Answer:
Most likely phosphorus, antimony, arsenic, boron, indium or gallium. The wiring is composed mainly of copper, gold, and silver.
A fertilized egg receives 50% of its chromosomes from a sperm and 50% from the egg. Which process ensures that the sperm and egg contain only 50% of the chromosomes of an organism?
A.fertilization
B.meiosis
C. mitosis
D.mutation
Answer:
B
Explanation:
Meiosis ensures that the sperm and egg contain only 50-50.10% of the chromosomes of an organism.
What is the empirical formula for a compound that is 83.7 % carbon and 16.3 % hydrogen?
Explanation:
First, you need to be sure the elemental analysis has identified all the components.
83.7+16.3=100% so we’re good, and the same ratio works for the formula,
The formula is CxHy, so x*12+y*1= 100% of the empirical formula wt, which we’ll use later to confirm the elemental analysis. We need x and y
Then x = 83.7/12 is 6.975 and being savvy, we guess it’s supposed to be 7, since empirical formulas use whole numbers if they can. Likewise y=16.3/1 = 16.3, and now we round down to the nearest whole number (16), making our empirical formula C7H16
Check:
7*12+16*1=100 (the empirical formula wt) 84/100=0.84 and 16/100=0.16 This is close enough, so C7H16 is the empirical formula.
Chemistry
Definition in your own words
Will check if you got it from online.
Word: Melt
When a solid turns into a liquid
Example: Ice cube melts into water
__________________________________
MELTING IS A SPECIFIC CATEGORY OF CONVERTING A STATE OF MATTER. SPECIFICALLY, SOLID TO LIQUID.__________________________________
organizing a birthday party essay(around 150 words)
Answer:
Organizing a Birthday Party
On 20 June I was born and every year me and my parents celebrate my birthday in our house. But, This time I had an idea to organize my birthday party in a Big Hall where all my classmates and society friends will join me and we'll play lots of games and Have an amazing party.
So, I discussed my this idea with my father and he said "Okay, we'll celebrate your birthday this time as you wish". Then I took help from my GrandPa to send out invitation cards to my friend's and my father was going to book a Big Party Hall in 'The Calves Restaurant' where we will celebrate my birthday and my mother helped me in getting game ideas which we will play on the birthday.
On Birthday (20th June), when everybody arrived one of my friend sang a beautiful Birthday song from me. Then I blew out the candles off the cake. We also had games like Ludo, carrom, passing pillow, musical chair, and etc. At the end we had DJ where all my friends and my family members enjoyed. This was an amazing party to everyone.
Explanation:
Hey, if I solved your problem then please give rating to my answer and mark me as brainlist.
Thank-you,
Two 4-grams paper towels are identical except for their thermal energies. Which paper towel has a higher temperature.
a- The paper towel with more thermal energy
b- The paper towel with less thermal energy
pls answer
Answer:
a- The paper towel with more thermal energy
Explanation:
The paper towel with a higher temperature is one with more thermal energy.
Temperature is the degree of hotness or coldness of a body. And it is a measure of the average kinetic energy of the particles within a medium or body.
As body gains more thermal energy which is a form of kinetic energy, the average kinetic energy of its particles increases.
This will in turn lead to an increase in the temperature of the substance.
So, the paper towel with more thermal energy will have a higher temperature.
How are protons and neutrons similar? How are they different?
Answer:
They are both in the nucleus of an atom, they have different charges
Explanation:
Protons and neutrons are similar because they are both in the nucleus of the atom, being orbited by the electron(s). They are different, however, because they have different charges, the proton is positively charged and the neutron is neutral.
hope this helped:)
Which of the following food changes represent a physical change
A. Toasting bread
B.cooking beans
C. Mixing kool-aid
D. Frying an egg
Which of the following Sl unit prefixes represents a value one-thousand times smaller than a
base unit? *
kilo-
deci-
centi-
milli-
PLS HURRY
How many hydrogen atoms are in CH4
Answer:
Four hydrogen atoms are present
What is a balanced chemical equation for the formation of a polymer via a condensation reaction from the monomers succinic acid and ethylenediamine
Answer:
See explanation
Explanation:
Polymerization refers to the formation of a macro-molecule by the aggregation of small molecules called monomers. Monomers are the small molecules that are joined together to form a polymer.
