Answer:
In February, we have selected iron, the most abundant element on Earth, with chemical symbol Fe (from the Latin word “ferrum”) and atomic number 26. A neutral iron atom contains 26 protons and 30 neutrons plus 26 electrons in four different shells around the nucleus.
Answer:
Iron's atomic number is 26 and it has 26 protons
Which of the following contains only one
type of atom?
A. element
B. solution
C. compound
Answer:
A. elements
I hope it's helps you
Answer:
A i think
Explanation:
Help! please i'm kinda stuck in here and i know it's really easy but i literally forgot
plz do this i need help ill give u brailiest
1. C
2. B
3. B
4. sorry, but we cant see the pictures. thats all I can do.
-Chad
Answer:
(1) Turgor, an internalstimulus, refers to energy in a plant cell.
(2) Osmosis moves materials in and out of the plant cell from areas of low to high concentration?
(3) When a plant is hypertonic,what is happening in the plantcell, and what will the plantlook like?
→ A. The vacuole is not full and the plant is wilted.
(4) What picture at the bottom of the page represents equilibrium orbalance in a cell?
→ Sorry the picture is not given
what's the agriculture
Answer:
the science or practice of farming, including cultivation of the soil for the growing of crops and the rearing of animals to provide food, wool, and other products.
Explanation:
Mark me as brainiliest
Answer:
Agriculture is a practice of farming, including cultivation of the soil for growing crops and the rearing of animals to provide food,wool and others.
Hope it helps !help i have no idea what i’m doing and i’m failing this class
Answer:
c
Explanation:
esuba is activation energy
A piece of metal with the mass of 254 g is placed in a 50.0 mL graduated cylinder. The water level rises from 25.0 mL to 46.5 mL, what is the density of the metal?
Density is simply defined as the mass per unit volume of a substance. Mathematically, it is expressed as:
[tex]Density = \frac{mass}{volume }[/tex]
To solve the question given above, we'll begin by calculating the volume of the metal. This can be obtained as follow:
Volume of water = 25 mL
Volume of water + metal = 46.5 mL
Volume of metal =?Volume of metal = (Volume of water + metal) – (Volume of water)
Volume of metal = 46.6 – 25
Volume of metal = 21.5 mLFinally, we shall determine the density of the metal. This can be obtained as follow:
Mass of metal = 254 g
Volume of metal = 21.5 mL
Density of metal =?[tex]Density = \frac{mass}{volume }\\\\Density = \frac{254}{21.5} \\[/tex]
Density of metal = 11.81 g/mLTherefore, the density of the metal is 11.81 g/mL
Learn more: https://brainly.com/question/19239648
Salt solution is homogeneous mixture.Give reason
Answer:
because mixed particles are invisible in this mixture.
Iron reacts with oxygen in the air to form rust. Predict the signs of enthalpy, entropy, and Gibbs free energy change for this process (for the system). Explain the sign for each one
An atom that has lost electrons is a:
Answer:
The atom that has lost an electron becomes a positively charged ion (called a cation)
PLEASE MARK ME BRAINLIESTAnswer: it’s a cation
Explanation:
Consider equal mole samples of dinitrogen monoxide, aluminum nitrate, and potassium cyanide. Arrange these compounds in increasing order of number of nitrogen atoms in each sample.
a. aluminum nitrate
b. potassium cyanide
c. dinitrogen monoxide
Answer:
potassium cyanide, dinitrogen monoxide, aluminum nitrate
Explanation:
Carry out the following conversions. Report your answers to the correct number of significant
figures.
(a) 75 cm to ft
ft
(b) 0.668 kg to lb
Ib
(e) 0.549 uL to qt
* 10-qt
(d) 9,991 mm to km
9.991 x 10 (select)
km
(e) 313 nm to mm
3.13 x 10 (select)
mm
(1) 7 ft to cm
* 102 cm
We want to perform some changes of units, such that the number of significant figures (the ones different than zero) does not change.
a) 75 cm to ft
We know that:
1ft = 30.48cm
1 = (1ft)/(30.48cm)
Now, remember that if we multiply a quantity by one we do not affect the quantity, so we can write:
75cm = 75cm*(1ft)/(30.48cm) = 2.5 ft
b) 0.668 kg to lb
we know that:
1kg = 2.20462 lb
then:
1 = (2.20462 lb)/(1kg)
0.668 kg = 0.668 kg*(2.20462 lb)/(1kg) = 1.47 lb
c) 0.549 uL to qt
We know that:
1 uL = 3.437*10^-9 qt
1 = (3.437*10^-9 qt)/(1 uL)
Then:
0.549 uL = 0.549 uL*(3.437*10^-9 qt)/(1 uL) = 1.91*10^-9 qt
d) 9.991 mm to km
we know that:
1mm = 1*10^-6 km
then:
1 = (1*10^-6 km)/(1mm)
So we can rewrite:
9.991 mm = 9.991 mm*(1*10^-6 km)/(1mm) = 9.991*10^-6 km
e) 313 nm to mm
We have:
1nm = 1*10^-6 mm
1 = ( 1*10^-6 mm)/(1 nm)
Then:
313 nm*( 1*10^-6 mm)/(1 nm) = 3.13*10^-4 mm
If you want to learn more, you can read:
https://brainly.com/question/24606249
Select all the correct answers.
