Answer:
[tex]\boxed {\boxed {\sf A. \ SiCl_4}}[/tex]
Explanation:
We are given the compound name: silicon tetrachloride.
Silicon is a metalloid and chlorine is a nonmetal, therefore we must use the rules of molecular compounds. Molecular compounds use prefixes to name the compounds. Break up the compound into 2 parts.
1. Silicon
The first element: silicon, has no prefix. Therefore, a prefix of mono (1) is implied.
2. Tetrachloride
The -ide suffix is added to the second element, so this is really chlorine. The prefix of tetra means 4.
So there is 1 silicon (Si) atom and 4 chlorine (Cl) atoms. The formula must be SiCl₄
What is an example of quantity of the resource being used by humans that affected
Answer:
1. Healthy and well educated people contribute to their societies in positive way
2. Malnourished and illiterate people cannot contribute much to their respective societies.
Explanation:
Why is chemistry important? i need 2 paragraph please
please help! Will give Brainliest!
Answer: the answer is c
Explanation:
also, is that canvas? sajdasds
Can someone help please I will give Brainlyiest
Answer:
See Explanation
Explanation:
moles of NH₃ = 11.9g/17.03 g/mol = 0.699 mole
moles of CN₂OH₄ = 1/2(0.699) mole =0.349 mole
Theoretical yield of CN₂OH₄ = (0.349 mole)(60 g/mole) = 20.963 grams
%Yield = Actual Yield/Theoretical Yield x 100%
= 18.5g/20.963g x 100% = 88.25%
Answer:
same process as last solution I did for you except the mole ratio isn't 1:1 here it is 2:1 so you diveide the moles of NH3 by 2 to get the urea moles
here I got 88.16% yield
Explanation:
What is the percent of water in the hydrate whose formula is MgCl2 •6H2O?
Here is my answer. I hope this is helpful.
Determine the percent yield for the reaction between 98.7 g of
Sb2S3 and excess oxygen gas if 72.4 g of Sb4O6 is recovered along with an unknown amount of sulfur dioxide.
The percent yield of the reaction would be 85.64%
Percent YieldFrom the balanced equation of the reaction:
[tex]9 O_2 + 2 Sb_2S_3 ---> 6 SO_2 + Sb_4O_6[/tex]
Mole ratio of Sb2S3 to Sb4O6 is 2:1
Mole of 98.7g Sb2S3 = 98.7/339.7
= 0.29 moles
Equivalent mole of Sb4O6 = 0.29/2
= 0.145 moles
Mass of 0.145 Sb4O6 = 0.145 x 583
= 84.535 g
Percent yield = yield/theoretical yield x 100
= 72.4/84.535 x 100
= 85.64%
More on percent yield can be found here: https://brainly.com/question/2506978?referrer=searchResults
Can y’all helping me solving this l will make you the brainlest❤️
Answer:
Genotype = genetic makeup or allele combination
phenotype = physical appearance
homzygous = both alleles are the same
heterozygous = both alleles are different
dominant allele = represented by a capital letter
recessive allele = lowercase letter
Is the reaction above a replacement reaction? Explain.
If Steve throws a football 57 meters in 3 seconds, what is the average speed of the football?
Answer:
19 m/s
Explanation:
57/3
How much heat is needed to warm 250g of water from 22℃ to 98℃?
Answer:
Thus, the required heat is 79kJ 79 k J .
Explanation:
i think its the right bottem one
A removal of the predator populations from an ecosystem would most likely result in
Answer:
Overpopulated prey.
Explanation:
Because if you remove the predators from the picture who's gonna eat the prey? So it would only make sense that the prey would overpopulate! Hope this helped! (^-^)
A removal of the predator populations from an ecosystem would most likely result in overpopulated prey.
What is ecosystem?An ecosystem, sometimes known as just an ecological system, primarily made up of all the species that dwell in the physical environment. These abiotic components are linked via nutrition cycles as well as energy fluxes.
Animals contribute significantly to the transport of nutrients as well as energy through the system by consuming plants and each other. They also influence the biomass concentrations of microbial and plant populations. A removal of the predator populations from an ecosystem would most likely result in overpopulated prey.
Therefore, a removal of the predator populations from an ecosystem would most likely result in overpopulated prey.
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Call each of your flowers as water employee increase rate of growth
(Help would be greatly appreciated) What is the molarity of a solution which contains 22.41 grams of NaCl in 50.0 mL of solution?
1. 0.488M
2. 7.67mol
3. 7.67M
4. 0.000767M
Answer:
7.67
Explanation:
According to molar concentration, the molarity of solution which contains 22.41 grams of NaCl in 50.0 ml of solution is 7.67 M.
What is molar concentration?Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.
The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.
In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.Substitution of values in the given formula gives, molarity= 22.41/58.44×1/0.05=7.67 M.
Thus, the molarity of solution which contains 22.41 grams of NaCl in 50.0 ml of solution is 7.67 M.
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Give the products of this neutralisation reaction: Sulfuric acid + magnesium hydroxide
Magnesium combined with sulfuric acid produces magnesium sulfate and hydrogen gas.
Determine the empirical formula of the compound with the percent composition of 26.6% K, 35.3% Cr and 33.0% O. *
3 points
Answer:
KCrO₃
Explanation:
26.6% K, 35.3% Cr and 33.0% O
The steps in obtaining the empirical formulae from percentage composition is given as;
Step 1:
Divide the percentage composition by the atomic mass of the elements
K = 26.6 / 39.0983 = 0.6803
Cr = 35.3 / 51.9961 = 0.6789
O = 33.0 / 16 = 2.0625
Step 2:
Divide all though by the smallest number (0.6789)
K = 0.6803 / 0.6789 = 1.002
Cr = 0.6789 / 0.6789 = 1
O = 2.0625 / 0.6789 = 3.038
The Empirical formular is the ratio between the elements. This given as;
KCrO₃
what phase of matter changes volume when moved from one container to another ?
