10 points and brainest
Answer:
B. Its direction changes, it's speed changes, and it's wave length changes.
Explanation:
If not, I'm sorry I'm not that smart or it might be d. I don't know
Answer: no one needs this anyway
Explanation:
Which bonds form in this reaction used to make ammonia, NHg?
Answer:the bonds between the two nitrogen atoms and between each pair of hydrogen atoms
Explanation:
Answer: the bonds between the nitrogen and hydrogen
Explanation: I just did it but it's possible you might have a different question
How would you decrease the mass number?
Answer:
Protons are positively charged. When a nucleus emits an alpha particle, these changes happen: the mass number decreases by 4. the atomic number decreases by 2.
Explanation:
What frequency is radiation with a wavelength of 5.00 x 10^-6 cm? In what region of the electromagnetic spectrum is this radiation?
P.S it's due today
Answer:
f = 6 × 10^15 Hz in the ULTRAVIOLET (UV) region
Explanation:
Using λ = v/f
Where;
λ = wavelength (m)
v = speed of light (3 × 10^8m/s)
f = frequency (Hz)
According to this question, λ = 5.00 x 10^-6 cm
= 5.00 x 10^-8 m
λ = v/f
f = v/λ
f = 3 × 10^8 ÷ 5.00 x 10^-8
f = 0.6 × 10^(8+8)
f = 0.6 × 10^16
f = 6 × 10^15 Hz
In the electromagnetic spectrum (EM), a frequency of 10^15 is found in the ULTRAVIOLET region. This means that this radiation with a wavelength of 5.00 x 10^-6 cm and frequency of 6 × 10^15 Hz is in the ULTRAVIOLET region of the EM spectrum.
The SI unit for force is the
Answer:
Newton, symbol N
How many grams do 3.6 × 10^20 atoms of sodium weigh?
Answer in units of g.
Answer:
i
Explanation:
3.A sample of chlorine contains 75% of 35
17Cl and 25% of 37
17Cl.
Calculate the relative molecular mass of chlorine.
Answer:
35.5
Explanation:
Given parameters:
Abundance of chlorine Cl - 35 = 75%
Mass of Cl - 35 = 35
Abundance of Cl - 37 = 25%
Mass of Cl - 37 = 37
Unknown:
Relative molecular mass = ?
Solution:
The relative molecular mass of the chlorine can be deduced using the expression below:
Relative molecular mass = (abundance x mass of Cl - 35) + ( abundance x mass of Cl - 37)
Relative molecular mass = (75% x 35) + (25% x 37) = 35.5
which part of a human cell contains chromosomes
Answer:
nucleus
Explanation:
Help please please
Science atoms
Quick help
Answer:
step 3
Explanation:
electrons have a negative charge which is -1
protons have carry a positive charge +1
neutrons possessing no net charge which is 0
If body fat has a density of .94g/mL and 4.0L of fat is removed, how many pounds of fat were removed?
Answer:
8.3lb of fat were removed
Explanation:
To solve this problem we need to convert the liters of fat removed to mL. Using the mL and density we can find the grams. To convert grams to pounds we must use (1lb = 453.592g):
mL fat:
4.0L * (1000mL / 1L) = 4000mL
g fat:
4000mL * (0.94g / mL) = 3760g of fat
lb fat:
3760g of fat * (1lb / 453.592g) =
8.3lb of fat were removedwhich part of the human body is more complex your heart of the circulatory system
Answer:
The circulatory system
Explanation:
The human body has two circulatory systems, the pulmonary system, and the systemic system.
Instruction: restate the background information in your own words what is Charles law a relationship do you expect to see between volume and temperature? Why?
Answer:
detail is given below.
Explanation:
Charles Law:
According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.
Mathematical expression:
V₁/T₁ = V₂/T₂
V₁ = Initial volume
T₁ = Initial temperature
V₂ = Final volume
T₂ = Final temperature
It means when we increase the temperature volume is also goes to increase and vice versa.
Let's consider the example,
V₁/T₁ = V₂/T₂
V₂ = V₁T₂/T₁
V₂ = 4.5 L × 348 K / 298 k
V₂ = 1566 L.K / 298 K
V₂ = 5.3 L
We can see when temperature is increase from 298 K to 348 K volume is also increased from 4.5 L to 5.3 L.
In the equation 2A1 + 3Fe(NO3)2 + 3Fe + 2AI(NO3),
iron has been replaced by what ?
