Answer: B) 2 (as indicated by electron distribution shown), but taking into account the real properties of this element, 4,7,8 also occur (see below).
Explanation:
This is the electron complement/atomic number of ruthenium, which actually has the structure [Kr] 5s1 4d7
Nevertheless, Ru does not form Ru(I) compounds and few Ru(II) compounds (RuCl2, RuBr2, RuI2). It also forms Ru(III)Cl3 and a larger number of Ru(IV) compounds, e.g. RuO2, RuS2. It also forms RuO4
Which actions will change an object’s weight, but not it’s mass?
A. Breaking the object
B. Compressing the object
C. Immersing the object in water
D. Placing the object on a different planet
PLZ HELP
Answer:
D
Explanation:
The weight of an object will change if the object is brought farther away from Earth, or placed on a different planet since the force of gravity on the object will change. However, the mass of the object will remain the same regardless of whether the object is on Earth, in outer space, or on the Moon. hope this helps have a good day :)
Which of the following is a characteristic science?
Answer:
what are the answer choices?
Explanation:
Answer:
The Answer is A
Explanation:
It asks questions about the natural world.
Hope this helps!!
Atoms are the same thing as molecules
Question 2 options:
True
False
How many joules of heat are absorbed when 10.00 grams of water is completely vaporized at its boiling
point?
Answer:158.2 J
Explanation: Use your equations and fill in
When a strong acid and a strong base react completely, what is the resulting pH? (numerical value only)
Answer:
i think the answer is 7
Explanation:
Hope this is it
Ammonium phosphate is an important ingredient in many fertilizers. It can be made by reacting phosphoric acid with ammonia . What mass of ammonium phosphate is produced by the reaction of of phosphoric acid
Answer:
4.3 g
Explanation:
Ammonium phosphate is an important ingredient in many fertilizers. It can be made by reacting phosphoric acid with ammonia . What mass of ammonium phosphate is produced by the reaction of 2.8 g of phosphoric acid?
Step 1: Write the balanced equation
3 NH₃ + H₃PO₄ ⇒ (NH₄)₃PO₄
Step 2: Calculate the moles corresponding to 2.8 g of H₃PO₄
The molar mass of H₃PO₄ is 97.99 g/mol.
2.8 g × 1 mol/97.99 g = 0.029 mol
Step 3: Calculate the moles of (NH₄)₃PO₄ produced from 0.029 moles of H₃PO₄
The molar ratio of H₃PO₄ to (NH₄)₃PO₄ is 1:1. The moles of (NH₄)₃PO₄ produced are 1/1 × 0.029 mol = 0.029 mol.
Step 4: Calculate the mass corresponding to 0.029 moles of (NH₄)₃PO₄
The molar mass of (NH₄)₃PO₄ is 149.09 g/mol.
0.029 mol × 149.09 g/mol = 4.3 g
The cold water from deep in the ocean contains
Answer:
water... OH AND FISH
Explanation:
Answer:
Deep ocean water makes up about 90% of the volume of the oceans. Deep ocean water has a very uniform temperature, around 0-3 °C, and a salinity of about 3.5% or as oceanographers state as 35 ppt (parts per thousand).
Explanation:
Why is the earth atmosphere located above earth crust
Answer:
The atmosphere is the thin envelope of gas molecules surrounding the Earth; it is held down by Earth's gravitational pull. The atmosphere is concentrated at the Earth's surface and rapidly thins as you move upward, blending with space at about 100 miles above sea level
Explanation: science
Answer:
Öncelikle burda soru Why is the earth atmosphere located above earth crust yani Türkçe olarak Dünya atmosferi neden yer kabuğunun üzerinde yer alıyor diyor
The term “periodic” helps identify _______ that occur in the table, like electronegativity or atomic radii.
