Answer:
a)11.552
b)8.722
c)29.915
d)8
e)5.4082
f)1.782
g)2.864
h)2.822
i)2.42
j)113
The correct number of significant figures are a.5 b.4 c.5 d.1 e.5 f.4 g.4 h.5 i.3 j.3 for all the calculations.
what are significant figures?Significant figures or digits are the minimum numbers from zero to nine which are used for the report of results that are uncertain and decimal is not a significant figue and starting zeros too.
the total number of significant figures are,
a) 3.42 + 8.132 =11.732 = 5 significant figures.
b) 4.9 + 3.822 = 8.722 = 4 significant figures.
c) 17.8 + 12.115 = 29.915 = 5 significant figures.
d) 4.55 + 3.45 = 8 = 1 significant figures.
e) 1.966 + 3.4422 = 5.4082 = 5 significant figures.
f) 3.882 – 2.1 = 1.722 = 4 significant figures.
g) 4.894 - 2.03 = 2.866 = 4 significant figures.
h) 15.6600 - 12.838 = 2.8262 = 5 significant figures.
i) 11.22 - 8.8 = 2.42 = 3 significant figures.
j)133-20 = 113 = 3 significant figures
Therefore, The correct number of significant figures are a.5 b.4 c.5 d.1 e.5 f.4 g.4 h.5 i.3 j.3 for all the calculations.
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What is the Albedo of Earth?
Group of answer choices
The energy that is absorbed into Earth.
The energy that is reflected back into space from Earth.
Just a cool word.
Minion talk for energy.
SCIENCE
6TH GRADE
BRAINLIEST!!
Answer: Earth's average albedo is about 0.3. In other words, about 30 percent of incoming solar radiation is reflected back into space and 70 percent is absorbed. A sensor aboard NASA's Terra satellite is now collecting detailed measurements of how much sunlight the earth's surface reflects back up into the atmosphere.
Explanation: ik im annoying thanks
It is made up of two or more compounds is it mixture
or compound?
Answer:
mixture
Explanation:
convert 250cm³ to m³
Answer:
0.00025 m3
Explanation:
it just is; used conversion table
the term “ The Universe “refers to ?
Answer:
everything including the space...
hope it helps...
Which of these outdoor activities would you most likely participate in during the winter?
A.
hacer una barbacoa
B.
organizar un picnic
C.
nadar en la piscina
D.
ir a esquiar
Answer:
D.
Explanation:
Translation:
A. make a barbecue
B. organize a picnic
C. swimming in the pool
D. to go skiing
Barbecue is usually a summer activity, so we eliminate that.
It would be too cold for a picnic!
It would be too cold to go swimming, and that's more of a summer thing!
Skiing is a snow activity, and since it is winter, it is likely to know.
write the electronic configuration of oxygen on the basis of sub shell.
Answer:
[He] 2s² 2p⁴
Explanation:
If you're looking for the answer in subshell form, here it is:
[tex]1sx^{2} 2sx^{2} px^{4} (2.6)[/tex]
Quote:
"Where I walk, I walk alone. Where I fight, I fight alone."
- Akuma
Write the chemical formula for Calcium Dichromate
Ca Cr2O7^2 -
2 2
2 2
1 1
=CaCr2O7^2 -
Is this right? Or does the second part have a bracket
Answer:
Its right
Explanation:
The chemical formula of calcium dichromate is CaCr207
Fill in the blank. The amount which an object accelerates
depends on the mass of the object and on the size of the
acting upon it.
gravity
velocity
inertia
force
Answer: the answer is force
Explanation:
how many carbon atoms are in C6H14N4O2
a.4
b.2
c.6
d.14
Answer:
6
Explanation:
Answer:
6
Explanation:
C6
Carbon 6
What is the definition Of prokaryote and give me a sentence that explain its so definition Adn the sentence
Answer:
Explanation:
Definition of Prokaryote. a single-celled organism (such as bacteria) that lacks a nucleus and cannot be seen with the naked eye. Examples of Prokaryote in a sentence. 1. The scientist studied the prokaryote under the microscope to see if its single-cell would multiply in certain conditions.
Hope this helps!
Prokaryotes are a single celled organism that is microscopic. They do not have a distinct nucleus with a membrane. They don't have other specialized organelles either. They also include bacteria and archaea.
"Prokaryotes are so small you cant see them with the bare human eye!"
[tex]\boxed{I\;hope\;it\;helps!}[/tex]
<3
When a trumpet was played, a nearby sheet of paper began to move.
What caused the paper to move? *
Answer:
Air from the trumpet moved it
Explanation:
HURRY ⚠️
How many Chlorine atoms in 2HCI?
Hiw many Hydrogen atoms are in 2HCl?
