Answer:
bobo ang brainly
Explanation:
kasi hindi nya binibigay a ng tamang question
A ______ in medicine is a form of scientific argumentation in which evidence is used to rule out claims and support the best conclusion.
fill in the blank
Answer: Scientific reasoning
Explanation:
A scientific reasoning can be defined as the justification which connects the evidence with that of the claim and it rules out all those claims that are not supported by any evidence. It explains the fact that how evidence can support a claim and scientifically acceptable conclusion can be drawn. An argument is always based on one or more claims which can either be true or evidentially proved.
An apple appears red when struck by white light. This appearance is because the red light is reflected and the other colors are absorb. What color will this apple appear to be when struck by blue yet.
A. black
B. blue
C. red
D. white
O nióbio é um metal encontrado em jazidas naturais, principalmente na firma de óxidos. Em uma jazida que contenha nióbio com número de oxidação +5, a formula do óxido predominante desse metal corresponde a:
Answer:
what
Explanation:
What are the different types of excretion?
Answer:
There are 4 excretory organs in human: The skin, the lungs, the liver, and the kidney (Urinary system). The skin excretes the sweat outside the body through numerous pores in the surface of this organ. Sweat is a mixture of three metabolic wastes: water, salts, and urea.
Which component is reduced during the electrolysis of brine?
A. sodium ions
B. chloride ions
C. water
D. sodium hydroxide
Answer:
During the electrolysis, hydrogen and chloride ions are removed from solution whereas sodium and hydroxide ions are left behind in solution. This means that sodium hydroxide is also formed during the electrolysis of sodium chloride solution.
Answer:
water....
Explanation:
gradpoint
How many atoms are in 1.204x10^22 moles of arsenic?
Answer:
0.02 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
We have
[tex]n = \frac{1.204 \times {10}^{22} }{6.02 \times {10}^{23} } \\ = 0.02[/tex]
We have the final answer as
0.02 molesHope this helps you
.
Determine the temperature of .084 moles of CO2 gas at 790 mmHg
which occupies a volume of 2.1L
Answer:
Explanation:
Molar volume at STP = 22.4L
So 0.084 mole of CO2 at STP has volume of 22.4*0.084 = 1.882L
Combined Gas Law: P1V1/T1 = P2V2/T2
760*1.882/273 = 790*2.1/Temperature
Temperature = 790*2.1*273/760/1.882
= 316.6K
Determine the mass of MgCl2 needed to create a 100. ml solution with a concentration of 3.00 M.
Explanation:
[tex]1000ml \: contain \: 3 \: moles \\ 100 \: ml \: will \: contain \: ( \frac{100 \times 3}{1000} ) \: moles \\ = 0.3 \: moles \\ RFM = 95 \\ 1 \: mole \: weighs \: 95 \: g \\ 0.3 \: moles \: weigh \: ( \frac{(0.3 \times 95)}{1} \: g \\ = 28.5 \: g \: of \: magnesium \: chloride[/tex]
Which wave has the highest frequency?
1
2
3
4
no link or i will report
Answer:
4
Explanation:
because number 4 moves continuous
If you were to add salt to water , what temperature would you expect it to boil? Assume you’re at sea level
100 c
More than 100 c
Less than 100 c
Answer:
100c
Explanation:
Use the following periodic table to identify the letter(s) that match each of the statements below.
(Each element may be used once, more than once or not at all)
Answer:
l and t
Explanation:
because they are in group one
Answer:
L & T
since are found in the same group.
you had a 5 gram sample , how much of the original substance would remain after 1 half- life?
what is the half life though?
zA 25.0 mL sample of an acetic acid solution is titrated with a 0.175 M NaOH solution. The equivalence point is reached when 12.5 mL of the base is added. The concentration of acetic acid in the sample was ________ M. A 25.0 mL sample of an acetic acid solution is titrated with a 0.175 M NaOH solution. The equivalence point is reached when 12.5 mL of the base is added. The concentration of acetic acid in the sample was ________ M. 0.365 0.119 0.0875 0.175 none of the above
Answer:
0.0875M of Acetic Acid
Explanation:
Based on the reaction of acetic acid (HX) with sodium hydroxide (NaOH):
HX + NaOH → NaX + H₂O
1 mole of acetic acid reacts with 1 mole of NaOH
That means the moles of sodium hydroxide added = Moles the acetic acid at the equivalence point.
