Answer:
C)peer review
Explanation:
Peer review involves the evaluation of scientific research work by other professionals working in the same field. It is one of the stages a manuscript passes through before it is published in any reputable journal.
Peer review is important because it ensures that only high quality and original scientific research is published for the consumption of other professionals in the same field.
To find the density of an irregular object, what method should be used?
Answer:
You can find the volume of an irregular object by immersing it in water in a beaker or other container with volume markings, and by seeing how much the level goes up. You can use this relation backwards too -- if you know what material an object is made of, you can look up its density in a book. hOPE THIS HELPS! =)
A neutral atom has an equal number of positive and negative charges. If a neutral fluorine atom has 9 protons and 10 neutrons, how many electrons will it have?
The number of electrons should be 9.
Given that,
If a neutral fluorine atom has 9 protons and 10 neutronsCalculation of a number of electrons:
= Number of protons = Number of electrons
9 = Number of electrons
Therefore,
Number of electrons = 9
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Convert 732.0 mmHg to atm
Answer:
The answer is
0.95 atmExplanation:
To solve the question we use the following conversion
That's
1 mmHg [tex]\cong[/tex] 0.0013 atm
So we have
If 1 mmHg [tex]\cong[/tex] 0.0013 atm
Then 732 mmHg will be
732 × 0.0013 atm
We have the final answer as
0.95 atmHope this helps you
what do elements in block have in common?
Answer:
The d-block elements are all metals and most have one or more chemically active d-orbital electrons. Because there is a relatively small difference in the energy of the different d-orbital electrons, the number of electrons participating in chemical bonding can vary.
Answer:
the d block element are all metals and most have one ore more chemically active d-orbital electrons.because there is a realatively small differernce in the energy of the different d-orbital electrons ,the number ofelectrons participating in chemical bonding can vary.1) Two clear solutions are placed in separate beakers. The first solution has a pH = 4, and the pH of the second solution is unknown. If the two solutions are mixed and the resulting solution has a pH = 7, describe the second solution.
Answer:
pH = 10
Explanation:
pH = -log [H⁺]
A solution that is pH = 4 has a [H⁺] = 1x10⁻⁴M
As the mixture of the two solutions is pH = 7 (Neutral). The second solution must contain the exact amount of OH⁻ to neutralize the H⁺ of the first solution. That is [OH⁻] 1x10⁻⁴
And as pOH = -log [OH⁻]
pOH = -log 1x10⁻⁴
pOH = 4
Also, pH = 14-pOH
pH of the second solution must be:
14 - 4
pH = 10An atom has 17 protons And a mass number of 35 what is the name of this isotope in isotopic notation
Answer:
dsadsaddsadsadsadsdsdasdsa
Explanation:dsadasdasdasdasda
Explain the similiarities and differences between combustion and food digestion?
Answer:
Digestion is not an example of combustion. Digestion is an endothermic process where energy is utilized to break down the complex food molecules into simple forms. In a combustion reaction carbon dioxide,water,energy and some by products are released.
Explanation:
if I took two electrons (negatively charged particles) and tried to put them near each other, what would happen?
Which two characteristics affect ocean water’s temperature?
salinity and waves?
location and depth?
mass and salinity ?
waves and location??
Answer:
The correct answer is location and depth
Explanation:
Correct on edge 2020
Answer:
B.) Location and Depth
Which state of matter can change both shape and volume?
O solid
O liquid
O gas
Answer:
Gas
Explanation:
Gasses will fill the shape whatever container they are in and can be compressed down into smaller volumes quite easily.
Solids have a definite shape and volume
liquids have an indefinite shape but a definite volume
What type of compounds are found in living things; always have carbon within them? (need answer quick)
Answer:
helping hand
Explanation:
dddeedehhhwuww
Mercury has a density of
13.55 g/mL .What would be the volume of a 122 g sample?
Answer:
V = 9.0037
Explanation:
V = M/D
V = 122/13.55
V = 9.0037
Solve the following, observing significant figure
rules
1 355.24 g -
0.954 g
Answer:
355.24 - 0.954 = 354.29
Sig Figs = 5
Decimals = 2
Scientific Notation ;
[tex]3.5429 \times 10^2[/tex]
Explanation:
Life has existed on Earth for about 3.8 billion years despite gradual and sudden environmental changes. How do the scientific factors of sustainability help explain how life has continued to survive and evolve?
