Answer:
No idea
Explanation:
I'll tell u how to do it. You multiply by amidagros number. that is how many atoms you have. Your welcome.
Can carbon and hydrogen form double bonds between them?
Answer:
Carbon has four valence electrons, so it can achieve a full outer energy level by forming four covalent bonds. When it bonds only with hydrogen, it forms compounds called hydrocarbons. Carbon can form single, double, or triple covalent bonds with other carbon atoms.
The carbon-hydrogen bond (C–H bond) is a bond between carbon and hydrogen atoms that can be found in many organic compounds. This bond is a covalent bond meaning that carbon shares its outer valence electrons with up to four hydrogens. This completes both of their outer shells making them stable.
^Hope it helps, Hazel^
Calculate the volume which 1.00 mole of a gas occupies at 1 atm and 298K?
Answer:
25.45 Liters
Explanation:
Using Ideal Gas Law PV = nRT => V = nRT/P
V = (1mole)(0.08206Latm/molK)(298K)/(1atm) = 25.45 Liters
A solution has [OH-]=3.5*10^-6. Based on that, what must be true about this solution?
Answer:
Option B. It is a basic solution.
Explanation:
To know which option is correct, let us calculate the pH of the solution.
First, we shall determine the pOH of the solution. This is illustrated below:
Concentration of Hydroxide ion, [OH¯] = 3.5×10¯⁶
pOH =.?
pOH = –Log [OH¯]
pOH = –Log 3.5×10¯⁶
pOH = 5.5
Finally, we shall determine the pH. This can be obtained as follow:
pOH = 5.5
pH =?
pH + pOH = 14
pH + 5.5 = 14
Collect like terms
pH = 14 – 5.5
pH = 8.5
The pH scale reads as follow:
0 to 6 => Acidic
7 => Neutral
8 to 14 => Basic
Comparing the pH of the solution (i.e 8.5) with the pH scale, we can conclude that the solution is basic because the pH of solution lies between 8 and 14.
What 2 phases of the water cycle most affect the imbalance of each of these?
Answer:
gas and leqwed
Explanation:
leqwed goes to gas
Answer: evaporation and precipitation
Which do you think has the greater total kinetic energy?
a. The molecules of the water in the teacup
b. The molecules of the water in the bathtub
Answer:
a The molecules of the water in the teacup
hope it helps
Why is this considered a theory instead of a hypothesis or a law?
(When a dangerous microscopic organism is transferred from one person to many people,
Answer:
This is considered a hypothesis because it hasn't been confirmed. It is just a guess.
Explanation:
A hypothesis is a limited explanation of a phenomenon; a scientific theory is an in-depth explanation of the observed phenomenon. Law is a statement about an observed phenomenon or a unifying concept, according to Kennesaw State University. However, Newton's law doesn't explain what gravity is, or how it works.
Answer:
c
Explanation:
A. It is a statement of fact about how nature works instead of an explanation.
B. It provides an explanation for many observations and accepted hypotheses.
C. It describes how to test a possible explanation of one specific relationship.
D. It has not changed over time even though new technology has been developed.
Cyanobacteria, also known as blue-green algae, are a kind of bacteria found in lakes. These organisms make their own food through photosynthesis. Small animals including mayfly larvae eat the cyanobacteria, and small fish such as yellow perch eat the larvae. The small fish provide food for larger fish, such as walleye.
Choose the level of the food pyramid that represents the energy role of cyanobacteria in the lake ecosystem.
Balance the following equation: AlCl3 + Cs --> CsCl + Al
Group of answer choices
A.2, 6, 6, 2
B.1, 3, 3, 1
C.3, 1, 3, 1
D.2, 3, 1, 3
Answer: The balanced equation is [tex]AlCl_{3} + 3Cs \rightarrow 3CsCl + Al[/tex]
Explanation:
A chemical equation which contains same number of atoms on both reactant and product side is called a balanced chemical equation.
For example, [tex]AlCl_{3} + Cs \rightarrow CsCl + Al[/tex]
Here, number of atoms on reactant side are as follows.
Al = 1Cl = 3Cs = 1Number of atoms on product side are as follows.
Al = 1Cl = 1Cs = 1To balance this equation, multiply Cs by 3 on reactant side and multiply CsCl by 3 on product side.
Hence, now the equation will be as follows.