Answer:
2 in each
Explanation:
5. Complete and balance an equation for each reaction:
CaI₂ + Hg(NO₃)₂ ---------> (HgI₂ precipitates)
Al + Cl₂ --------->
Ag + HCl ------->
C₂H₂ + O₂ ------->
MgCl₂ --------->
CaI₂ + Hg(NO₃)₂ --------->HgI₂ + Ca(NO3)2
2Al + 3Cl₂ --------->2AlCl3
Ag + HCl ------->AgCl + H2
C2H2 + 5O2 --------> 4CO2 + 2H2O
MgCl₂ --------->Mg + Cl2
is the amount of
matter in an object.
Group of answer
choices
Weight
Volume
Density
Dough
How does the disorder of a gas compare to that of a
liquid or solid?
Answer:The atoms in gases are far apart from each other, so they are much more disordered than either liquids or solids.
Explanation:
Which option is an example of a physical property?
A. conductivity
B. pH
C. reactivity
D. rusting ability
physical property is conductivity
Which of the following is a correctly written chemical equation that demonstrates the conservation of mass?
O A. H2 + O2 + H2O
B. Mg + HCl + H2 + MgCl2
C. KC 103 → KC1 + O2
OD. H2O + CO2 + H2CO3
Answer:
Option D is correct.
H₂O + CO₂ → H₂CO₃
Explanation:
First of all we will get to know what law of conservation of mass states.
According to this law, mass can neither be created nor destroyed in a chemical equation.
This law was given by French chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
Example:
6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂
there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass.
Now we will apply this law to given chemical equations:
A) H₂ + O₂ → H₂O
There are two hydrogen and two oxygen atoms present on left side while on right side only one oxygen and two hydrogen atoms are present so mass in not conserved. This equation not follow the law of conservation of mass.
B) Mg + HCl → H₂ + MgCl₂
In this equation one Mg, one H and one Cl atoms are present on left side while on right side two hydrogen, one Mg and two chlorine atoms are present. This equation also not follow the law of conservation of mass.
C) KClO₃ → KCl + O₂
There are one K, one Cl and three O atoms are present on left side of chemical equation while on right side one K one Cl and two oxygen atoms are present. This equation also not following the law of conservation of mass.
D) H₂O + CO₂ → H₂CO₃
There are two hydrogen, one carbon and three oxygen atoms are present on both side of equation thus, mass remain conserved. Thus is correct option.
The chemical reaction that follows the conservation of mass has been the formation of hydrogen carbonate. Thus, option D is correct.
The conservation of mass states that the mass of the reactant and products has been equal. The mass can be calculated in terms of the number of atoms.
(A) [tex]\rm H_2\;+\;O_2\;\rightarrow\;H_2O[/tex]
The number of atoms of Hydrogen:
Reactant = 2
Product = 2
The number of atoms of Oxygen:
Reactant = 2
Product = 1
The number of atoms of products and reactant is not equal, Thus, the reaction did not follow the conservation of mass.
(B) [tex]\rm Mg\;+\;HCl\;\rightarrow\;H_2\;+\;MgCl_2[/tex]
The number of atoms of Mg:
Reactant = 1
Product = 1
The number of atoms of H:
Reactant = 1
Product = 2
The number of atoms of Cl:
Reactant = 1
Product = 2
The number of atoms of products and reactant is not equal, Thus, the reaction did not follow the conservation of mass.
(C) [tex]\rm KClO_3\;\rightarrow\;KCl\;+\;O_2[/tex]
The number of atoms of K:
Reactant = 1
Product = 1
The number of atoms of Cl:
Reactant = 1
Product = 1
The number of atoms of O:
Reactant = 3
Product = 2
The number of atoms of products and reactant is not equal, Thus, the reaction did not follow the conservation of mass.
(D) [tex]\rm H_2O\;+\;CO_2\;\rightarrow\;H_2CO_3[/tex]
The number of atoms of H:
Reactant = 2
Product = 2
The number of atoms of O:
Reactant = 3
Product = 3
The number of atoms of C:
Reactant = 1
Product = 1
The number of atoms of products and reactant is equal, Thus, the reaction follows the conservation of mass.
The chemical reaction that follows the conservation of mass has been the formation of hydrogen carbonate. Thus, option D is correct.
For more information about the chemical reaction, refer to the link:
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Please Heeelp!!
Predict the reactants of this chemical reaction. That is, fill in the left side of the chemical equation. Be sure the equation you submit is balanced. (You can edit both sides of the equation to balance it, if you need to.)
Note: you are writing the molecular, and not the net ionic equation.
___---> Ca(ClO)2 (aq) + H2O
2 HClO(aq) + Ca(OH)2(aq) = 2 H2O(l) + Ca(ClO)2(aq) is the balanced equation
I NEED HELP ASAP PLEASE TO WILL GIVE YOU A BRAINLEST
Answer:
Gravity
Explanation:
According to Newton's Law of Gravity, an object with mass will attract another object with mass.
