Answer: Jose is correct because air is a mixture of gases ( both elements and compounds).
Explanation:
An element consist of only one type of atom and a compound made up of 2 or more types of elements joined together ( by ionic or covalent bonds).
Whereas air around us is a mixture of gases (both elements and compounds) like nitrogen, oxygen, argon, and carbon dioxide, and very small amounts of other gases and water vapors
Hence, Jose is correct because air is a mixture of gases ( both elements and compounds).
please help me do this question.
true or false
1)In the chemical formula, lhe
species containing H* ion
acids and species containing
OH*ion are
base.
2) aqueous conductivity of all acid and base conduct electricity.
3) electrical conductivity of all and base are same.
4)the only way to test whether the sample is an acid or base is to see if it's melts something
Answer:
In chemistry, there are three definitions in common use of the word base, known as Arrhenius bases, Brønsted bases and Lewis bases. All definitions agree that bases are substances which react with acids as ... A ...
Acids are species with pH less than 7, while bases those with pH greater than 7. ... Using Arrhenius' definition, acids are those that produce the hydrogen ion when dissolved in water ( ) while bases produce the hydroxide ion ( ). These ions, when in water, act as charge carriers and can hence conduct electricity.
Acid–base reactions require both an acid and a base. ... For example, according to the Arrhenius definition, the reaction of B If inorganic, determine whether the compound is acidic.
Explanation:
I HAVE GIVE DIFINITIO FROM THAT YOU WRITE TRUE OR FALSE
Define pure substance and give an example
In the more general sense, a pure substance is any homogeneous mixture. That is, it is matter that appears uniform in appearance and composition, no matter how small the sample size. Examples of pure substances include iron, steel, and water. Air is a homogeneous mixture that is often considered to be a pure substance. (got the answer from google hehe)
Just like the terrestrial inner planets, which are made of rock and metal, the gas planets have solid surfaces covering mantles and cores.
A. True
B. False
Answer:
B. False
Explanation:
The gas planets are called so because they are composed of gases and solid materials. Therefore, they cannot have solid surfaces covering mantle and core as they cannot exist.
The molar mass of an element is numerically equal to:.
Answer:
the molar mass of an element is numerically equal to atomic mass in grams-
Which properties are characteristic of metalloids
Answer:
Tara is making a scrapbook using 24 photos and 8 newspaper clippings. She wants to put the same number of photos and clippings on each page. What is the greatest number of scrapbook pages Tara can make?
Explanation:
Tara is making a scrapbook using 24 photos and 8 newspaper clippings. She wants to put the same number of photos and clippings on each page. What is the greatest number of scrapbook pages Tara can make?
Answer:
The properties of metals as well as non metals is called metalloids.
What feature of Earth helps to stabilize our temperatures by keeping a balance of the right amount of the Sun’s light energy reaching us?
Answer:
The earth-atmosphere energy balance is achieved as the energy received from the Sun balances the energy lost by the Earth back into space. In this way, the Earth maintains a stable average temperature and therefore a stable climate. ... Shortwave radiation reflected back to space by clouds.
Explanation:
hope this helps have a good day
i made it easier to see the answer
Answer:Greenhouse effect
Explanation:
The greenhouse effect causes the atmosphere to retain heat
When sunlight reaches Earth's surface, it can either be reflected back into space or absorbed by Earth. Once absorbed, the planet releases some of the energy back into the atmosphere as heat (also called infrared radiation).
Is SO2 a ionic bond?
Answer:
Explanation:
So ,SO2 molecules are covalent. ... Covalent is two non-metals sharing electrons while Ionic is a metal and a nonmetal where one takes an electron and changes both of the elements charges for example Nitrogen and Oxygen would be covalent while Iron and Oxygen would be Ionic. So ,SO2 molecules are covalent.
Can someone help me with 14-16 fill in the blank
how many molecules of nitrogen dioxide are there in 2.00 moles of nitrogen dioxide ? Show steps please!