Answer:
2Al +3Fe(NO3)2 --------> 3Fe + 2Al(NO3)3
In the above reaction Aluminum and iron nitrate reacts to produce iron metal and aluminum nitrate so aluminum is replace by iron
I’ll give people points if they answer this plz(math)
Which of the following types of radiation from the Sun has the longest wavelength?
A) gamma
B) infrared
C) ultraviolet
D) visible
Answer:
B) infrared im pretty sure
Answer:
Infrared
Explanation:
NH4 oxidation number
How many moles of methanol must be burned to release 1454 KJ of energy
PLSSS HELP. And there’s also at the bottom of the picture another option if u didn’t see it
Answer:
B. Gradualism
Explanation:
what host is used to make the flu vaccine and why can this host be a problem for some people?
Radon-222 3.8 days
How many half lives have occurred if 12.5% of Rn-222 remains?
I need someone to explain how you do this to me?
3 half-lives have occured
Further explanationGiven
Half-life Radon-222 = 3.8 days
12.5% of Rn-222 remains
Required
Half-lives occurred
Solution
General formulas used in decay:
[tex]\large{\boxed{\bold{N_t=N_0(\dfrac{1}{2})^{t/t\frac{1}{2} }}}[/tex]
T = duration of decay
t 1/2 = half-life
N₀ = the number of initial radioactive atoms
Nt = the number of radioactive atoms left after decaying during T time
12.5% of Rn-222 remains ⇒ Nt/No = 0.125
Input the value :
[tex]\tt 0.125=\dfrac{1}{2}^{t/3.8}\\\\\dfrac{1}{2}^3=\dfrac{1}{2}^{t/3.8}\\\\3=t/3.8\\\\t=11.4\rightarrow 3~half-lives[/tex]
A pan containing hot water is left on the counter and becomes cool mainly due to....
A. water molecules moving apart.
B. cold air penetrating the hot water.
C. heat from the water moving into the cooler air.
D. hot water reacting with the metal pan.
Answer:
C. heat from the water moving through the cooler air
I think it's C because when something cools down, it has to reach a point of thermal equilibrium with the matter (in this case air) around it. So heat transfer happens through convection from the heat in the pan to the cooler surrounding air. The heated air becomes less dense and rises, while cooler air, sinks to the surface of the water, gets heated, and rises. This convection cycle keeps happening until the water in the pan is around the same temperature with the air around it.
Aqueous copper(II) sulfate solution is placed in an iron container and left to stand for several days. Which statement describes what happens? A) Atmospheric oxygen reacts with the copper(II) sulfate to give black copper(II) oxide. B) Some fine iron particles are formed in the solution. C )The part of the container in contact with the solution is coated with copper. D) The solution turns from green to blue.
Answer:
C )The part of the container in contact with the solution is coated with copper.
Explanation:
To understand the answer to the question, we must have a good knowledge of the electrochemical series.
Remember that iron is above copper in the electrochemical series. This means that iron can replace copper in an aqueous solution of a copper salt.
The following reaction occurs in the container;
Fe(s) + CuSO4(aq) -----> FeSO4(aq) + Cu(s)
This is why the part of the solution in contact with the container becomes coated with copper.
What is a colander used for?
A
measuring liquid and dry ingredients
B
straining liquid out of food
C
mixing ingredients together
D
separating egg yolks from the whites
Answer:
b is the answer have a good day
Which of these is a difference between a single skin cell and the skin tissue that covers an entire hand?
A.
A skin cell has a less complex structure than skin tissue has.
B.
A skin cell provides protection, but skin tissue does not.
C.
A skin cell grows more than skin tissue grows.
D.
A skin cell contains fluid, but skin tissue does not.
Answer:
A. A skin cell has a less complex structure than skin tissue has.
Explanation:
A skin cell has a less complex structure than skin tissue has. Hence option A is correct.
What is cell?Cell is defined as the smallest unit that can sustain life on its own and makes up all living things, including the body's tissues. The three essential parts of a cell are the cell membrane, nucleus, and cytoplasm. From bacteria to humans, cells give all living things their structure and functionality.
The tiniest, structurally and functionally distinct, and typically microscopic, unit of an organism is called a cell. The several forms of material made up of specialized cells and their byproducts are referred to as tissues. Cells are very small. The size of tissues is macro.
Thus, a skin cell has a less complex structure than skin tissue has. Hence option A is correct.
To learn more about cell, refer to the link below:
https://brainly.com/question/3142913
#SPJ3
Plz help
I don't know chem that well