A. Atomic mass
B. Families
C. Patterns
If u can answer this thank you so much
Answer: ITS C OR B I THINK BUT I HAVE A FEELING ITS ONE OF THOSE
Explanation:
IM SO SORRY IF ITS WRONG KSDBDZDH
Answer:
C. Patterns
Explanation:
I got it right on usatestprep
The Xs show the location of beanbags a student tossed at a target. The
student was aiming for the center circle. Which words best describe the
student's results?
A. Low precision, low accuracy
O B. High precision, low accuracy
O C. High precision, high accuracy
O D. Low precision, high accuracy
Answer:
It is D low precision, high accuracy
Explanation:
I got it correct
The Xs show the location of beanbags a student tossed at a target. The student was aiming for the center circle. Low precision, high accuracy best describe the student's results. Therefore, option D is correct.
What is precision ?There are two ways to assess observational error: accuracy and precision. Precision measures how closely two measurements are to one another, whereas accuracy measures how close a group of measurements is to its actual value. In other words, precision is a measure of statistical variability and a description of random errors.
The proximity of two or more measurements to one another is referred to as precision. Using the aforementioned example, your measurement is extremely accurate if you weigh a certain substance five times and obtain 3.2 kg each time. Accuracy is not necessary for precision.
Regardless of whether or whether two or more measurements are correct, precision is described as "the property of being exact" and relates to how close two or more measurements are to one another.
Thus, option D is correct.
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A chemist adds of a M calcium sulfate solution to a reaction flask. Calculate the mass in grams of calcium sulfate the chemist has added to the flask
Answer:
1.23 g
Explanation:
A chemist adds 1.55 L of a 0.00582 M calcium sulfate solution to a reaction flask. Calculate the mass in grams of calcium sulfate the chemist has added to the flask.
Step 1: Given data
Volume of the solution (V): 1.55 LMolar concentration of the solution (C): 0.00582 M (0.00582 mol/L)Step 2: Calculate the moles (n) of calcium sulfate added
We will use the following expression.
n = C × V
n = 0.00582 mol/L × 1.55 L
n = 0.00902 mol
Step 3: Calculate the mass corresponding to 0.00902 moles of calcium sulfate
The molar mass of calcium sulfate is 136.14 g/mol.
0.00902 mol × 136.14 g/mol = 1.23 g
A sheet of aluminum foil has a volume of 0.555 cm3. If the foil measures 10.0 cm by 10.0 cm, what is the thickness of the foil?
Answer: B) 0.005 55 cm
Hope you have a blessed day!
A cupcake recipe designed to produce 18 cupcakes calls for 260 grams of
flour. Determine the quantity of flour that would be required to make 22
cupcakes. (Round the final answer to four decimal place.)
Answer:
317.7778 g
Explanation:
Given data:
Flour required for 18 cup cakes = 260 g
Flour required for 22 cup cakes = ?
Solution:
We will calculate the flour required for 1 cup cake.
260 g /18 = 14.4444 g
Fluor required for 22 cupcakes,
22× 14.4444 g = 317.7778 g
In short,
22 cupcake/18 cup cake×260 g = 317.7778 g
A sample of carbon dioxide gas that has a volume of 14.6 L at STP contains how many
mol(s) of gas (to three significant figures).
Answer:
n = 0.651 mol
Explanation:
Given data:
Volume of CO₂ = 14.6 L
Temperature = standard = 273.15 K
Pressure = standard = 1 atm
Number of moles of CO₂ = ?
Solution:
The given problem will be solve by using general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
by putting values,
1 atm × 14.6 L = n × 0.0821 atm.L/ mol.K × 273.15 K
14.6 L. atm = n × 22.43atm.L/ mol
n = 0.651 mol
Name the functional Group in
CH₃CO₂H
Answer:
•Name the Functional Group in CH₃CO₂H
CH₃COOH ( acetic acid)→ Carboxylic acid (-COOH group)
*
Gravity affects the mass of a brick.
True
False
Answer:
True
Explanation:
Because anything that has mass also has gravity
Most favourable conditions for electrovalency are
(a) Low charge on ions, large cation and small anion
(b) High charge on ions, small cation and large anion.
