Answer:
surface area of a solid reactant.
concentration or pressure of a reactant.
temperature.
nature of the reactants.
presence/absence of a catalyst.
How many sulfur dioxide
molecules are in 2.8 moles of
sulfur dioxide?
?]
[?]x10?
How long does it take the Earth to move from Point A to Point C?
Answer:
the answer should be six months
Which of the following does half-life measure? Question 2 options: gamma emission beta emission alpha emission radioactive decay rate
Answer:
b because the detective ate coffee all day
I have attached an image. You can see the answer choices as well as the question. Pls help me. 25 points
Answer:
B
Explanation:
When it freezes, it will be a solid. The molecules will barely move, not as much as in the other answer choices.
Which of the following provides the best evidence that a chemical change is taking place? A. metal object becomes shorter when it is cooled. B. Steam rises from the surface of a liquid. C A liquid forms as a solid object melts. D. A flame burns on the surface of a solid.
Why do we not use molecular formulae for polymers?
Answer:
Polymers are long chain molecules that occur naturally in living things and can also be made by chemical processes in industry. Plastics are polymers, so polymers can be extremely useful.
Explanation:
acids are and can destroy your skin and bones
Answer:
This is true.
Explanation:
You place a balloon in a closed chamber at standard temperature and pressure (STP). You triple the chamber pressure.
What happens to the balloon?
The volume stays the same.
The volume increases to three times its original volume.
The temperature must also change for the volume to change.
The volume decreases to one-third of its original volume.
Answer:
it pops?
Explanation:
What are some things that all plants need to grow?
Answer:
sunlight, water, carbon dioxide, soil, are the basics which you also have phosphorus and nitrogen
Calcium Carbonate decomposes at 1200°C to form carbon dioxide and
calcium oxide. If 25 L of carbon dioxide are collected at 1200°C, what will
the volume of this gas be after it cools to 25°C?
This is a Charles' Law problem: V1/T1 = V2/T2. As the temperature of a fixed mass of gas decreases at a constant pressure, the volume of the gas should also decrease proportionally.
To use Charles' Law, the temperature must be in Kelvin (x °C = x + 273.15 K). We want to solve Charles' Law for V2, which we can obtain by rearranging the equation into V2 = V1T2/T1. Given V1 = 25 L, T1 = 1200 °C (1473.15 K), and T2 = 25 °C (298.15 K):
V2 = (25 L)(298.15 K)/(1473.15 K) = 5.1 L.
The volume of this gas will be "5.1 L".
Given:
[tex]V_1 = 25 \ L[/tex][tex]T_1 = (1200+ 273 )K[/tex][tex]= 1473 \ K[/tex]
[tex]T_2 = (25+ 273)K[/tex][tex]= 298 \ K[/tex]
As we know,
→ [tex]\frac{V_1}{V_2} = \frac{T_1}{T_2}[/tex]
By substituting the values, we get
→ [tex]\frac{25 \ L}{V_2} = \frac{1473 \ K}{293 \ K}[/tex]
→ [tex]V_2 = \frac{25\times 298}{1473} \ L[/tex]
→ [tex]= 5.1 \ L[/tex]
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https://brainly.com/question/21437107
Zinc metal reacts with aqueous copper(II) chloride, as shown in this equation. If 3.03 x 1021 atoms of zinc react, how many grams of Cu will form? Show the sequence of conversions necessary, then calculate the numerical answer. Zn (s) + CuCl2 (aq) ---> ZnCl2 (aq) + Cu (s)
Answer:
0.320 g Cu.
Explanation:
Hello there!
In this case, case, according to the presented chemical reaction, it is possible to determine that the mole ratio of zinc to copper is 1:1 and therefore, we will have the same amount of atoms for the both of them. Moreover, since one mole of copper contains 6.022x10²³ atoms of this element, with a mass of 63.546 g (molar mass); it is possible for us to write up the following mathematical setup in order to calculate the produced grams of copper:
[tex]3.03x10^{21}atoms Zn*\frac{1atom Cu}{1atom Zn}*\frac{1molCu}{6.022x10^{23}atoms Cu}*\frac{63.546gCu}{1molCu} \\[/tex]
Thus, the numerical result turns out to be:
0.320 g Cu
Best regards!
Image attached 50 points!
You know the number of moles of Mg that react: 6 moles.
You don't know (yet) how many moles of Mg₃N₂ are produced when 6 moles of Mg react.
The coefficients of each substance in the chemical equation tells us the molar ratio between the substances. The coefficient of Mg is 3, and the coefficient of Mg₃N₂ is 1 (coefficients of 1 are implied and omitted). So, for every 3 moles of Mg that react, 1 mole of Mg₃N₂ is produced.
We can use the proportion set up in the image to calculate the number of moles of Mg₃N₂ produced. In the first fraction, the green-boxed numerator should be our known number of moles of Mg, that is, 6 moles Mg. In the second fraction, we insert our molar ratio. Since we want the product of these two fractions to have the units "moles Mg₃N₂," the numerator in the second fraction should be 1 mole Mg₃N₂ and the denominator should be 3 moles Mg.
Our setup should look like this:
[tex]\frac{\textrm{6 moles Mg}}{1} \times \frac{\textrm{1 mole }\mathrm{Mg_3N_2}}{{\textrm{3 moles Mg}}} = \textrm{2 moles }\mathrm{Mg_3N_2}.[/tex]
Indeed, 2 moles of Mg₃N₂ are produced.
Answer:
2 moles of Mg₃N₂ are produced.
Explanation:
2. Different versions of a gene
A. Allele
B. Inherited Trait
C. Gene
D. Chromosome
Answer:
a
Explanation:
Different versions of a gene are called alleles. Alleles are described as either dominant or recessive depending on their associated traits.
This gland of the endocrine and digestive systems produces insulin to help control the body's sugar levels and enzymes which aid in digestion.
Answer:
Pancreas.
Explanation:
Living systems are self-organized life forms and are known to be very much interactive with their surroundings or environment. Also, living systems are dependent on the flow of information, matter and energy at various levels.
Some examples of living systems in organisms are respiratory system, nervous system, digestive system, and circulatory system.
Additionally, living systems comprises of the following components; cells, organs, muscle, tissues, blood, etc.
An endocrine system refers to a series of ductless glands and organs responsible for the production and secretion of hormones that are used by the body for the performance of various functions such as metabolism, controlling growth, reproduction, mood, sleep, etc. These hormones are secreted directly into the circulatory system (blood) and then transported to the organs and tissues in the body.
Pancreas is one of the glands of the endocrine and digestive systems that produces insulin to help control the body's sugar levels and enzymes which aid in digestion.
Answer and explain why you chose it
Answer:
Umm I think it 2
Explanation:
What is the heat capacity of a substance in which 1050 grams will rise in temperature from 30.4°C to 25.7°C when it absorbs 2880 joules of heat?
Answer:
0.584 J/g°C
Explanation:
Using the formula as follows;
Q = m × c × ∆T
Where;
Q = amount of heat (joules)
m = mass of substance (g)
c = specific heat capacity (J/g°C)
∆T = change in temperature (°C)
According to the information in this question;
mass of substance (m) = 1050g
Initial temperature = 25.7°C
Final temperature = 30.4°C
amount of heat (Q) = 2880J
change in temperature (∆T) = (30.4°C - 25.7°C) = 4.7°C
Using Q = m.c.∆T
c = Q ÷ m∆T
c = 2880 ÷ (1050 × 4.7)
c = 2880 ÷ 4935
c = 0.584 J/g°C
The specific capacity of the substance is 0.584 J/g°C.
1) Which New York State landscape region is located at 42 N, 75 W?
A) Erie-Ontario Lowlands
B) Hudson-Mohawk Lowlands
C) the Catskills
D) Tug Hill Plateau
Answer:C) the Catskills
Explanation:
Which of the following changes will lead to an increase in the rate of dissolving.
a. increasing the surface area of the solute
b. stirring the solution
c. increasing the temperature of the solution
d. All of the above
Organisms with their genetic material in a nucleus include A. Plants B. Animals C. All of these D. Fungi
Answer:
I believe it is 3. All of these.
