Answer:
she has to get a doctor to treat the acid from burning or going through the skin
Explanation:
help me please. Can you please explain to me how to solve them? you can also send me a photo if that's better for you. thanks alot
Refer to the attachment
What is a catalyst?
will choose brainliest and rate 5 stars!!! Quick!!!!!!!!!!!!!!!!!
Answer:
A catalyst is a chemical that speeds up a reaction without being used up or chemically changed.
What are polyatomic compounds?
Long polymers made of monosaccharides that have been linked through dehydration reactions are called.
Long polymers made of monosaccharides that have been linked through dehydration reactions are called polysaccharides.
What are long polymers made of monosaccharides that have been linked through dehydration reactions called?Monosaccharides are known as simple sugars
Monosaccharides can be linked together by dehydration reactions to form long polymeric chains.
The long polymers are known as polysaccharides.
Therefore, long polymers made of monosaccharides that have been linked through dehydration reactions are called polysaccharides.
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Which gas produced during the reaction between hydrogen carbonate and acetic acid solution?
Answer:carbon dioxide gas
Explanation:you can tell when gas if forming when you can see the formation of bubbles
What is the molar mass of diphosphorous heptasulfide
Answer:
347.6995462
Phosphorus heptasulfide, free from yellow and white phosphorus appears as light-yellow crystals, light-gray powder, or fused solid. Melting point 310°C.
...
I need help with chemistry!!! 20 points
Answer:
See explanation
Explanation:
Write a balanced equation for rusting. (Assume rust becomes Fe+2)
Answer:
4Fe + 3O2 + 6H2O → 4Fe(OH)3
Explanation:
The chemical formula for rust is Fe2O3 and is commonly known as ferric oxide or iron oxide. The final product is a series of chemical reactions simplified below as- The rusting of the iron formula is simply 4Fe + 3O2 + 6H2O → 4Fe(OH)3. The rusting process requires both the elements of oxygen and water.
Cu + 2 AgNO3 + Cu(NO3)2 + 2Ag
If 7.28 moles of copper and 7.28 moles of silver nitrate are available to
react, what is the theoretical yield of silver produced?
Answer:
7.28 moles Ag°
Explanation:
Cu° + 2 AgNO₃ => Cu(NO₃)₂ + 2Ag°
Given 7.28 moles 7.28 moles
To determine limiting reactant, divide the mole values by the respective coefficient of balanced equation. The resulting smallest value is the limiting reactant. Note: this is a short cut method for determining limiting reactant only. Once the limiting reactant is determined one must use the given mole values of the limiting reactant to solve problem. That is ...
Limiting reactant determination:
Cu° + 2 AgNO₃ => Cu(NO₃)₂ + 2Ag°
Cu: 7.28 / 1 = 7.28
AgNO₃ : 7.28 / 2 = 3.64 => Limiting Reactant is AgNO₃
Solving Problem depends on AgNO₃; Cu will be in excess.
Since coefficients of AgNO₃ & Ag° are equal, then the moles AgNO₃ used equals moles Ag° produced and is therefore 7.28 moles Ag°.
What are some major similarities and differences between freshwater and marine ecosystems? (Site 1).
Answer:
Similarities
1. Fresh water and marine water both are essential parts of the water cycle.
2. They contain the same chemical and the amount of minerals in both the ecosystems is same.
3. Both addresses to the aquatic development.
Dissimilarities
1. Marine water carries much higher amounts of suspended chemicals as related to fresh water.
2. This larger collection of the chemical also increases the quantity of salt in marine water than that of fresh water.
3. Plant and animals existing in these water bodies also differ.
Some Major Similarities in freshwater and marine ecosystems are; Biodiversity, Food Chains and Webs, Nutrient Cycling, Adaptations, Habitat Diversity, and some Major Differences are; Salinity, Physical Properties, Organism Adaptations, Species Composition, Global Distribution.
Here are some major similarities and differences between freshwater and marine ecosystems;
Major Similarities;
Biodiversity: Both ecosystems support a wide variety of plant and animal species adapted to their unique environments.
