Answer:
7 cm^3
Explanation:
Density = Mass/Volume
5 = 35/x
multiply both sides by x to get
5x = 35
then divide by 5
so x = 7 cm^3
Which of the following are products of combustion?
liquid and solid water
newly discovered elements
additional atoms
heat and light
The answer option which are products of combustion is: D. Heat and light.
In Chemistry, there are five (5) main types of chemical reaction and these include;
Combination reaction.Double-replacement reaction.Decomposition reaction.Single-replacement reaction.Combustion reaction.A combustion reaction can be defined as an exothermic chemical reaction between physical substances, usually in the presence of oxygen and hydrocarbons to produce heat, light and carbon.
An example of a combustion reaction is the burning of forest trees and plants.
In conclusion, the products of combustion are heat and light.
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Answer:
heat and light
Explanation:
Hi! I could use some help, I need to turn this in today
Each of these Ionic Compounds are named INCORRECTLY.
1. Find and describe the mistake
2. Correctly name the compound.
CaCl2 - Calcium Chlorine
CuS - Copper Sulfide
Li3P - Trilithium Phosphide
CuBr - Copper(II) Bromide
NaOH - Sodium Hydrogen Oxide
Explanation:
The nomenclature of ionic compounds is given by:
1. Positive is written first. And if the metal atom has various oxidation states then its oxidation state is to be mentioned in brackets with help of roman numbers
2. The negative ion is written next and a suffix is added at the end of the negative ion. The suffix written is '-ide'.
1.) : Calcium chloride (Correct)
In the given compound, calcium has oxidation state of +2 and chlorine has oxidation state of -1.The name is correct.
2.) : Copper (II) oxide (Incorrect)
In the given compound,copper has the oxidation state of +1 and oxygen has oxidation state of -2.So ,the correct name will be Copper (I) oxide.
3.) : Lead (II) sulfide (Incorrect)
In the given compound, lead has the oxidation state of +4 and sulfur has oxidation state of -2. So ,the correct name will be Lead (IV) sulfide.
what are 5 different bases for birds
Answer:
adenine, guanine, cytosine, thymine, and uracil
hii thank you for helping me for that question please give me now this question define the air polution
Answer:
A mixture of solid particles and gases in the air.
Explanation:
Air pollution is a mixture of solid particles and gases in the air. car emissions, chemicals from factories, dust, pollen and mold spores may be suspended as particles. Ozone, a gas, is a major part of air pollution in cities. When ozone forms air pollution, it's also called smog.
Air pollution can be defined as the presence of toxic chemicals or compounds (including those of biological origin) in the air, at levels that pose a health risk. In an even broader sense, air pollution means the presence of chemicals or compounds in the air which are usually not present and which lower the quality of the air or cause detrimental changes to the quality of life (such as the damaging of the ozone layer or causing global warming).
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true or False
sound needs a medium to travel
Answer:
True or T
Explanation:
Is the correct answer please make me brainliest
Please I will mark brainliest !!! I need both answered
What does the graph show about the rate of temperature change over time?
Answer:
The temperature is the same overtime.
Explanation:
Since the line on the graph is straight the temperature will be constant.
Someone pls help me I will make you brain
Answer:
Thanks but I already have a brain LOL.
Your answer is D cooler temperatures.
Melting permisfrost actualy is a source of greenhouse gas because it realeses water which could in turn be vaporized eventualy.
I have nothing to say hear look at picture sorry
Answer:
D
Explanation:
Hope it helps :p
can you make hydroxychloroquine from grapefruit and lemon rinds
Hydroxychloroquine cannot be made from grapefruit and lemon rinds.
Hydroxychloroquine is not a natural compound, rather it can only be synthesized from quinoline molecule in the laboratories.
During the synthesis of hydroxychloroquine, several sequential chemical reactions and purifications are done.
Hydroxychloroquine is used in the treatment of:
malariasystemic lupus erythematosus, rheumatoid arthritisBut when grapefruit and lemon rinds are boiled in water, a natural chemical compound known as limonene is obtained.
Therefore, hydroxychloroquine cannot be made from grapefruit and lemon rinds,
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I will make you brainless answer this 1 question pleaaeeee!b
In a beaker, 300 grams of water at 80°C cools down to 20°C. Assume all the heat from the water is absorbed by 100 cubic meters of air, with a mass of 100.000 grams . What is the temperature change in the air?
Answer:
mass of water, mw = 300g = 0.3kg
∆Tw = (80 - 20) °C
volume of air, va = 100m³
mass of air, ma = 100g = 0.1kg
∆Ta = ?
