Answer:
4.014 g of water
Explanation:
An internet search for your question tells me that the chemical equation is:
BaH₂(s) + 2H₂O(l) → Ba(OH)₂(aq) + 2H₂(g)So first we use PV=nRT to calculate the moles of hydrogen gas produced:
P = 755 mmHg ⇒ 755/760 = 0.993 atmT = 25 °C ⇒ 25 + 273.15 = 298.16 KV = 5.50 L0.993 atm * 5.50 L = n * 0.082 atm·L·mol⁻¹·K⁻¹ * 298.16 K
n = 0.223 mol H₂Now we convert mol H₂ to mol H₂O and finally to grams of water:
0.223 mol H₂ * [tex]\frac{1molH_{2}O}{1molH_{2}}*\frac{18g}{1molH_{2}O}[/tex] = 4.014 g H₂O
Jeremy throws his ball up in the air, but the ball falls back to the ground. What force made the ball move without ever touching the ball?
Answer:
the naswer is gravity pulling on the ball
Explanation:
Copper crystallizes in a face centered cubic lattice. if the edge of the unit cell is 351 pm what is the radius of the copper atom
Final answer:
The atomic radius of a copper atom in a face-centered cubic lattice with an edge length of 351 pm is approximately 123.675 pm.
Explanation:
Calculating the Atomic Radius in a Face-Centered Cubic Lattice
For copper, which crystallizes in a face-centered cubic (FCC) lattice structure, we can calculate the atomic radius if we know the edge length of its unit cell. Given that the edge of the FCC unit cell is 351 pm, we can use the fact that the diagonal across the faces of the cube (√2 times the edge length) is equal to four times the atomic radius in an FCC lattice. This is because in an FCC structure, atoms touch along the face diagonal.
To calculate the atomic radius, we use the formula:
4r = √2 × edge length
Therefore: r = (√2 × 351 pm) / 4
r ≈ (1.414 × 351 pm) / 4
r ≈ 494.7 pm / 4
r ≈ 123.675 pm
The approximate radius of a copper atom in an FCC lattice is 123.675 pm.
Which best explains how elements combine in different ways to produce compounds?
Elements combine in different ways to form compounds through chemical reactions, where bonds are formed holding the atoms together. The ratio of atoms in a compound is always a fixed, small, whole number, as per Dalton's atomic theory. Examples include water (H2O) and table salt (NaCl).
Explanation:Elements combine in different ways to produce compounds through a chemical reaction, which results in the formation of chemical bonds. For general reference, a compound is formed when two or more elements chemically combine, exhibiting definite chemical and physical properties distinct from its independent elements. Chemical bonds, namely ionic or covalent, hold the atoms together in a compound.
Take water as an example, it is a compound formed when two hydrogen atoms react with one oxygen atom, creating a molecule of water (H2O). In this compound, the ratio of hydrogen to oxygen atoms is 2:1, thus, presenting a clear demonstration of how elements combine in various ratios to create compounds with unique properties.
Another example can be the combination of sodium and chlorine to form table salt (NaCl). Here, one atom of sodium combines with one atom of chlorine. These examples manifest Dalton's atomic theory which elucidates that atoms of different elements can combine in fixed, small, whole-number ratios to form compounds.
Learn more about Formation of Compounds here:https://brainly.com/question/1600305
#SPJ12
The way elements combine to produce compounds is best explained by chemical reactivity. Therefore, the correct answer is option a. chemical reactivity.
To understand which option best explains how elements combine in different ways to produce compounds, let’s look at each choice:
a. Chemical reactivity: This describes how readily an element reacts with other elements to form compounds, based on their electron configurations.b. State of matter: This refers to whether an element is a solid, liquid, or gas at room temperature, which does not directly affect how elements combine chemically.c. Similar physical properties: Elements with similar physical properties do not necessarily form compounds together.d. Matching atomic numbers: Atomic number defines an element and does not affect how different elements combine to form compounds.Therefore, chemical reactivity, best explains how elements combine in different ways to produce compounds. This is because elements combine based on their electron configurations and how their atoms interact to form stable molecules.
complete question.
Which best explains how elements combine in different ways to produce compounds?
a. chemical reactivity
b. state of matter
c. similar physical properties
d. matching atomic numbers
Water molecules are made of slightly positively charged hydrogen atoms and slightly negatively charged oxygen atoms. which force keeps water molecules stuck to one another?
Water molecules are held together by an electromagnetic force known as hydrogen bonds. These bonds are a strong type of dipole-dipole interaction due to the partial positive charge of hydrogen atoms and partial negative charge of oxygen atoms. Option D is correct.
The electromagnetic force is responsible for keeping water molecules attracted to one another. More specifically, this attraction is due to hydrogen bonds, which are a strong type of intermolecular force. These bonds form because of the dipole interaction where the slightly positively charged hydrogen atoms of one water molecule are attracted to the slightly negatively charged oxygen atoms of another. Although individual hydrogen bonds are weaker than covalent and ionic bonds within molecules, they occur in large numbers in water, resulting in a significant force that holds the water molecules together.
Hydrogen bonds are particularly strong compared to other dipole-dipole interactions because of water's highly polar nature. This polarity is due to the oxygen atom in water being highly electronegative and possessing two lone pairs of electrons, resulting in a partial negative charge while the hydrogen atoms have a partial positive charge.
Hence, D. is the correct option.
The complete question is:
Water molecules are made of slightly positively charged hydrogen atoms and slightly negatively charged oxygen atoms. Which force keeps water molecules stuck to one another?
A.) Strong Nuclear
B.) Gravitational
C.) Weak Nuclear
D.) Electromagnetic
Sunspots appear dark because they are what ?
Sunspots appear dark because they are cooler than the surrounding areas of the sun's surface. The cooler temperature causes less light to be emitted, making the sunspots look dark.
Explanation:Sunspots appear dark because they are cooler than the surrounding areas of the sun's surface, also known as the photosphere. While they are still very hot, sunspots have temperatures of about 3,000 to 4,500 Kelvin, which is cooler than the average temperature of the photosphere, which is about 5,500 Kelvin. This difference in temperature causes less light to be emitted, and therefore the sunspots appear dark compared to the rest of the sun's surface
Learn more about Sunspots here:https://brainly.com/question/34790269
#SPJ6
What mass of argon occupies 4.3 l at 70 kpa and 20 c?
To find the mass of argon gas at 4.3 liters, 70 kPa, and 20 °C, use the ideal gas law, convert units to atm and Kelvin, solve for moles, and then multiply by the molar mass of argon to obtain the mass, which is approximately 4.07 grams.
Explanation:The question asks for the mass of argon gas that occupies a volume of 4.3 liters at a pressure of 70 kPa and a temperature of 20 °C. To answer this, we can use the ideal gas law equation, PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.
First, we convert the given temperature to Kelvin:
Next, we need to convert the pressure from kPa to atm, since the ideal gas constant (R) is typically given in L·atm/(mol·K):
We can then rearrange the ideal gas law to solve for the number of moles (n):
Using the values and R = 0.0821 L·atm/(mol·K), we calculate n:
Finally, using the molar mass of argon, which is about 39.948 g/mol, we find the mass:
Therefore, the mass of argon that occupies a volume of 4.3 liters at 70 kPa and 20 °C is approximately 4.07 grams.
A 55.50 g gas sample of a gas, at stp, has a volume of 15.0 l. calculate the molecular mass of the gas
The molecular mass of the gas is approximately 80.15 g/mol.
Explanation:To calculate the molecular mass of the gas, we first need to determine the number of moles of the gas. We can use the ideal gas law equation: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.
At STP (standard temperature and pressure), the pressure is 1 atm and the temperature is 273 K.
The volume of the gas is given as 15.0 L. We can rearrange the equation to solve for n, the number of moles:
n = PV / RT.
Substituting the given values, we have:
n = (1 atm) * (15.0 L) / (0.0821 L·atm/mol·K * 273 K).
Calculating this gives us n
= 0.6926 mol.
To calculate the molecular mass, we can divide the mass of the gas sample (55.50 g) by the number of moles (0.6926 mol).
Learn more about Molecular mass here:https://brainly.com/question/34129603
#SPJ6
A ping pong ball with a dent in it can be put into a pan of boiling water. After a short amount of time, the dent will pop out. Explain why this occurs.
Answer:
The right option is; b. the water caused an increase in temperature of the air inside the ball and an increase in pressure.
The dent (hollow area formed by pressing or hitting) from the ping-pong ball disappeared because energy was transferred from the hot boiling water in which the ball was placed to the air inside the ball. This transferred energy will increase the temperature of the air inside the ball and the air molecules will begin to move faster with a greater force. Hence, causing an increase in pressure.
Explanation:
Which substance is insoluble and floats in water? A) Ice shavings B) Wood shavings C) Salt crystals D) Sugar crystals
How many grams of MgCl2 will be obtained when 435 mL of 0.300 M HCl react with an excess of Mg(OH)2?
What is a functional group?
a group of organic molecules that work together to speed up reactions
a group of living things that are made up of organic compounds
a group of organs in the body that work together to perform a certain function
a group of atoms bonded to carbon that determines how the molecule will react
Answer:
A group of atoms bonded to carbon that determines how the molecule will react
Explanation:
Functional groups are atom or groups of atom attached to the organic compound in a specific manner.
Some of the examples of functional groups are:
-COOH, -Cl, -OH, -NO2, -COCl, -C=O, etc.
Functional groups determines the characteristics chemical properties of a organic compound.
The different organic compounds having same functional group undergoes same or similar type of reaction.
How is stoichiometry used to calculate the amount of product from amount of reactant?
Stoichiometry relates moles of rectant to moles of product
In the Bronsted-Lowry model of acids and bases, a(n) _____ is a hydrogen donor and a(n) _____ is a hydrogen acceptor.
In the Bronsted-Lowry model of acids and bases, an acid is a hydrogen donor and a base is a hydrogen acceptor.
What is Bronsted-Lowry acid and base?Bronsted-Lowry acid is any substance that donates a proton or hydrogen ion while a Brønsted-Lowry base is that which accepts an hydrogen ion.
Based on this definition, it can be said that a Brønsted-Lowry acid must possess hydrogen ion(s) to donate.
Examples of Brønsted-Lowry acid are as follows:
HClHCNH2SO4Therefore, in the Bronsted-Lowry model of acids and bases, an acid is a hydrogen donor and a base is a hydrogen acceptor.
Learn more about Brønsted-Lowry acid and base at: https://brainly.com/question/14407412
#SPJ2
The table shows the results of four surveys that randomly sampled 50 girls at a community center about their favorite sport at the center.
Swimming Basketball Soccer Total
Survey 1 16 15 19 50
Survey 2 15 15 20 50
Survey 3 7 35 8 50
Survey 4 14 18 18 50
Identify surveys that are likely biased. Based on the unbiased surveys, what percent of the girls at the community center are likely to choose swimming as their favorite sport?
14 %
23 %
26 %
30 %
Answer:
30%
Explanation:
The formula for carbohydrates is C n H 2n O n . Which statement accurately describes this general formula?
A_There are more carbon atoms than oxygen atoms.
B_There are twice as many carbon atoms as hydrogen atoms.
C_The ratio of the atoms is 1:1:2 in the carbohydrate formula.
D_There are twice as many hydrogen atoms as carbon atoms.
Hydrocarbons are chain-like or ring-like molecules made of carbon and ________ atoms.
Ch of these three gases is most abundant in the atmosphere? which of these three gases is most abundant in the atmosphere? carbon dioxide (co2) nitrous oxide (n2o) methane (ch
Answer is Carbon dioxide.
The given gases are trace gases. Our atmosphere
has 0.1% of trace gases. Among those trace gases, carbon dioxide level is
highest as 93.49%. Methane has 0.44% and amount of nitrous oxide is 0.07%. But
when considering the whole atmosphere nitrogen gas is the most abundant gas as
78% and next is oxygen as 21%.
Carbon dioxide is the most abundant of the three gases mentioned in the Earth's atmosphere. Nitrogen and oxygen are the most abundant gases overall. Methane is more effective on a per-molecule basis at heating the atmosphere than carbon dioxide.
The question involves identifying which of the three gases carbon dioxide ([tex]CO_2[/tex]), nitrous oxide ([tex]N_2O[/tex]), or methane ([tex]CH_4[/tex]) is most abundant in the Earth's atmosphere. When considering these gases specifically, carbon dioxide is the most abundant. However, it is important to note that the major components of the atmosphere are nitrogen (78.1%) and oxygen (20.9%), with gases such as argon, carbon dioxide, neon, helium, methane, and nitrous oxide present in much smaller amounts.
Regarding the effectiveness at heating the atmosphere, methane is more effective on a per-molecule basis than carbon dioxide due to its ability to absorb more heat. However, carbon dioxide is more abundant and also contributes significantly to the atmospheric warming, playing a crucial role in the Earth's greenhouse effect beside water vapor, the most abundant greenhouse gas.
Whats the point of love?
All animals want to survive. With this in mind, lets talk about some natural drugs that your body creates to create this feeling of "love".
P.E.A. is a natural anti-depressant that the body makes, kind of like dopamine. This is the most affiliated with the nickname "love drug". It creates the need to reproduce sexually. This is the primal instinct; to reproduce and pass on your genetic material.
Now, as you stay with one partner, you may find that the feeling changes a bit; this is P.E.A. turning into oxytocin. This is a deeper kind of love that humans develop once they have been with a partner for long enough. High levels of oxytocin are found when a mother has a child, usually found during breastfeeding.
There are many natural drugs that your body produces to create the feeling of love. If you have any questions, let me know! Hope this helps!
Use the changes in oxidation numbers to identify which atoms are oxidized and which are reduced in each reaction.
Final answer:
By assigning oxidation numbers, it is determined that Sr and O in H₂O are oxidized, while S in SO₃ and Kr are reduced in the given reactions. This identifies the substances undergoing oxidation and reduction.
Explanation:
To identify what is being oxidized and what is being reduced in each redox reaction, we first assign oxidation numbers to each atom in the reaction. The element whose oxidation number increases is oxidized, acting as the reducing agent. Conversely, the element whose oxidation number decreases is reduced, acting as the oxidizing agent.
Sr + SO₃ → SrSO₃: Sr goes from 0 to +2 (oxidized), and S in SO₃ goes from +4 to +6 (reduced).2KrF₂ + 2H₂O → 2Kr + 4HF + O₂: Kr goes from +2 to 0 (reduced), O in H₂O goes from -2 to 0 (oxidized).SO₃ + SCl₂ → SOCl₂ + SO₂: S in SO₃ goes from +6 to +4 in SO₂ (reduced), Cl in SCl₂ goes from +1 to -1 in SOCl₂ (oxidized).By tracking these changes in oxidation numbers, we can easily determine which substances are oxidized and which are reduced in these reactions. Remember, the oxidized substance loses electrons, and the reduced one gains electrons, according to the concept of redox reactions.
Why are the very lowest mass stars unable to fuse helium in their cores?
What is the volume occupied by 51.0 g of ammonia gas (nh3) at stp?
Answer : The volume of ammonia gas at STP is, 67.2 liters
Explanation : Given,
Mass of ammonia = 51.0 g
Molar mass of ammonia = 17 g/mole
As we know that,
At STP, 1 mole of gas contains 22.4 L volume of gas.
First we have to calculate the moles of ammonia gas.
[tex]\text{Moles of }NH_3=\frac{\text{Mass of }NH_3}{\text{Molar mass of }NH_3}=\frac{51.0g}{17g/mole}=3mole[/tex]
Now we have to calculate the volume of ammonia gas at STP.
As, 1 mole of ammonia gas contains 22.4 L volume of ammonia gas
So, 3 moles of ammonia gas contains [tex]3\times 22.4L=67.2L[/tex] volume of ammonia gas
Therefore, the volume of ammonia gas at STP is, 67.2 liters
How many ml of 0.112 M Pb(NO3)2 are needed to completely react with 10.0ml of a 0.105 M KI Given Pb(NO3)2 (aq) + 2KI(aq)=2KNO3(aq)?
Answer : The volume of [tex]Pb(NO_3)_2[/tex] needed are, 4.6875 ml
Explanation :
First we have to calculate the moles of [tex]KI[/tex].
[tex]\text{Moles of }KI=\text{Molarity of }KI\times \text{Volume of solution}=0.105mole/L\times 0.01L=0.00105mole[/tex]
Now we have to calculate the moles of [tex]Pb(NO_3)_2[/tex]
The given balanced chemical reaction is,
[tex]Pb(NO_3)_2(aq)+2KI(aq)\rightarrow 2KNO_3(aq)+PbI_2[/tex]
From the balanced chemical reaction, we conclude that
As, 2 moles of KI react with 1 mole of [tex]Pb(NO_3)_2[/tex]
So, 0.00105 moles of KI react with [tex]\frac{0.00105}{2}=0.000525[/tex] mole of [tex]Pb(NO_3)_2[/tex]
Now we have to calculate the volume of [tex]Pb(NO_3)_2[/tex]
[tex]\text{Volume of }Pb(NO_3)_2=\frac{\text{Moles of }Pb(NO_3)_2}{\text{Molarity of }Pb(NO_3)_2}[/tex]
[tex]\text{Volume of }Pb(NO_3)_2=\frac{0.000525mole}{0.112mole/L}=4.6875\times 10^{-3}L=4.6875ml[/tex]
conversion used : (1 L = 1000 ml)
Therefore, the volume of [tex]Pb(NO_3)_2[/tex] needed are, 4.6875 ml
How many elements are in a compound that has a formula NiCI2+6H2O?
How much ammonia (nh3) is produced from two moles of nitrogen gas? 3h2 + n2 --> 2nh3?
See the picture to answer the question
the solid line is the results obtained when no catalyst was used and the broken line is the results obtained when a catalyst was used .how much energy must the system absorb for the reaction to start if no catalyst was used?
What volume of 0.205 m k3po4 solution is necessary to completely react with 130 ml of 0.0116 m nicl2?
When a 2.5 mol of sugar (C12H22O11) are added to a certain amount of water the boiling point is raised by 1 Celsius degree. If 2.5 mol of aluminum nitrate is added to the same amount of water, by how much will the boiling point be changed? Use 3 – 4 sentences to explain your answer.
Please Help!
Will give most brainly
Answer is: boiling point will be changed by 4°C.
Chemical dissociation of aluminium nitrate in water: Al(NO₃)₃ → Al³⁺(aq) + 3NO⁻(aq).
Change in boiling point: ΔT =i · Kb · b.
Kb - molal boiling point elevation constant of water is 0.512°C/m, this the same for both solution.
b - molality, moles of solute per kilogram of solvent., this is also same for both solution, because ther is same amount of substance.
i - Van't Hoff factor.
Van't Hoff factor for sugar solution is 1, because sugar do not dissociate on ions.
Van't Hoff factor for aluminium nitrate solution is approximately 4, because it dissociates on four ions (one aluminium cation and three nitrate anions). So ΔT is four times bigger.
The answer should be 4°C....
What is the bond angle in a tetrahedral molecule? 120° 180° 109.5° 90°
The bond angle in a tetrahedral molecule is ideally 109.5° but can be slightly smaller in molecules like water and ammonia due to the presence of lone pairs of electrons.
Explanation:The bond angle in a tetrahedral molecule is 109.5°. However, it can differ slightly due to the effects of repulsion between atoms or if lone pairs of electrons are involved. For instance, in water, which has a tetrahedral structure, the angle is 104.5° due to the two lone pairs of electrons on the oxygen atom.
These lone pairs occupy more space, causing the bond angle to be slightly less than the ideal. Similarly, ammonia has a bond angle of 107.3° due to its one lone pair. Thus, while the ideal bond angle in a tetrahedral molecule is 109.5°, the presence of lone pairs can cause the angle to be slightly smaller.
Learn more about tetrahedral molecule bond angle here:https://brainly.com/question/3995950
#SPJ12
What are the relative ion concentrations in an acid solution?
An Arrhenius base is a
substance that dissociates in water to form hydroxide ions (OH⁻).
For example lithium hydroxide is an Arrhenius base:
LiOH(aq) → Li⁺(aq) + OH⁻(aq).
Answer:
more H+ ions
Explanation:
Question 1 unsaved the atoms of group b elements _____ electrons when they form ions. question 1 options: cannot be determined either gain or lose lose gain
How does the law of conservation of mass apply to this reaction: C2H4 + O2 → H2O + CO2?