Food Chains and Webs: Both ecosystems exhibit complex food chains and food webs, where organisms interact as predators, prey, and producers.
Nutrient Cycling: Nutrient cycles, such as the carbon, nitrogen, and phosphorus cycles, are crucial in both ecosystems for the growth and development of organisms.
Adaptations: Organisms in both ecosystems have evolved specific adaptations to thrive in their habitats, such as temperature, light availability, and predator avoidance.
Habitat Diversity: Both ecosystems can contain diverse habitats, including open water areas, submerged vegetation, and shorelines.
Major Differences:
Salinity: The most significant difference is the salt content. Freshwater ecosystems have low salt concentrations, while marine ecosystems contain high salt concentrations.
Physical Properties: Freshwater ecosystems include rivers, lakes, and ponds, often with slower water movement. Marine ecosystems encompass oceans, seas, and coral reefs, which have higher salt content and stronger currents.
Organism Adaptations: Organisms in marine ecosystems have adaptations to deal with high salinity, pressure, and other oceanic conditions. Freshwater organisms are adapted to changes in water flow, temperature, and nutrient availability.
Species Composition: Different species inhabit each ecosystem due to varying physical and chemical conditions. For example, marine ecosystems may include saltwater fish and coral reefs, while freshwater ecosystems are home to freshwater fish and aquatic plants.
Global Distribution: Freshwater ecosystems are distributed globally but cover a smaller portion of Earth's surface compared to marine ecosystems, which dominate the majority of the planet's surface.
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What is called the powerhouse of a cell because it breaks down nutrients to help make the major energy source of the cell?.
12 Chlorine gas is bubbled into aqueous potassium iodide.
What is the ionic equation for the reaction that takes place ?
HELP PLZZZ
the answer is a because the positive cations are attracted to the negative cathode. when the positive ions get to the cathode they pick up an electron and this produces normal sodium.
How many molecules of glucose are in 5. 72 grams of glucose c6h12o6?.
Answer:
5.72 g ( 1 mol / 180.16 g ) ( 6.022 x 10^23 molecules / mole ) = 1.90x10^23 molecules
Sugar dissolves when stirred into coffee. The coffee is the ________, the sugar is the ________, and the sweetened coffee is the ________
Answer:
The coffee is the solvent. The sugar is the solute. The sweetened coffee is the solution.
Explanation:
Sugar dissolves when stirred into coffee. The coffee is the solvent, the sugar is the solute, and the sweetened coffee is the solution.
Step 4: Measure Solubility in Room Temperature Water
C %
30
www.
20
80
100 ml
60
40
10
20
С
Temperature of the water to the nearest degree:
°C. DONE
Answer:
24
Explanation:
Temperature of the water to the nearest degree is 24°C.
What is Temperature ?Temperature is a physical quantity which measures hotness and coldness of a body. Temperature measures the degree of vibration of molecule in a body. Temperature is measured in centigrade (°C), Fahrenheit (°F) and Kelvin (K) in which Kelvin (K) is a SI unit of temperature. Absolute scale of temperature means Kelvin scale of temperature. relation between Kelvin(K) and centigrade(°C),
°C= K - 273.15 from equation, 273.15 K means 0 °C, which is freezing point of water (ice). when we give temperature to the body, its molecule or atom absorbs thermal energy and vibrate about their mean position.
In this picture, looking at the temperature scale there is 5 lines for 10°C. hence there is 1 line for 2°C.. In the scale mercury has raised at 2 bars above the 20°C. Hence 20+4 = 24°C.
Hence the answer is 24°C.
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Steel can be defined as
A) A pure substance composed of elements
B) A pure substance composed of compounds
C) A heterogeneous mixture of element
D) A homogeneous mixture of elements
This problem is asking for the type of matter steel is classified as. Thus, one concludes it is D) A homogeneous mixture of elements, according to:
Matter and its typesIn science, we can define matter as everything that has mass and takes up space. Thus, we can also define two types of matter, pure substances and mixtures.
In pure substances, we have elements, found along the periodic table (K, Br, Ag, etc,.) and compounds, which consist of two or more elements (H₂O, CO₂, etc,.).
