One of the ways to minimize a collision is to slow down: When you can't find an escape and you're definitely going to collide with something, you should slow your vehicle down as much as possible.
Hope this helps ^^
What is true about most of the wavelengths found in the electromagnetic spectrum?
A
They travel only through prisms.
B
They are found in the visible light range.
С
They are dangerous to humans.
D
They are invisible to the human eye.
You are working in the lab and spill some acid on the counter. Because you don't want to get into trouble, you decide to clean it up by yourself. What would be best to reduce the acidity of the spill?
Answer:
By adding baking soda
Explanation:
The best way to reduce the acidity of the spill would be to add some amount of baking soda to the spill and then clean it up with a towel or any other appropriate item.
Baking soda is made up of sodium bicarbonate and has the capacity to react with acid to produce a salt and carbonic acid. The carbonic acid readily decomposes to produce carbon dioxide and water. For example, sodium bicarbonate reacts with hydrochloric acid according to the equation below:
[tex]NaHCO_3 + HCl --> NaCl + H_2CO3[/tex]
[tex]H_2CO_3 --> H_2O + CO_2[/tex]
One would expect the addition of a base to the spilled acid to work in a way as to neutralize the acid but bases are also corrosive and only a stoichiometrically balanced quantity would completely neutralize the acid. Thus, the quantity might not easily be determinable and one can end up doing more harm than good.
Hence, the best option is to add baking soda to the spilled acid to reduce its acidity before cleaning it off.
A student measured the mask of an object to be 30.4g and the volume to be 3.5 mL. What is the density?
33.9 g/mL
26.9 g/mL
0.115 g/mL
8.69 g/mL
Answer: 8.69 g/mL
Explanation:
Answer:
Density = 8.69g/mL
Explanation:
Density = Mass/Volume
Density = 30.4g/3.5mL
Record observations of the reaction and
products in the data table.
The brown solid that formed is
Answer:copper
Explanation:edg 2021 ;)
Answer: B.) Copper
Explanation:
Most chemicals can be cleaned up with a general spill kit, but a few chemicals require specialized spill procedures. For each substance listed, determine whether a general spill kit is sufficient or if a specialized spill kit is needed.
a. hydrofluoric acid
b. special mercury
c. special phosphoric acid
d. acetone
e. general methanol
Answer:
a. hydrofluoric acid - Specialized spill kit is needed
b. special mercury - Specialized spill kit is needed
c. special phosphoric acid - General spill kit is Sufficient
d. acetone - General spill kit is Sufficient
e. general methanol - General spill kit is Sufficient
Explanation:
a. hydrofluoric acid -
It is a weak acid , and very corrosive therefore , it need Specialized spill kit
b. special mercury -
At the room temperature , liquid mercury evaporates. But Small amount of mercury can cause harm so , Specialized spill kit is needed
c. special phosphoric acid -
It is relatively compared to others is a week acid , therefore General spill kit is Sufficient
d. acetone -
At the room temperature , acetone evaporates, therefore General spill kit is Sufficient
e. general methanol -
At the room temperature , methanol evaporates, therefore General spill kit is Sufficient
The kind of spill kit required for the cleanup of chemicals is determined by the nature of the chemical.
The kind oft required for the cleanup of chemicals is determined by the nature of the chemical. If a chemical is highly corrosive or toxic, it follows that a special spill kit is required to clean up a spill of the chemicals in order to ensure minimum damage. The spill kit required for each chemical is shown below;
Hydrofluoric acid - Specialized spill kit is neededSpecial mercury - Specialized spill kit is neededSpecial phosphoric acid - General spill kit is SufficientAcetone - General spill kit is SufficientGeneral methanol - General spill kit is SufficientLearn more about spill kit: https://brainly.com/question/4915023
Gallium is one of the few metals that can melt at room temperature. Its melting point is 29.768C. If you leave solid gallium in your car on an early summer morning when the temperature is 75.08F, what physical state is the gallium in when you return to your car and the interior car temperature is 85.08F
Answer:
solid
Explanation:
If you were to leave the gallium in the interior of the car at those temperatures the gallium would still be in a solid physical state when you return. This is because the temperature in Fahrenheit when you return is 85.08F which converted to Celsius would equal 29.488C. This is close to Gallium's melting of 29.768C point but does not exceed it, meaning that it is close to melting but has not yet done so and is, therefore, still a solid.
