is the aswer H2S:SO2=2:2 and O2:H2O=3:2
sodium bicarbonate reacts with sulfuric acid to form sodium sulfate, carbon dioxide, and water. calculate the mass od sodium bicarbonate necessary to produce 1.75 g of carbon dioxide gas.
How would i even go about doing this?,
Write a balanced symbol equation for the complete combustion of propanol
#1: Which scientist is credited with developing the orbital model of the atom?
A. J.J. Thomson
B. Ernest Rutherford
c. Niels Bohr
D. Democritus
***idk really... I'm guessing jj thomson tho... not too sure.. :/,
Each equation is incorrect. find the errors, then rewrite and balance each equation. cl2 + nai → nacl2 + i nh3 → n + h2 na + o2 → nao2
1) Balanced chemical reaction: Cl₂ + 2NaI → 2NaCl + I₂.
Chlorine and iodine are diatomic molecules.
2) Balanced chemical reaction: 2NH₃ → N₂ + 3H₂.
Nitrogen and hydrogen are diatomic molecules.
3) Balanced chemical reaction: 4Na + O₂ → 2Na₂O.
Sodium in compounds has oxidation number +1 and oxygen -2.
atoms with 5 valence electrons usually form how many bonds?,
what type of science uses the ph scale
#1: Which element has the same number of energy levels as bromine (Br) and the same number of valence electrons as barium (Ba)?
A. potassium (K)
B,. beryllium (Be)
c. cadmium (Cd)
D. calcium (Ca)
***not too sure on this one... is it D. calcium (Ca) ??,
#1: Karen measures the volume of a gas at 200 K and 100 kPa. To correct her measurement to standard temperature and pressure (STP), what must she do?
A. make a volume correction based on a higher pressure of 200 kPa
B. make a volume correction based on a higher temperature of 273 K
C. make a volume correction based on a lower pressure of 50 kPa
D. make a volume correction based on a lower temperature of 73 K
**my answer: B
is that right?,
helppppppppppppppppppppppppppppp
Determine the molecular formula of a compound that is 54.5% C, 13.7% H, and 31.8% N. The molar mass is 88.0.
What motivated arrhenius to calculate how changes in carbon dioxide might affect the climate?
50 g of nitrogen (n2) has a volume of ___ liters at stp. (40 l)
50 g of nitrogen (n2) has a volume of 40 liters at stp.
The question is asking for the volume of 50 g of nitrogen (N2) gas at standard temperature and pressure (STP), which is defined as 0 degrees Celsius and 1 atmosphere of pressure. At STP, one mole of an ideal gas occupies 22.4 liters. First, to find the volume, we need to calculate the number of moles of nitrogen gas we have using its molecular weight (28.0 g/mol):
Number of moles (n) = Mass of N2 (g) / Molecular weight of N2 (g/mol) = 50 g / 28.0 g/mol ≈ 1.786 moles
Now applying the molar volume at STP:
Volume (V) = n (moles) × Molar volume at STP (L/mol) = 1.786 moles × 22.4 L/mol ≈ 40 liters
So, 50 g of nitrogen gas has a volume of approximately 40 liters at STP.
The typical carbon atom is described in the periodic table by the accompanying box. how many neutrons are in a typical carbon atom?
What is the mass, in grams, of 6.33 mol of nahco3?
What is the ph of a soft drink in which the major buffer ingredients are 6.6 g of nah2po4 and 8.0 g of na2hpo4 per 355 ml of solution?
pH is the estimation of the acidity and the basicity of the solution. The pH of the soft drink with buffer ingredients will be 7.218.
What is pH?pH is the negative logarithm of the hydrogen ion concentration in an aqueous solution.
Moles of sodium dihydrogen phosphate is calculated as:
[tex]\begin{aligned}\rm moles &= \dfrac{6.6}{120} \\\\&= 0.055 \;\rm moles \end{aligned}[/tex]
The molar concentration of dihydrogen phosphate is calculated as,
[tex]\begin{aligned} &= \dfrac{\text{Moles of dihydrogen phosphate}}{\text {Volume }}\\\\&= \dfrac{0.055}{355 \times 10^{-3}}\\\\&= 0.155 \;\rm M\end{aligned}[/tex]
The complete dissociation of monosodium phosphate can be shown as,
[tex]\rm Na_[2}HPO_{4} (aq) \rightarrow 2Na^{+} (aq) + HPO_{4}^{2-} (aq)[/tex]
When 1 mole of monosodium phosphate = 142 g/mol
Then, moles = 0.0563 moles
The molar concentration of dihydrogen phosphate will be:
[tex]\begin{aligned} &= \dfrac{0.0563}{( 355 \times 10^{-3})}\\\\&= 0.1586\;\rm M\end{aligned}[/tex]
The partial dissociation of both the weak acid is given as:
[tex]\begin{aligned}\rm [H^{+}] &= \rm Ka \times \dfrac{([H_{2}PO_{4}^{-}]}{[HPO_{4}^{2-}]}\\\\ &= (6.20 \times 10^{-8}) \times (\dfrac{0.155}{0.1586})\\\\ &= 6.059 \times 10^{-8}\;\rm M \end{aligned}[/tex]
pH can be calculated as:
[tex]\begin{aligned} \rm pH &= \rm - log[H^{+}]\\\\ &= \rm - log (6.059 \times 10^ {-8})\\\\ & = 7.218\end{aligned}[/tex]
Therefore, 7.218 is the pH.
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Cooks use baking soda to make cakes light and fluffy. You might have used baking soda yourself. Baking soda is NaHCO3. A 0.1 M solution of baking soda and water has a [H+] of about 4.0 X 10^-9. (You may prefer to think of the Hydronium ion concentration, [H3O+], as 4.0 X 10-9.) write the formula for the calculation of pH, and then show each job as you calculate the pH of 0.1 M solution of baking soda.,
Answer
is: pH = 8,046.
c(H₃O⁺) = 4·10⁻⁹ M
= 4·10⁻⁹ mol/L = 0,000000004 mol/L.
pH = -logc(H₃O⁺).
pH = -log(4·10⁻⁹ mol/L).
pH = -(-8,046) = 8,046.
When pH is less than seven (pH<7),
solution is acidic.
When is equal seven (pH = 7), solution is
neutral.
When pH is greater than seven (pH >
7), solution is basic (like this example).
The pH of a 0.1 M solution of baking soda is calculated using the formula pH = -log[H+] and is approximately 8.4, indicating a slightly basic solution. Baking soda is a weak base and reacts with acids to produce CO₂, making baked goods light and fluffy.
To calculate the pH of a 0.1 M solution of baking soda (NaHCO₃), you need to use the formula for pH calculation:
pH = -log[H⁺]
Given that the [H+] (or [H₃O⁺]) concentration is 4.0 X 10⁻⁹, the calculation would be as follows:
pH = -log(4.0 X 10⁻⁹)
pH ≈ 8.4
This indicates that the solution is slightly basic, which aligns with baking soda's properties as a weak base.
Using the equation 2H2 + O2 --> 2 H2O, if 192 g of O are produced, how many grams of hydrogen must react with it? Help me understand how to do this?
AT LEAST 15 POINTS ON CHEMISTRY PLS HELP
what type of reaction is illustrated?
2HBr+Ba(OH)₂ ⇒ BaBr₂ + 2H₂O
A.synthesis
B.decompisition
C.double replacement
Answer:
Definetely a double replacement
Explanation:
#1: What is usually released in a combustion reaction?
A. energy
B. elemental oxygen
C. a carbon-based fuel
D. elemental carbon
**my answer; A. energy
is that right?,
In order to reproduce, many flowering plants use external agents, such as insects or birds, to aid in the pollination process. What function do the color and odor of the flowers provide for the flowering plants?
A.
They help the plant feel happy and confident.
B.
They attract birds and insects which aid in the pollination process.
C.
They scare off larger animals that eat plants.
D.
They keep the pollinating insects from eating the plants.
The insects, birds, etc. are called pollinators. Because they help in pollination. The flowers attract birds and insects which aid in the pollination process. The correct option is B.
What is pollination?The process in which the pollen grains are transferred from the anther to the stigma of flowers is defined as the pollination. The agents which are responsible for the pollination are pollinators.
The flowers use scent to attract pollinators. A signal which helps the pollinators to find the particular flower is known as the scent. These floral scents are known to be a complex mixture of highly volatile compounds and essential oils that is emitted by the flowers into the atmosphere.
A flower scent's structure, color, and odor are the important factors which attract the pollinators. Those plants pollinated by bees and flies have sweet scents and those pollinated by beetles have fruity odors.
Thus the correct option is B.
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What are the general properties of the elements in the first two groups on the right side of the modern periodic table?
Scientists classify rocks into three different types. What is the main for basis for the classification system they chose?
Rocks are classified into igneous, sedimentary, and metamorphic types based on their formation. Igneous rocks crystallize from magma or lava, sedimentary rocks form from compacted sediments, and metamorphic rocks arise from the alteration of existing rocks under heat and pressure. This classification helps to understand Earth's geological history.
Scientists classify rocks into three different types based on the process of their formation. Each type of rock - igneous, sedimentary, and metamorphic - forms in a unique way, giving us clues about the Earth's history at the time of their formation.
Three Main Categories of Rocks
Igneous rocks form from the cooling and solidification of magma or lava. As the molten material cools, minerals crystallize and interlock.Sedimentary rocks form from the compaction and cementation of sediments, which can be pieces of other rocks or minerals that precipitate out of a solution.Metamorphic rocks are created when pre-existing rocks are transformed under heat and pressure, resulting in new mineral patterns or orientations, known as foliation.
The rock cycle encompasses the transitions between these rock types, including the processes of melting, cooling, erosion, sedimentation, and metamorphism.
predict the product for PtCl4 + F2
The main source of phosphorous is in: rocks water plants the atmosphe
Answer:
rocks
Explanation:
Answer:
Rocks
Explanation:
Consider the reaction: 2A(g)+B(g)→3C(g). When A is changing at a rate of -0.110M⋅s−1, How fast is C increasing?
The activation energy for the reaction no2(g)+co(g)⟶no(g)+co2(g) is ea = 175 kj/mol and the change in enthalpy for the reaction is δh = -200 kj/mol . what is the activation energy for the reverse reaction?
Final answer:
The activation energy for the reverse reaction of NO2(g) + CO(g) → NO(g) + CO2(g) is 375 kJ/mol. This is calculated using the formula that subtracts the change in enthalpy from the activation energy of the forward reaction.
Explanation:
The activation energy for the reverse reaction can be determined using the concept that the activation energy for a reaction and the activation energy for the reverse reaction must total the energy difference between the reactants and the products, which is given by the change in enthalpy (ΔH). The given forward reaction NO2(g) + CO(g) → NO(g) + CO2(g) has an activation energy (Ea) of 175 kJ/mol and a change in enthalpy (ΔH) of -200 kJ/mol.
To find the activation energy for the reverse reaction, we use the formula:
Activation energy of reverse reaction = Activation energy of forward reaction - ΔH
Plugging in the values we get:
Activation energy of reverse reaction = 175 kJ/mol - (-200 kJ/mol)
This calculation yields an activation energy for the reverse reaction of 375 kJ/mol.
The type of organism likely to suffer the most from the effects of biological magnification is a _____. secondary consumer decomposer tertiary consumer primary consumer
Answer:
tertiary
Explanation:
Which Of the following compounds is an electrolyte?
a)rubbing alcohol
b)sugar
c)silicon dioxide
d)sodium hydroxide
Under what conditions does a precipitate form in an aqueous chemical reaction
Answer : The condition in which precipitation reaction can occur in any aqueous chemical reaction is when the cations of one reactant and the anions of other reactant reacts in aqueous solutions forms an insoluble ionic solid, which is called as "Precipitate".
It is widely known that most of precipitation reactions are formed in a double-replacement reaction. Where one element is displaced by another element of higher reactivity.
Final answer:
A precipitate forms in an aqueous reaction when cations and anions combine to create an insoluble solid, as determined by solubility rules. An example is the reaction between potassium iodide and lead (II) nitrate forming lead (II) iodide. Precipitation reactions are critical both in natural processes and the chemical industry.
Explanation:
Conditions for Precipitate Formation
Precipitates form in aqueous chemical reactions when cations and anions from different compounds combine to create an insoluble ionic solid. This often occurs during what is known as a double-replacement reaction. To determine if a reaction will produce a precipitate, one must consult the solubility rules which provide guidelines about the solubility of various ionic compounds in water.
For example, when aqueous solutions of potassium iodide and lead (II) nitrate are mixed, a precipitation reaction takes place due to the formation of lead (II) iodide, an insoluble solid:
2KI(aq) + Pb(NO₃)₂(aq) → 2KNO₃(aq) + PbI₂(s)The driving force behind such reactions is the creation of an insoluble compound that precipitates out of the solution. These reactions are not only significant in natural processes, like the formation of coral reefs and kidney stones but are also extensively utilized in the chemical industry and in analytical techniques like gravimetric analysis and spot tests.
are these compounds— methane and CH4 ionic or covalent?
Final answer:
Methane (CH4) contains non-polar covalent bonds between its carbon and hydrogen atoms, forming a tetrahedral molecular structure with evenly distributed electron sharing due to sp³ hybridization.
Explanation:
Methane, also known by its chemical formula CH4, is a compound composed of carbon and hydrogen atoms. The bonds between a carbon atom and hydrogen atoms in methane are covalent bonds. Specifically, these are non-polar covalent bonds because the carbon atom, which has four electrons in its outermost valence energy shell, shares a single electron with each of the four hydrogen atoms, which have one valence electron in their first energy shell. The electron distribution is equal among the bonds, resulting in a molecule with a tetrahedral geometry where the carbon atom exhibits sp³ hybridization and serves as the center of the tetrahedron while the hydrogen atoms are located at the corners.