On the other hand, we have mixtures, which can be homogeneous, without the possibility for us to distinguish among the components, and heterogeneous, with the possibility to do so.
In such a way, since steel is known as a metallic allow, mostly comprising iron and carbon, in a indistinguishable way, one infers the answer is D) A homogeneous mixture of elements.
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Answer: D) A homogeneous mixture of elements
Explanation:
This problem is asking for the type of matter steel is classified as. Thus, one concludes it is D) A homogeneous mixture of elements, according to:
Matter and its types
In science, we can define matter as everything that has mass and takes up space. Thus, we can also define two types of matter, pure substances and mixtures.
In pure substances, we have elements, found along the periodic table (K, Br, Ag, etc,.) and compounds, which consist of two or more elements (H₂O, CO₂, etc,.).
What floats on top of molten magma under the earth’s surface?.
Explanation:
Earthquakes. are caused by the earth's crust, more specifically, tectonic plates that float on top of molten magma. These plates bump into each other. it's the answer Earthquakes.
How many moles are in 63 g of NH4 (molar mass= 18g)?
a. 2 moles
b. 1 moles
c. 3.5 moles
d. 5 moles
To answer this question, all you to do is to divide the mass by the molar mass and that should get you your moles.
[tex]=63g\ NH_{4}\ x\ \frac{1\ mol\ NH_{4}}{18g\ NH_{4}}[/tex]
= 3.5 mol NH₄
[tex]\qquad \qquad\huge \underline{\boxed{\sf Answer}}[/tex]
Here's the solution ~
[tex]\qquad \sf \dashrightarrow \: 18g = 1 \: mole[/tex]
[tex]\qquad \sf \dashrightarrow \: 1g = \dfrac{1}{18} \: moles[/tex]
[tex]\qquad \sf \dashrightarrow \: 63g = \dfrac{1}{18} \times 63\: moles[/tex]
[tex]\qquad \sf \dashrightarrow \: 63g = \dfrac{7}{2} \: moles[/tex]
[tex]\qquad \sf \dashrightarrow \: 63g = 3.5 \: moles[/tex]
Correct choice is C
Determine whether BaI2 is soluble, slightly soluble, or insoluble in water.
Determine whether ZnCrO4 is soluble, slightly soluble, or insoluble in water.
Determine whether FeF2 is soluble, slightly soluble, or insoluble in water.
Determine whether Li2CO3 is soluble, slightly soluble, or insoluble in water.
pls I need help quickly
Help this is due tmr
Answer:
the 3rd one
Explanation:
we learned about this already
A bulb is found to weigh 5.76 grams more when filled with air at 298 K and 1.00 atmosphere pressure than when it is evacuated. What is the volume of the bulb? (Consider air to be 80% nitrogen and 20% oxygen by volume)
Answer:
Subtract water vapor pressure from total pressure to get partial pressure of gas A: PA=1.03 atm- 1 atm=0.03 atm.
What is the total pressure of the gases at 298 K?
98.8 kPa
A sample of nitrogen gas is bubbled through water at 298 K and the volume collected is 250 mL. The total pressure of the gas, which is saturated with water vapour, is found to be 98.8 kPa at 298 K.
The total pressure of a mixture of gases can be defined as the sum of the pressures of each individual gas: Ptotal=P1+P2+… +Pn. + P n . The partial pressure of an individual gas is equal to the total pressure multiplied by the mole fraction of that gas.
How do you find the partial pressure of water in air?
e is vapor pressure Rv = R∗/Mv = 461.5Jkg−1K−1 and Mv = 18.01gmol−1, ϵ = Mv/Md = 0.622. The vapor pressure is the partial pressure of the water vapor. where es is in Pascals and T is in Celsius.
ExpHow do you find the pressure of h2?
For the high pressures in which hydrogen gas is often stored, the van der Waals equation can be used. It is P+a(n/V)^2=nRT. For diatomic hydrogen gas, a=0.244atm L^2/mol^2 and b=0.0266L/mol.lanation:
The backbone ___ number of bones called veterbrae.
A) 32
B) 33
C) 34
D) 35
Answer:
Option B is correct option
what would be the water potential of pure water at atmospheric pressure?
Answer:Zero is the value of water potential of pure water at atmospheric pressure
Explanation:
i hopes it helps
During the nuclear fission process, the transformation between a parent and daughter isotope involves a a release of neutrons and energy. b an increase in total energy. c the transformation of chemical energy to potential energy. d the transformation of heat energy to kinetic energy.
Answer:
The energy harnessed in nuclei is released in nuclear reactions. Fission is the splitting of a heavy nucleus into lighter nuclei and fusion is the combining of nuclei to form a bigger and heavier nucleus. The consequence of fission or fusion is the absorption or release of energy.
Introduction
Consider the following equation. Fe2O3(s) 3H2(g) Right arrow. 2Fe(s) 3H2O(g) Delta. H = 98. 8 kJ, and Delta. S = 141. 5 J/K. Is this reaction spontaneous or nonspontaneous at high and low temperatures? spontaneous at high temperatures, nonspontaneous at low temperatures nonspontaneous at high and low temperatures spontaneous at low temperatures, nonspontaneous at high temperatures spontaneous at high and low temperatures.
The reaction is spontaneous at high temperatures, and non-spontaneous at low temperatures.
In a thermodynamically closed system, the measure of the non-expansion work by the system and the enthalpy and the entropy is said to be the Gibbs free energy.
How to determine the Gibbs free energy?According to the reaction, the enthalpy change [tex](\rm \Delta H)[/tex] and the change in the entropy [tex](\rm \Delta S)[/tex] is positive. The Gibbs free energy is given by, [tex]\rm \Delta G = \Delta H - T \Delta S[/tex] and the reaction will be spontaneous only when the [tex]\rm\Delta G[/tex] is negative.
If there is not much effect on the enthalpy and entropy due to a decrease in temperature, then the value of the Gibbs free energy will be positive and will be close to that of the enthalpy change. In the above reaction enthalpy, change is positive and hence the reaction will be non-spontaneous.
When the temperature is increased then the entropy will affect the overall reaction as the Gibbs free energy will have the opposite sign as that of the entropy. So the reaction will become spontaneous at high temperatures.
Thus, option A is correct.
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Answer:
A) spontaneous at high temperatures, nonspontaneous at low temperatures
Explanation:
EDGE 2022
Select the correct answer. What determines the average kinetic energy of the particles in a gas? A. The number of collisions B. The number of particles C. The size of the particles D. The temperature.
Answer:
D
Explanation:
The one above me, and another question resembling this one can attest that is, indeed, the temperature....
a liquid that occupies a volume of 5.0L gas a mass of 6.0 kg. what is the density of the liquid in kg/L?
Answer:
1.2Kg/l
Explanation:
Density=Mass/Volume
Density=6.0/5.0
Density=1.2Kg/l
PLEASE HELP!!!! THIS IS URGENT
Magnesium has several isotopes. Atoms of three of these isotopes have 12, 13, and 14
neutrons, respectively. What is the atomic number, mass number, and number of protons and electrons of each of magnesium’s isatopes?
Answer:
see explanation
Explanation:
Pastoral farming is best described as _______. A. A method of raising livestock and moving herds b. An African method of agriculture c. A method of cultivating crops on poor soils d. A common method of desert farming.
Pastoral farming is best described as a method of raising livestock and moving herds.
What is pastoral farmingPastoral farming is a system of farming that aims at producing animals rather than crops.
In pastoral farming, the herd of animals are moved from one place to another in search of food and water.
Therefore, pastoral farming is best described as a method of raising livestock and moving herds.
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Answer:
The answer to that question would be (A)
Explanation:
Pastoral farming is best described as _______.
a.
a method of raising livestock and moving herds
considering the chemical reaction for cellular respiration, what must be included in the respirometer containing the germinating seeds?a)carbon dioxideb)boiled waterc)oxygend)warm water and light
Answer:
c) oxygen
Explanation: In order for pea seeds to germinate, they require moisture. In order for cellular respiration to occur, oxygen is required.
