The number of phosphorus atoms : 2.408 x 10²⁴
Further explanationThe mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
moles of Mg₃(PO₄)₂ = 2
moles of phosphorous(P) atoms in Mg₃(PO₄)₂ ⇒ mol ratio of elements in the compound(for P=2)
[tex]\tt 2\times 2=4[/tex]
The number of atoms of phosphorous(P) :
[tex]\tt 4\times 6.02\times 10^{23}=2.408\times 10^{24}[/tex]
Find the measure of the missing angle.
a = ?
Explain why Ra is larger than Be. With 2 points.
Explanation:
Radium(Ra)=>atomic number=88
BERYLLIUM (Be)=>atomic number =4
why is Ra larger than Be
1. since the atomic number of Ra is greater than Be, the number of electrons is more, which means there are more number of shells present in Ra than Be. (atomic Radius)2. the more the valence electron (excluding fully filled ones) the less is the nuclear attraction forcesince Ra has more valence electron in its outermost shell, the nuclear attraction force is less which means that Ra 's size is greater than Be.hope it helps:)
Which is a difference between plant and animal cells?
Question 7 options:
An animal cell can produce energy, because it has mitochondria.
A plant cell has a well defined shape, because it has a cell wall.
A plant cell can store genetic information, because it has a nucleus.
Molecules can only pass into an animal cell because it has a cell membrane.
Answer:A plant cell has a well defined shape, because it has a cell wall.
Explanation:
PLEASE HELP ME OUT
The table lists some characteristics of two planets
Mercury Mars
Mass 3.3x10^23kg 6.42x10^23kg
gravity 3.7 m/s^2 3.7 m/s^2
Distance 4879km 6792km
Which statement is true?
A. mars diameter is less than mercury's
B. Objects weight is the same everywhere in the universe
C Mercury and Mars have the same gravitational force.
D. Mars's mass is less than Mercury's
Answer: C
Explanation: Mercury and Mars have the same gravitational force. I got it right
If an object has a density of 500g/ml and a volume of 50ml, what is its mass?
A.100ml
B.250g
C.55ml
D.45mk
1 points)
You have 300 grams of Al2(CO3)3. How many moles are produced?
Answer:
0.5133805136 moles.
Explanation:
1 gram of Al2(Co3)3 equals 0.0017112683785004 moles, we need the amount of moles produced in 300 grams of Al2(CO3)3, so we have to multiply 1 gram of Al2(CO3)3 times 300: 0.0017112683785004 x 300, in conclusion,
300 grams of Al2(Co3)3 equals 0.5133805136.
Which statement is true of the rock cycle?
A. subsurface events include: compaction cementation and deposition
B. surface events include: weathering erosion and deposition
C. subsurface events include: melting pressure and erosion
D. surface events include: cooling, heat and pressure, melting
Answer:
c
Explanation:
igneous, sedimentary, and metamorphic. igneous forms from molten rock cools and solidifides
When a paper towel absorbs water, is it a physical or chemical change?
Answer:
It is a physical change.
Explanation:
I am clueless on this question please help me !
The Answer is B, 18 smores.
Explanation:
It takes simple math. There are 36 graham crackers. You divide it by 2 because you have to use 2 crackers for each smore. There is more than enough marshmallows and squares of chocolate to make 18 smores.
You can only make 18 smores because even though there's a lot of marshmallows and square of chocolate, there is no more graham crackers to make more smores.
Hope this helped :)
Its B, trust me
Im smart
Changes in either _______ or _______ can cause a change in the state of matter.
A. Temperature or Pressure
B. Temperature or Matter
C. Matter or Pressure
Answer:
A. Temperature or Pressure
Explanation:
Which molecule contains a non polar covalent bond? 1) O=C=O 2) C=O 3) Br-Br 4) CCL4
Answer:
3) Br-Br
Explanation:
Polarity occurs between Two atoms of unequal electronegativities.
since Br-Br contain only one atom ( ie.Bromine), they have equal electronegativity. So they can't be polar.
how elements are arranged in the groups of periodic table
Answer:
Explanation:
The chemical elements are arranged in order of increasing atomic number. The horizontal rows are called periods and the vertical columns are called groups. Elements in the same group have similar chemical properties. This is because they have the same number of outer electrons and the same valency.
Which prefix is the smallest?
Answer:could it be kilo
Explanation:it looks like it has the least letters
what is the significance of tempreture to °c?
In an experiment, the one variable that is changed is called the
(multiple choice) What is the SI unit of mass?
Newton
Gram
Ounce
Pound
I don't understand and I'm getting multiple answers but I have one attempt so please please provide an explanation!!
Answer:
Gram
Explanation:
The SI unit of mass is grams.
Mass is the measure of matter contained in a substance. It is usually determined by weighing an amount of substance on a balance or scale.
Mass is a fundamental quantitySo, the unit of mass is grams. Ounce and pounds are other units but not the standard one. Newton is the unit of force and weight.A strand of DNA has the following order of bases: CGTATGCA. What is the matching ( complimentary) strand
Answer:
GCATACGT
Explanation:
A=T
G=C
C=G
T=A
This key goes with any complementary DNA strand.