(c)X High charge on ions, large cation and small anion
(d) Low charge on ions, small cation and large anion
bila da
Answer:
A: Low charge on ions, large cation and small anion
Explanation:
Electrovalency is defined as process of transfer of electrons from its valence shell from one atom to another to form ions in such a manner that both elements will achieve stable electronic configuration.
Now cations are positively charged ions and therefore the bigger the cation, the more electrons it looses and thus the more it favors Electrovalency.
While an ions are negative and the lesser they are the more they favor Electrovalency.
Thus, the correct answer is option A
. When a person weighs himself in pounds, which system of measurement is he using?
Answer:
answer: Weight is a 'force' and in the imperial system, it is measured in pounds-force (lbf or lbf). You might hear this term used together with the term 'slug'. A slug has a mass of 32.174049 lb. Explanation:
Explanation:
The unit pound is a unit of mass which is from the British imperial units of measurements. Pound is not included in CGS or SI units of mass.
What is mass?Mass of a substance is its total amount which can be expressed in any units such as g, Kg etc. Our mass is affected by the gravity and thus the total weight of a body is mass multiplied by gravity.
There are different system for units and each units of a measurement is interrelated. Units are very significant in measurements and to identify the variables.
The most commonly used unit system is international system of units called the SI system. Where the mass length and time are in Kg, m and seconds. In CGS system it is gram, meter and seconds.
Pound is unit of mass from imperial unit system of britain. One pound = 0.4533 Kg.
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What is the madd in grams of 0.40 moles of sodium borohydride, NaBH4
Answer:
Mass = 15.1 g
Explanation:
Given data:
Number of moles of NaBH₄ = 0.40 mol
Mass in gram = ?
Solution:
Formula:
Mass = number of moles × molar mass
Molar mass of NaBH₄ = 37.83 g/mol
By putting values,
Mass = 0.40 mol × 37.83 g/mol
Mass = 15.1 g
Use the information to calculate deltaGrxn at 298 K. 3H2(g) +N2(g) 2NH3(g) deltaHrxn = -92.38 deltaSrxn =-198.2 J/K deltaGrxn = ___kJ
Answer:
-33.3 kj
Explanation:
Answer:
first part = - 2453.1
second part = - 33.3
Explanation:
edg 22
What would happen if a plant was unable to receive pollen? A.the plant would continue to produce fruits and seeds. B.the plant would be unable to produce fruits and seeds.
C.Instead of the pistil producing pollen, the ovule would produce it.
D.Instead of the stamen producing pollen, the stigma would produce it.
Answer:
I think its B only because nothing else makes sense
Explanation:
but you should take your best guess
To solve this we must be knowing each and every concept related to plant. Therefore, if a plant was unable to receive pollen then the plant would be unable to produce fruits and seeds. The correct option is option B.
What is plant?Plants are mostly photosynthetic eukaryotes in the Plantae kingdom. Traditionally, the plant kingdom comprised all non-animal living creatures, including algae and fungi; but, all current definitions include Plantae exclude fungi and certain algae, as well as prokaryotes.
According to one definition, plants belong to the group Viridiplantae (Latin for "green plants"), which is sister to the Glaucophyta and includes green algae as well as Embryophyta (land plants). If a plant was unable to receive pollen then the plant would be unable to produce fruits and seeds.
Therefore, if a plant was unable to receive pollen then the plant would be unable to produce fruits and seeds. The correct option is option B.
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which is the formula of nitrogen (I) oxide?
Answer:
Oxides of nitrogen are a mixture of gases that are composed of nitrogen and oxygen. Two of the most toxicologically significant compounds are nitric oxide (NO) and nitrogen dioxide (NO2). Other gases belonging to this group are nitrogen monoxide (or nitrous oxide, N2O), and nitrogen pentoxide (NO5).
Explanation:
Water is one of the most important resources for humans. Some areas are known to have no water shortages, where other areas are now suffering the scarcity of water. List some factors that change the distribution of water abundance.
