Answers
Answer:
1. B
2.C
Explanation:
I just used logic, it's been a while since I've done this but right now I'm in Honors Chemistry and I think I have the qualifications to answer this question. Sorry if I'm wrong.
Related Questions
how many grams of sodium carbonate must react with 222 g of calcium chloride to make 233 grams of sodium chloride and 201 grams of calcium carbonate?
Answers
Answer: 212 g of sodium carbonate must react
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products formed must be equal to the mass of reactants taken.
In order to get the same mass on both sides, the atoms of each element must be balanced on both sides of the chemical equation.
The balanced chemical equation is:
[tex]Na_2CO_3+CaCl_2\rightarrow 2NaCl+CaCO_3[/tex]
Mass of products = mass of sodium chloride + mass of calcium carbonate = 233 g+ 201 g= 434 g
Mass of reactants= mass of sodium carbonate + mass of calcium chloride =x + 222 g
As the mass of reactants should be equal to mass of products
434 = x + 222 g
x = 212 g
Thus 212 g of sodium carbonate must react with 222 g of calcium chloride to make 233 grams of sodium chloride and 201 grams of calcium carbonate
2. If temperature
increases/decreases, then air pressure will
increase/decrease.
Answers
Answer:
true
Explanation:
the mass of the temperature changes as well so it'll decrease and increase
which substance will experience the greatest temperature change if 100J of energy is used to warm it? 100g of moist air, 100g of water or 100g of ice
Answers
Question
WHMIS legislation states that Material Safety Data Sheets:
A)are expired if they are more than 3 years old
B) must be available for workers to review
C)are expired if they are more than 5 years old
D )both a and be
E) both b and c
Answers
Answer: B) must be available for workers to review
Explanation:
WHMIS is a Canadian program which gives information to the employers about the workers knowledge about hazardous materials that are used in the workplace. It is ensured that the worker labelled the hazardous material at the workplace, material safety data sheet should be created to supplement the label, and worker's education program for learning the safety precautions is also conducted.
The material safety data sheets are created by the employers and their is no expiry date for such data for workers instead they receive a next recommended training date for participating in the training and avail another certification after the completion of first year.
which are exmaples of chemical change?
•baking cookies
• The statue of liberty's metal tarnishes from copper to green
• cold butter melts into liquid when heated
•salt is dissolved into freshwater
•Food scraps decompose into fertilizer in a compost pile
• frying changes the color and texture of an egg
•ocean water evaporates to water vapor on a hot day
•lighting a match
Answers
Answer:
cold butter melted when heated, lighting a match, baking cookies,
Explanation:
Clouds, precipitation, and _____ occur at frontal boundaries
Answers
Answer:
Hi! I think it's storms.
Answer:
I think evaporation
Explanation:
because clouds and precipitation are listed i am not entirely sure if I were u i would double check
2KClO3 → 2KCl + 3O2
How many moles of KClO3would it take to make 6.0 moles of O2?
a) 1.5
b) 9.0
c) 2.0
d) 4.0
Answers
God is GOOD AND arr you sure that is written properly
2 mol KClO3
6 mol O2 x ———————- = 4 mol KClO3
3 mol O2
What is meant by the dual wave-particle nature of light?
Answers
Dual wave particle nature of light can be regarded as mechanism that says light and matter will also has the properties of waves as well as that of particles.
This concept is found in mechanics as it describes how light and matter also has the properties associated with waves as well as particles.The duality explained inadequacy of conventional concepts of both wave and particle so as to give explanation about behaviour of quantum objects.the dual nature of light made us to understand that light has wave properties and it also has particle properties.Some of the properties of wave that light has are:
wavelengthspeedTherefore, duality means have both characteristics of light and wave
Learn more at,: https://brainly.com/question/14326678?referrer=searchResults
Calculate the new pressure if a 2300 mL of a gas at a pressure of 1.88 atm is allowed to contract to a volume of 2.21 L.
Answers
Answer:
V₂ = 0.958 atm
Explanation:
Given data:
Initial volume = 2300 mL (2300/1000 = 2.3 L)
Initial pressure = 1.88 atm
Final volume = (2.21 L + 2.3L) = 4.51 L
Final pressure = ?
Solution;
The given problem will be solved through the Boyle's law,
"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"
Mathematical expression:
P₁V₁ = P₂V₂
P₁ = Initial pressure
V₁ = initial volume
P₂ = final pressure
V₂ = final volume
Now we will put the values in formula,
P₁V₁ = P₂V₂
1.88 atm × 2.3 L = P₂ × 4.51 L
V₂ = 1.88 atm × 2.3 L / 4.51 L
V₂ = 4.32 atm.L / 4.51 L
V₂ = 0.958 atm
Why do rappers need umbrellas?
Answers
Maybe to not get rained on.
Hahhahahaha I ain't sure tho
Answer:
Fo' drizzle.
Explanation:
Miley partridge if you see this I am CJ and these hearts are for you ❤❤❤❤❤❤
Answers
Answer: not to be rude but who is Miley partridge? If she is a friend then u r a kind hearted person
Explanation:
Tritium (H-3) is a radioactive isotope of hydrogen with a half-life of 12.3 years. How long would it take for a 40.0g sample to decay down to 1.25g
Answers
Answer:
the answer maybe is 61.5 years (please check with others) tq
Explanation:
40/2=20
20/2=10
10/2=5
5/2=2.5
2.5/2=1.25
so one half life is 12.3 years
then 12.3 ×5 =61 .5
(why 5 ? because it decay 5 times to get 1.25 from 20)
Predict the balanced product for the acid base reaction of phosphoric acid with ammonium hydroxide.
Answers
Answer:
htt ps://w ww.you tube. com/watch?v =oyy377 Yoj4I
Explanation:
Explain in a short sentence how you can tell a reaction is a decomposition reaction.
Answers
Answer: A decomposition reaction occurs when one reactant breaks down into two or more products.
Mark me as brainilist pls
Please help... giving a lot of points and awarding brainliest.
Answers
Percent Yield: 67.4%
Theoretical Yield of C2H6: 6.50
Percent Yield: 88.7%
Theoretical Yield of HF: 3.84
Percent Yield: 71.4%
27. How was the design of the Chernobyl plant different than most modern reactors?
a. The containment building had a dome shape to minimize impact of explosion.
b. The plant was built close to a river to have a constant supply of fresh water.
c. Graphite was used instead of water as a moderator solution in the reactor.
d. The plant design was not significantly different than other reactors.
Answers
Answer:
I think its C
Im not sure tho hehe
On the periodic table, all of the elements in Group 1 are ____________
a) considered pure.
b) do not form chemical bonds.
c) have the same number of valence electrons.
Answers
Horsetails are helpful for treating
bee stings.
fevers.
urinary tract infections.
bleeding injuries.
Answers
Answer:
urinary tract infections. B
Explanation:
PWEaseee help mweee ill mark brainliest I just need the answer pls and thank you amazing people
Answers
Carbon dioxide (CO2) is a common compound made of
A)3 elements and a total of 3 atoms
B)2 elements and a total of 2 atoms
C)3 elements and a total of 2 atoms
D)2 elements and a total of 3 atoms
Answers
Please help If You Are Able To. Where do these go?
Answers
Answer:
Sorry can't help
Explanation:
Cant help!
What force pulled the solar system together out of a cloud of gas and dust
Answers
Approximately 4.5 billion years ago, gravity pulled a cloud of dust and gas together to form our solar system.
Have ya helped anybody out today, how? And good job!
Answers
Answer:
I helped take care of my baby cousin :)
Explanation:
What property of water makes it a good choice to use to cool down hot
material quickly ?
Answers
Answer:
Because of its high heat capacity, water can minimize changes in temperature. For instance, the specific heat capacity of water is about five times greater than that of sand. The land cools faster than the sea once the sun goes down, and the slow-cooling water can release heat to nearby land during the night.A student bought a 1.55-ounce chocolate bar and left it in a car on a hot day.
How many ounces of chocolate are in the melted bar?