% Yield (10 points): 8. Using the reaction above: a. Calculate the theoretical yield of the product if you started with 5 grams of the starting aldehyde (4 points). b. Calculate the theoretical yield of the product if you started with 3 grams of butyl MgBr (4 points). c. Which starting material is the limiting reagent (2 points)
Answer:
a) m = 7.9 g
b) m = 3.002 g
c) butyl MgBr
Explanation:
First, you are not providing the reaction, so if difficult to solve this without it. However, I manage to find a similar question so I'm gonna solve this on basis with that question. The picture attached has the question and reaction.
Now, according to the image we have a wittig reaction. Which is commonly used to convert an aldehyde into an alcohol. As we can see in the picture, the reaction starts with hexanal and butyl MgBr (Grignard reagent) in acid medium. This gives as a product the 5-pentanol.
Let's write again the reaction here:
C₆H₁₂O + C₄H₉MgBr -----------> C₁₀H₂₂O + OHMgBr
We can see that the reaction is perfectly balanced so we don't need to balance. And we also can see that we have a mole ratio of 1:1 between the reactants and the products, which means that the calculated moles of either one reactant or the other, would be the same moles of the products.
To calculate moles, and afterward, the yield, we need the molecular weight of all compounds:
MM C₆H₁₂O = 100 g/mol
MM C₄H₉MgBr = 161.32 g/mol
MM C₁₀H₂₂O = 158 g/mol
With this given MM, let's calculate the theorical yield of the product in each case:
a) 5 grams of aldehyde
In this case, let's calculate the moles of the given aldehyde:
moles = 5 / 100 = 0.05 moles
Assuming this is the limiting reagent, the moles of the aldehyde would be the same moles of the product, so:
moles aldehyde = moles product = 0.05 moles
So the theorical yield would be:
m product = 0.05 * 158
m = 7.9 g of C₁₀H₂₂Ob) 3 grams of butyl MgBr
In this case, we will do the same thing as before, and we will assume that this is limiting reagent so:
moles = 3 / 161.32 = 0.019 moles
m C₁₀H₂₂O = 0.019 * 158
m C₁₀H₂₂O = 3.002 gc) limiting reagent
Now this is easier, because if we have 5 g of aldehyde and 3 g of grignard reagent, we already has the moles of each with these masses, therefore, as both starting materials have a 1:1 mole ratio, we can see that the moles of the aldehyde are higher than the moles of grignard agent, therefore, the limiting reagent would be the butyl MgBr while the aldehyde would be the excess.
Limiting reagent = Butyl MgBrHope this helps
Ribosomes are packets of RNA and protein that play a crucial role in both animal and plant cells. Ribosomes aid in the process of
Answer: mutation
Explanation:
In a chemical reaction, where is the catalyst located
A. on the reactant side
B. on the product side
C. above the arrow
D. on both sides of the arrow
Answer:
A. on the reactant side
Explanation:
A catalyst will appear in the steps of a reaction mechanism, but it will not appear in the overall chemical reaction
What controls flowering in many
plants?
Answer:
All flowering is regulated by the integration of environmental cues into an internal sequence of processes. These processes regulate the ability of plant organs to produce and respond to an array of signals. The numerous regulatory switches permit precise control over the time of flowering.
Explanation:
How can you tell if glucose is present?
Answer:
The glucose urine test measures the amount of sugar (glucose) in a urine sample.
Convert 10 kilometers to miles
Answer:
6.21
Explanation:
Answer:
6.21371192 or ~ 6.21
Explanation:
10 kilometers is the same as 6.21371192 miles or ~ 6.21
All you need to do is divide the value of the kilometers by "1.609344" to convert it, into miles
Hope this helped!
Have a supercalifragilisticexpialidocious day!
23. How many different elements are in the compound sodium carbonate (Na2CO3)? *
a. 1
b. 3
C. 6
d.7
Na, C, and O so the answer is c. 3
3
(2 Points)
How many moles of CO2 is 6.9x1030 particles of CO2?
A. 1.1x10’moles
B. 1.1x10 moles
C.1.3x103 moles
D. 1.3x10’moles
Answer:
Explanation:
B
For the reaction CH4 + 2O2 = 2H2O + CO2
How many moles of water are produced from the combustion of 45.2 grams od methane (CH4)? Please show all work.