Answer:
2 moles of NO₂ contain 12.044 × 10²³ molecules of NO₂
Explanation:
Given data:
Number of moles of NO₂ = 2.00 mol
Number of molecules of NO₂ = ?
Solution:
It will be solve through Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ molecules
2.00 mole NO₂ × 6.022 × 10²³ molecules of NO₂ / 1 mol of NO₂
12.044 × 10²³ molecules of NO₂
Thus, 2 moles of NO₂ contain 12.044 × 10²³ molecules of NO₂ .
chemical reactions amplify 1.1 pre assessment
Chemical reactions are the various types of permanent changes which occur in substances and which produce new substances .
What are chemical reactions?Chemical reactions are changes which occur in the arrangement of atoms in a substance resulting in the formation of new substances.
There are many types of chemical reactions such as:
combination reactionsdisplacement reactionsdecomposition reactionsoxidation reactionsdouble displacement reactionsThe various types of chemical reactions that occur contribute to the numerous compounds and substance in existence today.
Learn more about chemical reactions at: https://brainly.com/question/26018275
What is the vertex of the parabola in the graph?
1
19
6
4
2
X
-6
-2
-2
-4
Answer:
(-3, -4)
Explanation:
The vertex is the point/dot that is in the middle of the graph. Imagine a vertical invisible line splitting the U in half, equal parts.
1. K + Cl2 —> KCI
Given: 180 g K and 120 g CI2
Answer:
A. Cl₂
B. 51.36 g K
C. 245.3 g KCl
Explanation:
Balance the given chemical equation
K + Cl₂ ⇒ KCl
2 K + Cl₂ ⇒ 2 KCl
A. To find the limiting reagent, first convert the mass of each reactant to moles. The molar masses are 39.10 g/mol for K and 70.91 g/mol for Cl₂.
(180 g)/(39.10 g/mol) = 4.60 mol K
(120 g)/(70.91 g/mol) = 1.69 mol Cl₂
Now, convert moles of each reactant to moles of the product. You can do this by using the mole ratio in the balanced chemical reaction. The reactant with the smallest moles of product is the limiting reagent.
(4.60 mol K) × (2 mol KCl/2 mol K) = 4.60 mol KCl
(1.69 mol Cl₂) × (2 mol KCl/1 mol Cl₂) = 3.29 mol KCl
Cl₂ is the limiting reagent.
B. You need to find out how much excess K you will have. Since Cl₂ is the limiting reagent, you will only make 3.29 mol of KCl. Convert this value to moles of K using the mole ratio.
(3.29 mol KCl) × (2 mol K/2 mol KCl) = 3.29 mol K
Now convert moles of K to grams. The molar mass is 39.10 g/mol.
(3.29 mol K) × (39.10 g/mol) = 128.64 g K
This is how much K will be consumed in the reaction. Subtract the total amount of K by the amount that will be consumed.
180 - 128.64 = 51.36 g
There will be 51.36 g of excess K.
C. You know that you will produce 3.29 mol of KCl based on previous calculations. Convert this to grams. The molar mass is 74.55 g/mol.
(3.29 mol) × (74.55 g/mol) = 245.3 g KCl
You will produce 245.3 g of KCl.
What is the number of neutrons in silicon-30
Answer:
16 neutrons
Explanation:
BALANCE THE EQUATION PLEASE 50 POINTS
Answer:
2C3H8S +13O2 =6CO2+8H20+2SO3
Answer:
ningwa answered it
Explanation:
get from (4,1) to (2,9) go up 8 and over 2 left (-2) - (4 - 2, 1 + 8), do this again (2 - 2, 9+8) and end up at (0,17) which is the y how do you change 7x+3y=3 into slope intercept form.
why stone is not a combustable and insolouble in water
Answer:
Stone does not have organic matter in it to burn in presence of air. Hence, it is a non combustible.
Rocks are quite bundled up together. Hence, they are very difficult to get mixed together.
Answer:
because stone is not have any holes to in the heat inside the stone and the water is dont have oxygen thats why the fire is not allowed to water
you need the heat oxygen and fuel to made a fire
HELP ASAPP WILL MARK BRAINLIST
Matter can be measured in many ways for specific purposes. Which measurement depends on the force of gravity and is not a reliable measurement?