[tex]AlCl_{3} + 3Cs \rightarrow 3CsCl + Al[/tex]
Here, number of atoms on reactant side are as follows.
Al = 1Cl = 3Cs = 3Number of atoms on product side are as follows.
Al = 1Cl = 3Cs = 3Thus, we can conclude that this equation is balanced.
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
Which of the following will form a metallic bond with a metal?
a
another metal
b
none of the other choices
c
semimetal
d
a nonmetal
zinc, sulphur, oxygen
What would this compound be called?
Zinc sulphate
Zinc sulphateZnSO₄
This is the answer.
Which body system includes the brain, spinal cord and nerves? A Circulatory B Reproductive C Nervous
Answer:
C. Nervous
Explanation:
The nervous system is a system of the body of living organisms which includes the brain, spinal cord and nerves.
Consider the sugar below.
CH2OH
О
CH2OH
Н
Н
Н
ОН Н
о
ОН
НО
т
ОН Н
Н
ОН
Т-
Н
Н
ОН
Which term best describes this sugar?
disaccharide
monosaccharide
polysaccharide
X saccharide
Which geologic features help scientists determine the relative ages of rocks by their positions? Select three options.
magma
erosion
intrusions
index fossils
cross-cutting relationships
helppp i need it nowwwww
Answer:
Option D, Index fossil helps scientists to determine the relative ages of rocks by their positions
Explanation:
Index fossils are arranged in layer in such a way that the lowest layer represent the oldest fossil and the top most layer represents the youngest fossil. Scientist use this concept to determine the relative age of the rocks based on their position beneath the earth’s surface
Hence, option D is correct
how moles are there in 15 grams of SiO2
How many grams are in 6.02E23 atoms of carbon?
Answer:
no sure
Explanation:
someone pls answer i will in fact give u brainliest
Answer:
d. Solid
Explanation:
It is frozen to be a glacier
Hope this helps :)
I need help with this please
Answer: the place that i put the letters is how it should look also 75% of your peas are green
Explanation:
what is global warming
What type of shape does a liquid have?
Answer:
no definite shape
Explanation:
Answer:
Liquids have no definite shape (takes the shape of its container) they have a definite volume. Particles are free to move over each other, but are still attracted to each other.
Explanation:
Hope this helps!
Se tiene un litronde solucion de agua con alcohol con una consentracion del 4.5% v/v ¿Cuanto alcohol se tiene en la solución
Answer:
45 mL
Explanation:
Tenemos los siguientes datos:
V = 1 L
C = 4,5% v/v
El porcentaje en volumen (%v/v) expresa el volumen de soluto (alcohol en este caso) que hay cada 100 mL de solución. Si la solución tiene una concentración del 4,5% v/v eso quiere decir que hay 4,5 ml de alcohol cada 100 ml de solución, de acuerdo a lo siguiente:
4,5% v/v alcohol = volumen alcohol/ volumen solución x 100 = 4,5 mL alcohol/100 mL solución= 4,5 mL alcohol/0,1 L alcohol
Por lo tanto, al multiplicar por el volumen total de la solución (1 L), obtenemos la cantidad total de alcohol:
4,5 mL alcohol/0,1 L alcohol x 1 L = 45 mL
How do different chemical reactions interact with the surrounding environment?
Answer:
The earth is made of chemical
Explanation:
Explanation:
because of the chemical made up with earth
What is the freezing point, in °C, of a solution made with 1.31 mol of CHCl₃ in 530.0 g of CCl₄?
Answer:
-96.6°C
Explanation:
Given:
moles CHCl3 = 1.31 molmass CCl4 = 530.0 gmass CCl4 = 530.0 g * (1 kg / 1000)
mass CCl4 = 0.5300 kg
First calculate the molality (m) of the solute, which is the moles of solute divided by the kg of solvent ([tex]\frac{moles}{kg}[/tex]):
molality CHCl3 = (mass moles CHCl3) / (mass CCl4 in kg)
molality CHCl3 = (1.31 mol) / (0.5300 kg)
molality CHCl3 = 2.471698m
Decrease in freezing point of solvent = (Kf) * (molality of solute)
Decrease in freezing point of CCl4 = (Kf) * (molality CHCl3)
Decrease in freezing point of CCl4 = (29.8°C/m) * (2.47m)
Decrease in freezing point of CCl4 = 73.6566°C
Then use the molality of the solute to calculate the change in freezing point and subtract the change from the original freezing point.