To solve this question we have to find the moles of NaOH = Moles HX. With the moles and the volume (25.0mL = 0.0250L) we can find the molarity of the acetic acid:
Moles NaOH = Moles Acetic acid:
12.5mL = 0.0125L * (0.175mol / L) = 0.00219 moles Acetic Acid
Molarity acetic acid:
0.00219 moles Acetic Acid / 0.0250L =
0.0875M of Acetic AcidThis refers to the most powerful means of communicating confidence and conviction A.Posture B.eye contact C.body movement
please
please
please
please
ples
please
please
please help me
Answer:
c
Explanation:
the way you move explains how confident you are
Structure of co2..................................
Answer:
Carbon dioxide (chemical formula CO 2) is an acidic colourless gas with a density about 53% higher than that of dry air. Carbon dioxide molecules consist of a carbon atom covalently double bonded to two oxygen atoms.
In CO2, the Carbon atom is in the central position as it is the least electronegative atom in the molecule. Two Oxygen atoms are located on the terminals where both these atoms share electrons and form bonds with the central Carbon atom.
Lewis structure of CO2 given in the attached image:
if irons temp goes from 50c to 75c in a 20g sample how many joules of heat were used
Answer:
224.5J
Explanation:
Using the formula as follows:
Q = m × c × ∆T
Where;
Q = amount of heat (J)
m = mass of substance (g)
c = specific heat capacity.
∆T = change in temperature (°C)
According to this question;
m = 20g
∆T = 75°C - 50°C = 25°C
Q = ?
c of iron = 0.449 J/g°C
Using Q = m × c × ∆T
Q = 20 × 0.449 × 25
Q = 224.5J
How much 0.05 M HCl solution can be made by diluting 2L of 10 M HCl?
Answer:
400 L
Explanation:
As this problem deals with a dilution process, we can use the following formula:
C₁V₁=C₂V₂Where subscript 1 stands for the concentrated concentration and volume, while 2 stands for the diluted values. Meaning that in this case:
C₁ = 10 MV₁ = 2 LC₂ = 0.05 MV₂ = ?We input the data:
10 M * 2 L = 0.05 M * V₂And solve for V₂:
V₂ = 400 LThe intermolecular forces present between two molecules ofCH3-CH2-CH2-CH2-CH2-O-H are ________.
Answer:
Hydrogen Bonding!
This is because of two reasons:
1. Hydrogen is attatched to a very electronegative atom.
2. The electronegative atom it is attatched to has a lone pair.
Hope this helps!
I would really appreciate if you mark me brainliest as I have been trying to get there for a veryyy long time now :)
2 Na + Cl ---> 2NaCl
how many grams of NaCl can be produced if 33 grams of Na reacts with excess Cl2 and STP?
a. 170 g
b. 120 g
c. 84 g
d. 72 g
If 65 grams is ACTUALLY produced, what is the percent yield of NaCl in the above problem?
a. 54.2%
b. 38.2%
c. 77.4%
d. 90.3%
Answer:
1. d. 84g
2. c. 77.4%
Explanation:
1. Based on the reaction 2 moles of Na produce 2 moles of NaCl.
The moles of Na (22.99g/mol) in 33g are:
33g * (1mol / 22.99g) = 1.435 moles Na = 1.435 moles NaCl must be produced.
The mass of NaCl is (Molar mass: 58.44g/mol):
1.435moles * (58.44g / mol) = 84g
d. 84g
2. Percent yield is defined as 100 times the ratio between actual yield (65g) and theoretical yield (84g). The percent yield is:
65g / 84g * 100 =
c. 77.4%
bicarbonato es metal o no?
Answer:
La palabra bicarbonato es un término químico para referirse a una sal ácida del ácido carbónico en combinación con un metal. ... Pero si sólo está sustituido un átomo de hidrógeno por el metal, entonces obtenemos un bicarbonato o carbonato ácido, por ejemplo, bicarbonato sódico: CO3H Na.
I'm like a highway system in your body. I carry necessary supplies to the parts of your body that need llen, allu
carry away wastes so your body can get rid of them. I contain blood vessels and am a system with a lot of heart.
What system am I?
1:digestive system
2:circulatory system
3: muscular system
4:skeletal system
plssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss sssssssssssssssssss sssssssssssssssssss sssssssssssssssssss sssssssssssssssssss answer this correctly
Answer:
The circulatory system
Explanation:
Hope this helps
In the chemical laboratory, why do scientists use a mortar and pestle?