(written response)
Answer:
The factors are various, although there are main and accessories.
The main factor is the climate of the area, that is, if it is a rainier climate, there will be more water masses in the lands where this climate abounds (usually it is wet).
Other factors are: geographical features, flows, the path of rivers, lakes or lagoons, the presence or absence of ports, the number of trees and the distribution of rocks.
Explanation:
Another important factor is the height of the land, the higher the level of the earth, the more difficult it will be to accumulate water, this is how low areas are also flooded.
What is the Scientific notation for 0.10050
Answer:
1.005 x [tex]10^{1}[/tex]
Explanation:
2 3 5 6 7 Which best describes the reactants and products of photosynthesis? Reactants are formed inside the plant, and products are taken in from the environment by the plant. Reactants are taken in from the environment by the plant, and products are formed inside the plant. Reactants and products are formed inside the plant. Reactants and products are taken in from lite environment by the plant.
Answer:
reactants are taken in from the environment by the plant,and products are formed inside the plant.
Explanation:
what process is the foundation of almost all food webs
Answer:
The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers such as plants, algae, and cyanobacteria use the energy from sunlight to make organic matter from carbon dioxide and water. This establishes the beginning of energy flow through almost all food webs
A forest area is being used for a new housing development. Most of the trees have been removed to make room for the
new houses, Predict the impact that this will have on the birds in the area.
Answer:
The correct answer would be - lose their native habitats are forced to migrate into new areas in search of shelter and food.
Explanation:
The removal of trees or deforestation to build a housing or city planning or development impact the birds and other animals of that area. Cutting most of the trees from the area will result in a decrease in available food, shelter, and breeding habitat.
It causes complete removal of bird species and forced them to migrate to a new place in search of places that will provide a source of shelter and food for birds.
A compound is found to contain 64.80 % carbon, 13.62 % hydrogen, and 21.58 % oxygen by weight. What is the empirical formula for this compound
Answer:
Empirical formula is C₄H₁₀O
Explanation:
Values for C, H and O are determined as centesimal composition.
64.80 g of C in 100g of compound
13.62g of H in 100 g of compound
21.58 g of O in 100 g of compound.
We convert the mass to moles:
64.80 g . 1mol/ 12g = 5.4 moles of C
13.62 g . 1 mol /1g = 13.62 moles of H
21.58 g . 1 mol/16g = 1.35 moles of O
We pick the lowest value and we divide:
5.4 moles of C / 1.35 = 4 C
13.62 moles of H / 1.35 = 10 H
1.35 moles of O / 1.35 = 1 O
Empirical formula is C₄H₁₀O, it can be the diethyl ether.
We confirm, the excersise is well done.
Molar mass = 74g/mol
74 g of compound we have (12 . 4)g of C
In 100 g of compound we may have (100 . 48) / 74 = 64.8 g
Kp for the following reaction is 0.16 at 25 degree C. 2 NOBr(g) 2 NO(g) Br_2(g) The enthalpy change for the reaction at standard conditions is
Answer:
Explanation:
Given that:
[tex]2 NOBr_{(g)} \iff 2 NO_{(g)} + Br_{2(g)}[/tex]
From above:
[tex]K_p = 0.16 = \dfrac{(P_{NO})^2 (P_{Br})}{(P_{NOBr})^2}[/tex]
To predict the effect of the addition of Br₂(g);
The addition of Br₂(g) will favor the equilibrium to shift to the left i.e. formation of NOBr
The removal of some NOBr will cause the equilibrium position to shift to the left side. This is because concentration on the left side is decreased and the concentration on the right side will be increased. Thus, the equilibrium will shift towards where the concentration is reduced which is the left side.
Which body system or systems are affected by asthma?
Answer:
The lungs
Explanation:
Asthma is a disease that affects the airways of your lungs. With asthma, your airways' lining tends to always be in a hypersensitive state characterized by redness and swelling. Causing the airways to swell and, in severe cases, close completely off.
hope this helps, this should also probably be in biology:)