The formation of a condensation polymer is accompanied by the loss of a small molecules such as water as shown in the image attached.
Succinic acid reacts with ethylenediamine to form a nylon type polymer. The nature of this reaction is detailed in the image attached to this answer. Recall that a polymer may contain (n) number of monomers joined together in the macromolecule.
Which of the following atoms has sixvalence electrons?
A. sulfur (S)
B. silicon (Si)
C. magnesium (Mg)
D. argon (Ar)
How many molecules are there in a group that has a mass in grams that is the same
numerically as the mass of the individual molecules in grams?
Answer:
1.00 mole of any element has a mass numerically equal to its atomic mass in grams and contains 6.022×1023 particles.
The initial velocity of a car is 10 m/s to the north. The car undergoes an acceleration of 2 m/sto the north for 4 seconds. What is the
car's new velocity?
Answer:
18m/s
Explanation:
Given parameters;
Initial velocity = 10m/s
Acceleration = 2m/s²
Time = 4s
Unknown:
Car's new velocity = ?
Solution:
We use one of the kinematics equation to solve this problem:
v = u + at
v = new velocity
u = initial velocity
a = acceleration
t = time
v = 10 + (2 x 4) = 18m/s
Find the atomic mass unit of Silicon-28, Silicon-29, Silicon-30 with masses of 27.977, 28.976, 29.974, respectively.
Answer:
28.085
Explanation:
The formular to obtain average atomic mass unit from isotopes is given as;
sum of (Percentage abundance * Atomic mass) of all isotopes = Average atomic mass unit
Silicon 28 = 92.23%
Silicon 29 = 4.67%
Silicon 30 = 3.1%
(92.23 / 100 * 27.977) + (4.67 / 100 * 28.976) + (3.1 / 100 * 29.974) = Average atomic mass
Average atomic mass = 25.803 + 1.353 + 0.929 = 28.085
Calculate the mass of nitrogen dissolved at room temperature in an 93.0 LL home aquarium. Assume a total pressure of 1.0 atmatm and a mole fraction for nitrogen of 0.78.
Answer:
84.6g of nitrogen is the mass dissolved in a home aquarium
Explanation:
Using combined gas law:
PV = nRT
We can solve for the mass of nitrogen solving the total moles of the aquarium and with the mole fraction as follows:
P = 1.0atm
V = 93.0L
R = 0.082atmL/molK
T = 20°C + 273.15 = 293.15K Assuming room temperature as 20°C
PV / RT = n
1.0atm*93.0L / 0.082atmL/molK*293.15K
3.87 = moles of gas
As mole fraction of nitrogen in the air is 0.78, moles of nitrogen are:
3.87 * 0.78 = 3.02moles of nitrogen
As molar mass of nitrogen gas, N₂, is 28g/mol:
3.02 mol N₂ * (28g / mol) =
84.6g of nitrogen is the mass dissolved in a home aquariumEthanol is a common laboratory solvent and has a density of 0.789 g/mL. What is the mass, in pounds, of 49.0 gal of ethanol
Answer: The mass of the ethanol is 322.6 pounds
Explanation:
Density is defined as the mass contained per unit volume.
[tex]Density=\frac{mass}{Volume}[/tex]
Given : Mass of ethanol = ?