Answer:
As we all are aware that life on Earth is existed due to several environmental changes and there are several scientific factors of sustainability that support the survival and evolution of life on Earth.
Scientific factors of sustainability include solar energy, chemical cycle, and biodiversity that supported life on Earth. solar energy helps all organism and especially producers to gain energy and store the energy which further used in chemical cycles of transferring energy to other trophic levels.
Chemical cycle also involves the interaction of biotic and abiotic envrionment with each other that leads to environmental changes as well as organisms adapt themselves accordingly.
Biodiversity maintains the balance in the ecosystem and prevent dominancy of one organism otherwise it can lead to scarcity and organism would not be able to survive. Variation in biodiversity due to random mating in the same species leads to evolution and produces new species of organisms.
Hence, scientific factors of sustainability play major role in survival and evolution of life on the Earth.
which product of petroleum is normally used as fuel in cars and light vehicles
Answer:
mostly gasoline in cars nowadays
Catalase is an enzyme that speeds up the breakdown of hydrogen peroxide in cells. During this reaction oxygen is given off. A scientist designs an experiment to determine how much oxygen is given off when varying concentrations of catalase are used. Identify the independent variable A the concentration of the catalase B the result of the reaction C Type of proxide D the shape of the container
Answer:
The correct option is A
Explanation:
An independent variable is a variable that is intentionally altered (directly or indirectly) and is not dependent on another variable in the course of an experiment. Unlike the independent variable, the dependent variable depends or is presumed to depend on the altered independent variables.
From the explanation above, it can be deduced that the concentration of the catalase is the independent variable as it was intentionally altered (by using different concentrations) in the course of the experiment. The amount of oxygen given off is the dependent variable here
The periodic table _____. is arranged by atomic mass is arranged by number of protons was developed by early alchemists is divided into vertical periods and horizontal groups
Is the range by number of protons sorry if I'm wrong
Answer:
Is the range by number of protons sorry if I'm wrong
Explanation:
please solve this problem
Explanation:
ans b hcl and ccl4
both these compounds are formed by sharing of electrons......
The density of gold is 19.3 g/cm3 and the density of lead is 11.4 g/cm3. If you have 5 grams of gold and 5 grams of lead, which will have the greater volume?
Given :
The density of gold is [tex]19.3 \ g/cm^3[/tex] and the density of lead is [tex]11.4\ g/cm^3[/tex] respectively .
To Find :
Which have greater volume .
Solution :
We know , density is given by :
[tex]\rho=\dfrac{mass}{volume}[/tex]
Now , volume of 5 gm gold .
[tex]Volume=\dfrac{mass}{\rho}\\\\Volume =\dfrac{5}{19.3}\ cm^3\\\\Volume =0.26\ cm^3[/tex]
Also , volume of 5 gm lead .
[tex]Volume=\dfrac{mass}{\rho}\\\\Volume =\dfrac{5}{11.4}\ cm^3\\\\Volume =0.44\ cm^3[/tex]
Therefore , volume of lead will be greater than gold.
Hence , this is the required solution .
What is the solution to the problem rounded to the correct number of significant figures?
12.77 + 0.8 = ?
Answer:
13.57 approximately 14
calculate and compare the chemical energy of coal to its gravitational potential energy. Burning 1 kg of coal releases about 3 million joules of energy. if you could use all of the chemical energy to lift another kilogram of coal, how could you lift it?
Answer:
Explanation:
chemical energy of 1 kg coal is 3 million joules .
If this energy is used to lift one kg of coal , let height attained be h
chemical energy = gravitational energy of 1 kg of coal
3 x 10⁶ = m g h = 1 x 10 x h
h = 3 x 10⁵ m
= 300 x 10³ m
= 300 km .
i kg coal can be lifted by height of 300 km .
Do you think it is possible to be an environmentalist without also being an environmental activist? Why or why not?
Lead has a density of 11.3 g/mL. If you have 105 grams of lead,
what is the volume in milliliters?
Remember to select an answer with the correct number of
significant figures.
