Answer:
Physical Change
Explanation:
Because the filter is removeing the dust by having the air go though a thin material.
Hope it helps!
Jamal is 8 miles away from his house. He rides his bike home toward home at a speed of 12 mph..
How far away from home is he after a half hour?
Answer: 2miles
Explanation:if he’s going 12 miles in one hour, in half an hour he would’ve made it 6 miles. 8-6=2
Answer: b. 2 miles
Explanation:
name one state of matter
Answer:
solid
Explanation:
Answer:
Gas
Explanation:
The overall reaction in a commercial heat pack can be represented as How much heat is released when 4.40 moles of iron are reacted with excess ? Heat = kJ How much heat is released when 1.00 mole of is produced? Heat = kJ How much heat is released when 1.60 g iron is reacted with excess ? Heat = kJ How much heat is released when 11.8 g and 1.20 g are reacted? Heat = kJ
Answer:
Explanation:
The overall equation for this reaction can be represented as:[tex]4 Fe(s) + 3 O_{2(g) } \to 2Fe_2O_{3(s)} \ \ \ \ \Delta H = -1652 \ kJ[/tex]
The first question says:
How much heat is released when 4.40 moles of iron is reacted with excess O₂?
Suppose 1652 kJ of heat is being emitted into the surroundings when four(4) moles of Fe reacted with O₂, therefore;
4.40 moles of Fe reacts with:
[tex]=\dfrac{4.40 \ moles \times 1652 \ kJ}{4 \ moles}[/tex]
= 1817.2 kJ of heat will be produced.
The second question says:
How much heat is released when 1.00 mole of [tex]Fe_2O_3[/tex] is produced?
Given that 1652 kJ of heat is being emitted into the surroundings when two(2) moles of [tex]Fe_2O_3[/tex] is produced, therefore;
1.00 moles of [tex]Fe_2O_3[/tex] reacts with:
[tex]=\dfrac{1.00 \ moles \times 1652 \ kJ}{2 \ moles}[/tex]
= 826 kJ of heat will be produced.
To the third question; we have:
How much heat is released when 1.60 g iron is reacted with excess O₂?
We need to find the number of moles of iron first.
We know that number of moles = mass/molar mass
Thus, the molar mass of iron = 55.8 g/mol
number of moles of iron = (1.60g) / (55.8 g/mol)
number of moles of iron = 0.02867 mol
Thus; [tex]\dfrac{0.02867\ mol \times 1652 \ kJ }{4 \ mol}[/tex]
= 11.84 kJ of heat is released.
The last question says:
How much heat is released when 11.8 g Fe and 1.20 g O₂ are reacted?
Again;
the number of moles of Fe = (11.8g) / (55.8 g/mol) = 0.2114 mole of Fe
Thus; [tex]\dfrac{0.2114\ mol \times 1652 \ kJ }{4 \ mol}[/tex]
= 87.31 kJ of heat is released.
On the other hand,
the number of moles of O₂ = (1.20g) / (32 g/mol) = 0.0375 mol of O₂
Thus; [tex]\dfrac{0.0375\ mol \times 1652 \ kJ }{3 \ mol}[/tex]
= 20.65 kJ of heat is released
Therefore, when these two(2) reactants reacted with each other, it is just the smaller amount of heat that would be released because oxygen tends to be the limiting reactant.
Imagine our class has discovered a new element and named it Berkmarium. Berkmarium is known to have 3 naturally occurring isotopes. In nature, 70% of the element is Berkmarium-95, 28% is Berkmarium-97, and 2% is Berkmarium-94. Which isotope will the average atomic mass of Berkmarum be closest to, and why? Support your answer with a calculation.
Answer:
Detail is given below.
Explanation:
Given data;
Abundance of Berkmarium-95 = 70%
Abundance of Berkmarium-97 = 28%
Abundance of Berkmarium-94 = 2%
Average atomic mass closer to which isotope = ?
Solution:
1st of all we will calculate the average atomic mass of Berkmarium.
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) + (abundance of 3rd isotope × its atomic mass) / 100
Average atomic mass = (70×95)+(28×97)+(2×94) /100
Average atomic mass = 6650 + 2716+ 188 / 100
Average atomic mass= 9554 / 100
Average atomic mass = 95.54 amu
The average atomic mass is closer to the isotope Berkmarium-95 because it is present in abundance as compared to the other two isotope. So this isotope constitute most of the part of Berkmarium.
All the elements in the universe heavier than Helium are/were created _______.
a.
during the Big Bang
b.
by stars
c.
by chemical reactions
d.
from Lithium
Answer:
B. by stars
Hopes this helps
Explanation:
PLZ HELP ME!!!!!!!!!!!!!!!
