Which one of the following is a balanced equation?

Answer:

Alkylenes: any of the series of unsaturated hydrocarbons containing a triple bond, including acetylene.

alkanes​: Alkanes are organic compounds that consist entirely of single-bonded carbon and hydrogen atoms and lack any other functional groups. Alkanes have the general formula CnH2n+2 and can be subdivided into the following three groups: the linear straight-chain alkanes, branched alkanes, and cycloalkanes.

Explanation:

Answer:

ethical and aesthetic services and direct services

Explanation:

I just took the test and it's NOT indirect services and direct services like the other person said. It's ethical and aesthetic services and direct services.

Answer:

D) increasing particulates from volcanoes

Explanation:

Answer:

A) burning fossil fuels

Explanation:

B would help or slow down climate change, C would as well and D is something natural and not human-caused.

good luck, i hope this helps :)

Answer:  

Phosphorus pentachloride

Explanation: P is Phosphorus, Cl is Chlorine. Penta is latin for 5.

The name  of the covalent compound PCl₅ is phosphorous pentachloride as it has five chlorine atoms.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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Answer:

The answer is "Choice a".

Explanation:

In the given question, through the basis of their determined percentage yield, a smaller copper increase in value and less copper has been lost during decanting, but now this mistake in your experiment was the cause of confusion, and the wrong choice can be defined as follows:

Answer: 4873200 kg

Explanation:

Given mass: [tex]1.572\times 10^8[/tex] troy oz

Conversion factor : [tex]1troyoz=0.031kg[/tex]

Thus if 1 troy oz weighs in kg = 0.031 kg

[tex]1.572\times 10^8[/tex] troy oz will weigh in kg =[tex]\frac{0.031}{1}\times 1.572\times 10^8=0.04873\times 10^8kg[/tex]

Thus there are [tex]0.04873\times 10^8kg[/tex] in [tex]1.572\times 10^8[/tex] troy oz of silver used.

Answer:

Explanation:

Its simple

This is the number of atoms, ions, or molecules that a central atom or ion holds as its nearest neighbours in a complex or coordination compound or in a crystal.

for example: Sodium chloride (NaCl) or table salt is an ionic compound. It means that each cation will have exactly one anion associated with it, which means the cation Na+ and the anion Cl− have the same number of coordinates.

It may be really confusing at first

I recommend you go online and watch tutorial  videos on the topic

Answer:

Sedimentary rock.

Explanation:

When limestone form as ocean water evaporates and leaves calcium carbonate behind, they are then deposited in the seabed. Thus, the type of rock that can be formed this way is a sedimentary rock.

The texture of organic land-derived sedimentary rocks is fragmental or clastic. Sediments come from living organisms such as plants and animals to form organic sedimentary rocks.

Some examples of inorganic land-derived sedimentary rocks are conglomerate, brescia and sandstone.

In this scenario, a rock face at the top of a mountain is composed of layers in which seashells are embedded. This type of rock is a sedimentary rock.

Answer:

D) 3.51x10²³ formula units

Explanation:

To know this, we need to calculate the molecular mass of CaO. To do that, let's use the atomic mass of each element of this compound.

Ca: 40.08 g/mol;    O: 16 g/mol

With these given AM, let's calculate the molar mass of CaO:

Mm CaO = 40.08 + 16 = 56.08 g/mol

Now that we have the MM of CaO, it's time to determine the moles of CaO:

moles = mass / MM

moles = 32.7 / 56.08 = 0.5831 moles

Finally to get the formula units, we need to use the Avogadro's number which is 6.02x10²³. According to this number, 1 mole of any substance has this number of atoms, molecules or formula units. So, if we have 0.5831 moles, then the formula units will be:

FU = 0.5831 * 6.02x10²³

Hope this helps

Answer:

D: lithosphere

Answer:

A) 10 moles of CO and 5 moles O2

thnxx for free point? ?????????

Answer:

2.6  moles of HCl will produce moles of H2 =  [tex]1.3[/tex]

Explanation:

Mass of HCl is 36.458 g/mol

Mass of Hydrogen is 1.00794 g/mol

The balanced equation here is

Mg + 2_HCI → _MgCl2 + H2'

2 moles of HCl produces one mole of H2

One mole of HCl will produce moles of H2 =  [tex]\frac{1}{2}[/tex]

2.6  moles of HCl will produce moles of H2 =  [tex]\frac{1}{2} * 2.6 = 1.3[/tex]

please provide full questions

Answer:

it is most likely as a water cycle

The chemical formula for the polyatomic ion is NO₂⁻  and  name of  the following compound is tin (II) nitrite.