A.
Exactly 1.55 ounces

B.
An unknown number of ounces

C.
At least 1.55 ounces

D.
Less than 1.55 ounces
Answers
Answer:
A. Exactly 1.55 ounces
The model represents a fluorine (F) atom
what is the mass of the atom
Answers
Answer:
19
Explanation:
The mass of an atom is given by its mass number. This is because the mass of an atom is concentrated at the nucleus.
Mass number = number of protons + number of neutrons
Protons and neutrons are the most massive particles in any atom.
Protons are the positively charged particles in an atom
Neutrons are uncharged particles.
So, the mass number of this atom is:
Mass number = 9 + 10 = 19
The contents of a bucket filled from a well were in a ____ stat. If the contents were heated up enough, they would change to a ____ state.
Answers
Answer: liquid state
A gas state
Explanation:
Which element has 7 valence electrons and 3 electron shells
Answers
Answer:
Halogens i think. hope this help
Explanation:
Convert 4.5 x 10-3 to standard Notation
Posted today at 6:30 am
1
=
Answers
Answer:
0.0045
Explanation:
Scientific notation is the way to express the large value in short form.
The number in scientific notation have two parts.
The digits (decimal point will place after first digit)
× 10 ( the power which put the decimal point where it should be)
for example 4.5×10⁻³
In standard notation
4.5 / 10³
0.0045
The expanded notation is standard notation of writing the numerical values which is normal way. The numbers are written as they are, without the power of 10.
under which conditions would the solubility of a gas be greatest
Answers
Answer:
when there is high pressure and low temperature then the solubility of a gas will be greatest.
Answer:
B
Explanation:
edg 2021
