Answer:
Calcium cyanamide
Explanation:
I think it has to be calcium cyanide, because of the cyanamide ion (CN).
How many centimeters are in 1 inch?
The metric system is used to measure the objects based on various parameters. A centimeter is a unit of length. One inch is equivalent to 2.54 cms.
What is the metric system?The Metric system is the system used to estimate the weight (mass), length, and capacity of the object and was first introduced in France by Gabriel Mouton, a mathematician, and an astronomer. The metric system measures length, mass, volume, time, etc.
The metric system of length use the SI unit of meter, other units used to measure the length are centimeter, kilometer, millimeter, inches, yard, mile, feet, etc.
Given,
Length = 1 inch
It is known that an inch is equivalent to 2.54 centimeters, hence, 1 cm = 2.54 cms.
Therefore, there are 2.54 centimeters in one inch of the object.
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A fluoride ion (F) has the same electron configuration as
A. Na+
B.Na
C.Cl-
D.Cl
Answer:
Option A. Na⁺
Explanation:
Floride ion (F¯) simply indicates that the fluorine atom has gain an extra electron.
Thus, the electronic configuration of the fluoride ion (F¯) can be written as follow:
F¯ (10) => 1s² 2s²2p⁶
Next, we shall determine the electronic configuration of the element given in options to see which is the same as that of the fluoride ion (F¯). This is illustrated below:
Na⁺ (10) => 1s² 2s²2p⁶
Na (11) => 1s² 2s²2p⁶ 3s¹
Cl (17) => 1s² 2s²2p⁶ 3s²3p⁵
Cl¯ (18) => 1s² 2s²2p⁶ 3s²3p⁶
From the above illustrations, we can see that the fluoride ion (F¯) has the same electronic configuration as Na⁺.
Each element is made up of electrons and these electrons are filled in different shells. These are the following shells in the electrons:
K shellL shellM shellN shellAccording to the question, the fluoride ion has 10 electrons in its 2 shells, that is 2 in K shell and 8 in L shell.
A similar number of shell and electrons to the fluoride ion is sodium ion ([tex]Na^{+}[/tex])
The [tex]Na^+[/tex]has a total 10 number of electrons, hence the electronic configuration is 2 and 8.
Therefore, the [tex]Na^+[/tex] is the correct option.
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Please help.. This is not a test.. It’s a Naked egg experiment.. please help
Answer:
Is there a question you need help with?
which element is most likely to have an oxidation number of -2?
A. F
B. NE
C. CA
D. O
Answer:
D. O
_________________________________
F ----------¢ - 1
Ne --------¢ 0
Ca --------¢ + 2
Answer:
D. O
Explanation:
A rock is an (blank) of minerals.
I don't get this at all.
Please mark as Brainiest. I would be so happy!!!
Answer:
Minerals - composed of orderly arrangements of atoms. Rocks - are composed of minerals. Crystals - solid materials that have an orderly arrangement of atoms. Gems - are rare and beautiful minerals that often are cut from crystals.
23. A 54-gram sample of an unknown material has a volume equal to 20 cm'. Based on its density,
could the sample be aluminum? Explain.
Answer:
The given sample is aluminum.
Explanation:
Given data:
Mass of unknown sample = 54 g
Volume of given sample = 20cm³
Is sample is Al = ?
Solution:
In order to solve this problem we must know the density of Al from literature.
density of Al = 2.7 g/cm³
Now we will calculate the density of given unknown sample.
d = m/v
d = 54 g/ 20cm³
d = 2.7 g/cm³
Thus given sample is aluminum.
How many atoms are present in 3 moles of chromium?
O 52.0 atoms
O 6.02 x 1023 atoms
O 1.80 x 1023 atoms
O 1.80 x 1024 atoms
Answer:
1.80 x 10^24 atoms
Explanation:
3moles × 6.022×10^23 atoms/mole
Which of the following is a homogeneous mixture .example sea water, muddy water, chalk water and oily water
Answer:
sea water
Explanation:
Perform each of the following operations as indicated. Express your answers to the correct number of significant figures and unit.
1. 5 x 10–7 kg + 3 x 10–7 kg
2. 4 x 105 kg + 6 x 105 kg
3. 1.66 x 1019 kg + 2.30 x 1019 kg
4. 7.2 x 10–12 kg - 2.6 10–12 kg
5. 3.8 x 10–12 m2 - 1.90 x 10–11 m2
6. 2.26 x 10–18 m2 - 1.8 x 10–18 m2
Why are black holes so difficult to detect?
Answer:
Black holes are so dense that light cannot escape from them, and they are difficult to detect. Satellites above the Earth's atmosphere can detect bursts of high energy radiation given off by black holes. Dozens of stellar black holes have already been detected in the Milky Way, where there may be tens of millions more.
Explanation:
please guys help me with this
Answer:
It's B.
Explanation:
1. Clouds form when water changes from a
A gas to liquid .
B liquid to gas.
C solid to gas
D solid to liquid.
Answer:
A. Gas to liquidExplanation:
I think the answer is A. gas to liquid. This is the correct answer... If you like this answer mark this answer as BRAINLIEST answer..Thank you ☺️☺️
Pls Help asap no rocky
The ____________________ metals are all of the elements located in groups 3-12 on the Periodic Table.
Answer:
Transition Metals are all of the elements kn group 3-12.
Jack, an Investigator, wants to prove that a certain suspect was present at the crime scene when the crime was committed. What kind of
evidence should he look for?
Jack should look for __________ evidence because the analysis of such evidence can prove whether the person was present when the crime
was being committed. This evidence refers to tiny fragments of material that can be transferred from a human to a human or human to a
location
(forensic science question)
Answer: TRACE evidence
Explanation: Any evidence that can be transferred from one person to another or one person to a place is trace evidence. Also I took the test.
PLEASE HELP AND THANKS
Answer:
torque =force*distance
An atom contains 16 protons, 18 neutrons, and 16 electrons what is its mass number?
Name the element of which this is an isotope.
16
protons
18
neutrons
16
electrons
Right from the start, you know that you're indeed dealing with a neutral atom, since the number of protons it has in its nucleus is equal to the number of electrons it has surrounding its nucleus.
Now, an atom's atomic number,
Z
, tells you how many protons it has in its nucleus. Nothing more, nothing less.
In your case, you are told that the atom contains
16
protons in its nucleus, which means that
Z
will be equal to
Z
=
16
A quick look in the periodic table will reveal that you're dealing with an atom of sulfur,
S
.
An atom's mass number,
A
, tells you how many protons and neutrons it contains in its nucleus. Since the number of protons is given by
Z
, you can say that
A
=
Z
+
no. of neutrons
In your case, the atom contains
18
neutrons in its nucleus. This means that
A
will be equal to
A
=
16
+
18
=
34
Finally, focus on the atom's electron configuration, which you know that must account for a total of
16
electrons.
S:
1
s
2
2
s
2
2
p
6
3
s
2
3
p
4
Its noble gas shorthand notation, which uses the electron configuration of neon,
Ne
, the noble gas that comes before sulfur in the periodic table, will look like this
S:
[
Ne
]
3
s
2
3
p
4
How are u supposed to tell how many neutrons and electrons an element has?? Pls help if u know the answer.
Answer:
Explanation:
The atomic number (number at the top) is the amount of protons and the amount of electrons. So if an element has an atomic number of 5, you know that it has 5 protons and 5 electrons. The atomic mass (number at the bottom) is the amount of protons and neutrons added together.
PLEASE HELP ME IMPORTANT
how many moles are in 500 g of copper
how long does it take for stirring and heat to dissolve in water?
Answer:
5-20 mins
Explanation:
Mention 5 uses of methane
Answer:
Used as rocket fuel, is a fertilizer ingredient, used in cooking, used to provide lighting, and used in production of other compounds
Explanation:
Hope this helps!!!
HELP ASPAP!!!!!!!!PLEASE PLEASE
Answer:
what do you need help with?
Explanation:
Glucose is an example of which Carbon-based macromolecule?
proteins
carbohydrates
lipids
nucleic acids
Answer:
Monosaccharides are the most basic units of carbohydrates. These are simple sugars, including glucose, fructose, and others. They contain between three and seven carbon atoms, have a sweet taste and are used by the body for energy.
Dissolving salt in fresh water to make salt water is Chemical or Physicals
Answer:
chemical
Explanation:
i did that stuff in 5th grade
I think I'm allergic to garlic powder. Tonight I am making pasta and will not use garlic powder this time. If I get itchy or not is what kind of variable?
Answer:
Explanation:
A garlic allergy is rare. If you're allergic to garlic, you can be allergic to cooked or raw garlic, or to all forms. A garlic allergy is caused when your body's immune system mistakenly identifies garlic as being harmful and produces antibodies in an attempt to fight it off. Does this help?
Answer
Dependent
Explanation:
You will react depending on the presence of garlic powder
Calculate the density of the items below. (D = M/V)
1) M = 15g V = 5.0ml *
Answer:
The answer is 3.0 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 15 g
volume = 5 mL
We have
[tex]density = \frac{15}{5} \\ [/tex]
We have the final answer as
3.0 g/mLHope this helps you
HELP! PLZZ! NEED THIS DONE ASAP!
Answer:
B)
Explanation:
A student measured the mass of some sodium chloride for a lab. the lab called for 6.25 g (the accurate measurement ) , but the student measured 6.00 g instead . what is the percent error for this mass ? Show your work .
Answer:
The answer is
[tex] \huge 4\%[/tex]
Explanation:
The percentage error of a certain measurement can be found by using the formula
[tex]P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ [/tex]
From the question
actual mass = 6.25 g
error = 6.25 - 6 = 0.25
So we have
[tex]p(\%) = \frac{0.25}{6.25} \times 100[/tex]
We have the final answer as
4 %Hope this helps you
Compound I --> 75g total, 52.46g iron, 22.54g oxygen, Compound 2 --> 56g total, 43.53g iron, 12.47g oxygen
PLEASE HELP
Answer:
1*6
Explanation: