Explanation: B.
Bees pollinate in order to sweeten their seed
Answer:
A
Explanation:
Bees make excellent pollinators because most of their lives is spent collecting pollen which acts as a protein to feed their offspring
Brainliest and a free hug :) thank you!!
The mass in a chemical reaction is found in
the energy produced by the reaction
the explosion produced by the chemical reaction
the atoms involved in the chemical reaction
the bonds involved in the chemical reaction
Answer:atoms involved in reaction. Mass remains same in reaction
Explanation: hug would be fine!
In the following molecules, the primary intermolecular attractive force is
Answer:
Dipole-dipole
Explanation:
Balance the following equation
_MgF2 + _Li2CO3 -> _MgCO3 + _LiF
Answer:
1 MgF2 + 1 Li2CO3 --> 1 MgCO3 + 2 LiF
Explanation:
Which types of chemical reactions are
considered opposites of one another?
Answer:
Hi
Explanation:
Decomposition reactions are really the opposite of combination reactions. In decomposition reactions, a single compound breaks down into two or more simpler substances (elements and/or compounds).
Explanation:
Decomposition chemical reactions
Decomposition reactions are really the opposite of combination reactions. In decomposition reactions, a single compound breaks down into two or more simpler substances (elements and/or compounds).
The decomposition of water into hydrogen and oxygen gases
and the decomposition of hydrogen peroxide t form oxygen gas and water
are examples of decomposition reactions.
Please help me ASAP I’m almost done.
Answer:
i think the answer is c
Explanation:
sorry if im wrong i am most likely wrong but ye
1,670,000,000 in
scientific notation pleaseeee
Answer:
1.67 × 10^9
Explanation:
Which observation is true about the result of mixing kernel corn and oil?
A. The kernel dissolved in the oil.
B. The kernel corn floated above the oil
C. The kernel corn did not dissolve completely.
D. The kernel corn settled down at the bottom of the glass.
Answer:
A.The kernel dissolved in the oil.
Write the formula for Zn+2 (SO4)-2
Answer:
Zn2 + SO4 = Zn2(SO4)2
Explanation:
A buoy bobs up and down in the ocean. The waves have a wavelength of
2.5 m, and they pass the buoy at a speed of 4.0 m/s. What is the frequency
of the waves?
A. 1.6 Hz
B. 10 Hz
C. 6.5 Hz
D. 1.5 Hz
Answer:
c
Explanation:
There are 4 mg of lead present in 2000 g of a water sample. What is the
concentration of lead in m?
Answer: 130 ppm Pb
Explanation:
We use parts per million to express the concentrations of solutions that contain very, very small amounts, often called trace amounts, of a given solute.
More specifically, a solution's concentration in parts per millions tells you the number of parts of solute present for every
10
6
=
1
,
000
,
000
parts of solution. You can thus say that a
1 ppm
solution will contain exactly
1 g
of solute for every
10
6
g
of solution.
In your case, you know that you have
38
mg Pb
⋅
1 g
10
3
mg
=
3.8
⋅
10
−
2
.
g Pb
in exactly
300.0 g
=
3.000
⋅
10
2
.
g solution
This means that you can use this known composition as a conversion factor to scale up the mass of the solution to
10
6
g
10
6
g solution
⋅
3.8
⋅
10
−
2
.
g Pb
3.000
⋅
10
2
g solution
=
130 g Pb
Since this represents the mass of lead present in exactly
10
6
g
of solution, you can say that the solution has a concentration of
concentration
ppm
=
130 ppm Pb
−−−−−−−−−−−−−−−−−−−−−−−−−−−−
The answer is rounded to two sig figs, the number of sig figs you have for the mass of lead present in the sample.
28. A runner completes a 10 km run in about 30 minutes. What was the runner's average
speed in km/h? Hint: (60 minutes = 1 hr)
a. 10 km/hr
c. 20 km/hr
b. 15 km/hr
d. 30 km/hr
Answer:
20 km/h
Explanation:
Speed = distance ÷ time
Speed = 10 ÷ 0.5 hours
Speed = 20 km/hr
When you add an inert gas, the reaction
Answer: When an inert gas is added to the system in equilibrium at constant pressure, then the total volume will increase.
Explanation:
Which statement about elements is true?
All substances are made up of elements.
There are approximately 50 elements.
An element is made up of different types of atoms.
Most elements are nonmetal.

Answer:
first one is right.
there are 117 elements, so 2nd option is wrong.
elements are made up of one type of atoms, so 3rd is also wrong.
most elements are metal. so 3rd is wrong
Mass = 22g Volume = 2cm3 What is the Density?