Answer:Graduated Cylinder
Explanation:
You use the water displacement test to find the volume of irregular shaped objects.
Answer:
Graduated Cylinder
Plz help! The best answer will be marked as brainliest!
Make a funny sentence for flammability and compounds for Magnesium
Here is an example for Mercury, it HAS to for Magnesium
“I love to travel but I do corrode aluminum so we won’t be flying off on adventures in airplanes planes anytime soon”
Answer:
This is hilarious, every time I ignite, they feed me water, little do they know this heat will defeat, and hydrogen only makes me stronger!
Explanation:
When Hg is burning, it uses the oxygen from H2O and turns it into hydrogen gas, and that contributes to the burning.
Use the following chemical equation to answer the question:
2 N2 + 3 H2 ⟶ 2 NH3
How many atoms of N (nitrogen) are present in the products?
1. 2
2. 3
3. 6
4. 9
2 atome nitrogen , 1 is correct
what type of reaction is
CuO + H2SO4 ➡️ CuSO4 + H2O
Question 3 (3 points)
(03.04LO)
Match the formula to the correct name. (3 points)
Column A
Column B
1.
Cas
a. Calcium sulfide
2.
CaSO4
b. Calcium sulfate
3.
CaSO3
C. Calcium sulfite
Answer:
Column A [tex]{}[/tex] Column B
1. CaS [tex]{}[/tex] Calcium Sulfide
2. CaSO₄ [tex]{}[/tex] Calcium sulfate
3. CaSO₃ [tex]{}[/tex] Calcium sulfite
Explanation:
1) Calcium sulfide is a compound formed between calcium, Ca, and sulfur, S, with a chemical formula of CaS. It forms cubic crystals similar to rock salt, and smells like rotten eggs
2) Calcium sulfate is a chemical compound consisting of calcium, Ca, and sulfate SO₄. It is found in nature in the hydrated form as the mineral gypsum
3)Calcium sulfite is a chemical compound formed between calcium, Ca and sulfite, SO₃ used to treat water and preserve food.
Answer:
the formula for calcium sulfite is CaSO3
the formula for calcium sulfate is CaSO4
the formula for calcium sulfide is CaS
Explanation:
According to the kinetic-molecular theory, what happens to a liquid when it is transferred from one container to another? The volume and the shape stay the same. The volume increases to fill the new container, but the shape stays the same. The volume stays the same, but the shape changes to fit the new container. The volume and the shape change to fill the new container.
Answer:
C, "The volume stays the same, but the shape changes to fit the new container."
Explanation:
i took the test & got this question correct.
Answer:
It's C
Explanation:
For Edge:)
Mangrove trees are affected by several factors. Which is an abiotic factor contributing to the energy cycle of a mangrove ecosystem?
Answer:
Just think of whats in a forest ecosystem
for example
Water
sunlight
tempreture
The abiotic factor that has been capable of contributing to the energy cycle of the mangroves has been climate.
Mangrove trees are the shrubs that have been found in the coastal regions. The trees have been capable of tolerating the harsh climatic conditions such as salty water, the flow of tides, etc.
The abiotic are the nonliving factors that has been capable of changing get resulting in the formulation of the ecosystem.
The mangroves have been capable to thrive in hard conditions. The abiotic factor that has been capable to affect the growth of the mangroves has been climate.
For more information about Mangrove trees, refer to the link:
https://brainly.com/question/7780978
what can you infer about an ion that has a negative charge?
I NEED HELP FAST FOR MY TEST!!!
Answer:
It has more electrons than protons. It is an anion.
is this correct? say something if it's wrong lol
Answer:
seFG9zuh98gufhIUAFIyhA*UGH8gguuguuuuuuuu
Explanation:
Answer:
Yes that look about right to me :)
Elements in columns with the same number of valence electrons are in the same___
Answer:
group
Explanation:
The periodic table also has a special name for its vertical columns. Each column is called a group. The elements in each group have the same number of electrons in the outer orbital.
When gold is hammered it "squishes". Iron Pyrite is
known as "Fool's Gold". It is not..........
like gold,
but shatter into many pieces when struck by a
hammer, Iron Pyrite is..........
Explanation:
When gold is hammered it "squishes". Iron Pyrite is
known as "Fool's Gold". It is not..........
like gold,
but shatter into many pieces when struck by a
hammer, Iron Pyrite is..........
Is combining water and powdered drink mix a chemical reaction? Construct an argument to support your claim.