Answer:
(2H2O)=5.6mol
Explanation:
45.2g produce x mole of CH4
we are given the mass of methane
mass (CH4)=45.2g
molar mass (CH4) = 12+4 =16g/mol
Mole=mass
molar mass
mole=45.2
16
mole=2.8mol
therefore, if 45.2g produce 2.8mol as 1 mole of methane, the water produced is 2(2.8) we Are multiplying by 2 because the water is having 2 moles water mole is 5.6mol
Complete the following sentences to identify the process that ice, water, or water vapor may undergo if either the temperature or the pressure is increased.
Match the words in the left column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer.
FREEZE 1. If ice is heated at a constant pressure of 0.00512 atm, it will_____________.
CONDENSE 2. If ice is heated at a constant pressure of 1 atm, it will_____________.
MELT 3. If the pressure of water vapor is increased at a constant pressure of 100 degrees Celsius,it will____.
SUBLIME 4. If the pressure of water vapor is increased at a constant pressure of -50 degrees Celsius,it will__.
VAPORIZE
DEPOSIT
Answer:
Freeze
Condense
Melt
Sublime
Explanation:
Fill in the blank with the vocabulary term that fits the definition written. All your answers should be in lower case. You may need to submit the same answer for multiple blanks.
a. A reaction that results in the formation of water as an end product:__________
b. A reaction that requires water as a reactant: __________
c. A functional group on an amino acid that is polar and can become positively charged: _________
d. A functional group on an amino acid that is polar and can become negatively charged: _________
e. A functional group that is basic and part of the amino acid backbone: ___________
Answer:
1. Condensation.
2. Hydrolysis.
3. Amino group (Amine).
4. Carboxyl group.
5. Amino group.
Explanation:
a. A reaction that results in the formation of water as an end product: condensation.
b. A reaction that requires water as a reactant: hydrolysis.
c. A functional group on an amino acid that is polar and can become positively charged: amino group (amine).
d. A functional group on an amino acid that is polar and can become negatively charged: carboxyl group.
e. A functional group that is basic and part of the amino acid backbone: amino group (amine).
What is the total number of atoms of magnesium and phosphorus in 3Mg3(PO4)2?
I have the measles. Since measles is highly contagious, I should stay home from school today.
Answer:
ummmm ok good choice!!
Explanation:
Answer: Good choice
Explanation: You should probably stay home from school until you get better. Stay safe! ^^
The reaction Pb(NO3)2 (aq) + 2 Kl (aq) ---> Pbl2 (s) + 2 KNO3 (aq) is a(n)
What reaction is this?
Answer:
Double decomposition reaction
Explanation:
The reactants potassium iodide and lead nitrate react to from potassium nitrate and lead iodide, From this it is clear that, radicals are intercharged by the decomposition of reactants. Hence, it is a double decomposition reaction.
What are the coordinates of the midpoint between (3,-7) and (-5, 2)?
(-4,-4.5)
O (1, 2.5)
O (-2,-5)
(-1,-2.5)
The coordinates of the midpoint : (-1,-2.5)
Further explanationGiven
The coordinates of (3,-7) and (-5, 2)
Required
Midpoint
Solution
Can be formulated :
[tex]\tt midpoint=\dfrac{x_1+x_2}{2},\dfrac{y_1+y_2}{2}[/tex]
Input the value :
x₁=3
x₂=-5
y₁=-7
y₂=2
[tex]\tt midpoint=(\dfrac{3+(-5)}{2},\dfrac{-7+2}{2})\\\\midpoint=(\dfrac{-2}{2},\dfrac{-5}{2})\\\\midpoint=(-1,-2.5)[/tex]
The energy E of the electron in a hydrogen atom can be calculated from the Bohr formula:
E = -Ry/n2
In this equation Ry stands for the Rydberg energy, and n stands for the principal quantum number of the orbital that holds the electron. Calculate the wavelength of the line in the absorption line spectrum of hydrogen caused by the transition of the electron from an orbital with n = 2 to an orbital with n = 8.
Answer:
3.89002 × 10 ⁻⁷m = 389.002nm.
Explanation:
Without mincing words let's dive straight into the solution to the problem above. To calculate the wavelength of the line in the absorption line spectrum of hydrogen caused by the transition of the electron from an orbital with n = 2 to an orbital with n = 8, there is the need to make use of the change in energy equation.
The change in energy = 2.18 × 10⁻¹⁸ [ 1/2² - 1/8²] = 2.18 × 10⁻¹⁸ × [0.25 - 0.015625] = 2.18 × 10⁻¹⁸ × 0.234375 = 5.11 × 10⁻¹⁹.