Answer:
11g/cm^3
Explanation:
The density of a substance can be found By
density= Mass/volume
From the question
mass = 22 g
volume = 2 cm³
22/2=11
We have the final answer as
11 g/cm³
Answer:
11g/cm^3
Explanation:
It is because the constant formula density is
Density=Mass/ Volume.
Therefore we have
Density=22g/2cm^3
Which is = 11g/cm^3
What does thermal energy refer to?
A. The chemical energy in reactions
B. The heat transferred between objects
C. The kinetic energy of particles within a system
D. The energy obtained from the sun
SUBMIT
Answer:
c
Explanation:
Thermal Energy has been the type of energy that refers to the kinetic energy of particles contained in a system. Hence, the correct option is (C).
What is thermal energy?
Thermal energy is the energy contained within a system as a result of its temperature. Thermodynamics, a branch of chemistry, states how heat is transmitted through multiple systems and how work is done in the process by the virtue of the first law of thermodynamics.
The thermal energy speeds the movement and collision of the particles present within the system. It is found in electric heat, geothermal, coals, etc. It is due to the kinetic energy that allows the movement of the particles.
Therefore, option C. the kinetic energy contained in the particles results in thermal energy.
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Certain race cars use methanol (CH 3 OH) as fuel. The combustion of 9.8 moles of methanol produces what mass of water?
The combustion of 9.8 moles of methanol will produce 352.8 grams of water.
Stoichiometric calculationFirst, let us look at the balanced equation of combustion of methanol:
[tex]2CH_3OH(l)+3O_2(g)-- > 2CO_2(g)+4H_2O(l)[/tex]
The ratio of number of moles of methanol burned and that of water produced is 1:2.
Thus, 9.8 moles of methanol will produce 19.6 moles of water.
Mass of 19.6 moles water = 19.6 x 18 = 352.8 grams
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Question 4 (2 points)
Manganese-56 decays by beta emission and has a half life of 2.6 hours. If a sample
is analyzed and found to contain 6.25% parent isotopes and 93.75% daughter
isotopes, what must the age of the sample be?
Answer:
10.4 hours
Explanation:
Now from;
0.693/t1/2 = 2.303/t log (No/N)
t1/2= half life of the radioactive isotope
t = age of the radioactive isotope
No= Original amount of radioactive isotope
N= amount of radioactive isotope left after time t
Substituting values;
N = 0.0625No
0.693/2.6 = 2.303/t log (No/0.0625No)
0.693/2.6 = 2.303/t log (1/0.0625)
0.267 = 2.303/t * log 16
0.267 = 2.773/t
t = 2.773/0.267
t = 10.4 hours
How are organisms classified as Eukarya different from organisms classified as Archaea and Bacteria?
A)They are all multicellular.
B)They all produce their own food.
C) They all reproduce sexually.
D) They all have membrane-bound nuclei
Answer: D
Explanation: The Eukarya differ from the Archea and Bacteria in that their cells are eukaryotic, meaning they contain a membrane enclosed nucleus and other membrane enclosed organelles.
Eukarya is different from organisms classified as Archaea and Bacteria because Eukarya have membrane-bound nuclei. Therefore, option (D) is correct.
How does the classification of Eukarya differ from Archaea?The type of cell of the organism can be classified into three domains. First is the bacteria which have no nucleus present in cells. Then Archaea have no nucleus in the cells but they have a different cell wall than bacteria. Then Eukarya have a nucleus in them.
The domains of Archaea and Bacteria are both composed entirely of small, single-celled organisms but they also have differences. All are composed of prokaryotic cells, which are nucleus-less cells. T
All the cells in the Eukarya domain contain their genetic material or DNA within the nucleus. Four classes make up the Eukarya domain: Plantae, Fungi, Animalia, and Protista.
Therefore, the domain of the Eukarya is different from organisms classified as Archaea and Bacteria as Eukarya have membrane-bound nuclei.
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Which elements are
considered "Noble Metals"?
Answer:
ruthenium (Ru), rhodium (Rh), palladium (Pd), osmium (Os), iridium (Ir), platinum (Pt), gold (Au), silver (Ag).
Explanation:
The term "Noble Metals" traditionally refers to a group of metals that are resistant to corrosion and oxidation in moist or chemically aggressive environments. The elements commonly considered noble metals are Gold, Platinum, Palladium, Palladium, etc.
Gold is perhaps the most well-known noble metal. It is highly resistant to corrosion and oxidation. Platinum is another widely recognized noble metal. It is extremely resistant to corrosion and has a high melting point.
Palladium is a noble metal that exhibits excellent chemical stability and resistance to corrosion.
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You need to make 500 mL of a 3.40 M solution of sodium chloride. The only available solution is 1.5 M. Determine how to make the needed dilution.