What are the characteristics of prokaryotes?
A prokaryote lacks a well-defined nucleus.
A prokaryote cannot perform basic life functions.
A prokaryote lacks cell organelles.
A prokaryote is larger than a eukaryote.
eu vou colocar V(verdadeiro) F (falso)
1:F
2:F
3: V
4:F
explicação:
1 procariontes não apresentam núcleo
2 eles podem sim caso contrário os seres procariontes não sobreviveriam
3 ele possui organelas celulares
4 as células eucariontes são maiores e mais complexas.
CONCLUSÃO: a resposta certa é a 3
Someone answer this for me ty
Answer:
The answer for this is (B: Heat)
Consider a cloudless day on which the sun shines down across the United States. If 2559 kJ of energy reaches a square meter (m2) of the United States in one hour, how much total solar energy reaches the entire United States per hour? The entire area of the United States is 9,158,960 km2 .
In 1 hour, 2.344 × 10¹⁶ kJ of solar energy reaches the United States.
The entire area of the United States is 9,158,960 km². We will convert it to m² using the conversion factor 1 km = 10³ m, squared.
[tex]9,158,960 km^{2} \times (\frac{10^{3} m }{1km} )^{2} = 9.158960 \times 10^{12}\ m^{2}[/tex]
In order to find the amount of solar energy that reaches 9.158960 × 10¹² m² we will use another conversion factor: 2559 kJ of energy reaches a square meter of the United States in one hour.
[tex]9.158960 \times 10^{12}\ m^{2} \times \frac{2559 kJ}{m^{2}.h } = 2.344 \times 10^{16} kJ/h[/tex]
In 1 hour, 2.344 × 10¹⁶ kJ of solar energy reaches the United States.
You can learn more about unit conversions here: https://brainly.com/question/19420601
assuming that you attend school 180 days a year for 8 hours a day from first through 12th grade youd be in class for a total of 2160 school days how many total years would you have been in school by the time you graduate
Answer:
2160 days divided by 365 days which is a year is equal to about 5.9 years in school * sighhh*
5.91780821918
How many atoms of hydrogen are there in 36 g of NH4NH4?
explain in detail plz
Answer:
he formula mass of ammonia is 14 + 1 3 = 17. The number of moles in 36 g ammonia is 36/ 17 = 2.11mol. A mole is 6.02 10, so the number of hydrogen atoms in a 2.11 moles of ammonia is 2.11 *6.02*10^23 = 1.27 *10^24 atoms
Explanation:
Which of the following atoms would be an ion?
O A. An atom with 8 protons and 8 neutrons.
OB. An atom with 5 protons and 5 electrons.
C. An atom with 11 protons and 9 electrons.
D. None of these
Reset Selection
Answer:
[tex]because \: e = p \\ but \: e < p \\ therefore \: (c) \: is \: the \: right \: answer[/tex]
explain the importance of the periodic table
Answer:
the importance of the periodic table are,
To summarize, the periodic table is important because it is organized to provide a great deal of information about elements and how they relate to one another in one easy-to-use reference. The table can be used to predict the properties of elements, even those that have not yet been discovered.
Explanation:
hope its help for you
thank you
have nice day
If a container is strong enough to hold 62.0 pounds (lb) of gasoline, how many gallons can you put in there? The density of your gasoline is 0.720 g/cm3 .
1qt = 0.94635L
1gal = 4.0000qt
1 cm3 = 1mL (exact relationship, unlimited sig dig)
1lb = 453.59g
Answer = _____ gal (Put number only)
Taking into account the definition of density and change of units, if a container is strong enough to hold 62.0 pounds (lb) of gasoline, you can put 10.3184 gallons in there.
First you must know that density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.
In other words, density is the relationship between the weight (mass) of a substance and the volume it occupies (that same substance). Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
[tex]density=\frac{mass}{volume}[/tex]
On the other side, the rule of three is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.
That is, what is intended with it is to find the fourth term of a proportion knowing the other three.
If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other) , the direct rule of three must be applied.
To solve a direct rule of three, the following formula must be followed, where a, b and c are known values and x is the value to be calculated:
a ⇒ b
c ⇒ x
So, [tex]x=\frac{cxb}{a}[/tex]
The direct rule of three is the rule applied in this case where there is a change of units. To perform conversion of units from pounds to grams, you must first know that 1 lb = 453.59 g. So, if 453.59 g is 1 lb, how many grams equals 62 lb?