Explanation:
Not all organisms hold their genetic code (DNA) inside a nucleus. In fact, some organisms don't have a nucleus at all but I'm pretty sure that these three do. I would select all of these.
Hope that helps and have a nice day.
PLEASE ME!!!! ANSWER IF YOU KNOW THE ANSWER
Answer:
organism 1
Explanation:
the arrow points away from it so that means that it is being eaten and it always starts from a producer so organism 1 is likely a producer :)
PLEASE HELP WHAT IS THE RIGHT ANSWER
Answer:
C
Explanation:
Weak acids dissociate only slightly in an aqueous solution. The majority of molecules remain undissociated.
La capacidad calorífica del aluminio es de 0.9 J/g C. Determine la energía necesaria calentar un bloque de aluminio de 850 g de 22.8 grados a 94.6 grados Celcius.
Answer:
La energía necesaria para calentar el bloque de aluminio es 54927 J.
Explanation:
Se denomina calorimetría a la medición y el cálculo de las cantidades de calor que intercambia un cuerpo o un sistema.
De esta manera, entre el calor y la temperatura existe una relación de proporcionalidad directa (Dos magnitudes son directamente proporcionales cuando existe una constante de manera que cuando una de las magnitudes aumenta, la otra también; y lo mismo ocurre cuando alguna de las dos disminuye.). La constante de proporcionalidad depende de la sustancia que constituye el cuerpo como de su masa, y resulta el producto del calor específico por la masa del cuerpo. Entonces, la ecuación que permite calcular intercambios de calor es:
Q=c*m*ΔT
Donde Q es el calor intercambiado por un cuerpo de masa m, constituido por una sustancia de calor específico c y donde ΔT es la variación de temperatura.
En este caso:
c= 0.9 [tex]\frac{J}{g*C}[/tex]m= 850 gΔT= Tfinal - Tinicial= 94.6 C - 22.8 C= 71.8 CReemplazando:
Q= 0.9 [tex]\frac{J}{g*C}[/tex]*850 g* 71.8 C
y resolviendo se obtiene:
Q= 54927 J
La energía necesaria para calentar el bloque de aluminio es 54927 J.
1. The production of a slightly soluble solid compound in a double-
displacement reaction results in the formation of a
a. gas.
b. precipitate.
C. combustion reaction.
d. halogen.
Answer: precipitate
Explanation:
Describe the molecular structure of the three main types of lipids
Brainliest!!!!!
Answer:
Lipids are divided into three categories.
Triglycerides, phospholipids, and sterols are the three major forms of lipids.
How many moles are there in 34.5g of calcium phosphate?
At a football stadium, 5% of the fans in attendance were teenagers. If there were 160 teenagers at the football stadium, what was the total number of people at the stadium?
Answer:
yes
Explanation:
bc god exist
Answer:
3200
Explanation:
please help i will make you brainliest A water feature that could be a source of groundwater for humans is found at a location on a hillside where Earth’s surface is lower than the water table.
What type of feature might be observed at this location?
spring
aquifer
artesian well
unsaturated zone
Answer:
Spring
Explanation:
Spring is a place where water moving underground finds an opening to the land surface and emerges, sometimes as just a trickle, maybe only after a rain, and sometimes in a continuous flow. ... Note: This section of the Water Science School discusses the Earth's "natural" water cycle without human interference.
Answer:
aquifer=b
Explanation:
hope it helps
___ act as an energy source? (From work bank)
Explanation:
bit.^{}
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jjsjjsjsjjzjsjsjs
How many moles are present in 5.24g of H2O?
Answer:
The answer is 18.01528.
We assume you are converting between grams H2O and mole.
Explanation:
SEP Design a Solution A simple bread recipe calls for 400 g of flour, 7 g of salt
(NaCl), 1 g of yeast, and 0.3 L of water (H2O). You have exactly 0.6 mol of salt. If
you want to use all of the salt, how many loaves of bread could you make? How
much of each of the other ingredients would you need?
Answer:
5 loaves of bread, 5g of yeast