Density of ethanol= [tex]0.789g/ml[/tex]
Volume of ethanol = 49.0 gal = 185485 ml ( 1gal=3785ml)
Putting in the values we get:
[tex]0.789g/cm^3=\frac{xg}{185485ml}[/tex]
[tex]x=146347g=322.6pound[/tex] (1g=0.00220462pound)
Thus the mass of the ethanol is 322.6 pounds
Please help me answers
Answer:
D earth formed 4.5 billion years ago.
Could Rutherford make any conclusions about electrons based on the result of experiment?
Answer:
They are so small that they barely make up any of the mass of the atom, and they are so miniscule that during Rutherford 's Gold foil experiment ,they didn't even react with the alpha particles. They circle the nucleus on a ring. shown through Rutherford Atomic Model
hope it helps you
Cl2+2KI→2KCl + I2 is an example of which type of reaction?
Question 1 options:
decomposition
combination
combustion
single replacement
Answer:
single replacement
Explanation:
I took the test :)
Cl₂ + 2KI → 2KCl + I₂ is an example of single replacement reaction. Therefore, option D is correct.
What is an single replacement reaction ?A single-replacement reaction is a chemical reaction in which one element replaces by the another in a compound. The general equation is. A + BC ⇒ AC + B.
An example of a single replacement reaction occurs when the element potassium reacts with water, then the colorless solid compound potassium hydroxide formed, and hydrogen gas is release. The equation for this reaction is as follows:
2K + 2H2O ⇒ 2KOH + H.
There are three main types of single replacement reactions are metal replacement, hydrogen replacement and halogen replacement reaction.
Thus, option D is correct.
To learn more about single replacement reaction, follow the link;
https://brainly.com/question/13903783
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A cylindrical glass bottle 21.5 cm in length is filled with cooking oil of density 0.953 g/mL. If the mass of the oil needed to fill the bottle is 1360 g, calculate the inner diameter of the bottle.
Answer:inner Diameter =9.19cm
Explanation:
Density is calculated as Mass/ Volume
therefore
Volume= Mass/ Density = 1360g/ 0.953g/ml=1,427 ml
1ml = 1cm³
1,427ml = 1,427cm³
Also We know that Volume of a cylinder = πr²h or πr²l
1,427cm³ = 3.142 x r² x 21.5 cm
r² = 1,427cm³/ (3.142 x 21.5cm)
r² =21.124cm²
[tex]\sqrt{21.124}[/tex]= r²
r= 4.596cm
Diameter= 2 x radius
=2 x 4.596
=9.19cm
On the Kelvin temperature scale, which value approximately represents the freezing point of water?
Bolling
point of
water
1104
27215-
100
100.00
200
290
Reezing
point
of water
273.15-
0.00
Absolute
zero
273.15
Kelvin Scale
Celsius Scale
O A. 32
B. 100
0273
OD 0
Answer: freezing point of water 273.15K, boiling point of water 373.15 K
Explanation:
The Kelvin scale starts at the lowest possible temperature, absolute zero. This is 0 Kelvins (K)= -273.15 deg C. Hence water freezes at 0 deg C = 273.15 K and boils at 100 deg C = 373.15 K
Given the equation representing a reaction:
H + H -----> H2
Which statement best describes the energy change in this reaction?
A. a bond is broken as energy is absorbed
B. a bond is broken as energy is released
C. a bond is formed as energy is formed
D. a bond is formed as energy is released
Answer:
(4) A bond is formed as energy is released.
Explanation:
Quizlet
A bond is formed as energy is released best describes the energy change in
the reaction.
Hydrogen atoms share their electrons to form a hydrogen molecule( H₂) .
Covalent bonds are the types of bonds formed when it occurs.
The formation of the bond results in energy being released. On the other
breaking of bonds involves energy to be absorbed. The stated facts
confirms D as the most appropriate choice.