A. To increase surface area of a solute
B. To decrease surface area of a solute
C. To increase temperature of a solute
D. To decrease temperature of a solute
Answer:
A. To increase surface area of a solute
Explanation:
Explain why crystallisation can't be used to prepare calcium carbonate.
Explanation:
The mechanisms by which amorphous intermediates transform into crystalline materials are poorly understood. Currently, attracting enormous interest is the crystallization of amorphous calcium carbonate, a key intermediary in synthetic, biological, and environmental systems. Here we attempt to unify many contrasting and contradictory studies by investigating this process in detail. We show that amorphous calcium carbonate can dehydrate before crystallizing, both in solution and in air, while thermal analyses and solid-state nuclear magnetic resonance measurements reveal that its water is present in distinct environments. Loss of the final water fraction—comprising less than 15% of the total—then triggers crystallization. The high activation energy of this step suggests that it occurs by partial dissolution/recrystallization, mediated by surface water, and the majority of the particle then crystallizes by a solid-state transformation. Such mechanisms are likely to be widespread in solid-state reactions and their characterization will facilitate greater control over these processes.
Can someone give me an example of a synthesis reaction that is NOT a redox reaction? Pls don't send links. Thanks
Well an example is how hydrogen and oxygen react to form water, you could use that. We know that when two nonmetals react more than one product is possible. Sulfur and oxygen react to form sulfur dioxide or sulfur trioxide.
Hope this helps.
how long ago did the Atlantic Ocean separate Canada from Ireland....plz answer I have no idea lol
Answer:
Around 150 million years ago
Explanation:
The Atlantic ocean was formed during the Jurassic period
Answer:
200 millon years ago
Explanation: please give me brainliest
Describe at least 3 phases of thr water cycle and make sure to explain The state of matter of water at each of the phases
need help on dis plz that would be big help
Identify the base in this acid-base reaction: 2 upper H upper C subscript 2 upper H subscript 3 upper O subscript 2 plus upper M g (upper O upper H) subscript 2 right arrow upper M g (upper C subscript 2 upper H subscript 3 upper O subscript 2) subscript 2 plus 2 upper H subscript 2 upper O. HC2H3O2 Mg(OH)2 Mg(C2H3O2)2 H2O
Answer:
Mg(OH)2
Explanation:
Magnesium hydroxide is the base since it has hydroxyl ions.
Mg(OH)₂ is the base in this acid-base reaction.
What is a Base?This can be defined as a chemical substance which donates electrons, accepts protons, or releases hydroxide (OH-) ions in aqueous solution.
Mg(OH)₂ has the presence of hydroxide (OH-) ions in its compound which was why it was chosen as the most appropriate choice.
Read more about Base here https://brainly.com/question/9836972
For the reaction CH3COOH→CH3COO– + H+, which statement is true?
CH3COOH is a Brønsted-Lowry base.
CH3COO– is an Arrhenius base.
CH3COOH is a Brønsted-Lowry acid.
CH3COO– is a Lewis base.
Answer:
For the reaction CH3COOH→CH3COO– + H+
Among the given statements which is the correct statement?
CH3COOH is a Brønsted-Lowry base.
CH3COO– is an Arrhenius base.
CH3COOH is a Brønsted-Lowry acid.
CH3COO– is a Lewis base.
Explanation:
Bronsted acid is the proton donor.
Bronsted base is the proton acceptor.
Arrhenius base is the one that releases OH- ions when dissolved in water.
Lewis base is the one that is an electron-pair donor.
In the given reaction,
CH3COOH→CH3COO– + H+
Acetic acid releases a proton.
So, it is a proton donor.
Hence, It is a Bronsted-Lowry acid.
Third option is the correct answer.
You have three solutions of aqueous Sodium hydroxide. Their concentrations are 0.5M, 1.0M, and 1.5M. Which solution has the weakest concentration?
Answer:
0.5 M has the weakest concentration.
Explanation:
Hello there!
In this case, according to the given information, it turns out possible for us to remember that the concentration, or molarity, of a solution is given in terms of moles per liters of solution.
In such a way, we can infer that the solution with the weakest concentration is the one with the smallest molarity, that is 0.5 M.
Best regards!
Please help me with science
Answer:
The correct answer is A, Humid Subtropical
Explanation:
Humid Subtropical's climate is wet, warm, and located on the edges of tropics.