Answer:
gas
Explanation:
Gas
Explanation:
The volume of gas varies inversely with the pressure, when temperature is kept constant.
If the amount of gas in a container is increased, the volume increases. If the amount of gas in a container is decreased, the volume decreases.
1. The diagram above shows the repeating groups of atoms that make up two samples. Will the
properties of the two samples likely be the same or different? (Examples of properties are smell,
color, and the temperature at which a substance melts.)
Answer:
Will likely be the same
Explanation:
We can see in both pictures there is a black molecule and a red molecule. However, we also have a purple molecule in one image and a yellow in the other. It would LIKELY be the same because we have more of the same molecules then more different molecules. Hope this helps
Use the diagram below to answer the question.
An Energy Relationship in an Ecosystem
grass
mouse
Which statement best describes the energy relationship shown between the organisms?
Both produce their own energy.
b Only the mice need energy to survive.
They compete for the same source of energy.
Energy flows from the producer to the consumer.
Answer:Where is the diagram
Explanation:
High-speed winds transfer more energy to the ocean’s surface, creating bigger waves.
Question 10 options:
True
False
Answer:
I think that would be true. The faster the wind, the longer it blows, or the farther it can blow uninterrupted, the bigger the waves. Therefore, a wave's size depends on wind speed, wind duration, and the area over which the wind is blowing
Answer: True.
Explanation: Yes, waves get energy from the wind through friction, so you see those waves get bigger each time. The longer the winds blows, the more friction, and energy it's getting, meaning better, and deadly waves. The wind can sometimes cause tsunamis if the its blowing too hard.
Glucose is produced through the process of photosynthesis
and is shown below. How many atoms of hydrogen are
present in one molecule of glucose?
6
3
12
24
As shown in the picture, the chemical formula for glucose is C6H12O6. This means that there are 6 carbons, 12 hydrogens and 6 oxygens in one molecule of glucose.
Your Answer: 12
Which of the following is NOT a combination reaction?
a NO + O2 + NO2
b Cr + Cl2 + CrCl3
C CH, + O2 + CO2 + H20
d C2H4 + H2 + C2H6
An ideal gas occupies a volume V at an absolute temperature T. If the volume is halved and the pressure kept constant, what will happen to it's temperature?
a. It will halve to T/2.
b. It will increase to 3T.
c. It will increase to 2T.
d. It will remain the same.
Answer:
It will be halve of T
Explanation:
V1 = V
T1 = T
V2 = ½V
T2 = x
V1/T1 = V2/T2
V/T = ½V/x
Vx = ½VT
2Vx = VT
2x = T
x = ½T
What is equilibrium in scientific terms? I need it broken down as simple as possible please because I don't understand it.
In science, literature, and everything, equilibrium has the same meaning. The meaning simply put, is balance. If you wanted a sentence example, it could be something like:
'He sat down to try and recover his equilibrium.'
Or
'They can't maintain enough equilibrium to ride a bike.'
I hope you understand the meaning now?
true or false plz help
Answer:
True
animals can only reproduce sexually
Explanation:
Answer:
It's true, I said true the other time but someone already answered so that's why i couldn't answer right now
Explanation:
1What are 2 examples of proteins in the body?
Answer:
1. Insulin
2. Keratin
Explanation:
Proteins are one of the four biological molecules found in living systems. They are polymeric molecules made up of monomeric units called AMINO ACIDS. Proteins perform a wide variety of functions in the body ranging from enzymatic functions to structural roles.
Two examples of proteins found in the body are keratin, insulin. Keratin is a structural protein located in the skin, hair and nails while insulin is an enzymatic protein that aids in digestion.
How much heat is needed to raise the temperature of 20.0g of H2O by 10.6oC?
Answer:
ΔH = 8.87 x 10₅
Explanation:
q = mcΔT = 20g x 1.00 cal/g°C x 10.6°C = 212 cals x 4.184 j/cals = 8.87 x 10⁵ joules
For the reaction 2h2+o2>h20, how many grams of water are produced from 70 grams of hydrogen
630g
Explanation:
firstly the equation has to be balanced. 2H2+o2>2H2o.
finding the mole of hydrogen?
mole = 70/2 which is equal to 35 mole of hydrogen.
35 mole of hydrogen is equal to the mole of water.
finding the mass of water=?
35=mass/18
mass= 35*18=630g of water
After Dalton's proposed atomic theory, several atomic models were developed. Which model was the first propose the existence of
small, dense nucleus?
Answer: Rutherford's model was the first propose of the existence of small, dense nucleus's.
Explanation: The atom, as described by Ernest Rutherford, has a tiny, massive core called the nucleus. The nucleus has a positive charge. Electrons are particles with a negative charge. Electrons orbit the nucleus. The empty space between the nucleus and the electrons takes up most of the volume of the atom.
Answer: Here is the correct image of the first atomic model it's in the picture!
Explanation: I did it on USA Test Prep to see which one is right
What is the charge on an atom after it gains two electrons during the formation of a bond?
One negative charge
One positive charge
Two negative charges
Two positive charges
Answer:
two negative charges is the answer of your question
1. What two types of cells contain chloroplasts?
Answer:
plant cells and eukroyatic algae