Read more on https://brainly.com/question/1853488
A 232 mL cup of whole milk contains about 27 mg of cholesterol. Express the cholesterol concentration of the milk in kilograms per cubic meter (kg/m3).
cholesterol concentration: kg/m^3
Explanation:
Cholesterol concentration = 27 mg/ 232 mL
Change unit mg/ml to kg/m³
1 kg = 1000 g
1 g = 1000 mg
1 kg = 1000000 mg
1 kg = 10⁶ mg
10⁶ mg = 1 kg
1 mg = 10^-6 kg
m³ = 1000 L
1 L = 1000 mL
m³ = 1000000 mL
m³ = 10⁶ mL
10⁶ mL = m³
1 mL = 10^-6 m³
Cholesterol concentration = 27 mg/ 232 mL
27 × 10^-6 kg/ 232 × 10^-6 m³
= 27/232 kg/m³
what is moore’s law? how does it affect the capabittlies of computers? (PLS HELP ME I NEED THE ANSWER RN! PLS & THANK YOU)
Answer:
Moore's Law refers to Moore's perception that the number of transistors on a microchip doubles every two years, though the cost of computers is halved. Moore's Law states that we can expect the speed and capability of our computers to increase every couple of years, and we will pay less for them.
A person travels 10 miles in 5 minutes. What is that person’s speed?
Answer:
I think it might be 2 miles per hour
what type of amixture are separarted using separating funnel?
Answer:A separating funnel is funnel that is used to separate immiscible liquids. Liquids that do not mix with each other are said to be immiscible. Two immiscible liquids, such as oil and water, can be separated by using a separating funnel.
Explanation:
Answer:
Immisicible liquids
Explanation:
A separating funnel is funnel that is used to separate immiscible liquids. Liquids that do not mix with each other are said to be immiscible. Two immiscible liquids, such as oil and water, can be separated by using a separating funnel.
Charlotte is driving at 69.8 mi/h69.8 mi/h and receives a text message. She looks down at her phone and takes her eyes off the road for 4.71 s.4.71 s. How far has Charlotte traveled in feet during this time?
distance: _______ ft
Answer:
482.2 ft.
Explanation:
Hello!
In this case, considering that Charlotte drives at 69.8 mi/h, the first thing we need to do is to convert that velocity to ft/s as shown below:
[tex]69.8\frac{mi}{h}*\frac{5280ft}{1mi} *\frac{1h}{3600s}=102.37\frac{ft}{s}[/tex]
Thus, the travelled distance is obtained by multiplying the new velocity by the elapsed time:
[tex]d=102.37\frac{ft}{s} *4.71s\\\\d=482.2ft[/tex]
Best regards!
I am one of the elements. I am a soft representative metal, and you can cut me with a knife, but watch out because I am highly reactive. I have the smallest atomic number of any element in my period. Within my group I have the largest atomic radius of the elements that have no d-electron shells filled. Who am I
Answer:
Potassium
Explanation:
From the given riddle. Potassium is the right answer. This because on the periodic table, potassium has the smallest atomic number of any element in its period with the electronic configuration 1s2 2s2 2p6 3s2 3p6 4s1, it has the largest atomic radius within its group because the radius has no d-electron shell filled. Potassium is a soft metal but contains high reactivity.
He has an atomic number of 2. The number of __________________equals the number of
______________, it has ____ electrons.
Answer:
1- Hélium
2-protons
3-Electrons
4-2
Respectively thx
In a typical mass spectrum, a smaller signal is observed at a mass 1 amu higher than the molecular ion peak. Why
Answer:
Answer is explained below in the explanation section
Explanation:
Smaller signal is observed at a mass 1 amu because small percentage of the compound will have carbon isotope of 13C instead of 12C.
As we know, mass spectrometry is done as a small compound is first vaporized and then bombarded to ionize it. And then, those ions are accelerated forward and then at some point ions are separated and deflected by the application of magnetic field.
And finally hits the detector to give us a spectrum to read. So, in this whole procedure, there can be a small percentage of carbon isotope of 13C instead of 12C in that compound and showed in the spectrum as a smaller signal at a mass 1 amu.