Answer:
Volume = 9.29 mLExplanation:
Density of a substance can be found by using the formula
[tex]Density( \rho) = \frac{mass}{volume} [/tex]
From the question
Density = 11.3 g/mL
mass = 105 g
Substitute the values into the above formula and solve for the volume
That's
[tex]11.3 = \frac{105}{v} [/tex]
Cross multiply
11.3v = 105
Divide both sides by 11.3
[tex]v = \frac{105}{11.3} [/tex]
v = 9.29203
We have the final answer as
Volume = 9.29 mLHope this helps you
what evidence is there that all state of matter have mass
Answer:
Matter is the "stuff" that makes up the universe everything that takes up space and has mass is matter.
All matter is made up of atoms, which are in turn made up of protons, neutrons and electrons
Matter itself must have mass irrespective of its state.
Matter is anything that has mass and occupy space. Matter exists in three states;
Solid Liquid GasIn all these states of matter, matter is made up of "stuff". For instance, if a solid, liquid or gas is introduced into an empty bag attached to a scale, the bag will move downwards and the scale will record an increase in mass.
This shows that matter in solid, liquid or gaseous state all have mass.
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cyclohexene from aminobenzene conversion
Answer:
By dehydrogenation of cyclohexane you may get Benzene as a product. We may use noble metals(Au, Ag, Pt etc.) to dehydration of cyclohexane. Consider following reaction which gives an idea about reaction.
Explanation:
I think it is the correct answer
i have read this in one of the book
What is the mass of the object?
Answer:
37.3
263.5
Explanation:
The scale measures hundreds of units, tens of units, units, and parts of units (1 decimal place.
Scale 1
Hundreds 0 * 100 = 0
Tens: 3 * 10 = 30
Units: 7 * 1 = 7
1/10 unit = 3* 0.1 = 0.3
Total 30 + 7 + 0.3 = 37.3
Scale 2
Hundreds 2 * 100 = 200
Tens: 6 * 10 = 60
Units: 3 * 1 = 3
1/10 unit = 5* 0.1 = 0.5
Total = 200 + 60 + 3 + 0.5 = 263.5
How many carbon Atoms does NaCI2 have
Answer:
Molecular formula is CaCl2 i.e. 1 atom of Ca and 2 atoms of Cl . Hence, molecular weight = 1 x 40 + 2 x 35.5 = 40 + 71 = 111 g / mol . But if you look at the weight online, it says 110.98 g / mol , which is close to 111
Explanation:
Hope this helped :)
Which of the following combustion reactions is balanced correctly?
O A. C5H12 + 402 → 5C02 + 3H20
O B. C5H12 + 402 → CO2 + 6H20
O C. C5H12 + 802 → 5002 + 6H20
O D. C5H12 + 5.502 → 5CO2 + H20
Answer:
c
Explanation:
The chemical equation which is balanced is C₅H₁₂+ 8 O₂ [tex]\rightarrow[/tex] 5 CO₂ + 6 H₂O which is a combustion reaction.
What is chemical equation?
Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
Learn more about chemical equation,here:
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A climber trekked to the top of Mount Everest, elevation 29,035 ft. From a starting point of 24976 ft. In a time of 15 hr, 35 min. Determine the average rate of climb in:(a) miles per minute
Answer:
The average rate of climb in miles per minute is 8.2x10⁻⁴ miles/min.
Explanation:
The average rate can be calculated as follows:
[tex] \overline{v} = \frac{y_{f} - y_{0}}{t_{f} - t_{0}} [/tex]
Where:
[tex]y_{0}[/tex]: is the initial height = 24976 ft
[tex]y_{f}[/tex]: is the final height = 29035 ft
[tex]t_{0}[/tex]: is the initial time = 0
[tex]t_{f}[/tex]: is the final time = 15 hr, 35 min = 935 min
Then, the average rate of climb in miles per minute is:
[tex] \overline{v} = \frac{y_{f} - y_{0}}{t_{f} - t_{0}} [/tex]
[tex] \overline{v} = \frac{29035 ft - 24976 ft}{935 min - 0} = 4.34 \frac{ft}{min}*\frac{1 mile}{5280 ft} = 8.2 \cdot 10^{-4} miles/min [/tex]
Therefore, the average rate of climb in miles per minute is 8.2x10⁻⁴ miles/min.
I hope it helps you!
what is chemical safety?