Therefore, the wavelength = plank's constant × speed of light/ change in energy = 6.626× 10⁻³⁴ × 3 × 10⁸/ 5.11 × 10⁻¹⁹ = 1.9878 × 10⁻²⁵/ 5.11 × 10⁻¹⁹ = 0.389002 × 10⁻⁶ = 3.89002 × 10 ⁻⁷m = 389.002nm.
The chemical formula of bromomethane is BrCH3. Which correctly describes the number of atoms of each element in bromomethane?
The number of atoms of each element :
C : 1 atom
H : 3 atoms
Br = 1 atom
Further explanationGiven
Bromomethane-CH₃Br
Required
The number of atoms
Solution
The empirical formula is the smallest comparison of atoms of compound forming elements.
A molecular formula is a formula that shows the number of atomic elements that make up a compound.
The number of atoms in a compound is generally indicated as a subscript after the atom
C : 1 atom
H : 3 atoms
Br = 1 atom
Total 5 atoms
Read the descriptions below of two substances and an experiment on each. Decide whether the result of the experiment tells you the substance is a pure substance or a mixture, if you can.
• Sample A is a solid yellow cube with a total mass of 50.0 g. The cube is ground to a fine orange powder and added to a 500 ml beaker full of water. The beaker is stirred vigorously. Some of orange powder settles to the bottom of the beaker, and some rises to the top and floats on the water. When the powder at both the bottom and the top of the beaker is filtered out, dried, and weighed, the total mass is measured to be 50.1 g.
• Sample B is 100 mL of a clear liquid. The density of the liquid is measured, and turns out to be 0.77 g/mL. The liquid is then heated in a flask until it boils. The vapor that rises off the bolling liquid is collected for 10 minutes and cooled until it condenses into a separate beaker. The density of the liquid that remains in the flask is then measured, and turns out to be 1.04 g/mL.
Required:
Is sample A made from a pure substance or a mixture?
Answer:
Sample A is a mixture
Sample B is a mixture
Explanation:
If we look at sample A, we can easily notice that the sample powder was found to float while some of it settled below. This means that the sample is not entirely homogeneous. A homogeneous sample always constitutes a single phase in solution. Also, the dried mass yields 50.1 g while only 50.0 g of the yellow cube was ground and dissolved. This shows that the original cube is not pure. A sample that is not entirely homogeneous is not pure.
Secondly, the fact that the density of liquid that remains in the flask is different from the density of the sample initially measured indicates that the original sample B is a mixture of substances.
Besides plants, do other organism get their energy directly from the Sun?
yes or no
yes they doExplanation:
Answer:
yes they do get there energy From the sun everything does
A mixture of helium and neon gas is expanded from a volume of 47.0 L to a volume of 93.0 L, while the pressure is heid constant at 97.0 atm. Calculate the work done on the gas mixture.
Answer:
W = - 452.112 kJ
Explanation:
given data
initial volume v1 = 47 L
final volume v2 = 93 L
external pressure = 97 atm
solution
we get here work done that is express as
W = - P (V2 - V1) .......................1
put here value and we get
as V2 - V1 = 93 L - 47 L = 46 L
1 atm = 101325 pascal
41 atm = 9828525 pascal
46 L = 0.046 m³
W = - 9828525 pascal × 0.046 m³ = 452112.15 J ( 1KJ = 1000 J )
so
W = - 452.112 kJ
Identify the element of Period 2 which has the following successive ionization energies in kJ mol:
IE1,1314 IE2,3389 IE3,5398 IE4, 7471
IE5, 100992 IE6,13329 IE,71345 IE8,84087
a. Li
b. B
c.O
d. Ne
e. None of these
Answer:
c.O
Explanation:
From the periodic table:
Ionization energy tends to increase from IE6 → IE7 drastically at 13329 to 71345. Hence, from this process, we can infer that the removal of electrons takes place from the inner shell which in turn has a higher affinity for the nucleus. This must be oxygen because oxygen contains 6 valence electrons. The removal of this valence electron after the sixth ionization results in the achievement of a stable nearest Noble gas configuration. Hence, the rapid change in the ionization is obvious from IE6 to IE7.
Thus, the element that relates to the IE trend is oxygen.
rearrange the expression in to quadratic form
0.20=²÷45−
......what is that 2 after =
Does the acid rain make a new substance? yes or no
Answer:
yes
Explanation:
the answer is yes
What is the charge for molybdenum?