Freezing point of solution =
(freezing point of pure solvent) - (Decrease in freezing point)
Freezing point of solution = (-22.9°C) - (73.66°C)
Freezing point of solution = -96.6°C
Learn more about freezing point here: brainly.com/question/22888016
Question 24 of 33
Which of the following pairs of elements will form covalent bonds with each
other?
The Periodic Table
A. Magnesium (Mg) and oxygen (0)
B. Chromium (Cr) and zinc (Zn)
O
C. Silicon (Si) and nitrogen (N)
D. Potassium (K) and bromine (Br)
The elements that will form covalent bonds are Silicon (Si) and nitrogen (N), option C.
What are covalent bonds?A covalent bond is formed between two atoms by the mutual sharing of one or more pairs of electrons. The two atomic nuclei attract these electrons at the same time. When the difference in electro-negativities of two atoms is too small for electron transfer to form ions, a covalent bond forms.
Hydrogen (H₂) is a molecule with a single covalent bond as well as Halogens like Fluorine (F), Chlorine (Cl), Silicon (Si) and nitrogen (N).
Find out more on covalent bonds here: https://brainly.com/question/12732708
#SPJ1
Use the kinetic energy equation to explain why speed has a greater impact on kinetic energy than mass.
Answer: Hopefully this helps! sorry if not. :))
Speed has a greater impact on mass because its increases in velocity have an exponentially greater impact on translational kinetic energy because kinetic energy is proportional to velocity squared. Doubling an object's mass would only double its kinetic energy, however doubling its momentum would quadruple its velocity.
Which statement best explains how the conditions identified in Part A affect the availability of opal?
A
Weathering processes no longer occur in Australia, so no new opal is formed.
B
Gems do not need an exact combination of elements or minerals to form, so opal forms more easily.
C
Opal formation occurs over large periods of time, so the number of opal deposits is limited.
D
Volcanoes in Australia no longer provide high temperatures and pressures, so no new opal is formed.
Answer:
C
Explanation:
An unknown amount of sodium azide (NaN3) reacts and produces 0.033 moles of nitrogen gas. What mass of sodium metal is produced
Answer:
Mass of sodium metal is 130.87 gram
Explanation:
The complete reaction is
2 NaN3 --> 2 Na + 3 N2
We know that PV = nRT
n = [tex]\frac{PV}{RT}[/tex]
On substituting the given values, we get
[tex]n = \frac{\frac{99707}{101325}*75 }{0.082 *(273.15 +15)} \\n = 3.02[/tex]moles of N2
Sodium azide's molar mass
3.02 *(2/3) = 2.013 moles
Mass = 2.03 * 65.01 = 130.87 gram
If 148.8 grams HCl reacts with excess Zn, how many moles of ZnCl2 could be
formed? (Molar mass of HCI=36.46 g/mol)
Answer:
2.04moles
Explanation:
The balanced chemical equation of this reaction is given as follows:
Zn + 2HCl → ZnCl2 + H2
Based on the above balanced equation, 2 moles of hydrochloric acid (HCl) reacts to produce 1 mole of Zinc chloride (ZnCl2).
The question states that 148.8 grams HCl reacts. We need to convert this value to mole by using the formula;
mole = mass/molar mass
Molar mass = 36.46g/lol
mole = 148.8/36.46
mole = 4.08moles of HCl
Hence, if 2 moles of hydrochloric acid (HCl) reacts to produce 1 mole of Zinc chloride (ZnCl2).
Then, 4.08moles of HCl will react to produce (4.08 × 1/2)
= 2.04moles of ZnCl2.
fill in the blank if its true or false
T=True
F=False
_________ 1. Stars do not change over their life cycles.
_________ 2. A protostar is the latest stage of a star’s life.
_________ 3. The larger the mass, the shorter the life cycle.
_________ 4. The hottest stars are blue and the coolest stars are red.
_________ 5. The white dwarf eventually runs out of fuel and dies as a red dwarf.
_________ 6. Our Sun is in the main sequence at the moment.
Answer: 1. F
2. F
3. T
4. F
5. T
6. T
Explanation:
I am not sure i'm sorry if it isn't right
Can I have someone to talk to it’s really important and I need advice..
Answer:
go for it
Explanation:
Answer:
I would be happy to help
Explanation: