Answer:
10.7
Explanation:
The addition of 7.6 + 2.401 + 0.68 = is 10.681.
According to the addition of sig figs, you want your answer to have the same amount of places, after the decimal point, as the least sig-fig figure.
7.6
2.401
0.68
+
----------
10.681 - Draw a line straight down from the least sig-fig figure (7.6)
So the maximum figure after the decimal point is one. Since 8 is greater than 5, you have to round up from 10.6 to 10.7.
PLEASE HELP ME WITH THIS I ONLY HAVE 8 MINUTES I will give you extra points . NUMBER 6
Answer:
3 mass instincts. If you look at the scale you can they evenly sometimes line up with a line. Whenever a huge instinct occurred the lines were really high, but whenever they were little instincts on the scale the lines would go down
Explanation:
Write the chemical formula for the ionic compound formed by lithium and fluorine.
Answer:
→ LiF
Explanation:
[tex]{ \rm{2Li _{(s)} + F _{2(g)} \dashrightarrow \: 2LiF _{(s)} }}[/tex]
Answer:
[tex]Lithium⟼Li+Fluorine⟼F=LiF[/tex]
37. A patient had pale tinger nail, shortness of breath and felt dizzy. The patient is most likely suffering from A. Kwashiorkor B. Marasmus C. Anaemia D. Rickets
Answer:
Anaemia
Explanation:
Symptoms: fatigue, skin pallor, shortness of breath, lightheadedness, dizziness, or a fast heartbeat.
15.3 Determine the mass of the following: 15.3.1. 2 mol calcium atoms
15.3.2. 0,3 mol nitrogen molecules
15.3.3. 0,5 mol table salt
15.3.4. 0,2 mol hydrochloric acid
15.3.5. 0,08 mol sodium carbonate (Na2CO3)
15.3.6. 0,25 mol ammonium sulphate (NH4)2SO4
Answer:
hh
Explanation:
hello there
looking for some help here,
Liquid A has a mass of 80 grams and a volume of 10 ml. What is liquid A's density?
1: 1.25 g/ml
2: 800 g/ml
3: 8 g/ml
4: 80 grams
The electronic structure 1s22s22p63523p64523d8 refers to the ground state of
Kr.
Ni.
Pd.
Fe.
none of the above.
Previous
The given electronic configuration 1s²2s²2p⁶3s²3p⁶4s²3d⁸ is the Nickel (Ni). Therefore, option (B) is correct.
What is an electronic configuration?The electron configuration can be explained as electrons being filled in different energy levels of an atom of a particular element. In the electron configuration, the number of electrons is usually written as a superscript of atomic subshells. For example, the electron configuration of Oxygen is written as 1s²2s²2p⁴.
The sequence of fully filled subshells that correspond to the electronic configuration of a noble gas is denoted by square brackets. The principal quantum number (n) can be used to evaluate the maximum number of electrons in an electron shell.
The value of 2n² is given the maximum number of electrons. The atomic orbitals at low energy must be filled first occupying an orbital with a higher energy level.
The total number of electrons filled in the given electronic configuration 1s²2s²2p⁶3s²3p⁶4s²3d⁸ is 28. The atomic number of Nickel is 28 therefore it is the configuration of Nickel.
Learn more about electronic configuration, here:
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2567 milliliters to liters
Answer:
2.567 litres
Explanation:
I dont have a proper explanation sorry
Find the sum of the
following:
89.001 + 0.0001 + 348.4 +
49166
Answer: 49,603.4011
Explanation:
Answer:
49603.4011
Explanation:
89.001
+. 0.0001
348.4
49166
answer: 49603.4011
#1. Boyle's Law. A gas with a volume of 4.0 L at a pressure of 205 kPa is allowed to expand to a volume of 12.0 L.
What is the pressure in the container if the temperature remains constant? (Answer is 6.8 kPa).
I NEED TO FIND HOW YOU GET TO THAT ANSWER
The final pressure in the container if the temperature remains constant is 68.3 kPa.
Given the following data;
Initial volume, V1 = 4.0 liters Initial pressure, P1 = 205 kPa Final volume, V2 = 12.0 LitersTo find the final pressure in the container if the temperature remains constant, we would use Boyle's Law:
Mathematically, Boyle's law is given by the formula;
[tex]P_1V_1 = P_2V_2[/tex]
Where;
P1 is the original (initial) pressure. P2 is the final pressure.V1 is the original (initial) volume. V2 is the final volume.Substituting the values into the formula, we have;
[tex]205[/tex] × [tex]4 =[/tex] [tex]12P_2[/tex]
[tex]820 = 12P_2\\\\P_2 = \frac{820}{12}[/tex]
Final pressure, P2 = 68.3 kPa
Therefore, the final pressure in the container if the temperature remains constant is 68.3 kPa.
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The mass of 2.50 moles of calcium fluoride (CaF2) is how many
grams.
Answer:
195.199 grams
Given R = 0.0821L⋅atm/mol⋅k, how many moles of gas are in a 1.25 L container at 300K and 2.07 atm?
A. 9.51 mol
B. 0.105 mol
C. 0.084 mol
D. 0.067 mol
Explanation:
Its B) 0.105 enjoy youre day
4
Select the correct answer.
Which statement best describes how chemical equations demonstrate conservation of mass?
O A.
The number of reactants is the same as the number of products.
O B.
The compounds are the same on each side of the reaction.
O c.
The number of atoms of each element is the same on each side of the equation.
OD.
The state of matter is the same on each side of the equation.
Answer:
C. The number of atoms of each element is the same on each side of the equation.
Explanation:
[tex].[/tex]
Question 1 of 5
A specific nitrogen atom has 7 protons and 6 neutrons. If this is a neutral
atom, how many electrons does the atom have?
A. 7
B. 13
C. 14
D. 6
SUBMI
Answer:
A.7
Explanation:
because proton equals to electron in neutral
which of the following oxides will react with magnesium most readily when both are heated?
A.zinc oxide
B. copper(2) oxide
C.lead (2) oxide
D. aluminum oxide
Answer:
None of the above
Explanation:
• This is because all the metal oxides provided are below magnesium in the reactivity series.
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Help me join the name the muddled sentences
Answer:
did this help ?
Explanation:
He muddled his way through the opening verse and belted out the chorus, creating a schizophrenic performance.: The results included muddled avant-garde theatrical staging techniques and insensitive and maladroit portraits of African Americans .
The variable that we change or test in an experiment is called the
A) Dependent variable
B) Independent variable
C) Constant
the variable that we change in an experiment is the Independent Variable. The dependent variable is the outcome and the constant is what remains the same throughout the experiment.
Why does the velocity of catalyzed reaction reach maximum at certain
concentration of enzyme?
Answer:
Because the total energy of the enzyme has been used up and actions already complete
Explanation:
Catalyst are substance known to speed up rate of chemical reaction just like taking a short pathway. When velocity of catalyzed reaction reach maximum, at that moment reaction has reach it full potential (there is an equilibrium in reaction). there won't be any changes on further addition, and mostly indicate that Reaction is Complete
An automatic response of the body that occurs very rapidly and with-out conscious control is called
Answer:
Reflex.
Explanation:
Because it can occur very rapidly and without conscious control.
calculate the boiling point elevation for solution of 25.0 grams of menthol in 130 grams of ethanol. Ethanol boiling point elevation constant is 1.22 oC/m
Answer:
Explanation:
When a solute is added to a solvent, the vapor pressure of the solvent (above the resulting solution) is less than the vapor pressure above the pure solvent. The boiling point of a solution, then, will be greater than the boiling point of the pure solvent because the solution (which has a lower vapor pressure) will need to be heated to a higher temperature in order for the vapor pressure to become equal to the external pressure (i.e., the boiling point).
The boiling point of the solvent above a solution changes as the concentration of the solute in the solution changes (but it does not depend on the identity of either the solvent or the solute(s) particles (kind, size or charge) in the solution).
I cant give you the answer but I hope this helps.
Reya is a neuroscientist who studies behaviors in mice. She is working on a project in which the mice are given a snack when they push a small button on the wall of their enclosure. At first, the mice don't understand
the connection between thebutton and the snack. In time, they leam to push the button whenever they want a snack. Reya's experiment an example of what type of conditioning?
A. operant
B. classical
C. magical
D. phantom
Answer:
It should be operant.
Explanation:
The mouse is associating a voluntary behavior in order to recieve the outcome, which is the snack.
What is the quantum mechanical electron configuration of arsenic?
Answer:
After the 4s sublevel is filled with two electrons, ten electrons fill the 3d sublevel, which is slightly higher in energy than the 4s sublevel. After the 3d sublevel is filled, the remaining three electrons will be in orbitals in the 4p sublevel. Thus, the electron configuration for arsenic is [Ar] 4s(2 squared) 3d(10 squared) 4p(3 squared).
What happens if an atom has a different amount of electrons than protons? (Select all that apply) A: The particle is no longer an atom. B: The particle becomes a different element. C: The particle has a charge. D: The particle is considered an ion.
What will happen in a case there is different number of electrons compare to protons is D: The particle is considered an ion.
An ion can be regarded as atom or molecule which posses some amount of electron more than amount of protons and vice versa. It can be regarded as molecules that has a charge. i.e ( -ve or +ve)When the number of electron in this molecules or atom is more that that of the present protons, then the ion is negatively charged ion.When a particles posses less electron compare to the present protons then the ion is positively charged.
Therefore, an ion can be charged positively and it can be charged negatively
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Caltrain tablets contains calcium carbonate. If one tablet requires 34.46 mL of 0.291 M solution of hydrochloric acid for neutralization, how many milligrams of calcium carbonate is in this caltrate tablet?
There are 500 mg of calcium carbonate is in this caltrate tablet
The equation of the reaction is;
2HCl(aq) + CaCO3(aq) ------> CaCl2(aq) + CO2(g) + H2O(l)
Next, we have to obtain the amount HCl reacted as follows;
Number of moles = concentration × volume
Volume = 34.46 mL or 0.03446 L
Concentration = 0.291 M
Number of moles = 0.291 M × 0.03446 L
Number of moles = 0.01 moles
Since the reaction of HCl and CaCO3 are in the ratio of 2:1
2 moles of HCl reacts with 1 mole of CaCO3
0.01 moles of HCl reacts with 0.01 moles × 1 mole/2 moles
= 0.005 moles of CaCO3
Mass of CaCO3 = number of moles × molar mass
Mass of CaCO3 = 0.005 moles of CaCO3 × 100 g/mol
Mass of CaCO3 = 0.5 g or 500 mg
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Calculate the number of grams of Carbon in Co2?
Answer:
Please click above answer.
Determine the number of moles in 3.50 x 1023
formula units of BaCl2
Answer:
0.58 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
From the question we have
[tex]n = \frac{3.5 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{3.5}{6.02} \\ = 0.581395[/tex]
We have the final answer as
0.58 molesHope this helps you
what is a compound substance
Answer:
A compound is a substance that contains atoms of two or more different elements.
Explanation:
Please mark my answer no. 1
When floating a ping-pong ball with a hairdryer, which two forces are balanced?
Answer:
The ping-pong ball will fly up with the air from the hair dryer until it reaches a point of balance – this is where the force of gravity (which pushes the ping-pong ball down) is equal to the force of the air (which is pushing the ping-pong ball up) hop it helps:)
help MEEEEE!!!!!!!!!!!
Answer:
Equation
Mark as brainlist
Answer:
equation
Explanation:
chemical changes can be shown in an equation/reaction because you can see products and reactants.
Please give me brainliest
Gaseous butano (CH,(CH),CH) will react with gaseous oxygen (0) to produce gaseous carbon dioxide (CO2) and goseous woter (11,0). suppose
20.9 g of butane is mixed with 54, 9 of oxypen. Calculate the minimum mass of butone that could be left over by the chemical reaction. Be sure your answer
has the correct number of significant digits.
Answer:
Firstly, We have to convert it in the Miles formula...
No. of moles = Mass given/Molar Mass
So, the final answer be come
Ans - 50.8 gm and there same % is 50.8% butane in reactionLook at diagram 1 above. What type of eclipse is shown based on the alignment of the Earth, Sun, and Moon?
Solar eclipse
Lunar eclipse