H = mc∆T
Hw = mwcw∆Tw
Hw = 0.3*4200*60
Hw = 75600J
Hw = 75.6 kJ
All the above heat energy got absorbed by air,
that is; Ha = 75600J
since it's given that the heat was absorbed by a specific amount of volume of air
then specific capacity of volume of air is
then,
ca = Ha × density
ma temp
then,
Ha = vaca∆Ta
where, ca = volumetric heat capacity of air = 0.012kJ/m³°C
75.6kJ = 100m³ × 0.012kJ/m³°C × ∆Ta
75.6 = 1.2/°C × ∆Ta
∆Ta = 63°C
63°C is the temperature change in air.
Find the number of protons, neutrons, and electrons for hydrogen-1, hydrogen-2, and hydrogen-3 respectively.
Answer:
Protons Neutron Electrons
hydrogen-1 1 0 1
hydrogen-2 1 1 1
hydrogen-3 1 2 1
Explanation:
hydrogen-1, hydrogen-2, and hydrogen-3 are all isotopes.
Isotopes have the same number of protons but a varying number of neutrons. Protons = Electrons.
which of the following controls all the activities which go on in the cell
Answer:
That would be the necleus! I hope this helps you! :)
Give an example of one pro and one con for the use of stem cells in medicine.
Answer:
pro ca help defeat diseases, con the stem cell might cause harm
Explanation:
The stem cells are used in regenerative medicine to reproduce the body organs and replace the damaged orangs. The disadvantage of stem cells is that it is difficult to culture the stem cells, and they can be transformed into cancerous cells.
What are stem cells?Embryonic stem cells can be described as pluripotent stem cells derived from the inner cell mass of a blastocyst. Human embryos can reach the blastocyst stage 4 to 5 days post fertilization, at which time they contain 50 to 150 cells.
Isolating the inner cell mass using immunosurgery results in the destruction of the blastocyst, a process that raises ethical issues, at the pre-implantation stage have the same moral considerations as embryos in the post-implantation stage of development.
Potential uses of stem cells include the treatment of diabetes and heart disease. The cells are being analyzed or studied to be used in clinical therapies, genetic disorders, and cellular/DNA repair. However, adverse effects in the research processes and clinical processes such as tumors and unwanted responses have been reported.
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Arrange in the correct order of occurrence. Write 1 – 5 for each statement.
___ Magma cools and sinks.
___ Rocks are heated and melt.
___ Magma expands and rises at divergent boundaries.
___ Some magma move sideways in opposite directions.
___ Subduction in convergent boundaries make plates to reach the mantle
Answer:
Explanation:Rocks are heated and melt.
Some magma move sideways in opposite directions.Magma cools and sinks.Magma expands and rises at divergent boundaries.Magma expands and rises at divergent boundaries.
in structural isomers atoms and functional groups join together in different ways. which of the following statements is not correct with respect to structural isomers
Structural isomerism is based on the existence of different molecular
structures formed by the same elements.
The statement that is not correct with respect to structural isomers is; All
structural isomers show hydrogen bonding.
Reason:
Structural isomers are isomers that have different molecular structures but
the same molecular formula. They are referred to as constitutional isomers
Therefore;
The empirical formula which is obtainable from the molecular formula is the same for structural isomers.The structural formula of structural isomers are differentStructural isomers that are functional isomers have different chemical properties.However;
Structural isomers that are linkage isomers may not have hydrogen bonding.Therefore, the statement that is not correct with respect to structural isomers is; All structural isomers show hydrogen bonding.
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The question options are;
The same empirical formula among structural isomers.
Different physical and chemical properties can be possessed by structural isomers.
Structural isomers have different structural formulas.
Hydrogen bonding is shown in all structural isomers.
All the above statements are correct.
DO the following conversion
Answer:
Kim Sam Mi Da!!
Explanation:
Da Mi Sam Kim!!
Assume that wave B has a wavelength of 415 nm. Calculate the frequency of the wave. The value for c is 3.00 x 10 8 m/s. The wavelength of wave A is [__________]Hz.
The wave B has wavelength of 415 nm. The value for c is 3.00 x 10 8 m/s. The frequency is 7.22 x 10¹¹ Hz.
What is frequency?Frequency is defined as the number of waves passing through a fixed point in a given amount of time.
The frequency can also be defined as a repeated event is the number of occurrences per unit of time.
Frequency can be expressed as
f = c / ∧
Where c = 3.00 x 10⁸ m/s
∧ = 415 nm
So, f = 3.00 x 10⁸ m/s x 415 nm
f = 7.22 x 10¹¹ Hz.
Thus, the wave B has wavelength of 415 nm. The value for c is 3.00 x 10 8 m/s. The frequency is 7.22 x 10¹¹ Hz.
