Answer:
Explanation:
Two sig digits means that 5239 becomes 52 with some zeros behind it. How many?
There were 2 numbers after the 2. So two sig digits would become 5200
If the third digit from the left is a 5 or more then the answer would be
5300.
que chest pain
These may be signs of a serious condition. See your doctor
Ask a doctor before use if you have:
had heartburn over 3 months. This may be a sign of a more serious condition.
sfregent wheezina, particularly with heartbum
unexplained weight loss
Bea or vomiting
stomach pain
Ask a doctor or pharmacist before use if you are taking a prescription drug Acid reducers
may utteract with certain prescription drugs.
Stop use and ask a doctor it:
your heartburn continues or worsens
you need to take this product for more than 14 days
you need to take more than 1 course of treatment every 4 months
w you got diarrhea
you develop a rash or joint pain
I pregnant or breast-teeding, ask a health professional before uso.
Koop out of reach of children. In case of overdose, get medical help or contact a Poison
Control Center night away (1-800-222-1222).
Answer:
.........................okay?
during the electrolysis of cryolite ,aluminium and fluorine are formed in.......molar ratio
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From the first mechanism, it can be seen that the Aluminum is reduced at cathode and Florine is oxidized at anode.The ratio of aluminium and fluorine is the ratio of their change in oxidation number, i.e. 2:3༒HOPE SO IT HELPS YOU༒
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What is the concentration in moles per litre of:
a a sodium carbonate solution containing 53 g of the salt
(Na2CO3) in 1 litre?
b a copper(ll) sulfate solution containing 62.5 g of the salt
(CuSO4.5H20) in 1 litre?
Answer:
the concentration in moles per litre of is
Explanation:
Molarity
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Substances that contain a transition metal can be oxidizing. The greater the number of oxidation of this metal, the greater the oxidizing character of the substance. In an industrial process in which the use of an oxidizing agent is necessary, only five substances are available: CaO, FeO, Cu₂O, Cr₂O₃ and KMnO₄.
The substance that should be used in this process, as it has a greater oxidizing character, is:
a) Cr₂O₃
b) Cu₂O
c) CaO
d) FeO
e) KMnO₄
_____ A molecule is the smallest part of
A an element
B a compound
C a substance
D an atom
Answer:
B.a molecule is the smallest part of a compound
Answer:
substance
Explanation:
Doing my summer school work right now. Please help me pass I don’t want to take chemistry for the third time.
Answer:
13.B 0.15 M KBr
14.C 1 M C²h⁵OH
15.D 0.1 M C⁶H¹²o⁶
16.A 2 K² SO⁴
17.A 2 M K² SO⁴
18.D 0.028 M KBr
19.A 1 M Nal
20.B 0.1 M AICI³
Which element would have the lowest electronegativity? (1 point)
O an element with a small number of valence electrons and a small atomic radius
O an element with a small number of valence electrons and a large atomic radius
an element with a large number of valence electrons and a large atomic radius
Dan element with a large number of valence electrons and a small atomic radius
The element that will have the lowest electronegativity is an element with a small number of valence electrons and a large atomic radius.
Electronegativity of an element is the ability or power of that element in a molecule to attract electrons to its Valence electrons. The following are the properties of electronegativity:
It increases across a period from left to right of the periodic table,It decreases down the periodic table groupsGroup 1 elements are the least (lowest) electronegative elements. These elements have the lowest valence electrons with a large atomic radius. Group 7 elements are the most electronegative elements.Atomic radius of elements increase down a group because of a progressive increase in the number of shells occupied by electrons which increases the size. But it decreases across a period because electrons are accommodated within the same shell leading to greater attraction by the protons in the nucleus.
Learn more about electronegativity of elements here:
https://brainly.com/question/20348681
Answer: Its B the guy above me is correct
What kind of reaction is 21,02 → 2H,0 + 0,2
A. Single replacement
B. Double-replacement
C. Decomposition
D. Synthesis
Answer:
I think B
Explanation:
Double - replacement
Again I am here with privious question
I have post this question last time also but no one answers. So can you solve this. I need it.
I will support your account
Answer:
The answer is below
Explanation:
1. Fractional Distillation
2. Simple Distillation
3. Filtration
4. Steam distillation or lemon grass oil extraction
1.Which of the following forms only Ionic Bond?
1)Ca 2)C 3)Si 4)P
2.How many atoms of Na are present in 92 a.m.u of it?
a)4 b)5 c)6 d)7
The Answer is A)4 atoms of NA are present in 92 a.m.u
If an atom has three shell and number of valence electrons are two. Is this element metal
or non-metal and why? Name the element and it’s valency.
Answer:
Metal
Element: Calcium
Valency: 2
Explanation:
To find the element, let's use the periodic table. (Look below)
We already went past 3 shells, just need the 2 electrons after it.
Just skip to the 4th row and count 2 to the right
We end up at Calcium.
Calcium is a metal and we're also on the alkaline earth metals column.
Calcium will need to lose 2 electrons to reach stability, so the valency is 2.
Classify the crystalline solids
full answer
crystalline solids are the type of solid which have long term arrangement of particle
they have sharp melting and boiling point
Answer:
OMG wow thankyou so so so much for the thanks ( ◜‿◝ )♡
how do i know if a salt is insouble or soluble?