A. Mass
B. Weight
C. Volume
D. Temperature
Answer:
A. Mass
Explanation:
Mass because ,mass is not a reliable measurement unlike the other ones.
what is the percent composition of sulfur in FeSO4
Answer:
36.8%
Explanation:
Ferrous sulfate has the composition 36.8% Fe, 21.1% S and 42.1% O.
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how many grams of ice can be melted with 15 j of heat
Answer: A 15-gram ice cube absorbs 5000 j of heat as it melts
Explanation:
Which elements can be found in SiCl4?
O sulfur and chlorine
O silicon and chloride
sulfur and chloride
silicon and chlorine
19. Which of the following is NOT a function of proteins?
a. provides structural support for cells
b. long term energy storage
c. speeds up reactions
d. movement and transportation
PLEASE ANSWER NOW!!!
A train travels 200 miles at an average speed of 50 miles per hour. How long does it take the train to travel this distance?
Answer:
The answer is 100 m/p/h because you divide the total 200 miles and the 50 speed and you get about 100 m/p/h
Explanation:
Can an acid be dilute and strong at the same time? Explain
Answer:
yes
Explanation:
Yes you can make the pH of a dilute strong acid higher than the pH of a weak acid. ... The lower the pH, the more is present in the solution. Strong acids like hydrochloric acid (HCl) almost completely dissociate into water to form ions. Weaker acids like ethanoic acid () only partially dissociates to form and ions.
what is chemicle reaction
Answer:
a process that involves rearrangement of the molecular or ionic structure of a substance as distinct from a change in physical form or a nuclear reaction
Explanation:
please mark brainlest
what type of plate boundary would form where there is a mountain range present, known earthquake activity, but no trenches present?
continental-continental convergent boundary
divergent boundary undersea
oceanic-oceanic convergent boundary
oceanic-continental convergent boundary
Answer:
continental-continental convergent boundary
Explanation:
When two continental plates converge, they smash together and create mountains. The amazing Himalaya Mountains are the result of this type of convergent plate boundary. The Appalachian Mountains resulted from ancient convergence when Pangaea came together.
Answer:
continental-continental convergent boundary
Explanation:
ay tone, if dis molten material pourin from da trade towa is aluminum, den how come dey ain't silva nor like a watery liquid?
Answer:
can you please type english?Explanation:
A piece of metal has a mass of 200 g and a volume of 2cm^3. What is its specific gravity?
a) 0.01
b) 2
c) 100
d) 400
A metal object has a density of 4 g/ml and is placed in a graduated cylinder
with 400 ml of water. The water rises to 416 ml. What is the mass of the
metal object?
Make sure to include the correct unit for your answer.
Answer:
Mass of metal = 64 g
Explanation:
Given data:
Density of metal = 4 g/mL
Volume of water = 400 mL
Volume of water + metal = 416 mL
Mass of metal = ?
Solution:
First of all we will calculate the volume of metal
Volume of metal = (Volume of water + metal) - volume of water
Volume of metal = 416 mL - 400 mL
Volume of metal = 16 mL
Mass of metal:
d = m/v
4 g/mL = m/ 16 mL
m = 4 g/mL ×16 mL
m = 64 g
Why does dry ice scream when pushed onto metal?
Answer:
i thought you said dry ice cream
car travels 67 miles at a speed of 45 mi/hr. How long did it take?
Answer:
Speed = Distance/time
Let's take 't' to be the time
45 = 67/t
45t = 67
t = 67/45
t = 1.48
How do reactants and products participate in a chemical reaction?
A. One reactant and one product react to form a new reactant and a new product.
B. The reactants are compounds that react to form new compounds (the products).
C. The products react with each other to form new compounds (the reactants).
D. A product is broken down in a chemical reaction to form reactants.
Answer:
B. The reactants are compounds that react to form new compounds (the products).
Explanation:
yessirski what he said is what im doing. Thanks, guys! #BrainlyPremium