Answer: (1.5 M) V1 = (3.40 M) (500mL)
(multiply 3.40M x 500mL) V1 = 1700 mL
1700 mL of the 1.5 M NaCl + 1200mL of water.
Explanation:
a sample of gas at 25.0 c has a volume of 11.0 L and exerts a pressure of 660.0 mmHg. how many moles of gas are in the sample
Answer: 0.391
Explanation:
Ideal gas law is valid only for ideal gas not for vanderwaal gas. Therefore, 0.38moles of gas are in the sample. Ideal gas is a hypothetical gas.
What is ideal gas equation?Ideal gas equation is the mathematical expression that relates pressure volume and temperature. There is no force of attraction between the particles.
Mathematically the relation between Pressure, volume and temperature can be given as
PV=nRT
where,
P = pressure of gas sample = 660.0mmHg=0.86atm
V= volume of gas sample =11.0 L
n =number of moles of gas sample=?
T =temperature of gas =298K
R = Gas constant = 0.0821 L.atm/K.mol
Substituting all the given values, we get
0.86atm×11.0 L =n× 0.0821×298
On calculation we get
9.46=n×24.4
number of moles of sample=0.38moles
Therefore, 0.38moles of gas are in the sample.
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Collision theory states that when two molecules collide with each other with sufficient energy and hit in the proper orientation, a
bond is formed. Which action will increase the rate of reaction in a closed container?
A)
adding an inert gas
B)
expand the volume
C)
increase the temperature
D
decrease the concentration
Answer:
c increase the temperature
Explanation:
Raul needs to ensure that when users enter an order into the tblOrders, the shipping date is at least two days after the order date on the data entry. Which option should he use?
Answer:
Input Mask
Explanation:
In this scenario, the best tool for Raul to use would be an Input Mask. When dealing with Microsoft Access or any other database tool, Input Masks are a great way of validating data inputs so that they always match the desired format. In this case, Raul would need to use input mask and apply the desired format while comparing it to the order date, therefore, making sure that it is always a minimum of 2 days after before it is accepted as a valid entry in the database.
help cococococo cococococo doing this for the points or whatever it is cococo
Answer:
what is cocococococo?
Explanation:
isnt it like a plant for choclate?
Answer:
hhhhhhhh
Explanation:
How is it possible for scientists to know the composition of stars without traveling to the star?
Answer:
One of the most common methods used today to determine the composition of stars is spectroscopy.
Explanation:
Spectroscopy is the study of the interaction between matter and electromagnetic radiation as a function of the wavelength or frequency of the radiation.
The recipe for Bananas Foster requires 35g of ethanol to be added to the pan. The ethanol starts at room temperature (25°C) and is heated to its boiling point of 78°C. How many Joules of energy are transferred from the stove burner to the ethanol to create this temperature change? Your answer should have the correct number of significant figures. Show all work.
Given: The specific heat of ethanol is 2.46 J/g°C.
Answer:
To calculate the amount of heat released we have equation, use the equation Q = mc ΔT,
where
m= 35g
c= 2.46 J/g°C
ΔT=T2-T1 = 78-25= 53°C
now Q = mcΔT
Q = 35×2.46×53
Q = 4563.3 joule
Conclusion 4563.3 Joules of energy are transferred from the stove burner to the ethanol to create this temperature change!
If you see a large “H” on the weather map, what type of weather can you expect there?
Answer:
High pressure.
Explanation:
The weather should have clear skies, if it is a Large "L" it would be could be stormy.
Hope this helps! have a great day!
What is true of an Arrhenius base?
O A. An Arrhenius base produces OH" ions.
O B. An Arrhenius base accepts OH ions.
O c. An Arrhenius base accepts H+ ions.
O D. An Arrhenius base produces H+ ions.
Answer:
produce OH-
Explanation:
Which of the following statements is not true? a. Water is polar. b. Water stabilizes temperature. c. Water is essential for life. d. Water is the most abundant atom in Earth’s atmosphere.
Answer: d. Water is the most abundant atom in Earth’s atmosphere.
Explanation:
Water percentage in the atmosphere is 0.001 percent only as it not the major reservoir or source of water. The water is available in the atmosphere in the form of water vapors. These water vapors when aggregate and their concentration becomes high they fall down as rain on earth so the rain is collected in water reservoirs like oceans, rivers, lakes, ponds, aquifers, and other sources of water, which are the components of hydrosphere on earth. So, hydrosphere is most abundant in water. Moreover, water is not an atom instead it is the molecule formed by the combination of two molecules of hydrogen and one molecule of oxygen.
What would it mean if a forecaster claimed, “There will be east winds of 25 to 30 mph."
Answer: It would mean that there is wind originating from the east and blowing west at 25 - 30 mph