[tex]mass= \frac{62 lbx453.59 g}{1 lb}[/tex]
Solving:
mass= 28122.58 grams
Then, you know:
density= 0.720 [tex]\frac{g}{cm^{3} }[/tex]mass= 28122.58 gvolume= ?Replacing in the definition of density:
[tex]0.720\frac{g}{cm^{3} }=\frac{28122.58 g}{volume}[/tex]
Solving:
volume×0.720 [tex]\frac{g}{cm^{3} }[/tex]= 28122.58 g
[tex]volume=\frac{28122.58 g}{0.720\frac{g}{cm^{3} }}[/tex]
volume= 39059.14 cm³= 39059.14 mL= 39.05914 L (being 1 cm³= 1 mL= 0.001 L)
Now, to perform conversion of units from L to qt, you must first know that 1 qt = 0.94635 L. So, if 1 qt is 0.94635 L, how many qt equals 39.05914 L?
[tex]volume= \frac{39.05914 Lx1 qt}{0.94635 L}[/tex]
Solving:
volume= 41.2735 qt
Finally, to perform conversion of units from qt to gal, you must first know that 1 gal = 4.0000 qt. So, if 1 gal is 4 qt, how many gal equals 41.2735 qt?
[tex]volume= \frac{41.2735 qtx1 gal}{4 qt}[/tex]
Solving:
volume= 10.3184 gal
In summary, if a container is strong enough to hold 62.0 pounds (lb) of gasoline, you can put 10.3184 gallons in there.
Learn more about density:
brainly.com/question/952755?referrer=searchResults brainly.com/question/1462554?referrer=searchResultsCH3NH2+ H2N-CH2-COOH
CH3NH2+ Alanin
Answer:
i don't understand
Explanation:
Ii don't understand
hey please help man...
1. Cations are ____________ charged and have less ____________than ____________.
2. Anions are ____________ charged and have more ____________ than ____________.
3. Columns on the periodic table are known as ____________.
4. The elements in the first group are called ____________ and have ____________
valence electron(s).
Answer:
1. Cations are positively charged and have less electrons than protons.
2. Anions are negatively charged and have more electrons than protons.
3. Columns on the periodic table are known as groups.
4. The elements in the first group are called alkalis metals and have one valence electron.
Explanation:
I sorta forgot the answer someone help
Answer:
The energy stored within things :)
Find the volume of 1760 grams of copper
Answer:
(1760 ÷ 64) x 24.4 =671dm^3
Please help me please
Explanation:
1 sugar solution =Distillation
2 Iron powder and sand=magnetic separation
3 petrol and diesel= Fractional distillation
4 Camphor and glass powder = Sublimation
Did they scientist believe in God
Answer:
some of them not believe in God
is AU is homoatomic or heteroatomic?
Answer:
AU is homoatomic
Explanation:
Homo-atomic Molecule: Molecules provided by unique one variety of particles are associated as Homo-atomic molecules
Ex: H2, N2, P4 etc.
Hetero-atomic Molecule: Particles constituted by several kinds of atoms are identified as Hetero-atomic molecules
Ex: CO2, NO2, CH4, HCl etc
As AU is homoatomic because this element is formed by only one atom
To learn more about atomic structure refer:
https://brainly.com/question/16776207https://brainly.com/question/12578802
Where is the moon located in relation to Earth and the sun when it is a first-quarter moon?
The first quarter moon occurs halfway between new moon and full moon.
What is First Quarter moon ?From our perspective, the moon is partially lighted and is 90 degrees away from the sun in the sky.
We refer to it as the "first quarter" since the moon has only circled the Earth once since the new moon.
From Earth, you can view one-quarter of the moon, or half of the moon's illuminated side, which seems to be one-half of a pie.
Therefore, The first quarter moon occurs halfway between new moon and full moon.
Learn more about Moon here ;
https://brainly.com/question/13538936
#SPJ2
Alpha particle radiation will most likely result when
electrons gain energy.
atoms become charged.
two atoms are near one another.
the nucleus becomes unstable.
Answer:
electrons gain energy
Explanation:
Calculate the number of moles of carbon
atoms present in 2.9 g of ethanol (C2H6O)?
ANSWER IN MOL
Answer:
3.50 mol x 6.022 x 10^23
= 2.11 x 10^24 carbon atoms
Explanation:
1. moles = grams/molar mass
2. (mass nitrogen/mass amm sulfide)*100 = ??
3. mass Hg = volume x density
Then convert to moles.
Then remember there are 6.022E23 atoms for every mole.
8. Predict the missing products of the double replacement reaction: MgCl2 + Na2S—___+____
a. MgS + NaCl2
b. MgS + NaCl
c. MgNa + CIS
d. MgNa2 + Cl2S
Answer:
d.MgNa2+Cl2S
Explanation:
the reaction should balance on both sides