[preparations of salts]
Answer:
by the expirement:
In which mix salt with water
Plz answer to this question
Answer:
A is solid
B is solid
C is liquid
D is a gas
The melting point is 15 degrees celcius
Its boiling point is 110 degree celcius
A,C and D are the portions showing the change in state
A characteristic is a feature that helps to identify something. How would you describe the characteristics of a good movie or book?
A characteristic for a movie or book could be how good or bad the plot/story is. You can even get more into detail for movies. Such as, "How was the acting? When the character was sad did you really feel their expressions?" Or so on like that haha. For books, it could be about it's pattern of writing or such, "alliterations, stressed patterens etc. Hope I helped lol.
Are eukaryotic, multicellular and heterotrophic
Can you tell me name of chemicals in sea Please?
this is my attachment answer hope it's helpful to you
Does the following statement describe a theory, law or both?
“Accepted as true by scientists”
A) BOTH THEORY AND LAW
B) LAW
C) THEORY
Statement describe both theory and law .
muddy water is an example of ______mixtures
Answer:
suspensions of heterogeneous mixtures from which some of particles settle with time.
Answer:
Muddy water is an example of homogeneous mixture.
what is the mass of 1 mole of chlorine ion
Answer:
35.453 g
Explanation:
one mole of chlorine is 34.453 g
Answer:
One mole of chlorine atoms has a mass of 35.453g. A mole of something means that you have 6.023×1023 units of that something. So if you have a mole of Cl atoms you have 6.023×10
Hope this helps <3
Need thanks? Comment /hearthelp
Question 5: thanks you
Answer:
A linear molecule has a bond angle of 180°
using chemical equations, show the different stages of fermentation
please I need help urgently!!!
Answer:
in the fermentati0n process glucose [C6H12O6]c of food is converted into ethanol [ethyl alchol, C2H5OH] and Co2 by yeast cell .In this process yeast cell produce in vertase and zymase enzyme which convert glucose into alcohol .
i.e. c6H12O6========> C2H5OH+Co2+energy
What is a weak acid?
A. An acid that does not have a conjugate base
B. An acid that does not dissolve completely
C. An acid that has been diluted with water
D. An acid that has a very low pH value
Answer:
B
Explanation:
strong acids ionize completely in water
Answer:
An acid that does not dissolve completely
Explanation:
What are easy ways to
Study Chemistry ??
Answer:
seneca
past papers
take notes from videos
Explanation:
very good website, asks questions about the subject correct for your exam board and gives correct answers and explanations
exam papers always help
To convert from one metric unit to another metric unit is done simply by moving the decimal place the appropriate amount of places.
Example: 2.5 cm = 25 mm
true or false?
Answer: true
Explanation:
2.5 cm does = 25mm
Answer:
True
Because, all of these metric units differ from one another by a multiple of 10.
c. What is Cytoplasm? What does it contain?
Answer:
Cytoplasm is the space between cell membrane and nuclear membrane filled with a translucent liquid . It contains carbohydrates , proteins , lipids , nucleic acids , sodium and pottassium salts , water and enzymes .
can anyone help me w this ?
Answer:
28g of He =7 mol0.5 mole of O2=16gmolecular mass of common salt =58.541.5 mole of Ca=60gDefine physical and chemical properties, provide three examples of each, discuss their reversibility, and explain the fundamental differences between them.
Answer:
Physical properties are defined as the properties which can be observed without changing its chemical composition.
For example: color, volume, and molecular weight.
Chemical properties are defined as the properties which can be observed only after changing chemical identity of the substance.
For example: reactivity, toxicity, and flammability.
The fundamental differences between physical and chemical properties are as follows:
Chemical properties are related to chemical bonds of the substance while physical properties are not.
In chemical properties, chemical identity of substance changes while physical properties do not have any change.
Chemical properties predict the reaction of substance while physical properties only describe the appearance of the substance.
Explanation:
Answer:
A measurable property that can be observed typically and explains any matter or organism's appearance and physical behavior is called a physical property. Examples of physical properties are appearance, boiling point, freezing point, melting point, colors, odor, mass, density, solubility. Properties that are only observed during a reaction or change in the composition of a matter is called a chemical property. These properties describe the internal part of anything and explain how it behaves when reacted with other chemical substances. Examples are enthalpy, entropy, reactivity, flammability, oxidation state, acidity, basicity. Some physical properties are reversible or sometimes irreversible. Like the change of states of matter is reversible, and the growth of an organism is irreversible. The same thing with the chemical properties. There are reversible chemical reactions(formation of ammonium chloride) and irreversible chemical reactions. (burning of a chemical substance). After knowing all about these properties, the most fundamental difference is that the physical properties can be measured without any chemical change in them. But a chemical property is measurable when the substance goes through a chemical reaction.
Explanation:
Convert 500.45 g to kg (do not use Scientific Notation)
Answer:
To convert grams to kilograms, you divide the number of grams you have by 1000. So, 800 g = 800/1000 = 0.8 kg.
Explanation:
Which statement is true?
A.
Molar concentration is proportional to the temperature of a reaction.
B
Molar concentration is proportional to the change in the number of moles in a reaction.
c.
Molar concentration is proportional to the partial pressure of a gaseous system.
D
Molar concentration is proportional to the volume of a system.
Answer:
I'm not really sure. but I think is D
Answer: B, Molar concentration is proportional to the change in the number of moles in a reaction
Explanation: took the test on plato