Answer:No
Explanation:
It doesn't make a chemical reaction if u do that. Hope that helps!❤
Which statement best defines potential enregy?
A. Potential energy is stored energy.
B. Potential energy is energy that can change over time.
C.Potential energy is the energy of motion.
D. Potential energy is the type of energy a roller coaster uses.
Answer:
A. Potential energy is stored energy
Explanation:
Answer:
A
Explanation:
i have the same question
Single energy transformation
answer:
a change from one form of energy to another
explanation:
Practice Problem #2 - Frank has an eraser with a mass of 10g and a volume
of 15cm? What is its density? Show your work:
Answer:
The answer is 0.67 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question
mass = 10 g
volume = 15 cm³
We have
[tex]density = \frac{10}{15} = \frac{2}{3} \\ = 0.66666666...[/tex]
We have the final answer as
0.67 g/cm³Hope this helps you
all living things need energy to survive The most common source of energy is organisms is glucose molecules which are used as food a plant food is no exception where do plants get the carbon needed to make glucose molecules during the process of photosynthesis.
A. From the ground
B. From the air
C. From the water
D. From the sun
Answer:
the answer is air
Explanation:
Answer:
B. From the air
Explanation:
Why was periodic table developed
Answer:
The periodic table was created to organize the elements and provide physical and chemical properties, also to group with elements like it.
Hope this helps
Question 2 of 11
Which of these are part of a scientific way of gathering information?
A. Fairy tales
B. Religious beliefs
C. Investigations
D. Opinions
SUBMIT
Answer:
C
Explanation:
the rest arent scientific
Answer:
C. Investigations
Explanation:
Test approved
6.82
A 2.10-mole sample of crystalline acetic acid, ini-
tially at 17.0°C, is allowed to melt at 17.0°C and is
then heated to 118.1°C (its normal boiling point) at
1.00 atm. The sample is allowed to vaporize at.
118.1°C and is then rapidly quenched to 17.0°C, so
that it recrystallizes. Calculate AH° for the total pro-
cess as described.
Answer:
0 kj
Explanation:
melting/initial temperature = 17.0°c
boiling point = 118.1°C
pressure = 1.00 atm
2.10 mole sample of crystalline
attached below is the detailed solution required
MAJOR AMOUNT OF POINTS
What is the chemical formula of wood?
Answer:
C₆H₁₀O₅
Explanation:
In chemistry, we denote any molecule with carbons, hydrogens, and other elements combined together as organic compounds. This is where get get "Organic Chemistry" from.
Wood is going to be an organic compound.
Answer:
C₆H₁₀O₅
Explanation:
Calculate the density of an object with mass = 30.50 g and a volume = 2.20 cm^3
Answer:
The answer is 13.86 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question
mass = 30.5 g
volume = 2.2 cm³
We have
[tex]density = \frac{30.5}{2.2} \\ = 13.863...[/tex]
We have the final answer as
13.86 g/cm³Hope this helps you
Turtles are cold blooded meaning to use the sun to keep warm Austin a hypothesis the hospital prefer swimming in warm water he places his turtle on a rock in the middle of the bathtub and measures how much time the turtle spends off the rock doing a five minute. He conducts experiment on the four conditions in the bathtub no water warm water cold water and room temperature water in this experiment which is a control group
Answer:
Explanation:
This question is a little indirect but what should be noted is that the control group of any experimental research is the group that is not subjected to any form of treatment and is the first group in which the other groups (experimental groups) are compared to.
The control group in the experiment described in the question is the group placed in the bathtub with no water
A 40 g sample of sucrose contains 16.8 g of carbon. what is the mass
percentage of carbon in sucrose?
Answer:
Thus 100.00 g of sucrose contains 42.11 g of carbon, 6.48 g of hydrogen, and 51.41 g of oxygen; to two decimal places, the percent composition of sucrose is indeed 42.11% carbon, 6.48% hydrogen, and 51.41% oxygen.
Explanation:
Hope this helps, leave a heart ❤️
what does MA 2 means?
Answer:
Master-at-Arms Petty Officer 2nd Class. MA2. Machine Accountant Second Class (Naval Rating) Copyright 1988-2018 AcronymFinder.com, All rights reserved.
Explanation:
When the first periodic table of the elements was published, the elements were arranged by atomic mass. Although
several elements seemed out of order, later discoveries showed the order to be correct.
Which event most likely helped the development of the periodic table?
O Scientists changed the atomic masses to better fit the pattern.
O Scientists refused to consider other ways to organize the elements.
O New technology was developed that modified the masses.
O New information changed the understanding of the atom's structure.
ANSWER ASAP