Put the substance in a 25 mL beaker.
Click the beaker to get a closer look.
Now, observe and record the following:
- state of matter:
- appearance and texture:
- crystalline structure:
Answer:
1.) Liquid
2.) Powder
3.) No ( Not A Solid)
Explanation:
When substance put in a 25 mL beaker. than state of matter will be solid , appearance and texture will be powdered and crystalline structure will be powdered.
What is state of matter?A state of matter was one of many different shapes that matter can take. In daily life, four states of matter were visible: solid, liquid, gas, but also plasma.
What is crystalline structure?
The organized configuration of atoms, ions, and even molecules in such a crystalline material is usually referred to as crystalline structure.
Therefore,
state of matter = solidappearance and texture = powderedcrystalline structure = not solidTo know more about state of matter.
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No, since the slopes are different.
Yes, since the slopes are the same and the y-intercepts are the same.
Yes, since the slopes are the same and the y-intercepts are different.
No, since the y-intercepts are different.
Option C, slopes are same but y intercepts are different is the correct answer
5. What is the volume of a sample of metal with a mass of 220 grams and a density of 11 grams per
cubic centimeter?
(1 Point)
a:2420 cubic centimeters
b:231 cubic centimeters
c:20 cubic centimeters
d:0.25 cubic centimeters
pls answer fast
Answer:
The answer is option CExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\ [/tex]
So we have
[tex]volume = \frac{220}{11} \\ [/tex]
We have the final answer as
20 cm³Hope this helps you
In the compound nickel(II) sulfide, there is always 58.7 g of nickel for every 32.1 g of sulfur. What is the simplified ratio of
nickel to sulfur?
answer: 1.83 to 1
or at least that’s what i got
Use this formula: Q=(m)(∆T)(Csp), where Q is heat (what you’re solving for), m is mass in grams (g), ∆T is the change in temperature (ending temp. minus beginning temp.) in degrees Celsius (∘C), and Csp is the specific heat capacity in joules per gram per degree(J/g ∘C). The answer will be in joules of energy (J).
Just multiply all three quantities given in the text together (as it shows in the formula!) to get Q. But remember, you have to figure out the change in temperature (like 10 ∘C to 50 ∘C is a change of 40 ∘C).
1. A calorimeter holds 75 g water at 26°C. A sample of hot copper is added to the water. The final temperature of the water and copper is 39°C. What is the change in enthalpy associated with the change in the water’s temperature? The specific heat capacity of water is 4.19 J/g°C.
2. A chemist heats a 215-g sample of iron from 25.0°C to 90.0°C. How much heat did the iron absorb? The specific heat capacity of iron is 0.45 J/g°C.
1. Q = 4085.25 J
2. Q = 6288.75 J
Further explanationHeat can be calculated using the formula:
Q = mc∆T
A calorimeter is a device used to measure the specific heat of material
1. mass of water : m= 75 g
T1 = 26°C
T2 = 39°C
Csp = 4.19 J/g°C.
[tex]\tt Q=m.c.\Delta T\\\\Q=75\times 4.19\times (39-26)\\\\Q=4085.25~J[/tex]
2.mass of iron = 215 g
T1 = 25°C
T2 = 90°C
Csp = 0.45 J/g°C.
[tex]\tt Q=m.c.\Delta T\\\\Q=215\times 0.45\times (90-25)\\\\Q=6288.75~J[/tex]
What are the particles that are found in the nucleus of an atom
Answer:
Protons and Neutrons
Explanation:
Please help it’s due today, I will give brainliest
the two middle ones is the answer
Why would heating up the human body be a bad choice for causing a chemical reaction?
Answer:
Explained below
Explanation:
The human body has a normal core temperature of around 37°C to 38°C.
Now, if it is heated up to say 39° to 40°C, fatigue will start to set in and the brain begins to tell the muscles to slow down.
If it's now heated to higher temperatures above above 41°C, the body will begin to experience heat exhaustion and therefore will start to shut down.
Due to this process, the body can't even sweat at that stage because blood flow to the skin will stops thereby making the body feel cold and clammy. Thus, chemical processes/reaction in the body will begin to be affected and the cells inside the body will start to deteriorate and thus there is now a huge risk of having multiple organ failure.
May I have some salt? (What is salt consisted of?)
Answer: Salt is primarily composed of sodium chloride.
Explanation:
Boron
B
10.811
Number of neutrons
Answer:
6
Explanation:
To determine the number of neutrons we round 10.8 to 11 and subtract the atomic number (5) and get 6; therefore, boron has 6 neutrons.
Fog is composed of water droplets in air. Which term describes fog? A. solution B. colloid C. suspention D. solvent
Answer:
colloid
Explanation:
Colloid is a type of fog
Answer:
colloid
Explanation:
I got it right on egd