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2.What two factors must be held constant for density to be a constant ratio?
Answer:
Temperature and Pressure
Explanation:
Temperature and pressure cause change in volume.
So any change in volume will alter the ratio of density as given by equation of density.
Density = mass/ volume
Change in volume will alter the ratio.
Kindly mark it branliest if the answer is little bit satisfying.
The two (2) factors which must be held constant for density to be a constant ratio are:
I. The temperature of a sample or physical substance.
II. The pressure around the sample or physical substance.
Density can be defined as mass all over the volume of of a sample or physical substance.
Basically, density is mass per unit volume of of a sample or physical substance.
Mathematically, the density of a of a sample or physical substance is given by the formula;
[tex]Density = \frac{Mass}{Volume}[/tex]
The density of a sample or physical substance is directly proportional to pressure and inversely proportional to temperature.
This ultimately implies that, an increase in pressure with temperature being constant would cause an increase in density and vice-versa.
Conversely, a decrease in temperature with pressure being constant would cause an increase in density and vice-versa.
In conclusion, a change in volume of a substance is caused by both temperature and pressure.
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How much heat is needed to raise the temperature of 100g of an iron from 25°C to
110°C?
(The specific heat of iron is 0.45 J/g∙°C).
Answer:
382.5J
Explanation:
Use the formula:
E = mcΔθ or Q = mcΔT
m = 100g
c = 0.45 J/g°C
ΔT or Δθ = 110 - 25 = 85°
Sub in the values:
E = 100 × 0.45 × 85
= 382.5J
what are homologous series
Answer:
A homologous series is a series of compounds with the same general formula, usually varying by a single parameter such as the length of a carbon chain. Compounds within a homologous series typically have a fixed set of functional groups that gives them similar chemical and physical properties.
Ionic bonds form between which two types of elements?
Answer:
Ionic bonds usually occur between metal and nonmetal ions. For example, sodium (Na), a metal, and chloride (Cl), a nonmetal, form an ionic bond to make NaCl.
Explanation:
Answer:
metal and nonmetal ions
Explanation:
what type of mixture is formed when black iron filings and yellow sulfur powder black iron filing is formed
Homogeneous
Heterogeneous
Compound
Answer:
when you heat the blend, you form iron sulfide, a compound
Depending on the ratio, you could form Fe4S3 or fool's gold
Explanation:When iron filings and sulphur powder are mixed and heated they undergo a chemical reaction and form ferrous sulphide (FeS). It is a new substance which has properties entirely different from Fe and S. Therefore, heating of mixture of iron and sulphur powder is a chemical change forming a compoundf
a gas is at 35.0°c and 3.50 l. what is the temperature at 7.00 l?
Answer:
363C
Explanation:
V = KT and T = V/K
3.5=k(35+273) = 308k
k=3.5/308 =0.011
new T=7.0/0.011=636K = 636-273 =363C
pleasssse help!
According to the ideal gas law, which will occupy a larger volume - 100 g of helium or 100 g of oxygen, if both are at the same temperature and pressure.
Answer:
Helium
Explanation:
The pressure of He gas would be greater than that of O2 gas
Plants are able to produce special chemicals at the right time and place.
A: True
B: False
help fast my test is almost due
Answer:
true
Explanation:
If 84.5 mol of an ideal gas occupies 21.5 L at 305 K, what is the pressure of the gas? pressure: atm
Answer:
98.367 atm
Explanation:
For this, you must use the equation PV=nRT. Since you are looking for P, rearrange the equation so that P= nRT/V.
Now collect the information you have:
n (mol) = 84.5
R (ideal gas constant to find atm not every case) = .08206
T (temperature) = 305 K (always convert to kelvin)
V (volume in liters) = 21.5
Now Use P= (85.5 mol)×(.08206)×(305 K)/(21.5) to get your answer in atm
weight is a flawed measure of mass because it.... PLEASE ANSWER BY 10/30/21 or a. s. a. p.
Answer:
I believe it's because it's based on gravity
Explanation:
mass is like your true weight while weight is your mass and some equation with gravity. it's been a few years
When baking soda and vinegar react bubbles are produced. What mostly occurred?
Answer:
a chemical reaction
Explanation:
Answer:
When vinegar comes in contact with baking soda, a cascade of two chemical reactions takes place. The result is carbon dioxide gas—a product of the reactions—bubbling up in a water solution. The bubbles create the fizz and sizzling sound.Baking soda is bicarbonate (NaHCO3) and vinegar is acetic acid (HCH3COO). One of the products this reaction creates is carbon dioxide, which makes the bubbles. When the baking soda meets the vinegar, there is a chemical reaction as carbon dioxide gas is created and fills the balloon causing it to inflate.
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