Hope this helps you out!
I need help please!!!
Answer:
Al has a charge of +3
Cl has -1
So you want al Cl to cancel out the charges
Explanation:
Hence Al=+3
Cl=-1 x 3
Together they have a charge of 0
so The blue is +3
Red is -1
Left green is 1 right green is 3 (these have no sign)
Which statement best describes how deflating a soccer ball is evidence of matter?
a) The ball changes shape from round to flat.
b) The ball increases size and shape.
c) The mass of the ball has increased.
d) The temperature outside the ball has changed.
Answer:
The temperature outside the ball has changed
BALANCE the following equations then write the NET IONIC EQUATION for each one: ____Ni(NO 3 ) 2(aq) + ____NaOH (aq) → _____ Ni(OH) 2(s) + _____ NaNO 3(aq)
Answer:
Ni(NO3)2 + 2NaOH → Ni(OH)2 + 2NaNO3
NET IONIC EQUATION :
Ni +2(aq) + 2(NO3) -1(aq) + 2Na +1(aq) + 2OH -1(aq)
→ Ni(OH)2 (s) + 2Na +1(aq) + 2(NO3) -1(aq)
sorry there is no space to write the reaction in one line...
15 points
If calcium carbonate is heated strongly, carbon dioxide gas is driven off, leaving a
residue of calcium oxide. ((Write the unbalanced chemical reaction for this process))
If calcium carbonate is heated strongly, carbon dioxide gas is driven off , leaving a residue of calcium oxide then the unbalanced chemical reaction for this process is given as ,
[tex]CaCO_{3}[/tex] → [tex]CO_{2}[/tex] + CaO
A chemical equation that is out of balance has an uneven number of atoms from various elements in the reactants and products side . Chemical equations must be balanced since they are not accurately represented when they are unbalanced .
In balanced chemical equation the number of atoms in reactant side is equal to the number of atoms in product side .
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At 5 atmosphere pressure, the volume of a gas is 1200 ml. What pressure is required to reduce
the volume of a gas to 2000 ml without changing the temperature?
Answer:
3 atmExplanation:
The new pressure can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
Since we are finding the new pressure
[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]
From the question we have
[tex]P_2 = \frac{5 \times 1200}{2000} = \frac{6000}{2000} = \frac{6}{2} = 3 \\ [/tex]
We have the final answer as
3 atmHope this helps you
A scientist is studying a cross between plants that are heterozygous (Xx) for a certain trait. She will use a table similar to this one to make a Punnett square for the cross.
Which percentage of offspring will most likely have the genotype represented by the letter A in this table?
0%
25%
50%
75%
Answer:
25% XX
50% Xx
25% xx
Explanation:
see picture
Answer:
Your answer is B : 25% :)
Explanation:
B's correct on Edg for me.
Write the empirical formulas for the following compounds:
a) C,H,O,
b)
boron trichloride
c)
methane
d)
CH20.
SOMEONE HELP ME PLEASEEE
Elements in period 1 are
Answer:
Hydrogen - - helium..
...
if all atoms are composed of the same particles, how can there be more than 100 different elements?
Answer:
The number of protons determine the type of atom
What is the temperature range for ammonium nitrate crystals and a pouch of water?
Answer:
its cold
Explanation:
Calculate the average atomic mass of an element if an isotope with a mass of 55 amu has a natural abundance of 15% and an isotope with a mass of 56 amu has a percentage abundance of 85%. Please show your work and include appropriate units with your answer.
Answer:
Average atomic mass = F
1
M
1
+F
2
M
2
+...+F
n
M
n
Where F
1
,F
2
,...F
n
is the fraction representing the natural abundance of the isotope and M is the weight of the isotope.
Avg. At. Mass = (0.85×11)+(0.10×12)+(0.05×13)
= 9.35+1.2+0.65
Therefore, the average atomic mass = 11.2
What type of chemical reaction has only one product?
Answer:
synthesis reactions
Explanation:
Just as synthesis reactions can only form one product, decomposition reactions can only start with one reactant
How many atoms of phosphorus are in 6.00 mol of copper(II) phosphate?
The number of atoms of phosphorus in copper(II) phosphate is 7.23 x 10²⁴ atoms.
What is number of moles?The number of moles of a substance equals the ratio of its given mass in a chemical reaction to the mass of one mole of that substance.
One mole of any substance equals Avogadro's number, that is, 6.023 × 10²³ atoms.
Number of moles of phosphorous in the compoundcopper(II) phosphate is written as Cu₃(PO₄)₂.
1 mole of copper(II) phosphate = 2 moles of phosphorous
6.0 moles of copper(II) phosphate = ?
= 2 x 6
= 12 moles of phosphorous
1 mole of phosphorous = 6.023 x 10²³ atoms
12 moles of phosphorous = ?
= 12 x 6.023 x 10²³
= 7.23 x 10²⁴ atoms.
Thus, the number of atoms of phosphorus in copper(II) phosphate is 7.23 x 10²⁴ atoms.
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