Chemical  formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols  of elements. It also makes use of brackets and subscripts.

Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form  is called empirical formula.

There are four types of chemical formula:

1)empirical formula

2) structural formula

3)condensed formula

4)molecular formula

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Answer:

it is d

Explanation:

Answer: d

Explanation: i think that answer

Answer:

D

Explanation:

THERE ARE 3 HYDROGEN ATOMS AND 1 NITROGEN SUPPORTING THE FORMULA OF AMMONIA NH3 AND TOTAL ATOMS IS ALSO 4.

Answer:

Name of two hard objects is Brick and Wood.

fire and mercury

i think i am not sure

but pls brainlist

Mass of NaCl = 29.25 g

Given

A 1.00 Liter solution of 0.500 M  Sodium chloride

Required

Mass of NaCl

Solution

Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution

[tex]\large{\boxed {\bold {M ~ = ~ \frac {n} {V}}}[/tex]

Input the value :

n = M x V

n = 0.5 x 1

n = 0.5 mol

Mass NaCl :

= mol x MW

= 0.5 x 58.5

= 29.25 g

Answer:

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Answer: 47.2 g of sodium azide

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

To calculate the moles, we use the equation:

[tex]\text{Number of moles of nitrogen}=\frac{\text{Given volume}}{\text {Molar volume}}=\frac{24.4L}{22.4L}=1.09moles[/tex]

The balanced chemical reaction is:

[tex]2NaN_3\rightarrow 2Na+3N_2[/tex]  

According to stoichiometry :  

3 moles of [tex]N_2[/tex] are produced by = 2 moles of [tex]NaN_3[/tex]

Thus 1.09 moles of [tex]N_2[/tex] are produced by =[tex]\frac{2}{3}\times 1.09=0.73moles[/tex]  of [tex]NaN_3[/tex]

Mass of [tex]NaN_3=moles\times {\text {Molar mass}}=0.73moles\times 65g/mol=47.2g[/tex]

Thus 47.2 g of sodium azide are required to produce 24.4 L of nitrogen gas at standard temperature and pressure

Answer:

To find out what water is made of, it helps to look at its chemical formula, which is H2O. This basically tells us that the water molecule is composed of two elements: hydrogen and oxygen or, more precisely, two hydrogen atoms (H2) and one oxygen atom (O). Hydrogen and oxygen are gases at room temperature.

Explanation:

Hope it is helpful.....

Answer:hidrogeno

Explanation:etsa se orfmapor un  prceso quimico entre elhirogendo

Answer:

his mother died i think

Explanation:

Although he was not accepted, his mother was determined to give her son a first-class education and they walked to St. Petersburg. Dmitri was accepted into the Institute of Pedagogy on a full scholarship. That same year his mother died and at the age of sixteen, Dmitri was orphaned.

Answer:

4.17mL of the stock solution of ethidium bromide must be added in the 50mL agarose solution

Explanation:

You want to dilute the ethidium bromide from 6mg/mL to 0.5mg/mL, that is:

6mg/mL / 0.5mg/mL = 12 times the stock solution must be diluted.

As the final volume of the solution is 50mL, you must add:

50mL / 12 =

4.17mL of the stock solution of ethidium bromide must be added in the 50mL agarose solution

Answer:

1024 sodium atoms.

Answer:

See answer below

Explanation:

In this case, we are treating an alcohol with different reagents to give different products. In the picture below you have the draw of each product, and here, the explanation.

a) H₂SO₄: In this case, it will promote an E1 reaction forming an alkene as product.

b) NaH: In this case, it will promote an acid base reaction, and the final product will be an alcoxide.

c) HCl/ZnCl₂: In this case, primary alcohols reacts with this reactive to form an alkyl halide.

d) HBr: Another reaction forming an alkyl halide with bromine in this case.

e) SOCl₂: Similar to c), it will form an alkyl chloride.

f) PBr₃: Similar to d, forming an alkyl bromide.

g) TsCl: Here it will be a sustitution reaction, where tosilate replaces the OH

h) NaH/CH₃CH₂Br: In this case it will form an alcoxide and then, a larger alkyl.

i) TsCl/NaSH: First it will form a tosilate and then, the SH group. A sustitution reaction.

j) POCl₃: A sustitution reaction forming an alkyl chloride.

See picture below for drawings.

Hope this helps

Answer: oml

Explanation: thats gross

i'd eat the pic below then that