. What is the density of the liquid? (BE SURE TO
SHOW ALL THREE PARTS: EQUATION, WORK, AND PROPER FULL ANSWER.

Answers

Answer:

0.66 g/mL

Explanation:

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

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

From the question we have

[tex]density = \frac{2.06}{3.10} \\ = 0.664516..[/tex]

We have the final answer as

0.66 g/mL

Hope this helps you

How many atoms of each element are in the chemical formula Ca(OH)2? ​

Answers

1 calcium, 2 oxygen, and 2 hydrogen. :)
Calcium hydroxide, Ca(OH) 2 consists of one calcium atom (A r = 40), two oxygen atoms (A r = 16) and two hydrogen atoms (A r = 1).

Please help❤️

Explain what is meant by noble gas envy.

Answers

Answer:

a phrase that describes how elements what do be stable and non reactive like the noble gas elements are.

What type of compound is this?

Answers

Answer:sorry id ont known

Explanation:give m brianlest if you want

Which of the following is an intensive property?

Mass
Magnetism
Shape
Volume

Answers

Answer:

I believe its A. Mass

Explanation:

An intensive property is a property of matter that depends only on the type of matter in a sample and not on the amount. For example, the electrical conductivity of a pure substance is a property that depends only on the type of substance. Silver, gold, and copper are excellent conductors of electricity, while glass and plastic are poor conductors.. Other intensive properties include color, temperature, density, and solubility.

Answer:

B. Magnetism

Explanation:

Hope this helps! :))
Sorry for late answer

Waves often bounce off objects such as water. What is this form of wave movement called?
A.
reflection
B.
refraction
C.
interference
D.
resonance

Answers

Answer:

Reflection

Explanation:

Reflection is when something is bounced off something else such as light bouncing off objects therefore the waves are reflecting. Also when light bounces off of a surface it reflects rather than refraction which refers to the light bending as it enters a new medium

Which is larger potassium or bromine

Answers

Answer:

potassium.

Explanation:

located at start of period 3, will have larger radius

Answer:

bromine

Explanation:

In if the reaction below 49 grams of Fe3O4 produces a 78.25% yield of Fe. How many grams are produced? Fe3O4 + 4H2 = 3Fe + 4H2O
Imagine the = is an arrow

Answers

Fe produced : 27.53 g

Further explanation

Reaction

Fe₃O₄ + 4H₂ = 3Fe + 4H₂O

mol Fe₃O₄ (MW=233.55 g/mol) :

[tex]\tt \dfrac{49}{233.55 g/mol}=0.21[/tex]

mol ratio Fe₃O₄ : Fe = 1 : 3, so mol Fe :

[tex]\tt 3\times 0.21=0.63~g/mol[/tex]

mass Fe(Ar=55,845 g/mol)

[tex]\tt 0.63\times 55,845=35.18~g[/tex]

grams produced :

[tex]\tt \%yield=\dfrac{actual}{theoretical}\times 100\%\\\\actual=\%yield\times theoretical\\\\actual=78.25\%\times 35.18\\\\actual=27.53~g[/tex]

Are the atoms really "sharing" electrons

Answers

No they are donating them

In the following reaction, which element or compound is the oxidizing agent?

I NEED HELP ASAP ​

Answers

Answer:

[tex]O_{2}[/tex] is the oxidizing agent

Explanation:

An oxidizing agent is an element in a reaction that accepts the electrons of another element. It is typically hydrogen, oxide, or any halogen. In this case, it is oxygen. The answer is 02.

Answer:

i think it's 02 i might be wrong

Explanation:

A radio station transmits to a receiving antenna. The radio wave sent is a

a.
surface wave
b.
torsional wave
c.
longitudinal wave
d.
transverse wave

Answers

longitudinal

all sound waves are longitudinal

the answer is c , i took this while back

define the term osmosis in your OWN words

Answers

Answer:

Osmosis is a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one equalizing the concentrations on each side of the membrane.

Explanation:

Which observations is the best evidence that unknown liquid X is a composed of only pure substance

Answers

Answer:

A substance that is composed only of atoms having the same atomic number is ...  36 grams of an unknown liquid at its boiling point,.

What is the volume of 80.0 g of ether if the density is 0.70 g/ml

Answers

I need to find the x pls help and show work 73838
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