Answer:
Element- Aluminum
Element - Mercury
Compound - Ferrous Sulfate
Compound - Sucrose
Element - Carbon
Explanation:
Element: an element is a pure substance which is composed of only one type of atoms and that cannot be split or broken down into any simpler pure substance.
Examples of elements include:
Aluminum - it is composed of only atoms of aluminium. Each atom has 13 protons
Mercury - it is composed of only atoms of mercury. Each atom has 80 protons
Carbon - it is composed of only atoms of carbon. Each atom has 6 protons
Compound: a compound is a pure substance that is composed of two or more types of atoms (elements) in a fixed and definite proportion and that cannot be split into component elements by simple physical methods but only by chemical methods. Examples of compound include:
Ferrous sulphate: It is composed of atoms of Iron, Sulfur and Oxygen
Sucrose: It is composed of atoms of Carbon, Hydrogen and Oxygen.
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)
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 .
An overseas flight leaves New York in the late afternoon and arrives in London 8.50 hours later. The airline distance from New York to London is about 5.6x103 km, depending to some extent on the flight path followed. What is the average speed of the plane, in kilometers per hour to the correct number of significant digits?
Answer:
v = 658.82 km/h
Explanation:
The distance between New York and London is [tex]5.6\times 10^3\ km[/tex]
Time taken from New York to London is 8.5 hours
We need to find the average speed of the plane.
Total distance covered divided by the total time taken is equal to the average speed of an object. So,
[tex]v=\dfrac{d}{t}\\\\v=\dfrac{5.6\times 10^3\ km}{8.5\ h}\\\\v=658.82\ km/h[/tex]
So, the average speed of the plane is 658.82 km/h.
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
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.
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
Please help brainiest is award.
the blue one i think dont quote me on it. Dont hate
Answer:
Explanation:
2nd one
kinda hard to see it tho
Which of these are intensive properties? There can be more than one answer.
A) a substance has a density of 4.13 g/cm3
B) a substance has a melting point of 40°C
C) a substance is very malleable (it can be hammered into a shape)
D) a substance has a mass of 1.25 g
E) a substance has a volume of 5.4 mL
The intensive properties among the options provided are:
A) a substance has a density of 4.13 g/cm3
D) a substance has a mass of 1.25 g
E) a substance has a volume of 5.4 mL
Intensive properties are those that do not depend on the amount or size of the substance but are characteristic of the substance itself.
These properties, density, mass, and volume, are intrinsic to the substance and do not change with the quantity of the substance present. They are independent of the amount of the substance and remain constant regardless of the sample size.
On the other hand, melting point (B) and malleability (C) are not considered intensive properties. Melting point can vary depending on external conditions such as pressure, and malleability is influenced by the structure and composition of the substance, which can be affected by impurities or processing methods. These properties can change with the amount or size of the substance and are considered extensive properties.
Learn more about Intensive properties from the link given below.
https://brainly.com/question/13055036
#SPJ2
H3PO4 +CaCOH)2=Ca3(PO4)2+H20
Answer:
2H3PO4+ 3Ca(OH)2=Ca3(PO4)2+6H20
Please help I’ll give brainiest.
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
A beaker contains three solids: flour, sugar, and baking soda. Which
describes the contents of the beaker? *
Answer: It is a Heterogeneous mixture.
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.
PLZ HELP:Use the words below to complete the concept map
Answer:
1. Mixtures
2. Solutions
3. Heterogeneous
4. Sand-water
5. Salt-water mixture
6. Water
Explanation:
1. Indeed, Matter could exist and substances or Mixtures, which is also subdivided into two.
2. These substances can also be in the form of solutions.
3. Heterogeneous on the other hand refers to mixtures that are not totally uniform such as Sand-water.
4. Sand-water are good examples of Heterogeneous mixtures.
5. Salt-water mixture falls under the category of homogeneous mixtures as they are totally uniform.
6. Water is also an example of a homogeneous mixture because basically two elements Hydrogen and Oxygen combine uniformly to form water.
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.
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
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
the similarity between oxygen and carbon dioxide.
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).
Which one of the following elements does not have electrons in an f orbital?
A. Mercury
B. Lead
C. Cesium
Clarissa is conducting an experiment. She carefully measures out 15g of baking soda into a bag. She then carefully measures out 25ml of vinegar (which is equal to 25g), pours the vinegar into the bag and immediately seals it. She then watches as bubbles start to form and the bag fills up with gas. According to the Law of Conservation of Mass, how much should the bag weigh after the reaction has finished?
Answer:
10
Explanation:
subtract
According to the Law of Conservation of Mass, the bag should weigh 40g after the reaction has finished.
LAW OF CONSERVATION OF MASS:
The law of conservation of mass states that matter can neither be created nor destroyed.This implies that in a chemical reaction, the amount of reactants must equate the amount of products. In this question, Clarissa adds 15g of baking soda to 25g of vinegar in a bag, the resulting product will have a total mass of 25 + 15 = 40g, in accordance to the law of conservation of mass.Learn more at: https://brainly.com/question/24996173?referrer=searchResults
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
What are the three phases of matter
What are some characteristics of desert biomes ?
What is the number of neutrons in silicon-30
Answer:
16 neutrons
Explanation:
Why does dry ice scream when pushed onto metal?
Answer:
i thought you said dry ice cream
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.
The molar mass of silicon (Si) is 28.09 g/mol. Calculate the number of atoms in a 92.8 mg sample of Si.
Explanation:
one mole of any substance there are 6.022×1023 units of that substance. (This number is called Avogadro's number, NA.)
We need to convert the mass of silicon to moles using the molar mass of silicon, 28.06gmol. This number means that one mole of pure silicon would have a mass of 28.06g. Our given mass, however, is in milligrams; to convert this to grams we'll use the conversion factor 1g103mg:
5.86mg Si(1g103mg)=0.00586g Si
Now, using silicon's molar mass, we'll convert this mass to moles of Si:
0.00586g Si(1mol Si28.06g Si)=2.09×10−4mol Si
Finally, let's use Avogadro's number to convert
The number of atoms in a 92.8 mg sample of Si is 1.99×10²¹ atoms
From Avogadro's hypothesis, we understood that:
1 mole of Si = 6.02×10²³ atomsRecall,
1 mole of Si = 28.09 g
Now, we shall convert 28.09 g to mg. This can be obtained as follow:
1 g = 1000 mg
Therefore,
28.09 g = 28.09 × 1000
28.09 g = 28090 mgThus, 28.09 g is equivalent to 28090 mg
Therefore,
28090 mg of Si = 6.02×10²³ atomsFinally, we shall determine the number of atoms in 92.8 mg sample of Si. This can be obtained as follow:
28090 mg of Si = 6.02×10²³ atoms
Therefore,
92.8 mg of Si = [tex]\frac{92.8 * 6.02*10^{23}}{28090}\\[/tex]
92.8 mg of Si = 1.99×10²¹ atomsThus, 92.8 mg sample of Si contains 1.99×10²¹ atoms
Learn more: https://brainly.com/question/5809151
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:
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.