__Na3PO4 + __Sr(NO3)2 --> ___Sr3(PO4)2 + __NaNO3

If .0789 moles of Strontium Nitrate are reacted, how many moles of Sodium Phosphate were reacted?

Answer:

You need to measure 120.9132 grams of MgO and add to 1 liter of distilled water in a beaker.

Explanation:

Capital M stands for molarity, or moles/liter. So 3 M MgO means 3 moles per liter of MgO.

1 L × [tex]\frac{3 moles MgO}{1 L MgO}[/tex] = 3 moles MgO

This means you need to measure 3 moles MgO to put into 1 Liter of water.

But you don't know how much that is, so you need to convert moles to grams.

First you need to find how many grams are in 1 mole of MgO.

You can search the molar mass of MgO online to get: 40.3044 g

But if you don't have the internet, use the periodic table to add the masses of Mg and O: 24.305 g + 15.999 g = 40.3044 g

Then write the fraction so that the units cancel out, so you get grams by itself on the top of the fraction.

1 L × [tex]\frac{3 moles MgO}{1 L MgO}[/tex] × [tex]\frac{40.3044 g MgO}{1 mole MgO}[/tex] = 120.9132 g MgO

You need to measure 120.9132 grams of MgO and add to 1 liter of distilled water.

We will prepare 1 L solution of 3 M MgO, by dissolving 120.91 grams of MgO in 1 litre of water.

Molarity is define as the no. of moles of solute dissolve in per liter if solvent or solution & it is represented as:

M = n / v

In the question, it is given that:

Molarity of MgO = 3M i.e. 3 moles of MgO is present in 1 liter of solution.

So, we have moles of MgO = 3 moles

Now, we convert moles of MgO to grams to know how much of solute is required, in the following manner:

n = W / M, where

M = molar mass of MgO = 40.30 g/mole

W = to find?

W = 3 mole × 40.30 g/mole = 120.91 grams

Hence, 120.91 grams of MgO is required.

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Answer:

false

Explanation:

not all science is good, or has good effects

False.

Science can possibly be dangerous when used by the wrong people. It can be used to create bombs, bioweapons, and much more.

Please mark Brainliest if this was helpful, and let me know if you have questions! :)

Answer: This is the magic element for everything on Earth. All life on Earth depends on carbon (C). It is in nearly every biological compound that makes up our bodies, systems, organs, cells, and organelles. When you breathe out, there is a lot of carbon dioxide (CO2).

Explanation:

Answer:

Like Carbon dioxide? or just like carbon? well anyway we breath in oxygen and breath out carbon the carbon goes into the air and gets re-cleaned turned into oxygen again. And also thousands of cars that run everyday going places let out tons of carbon into the the air every minute. (aka which is bad for human society, considering there's probably more carbon in the air then there is oxygen.)

Explanation:

So yes carbon does apply in everyday life. By the way the other person is right too. :)

Answer:

Convex

Explanation:

8 guess not sure cause light rays should be converging to meet to their eye

Bond polarity and ionic character go hand in hand: We can say that polarity and ionic character are positively correlated. The classical way to determine either is to compare the electronegativity difference (ΔEN) between the bonding atoms. The greater the difference in electronegativity, the larger the dipole moment, the greater the polarity, and the greater the ionic character of the bond.

The Pauling electronegativity scale, which should be provided in most chemistry texts and is certainly available online, can be used to determine ΔEN. As a very general rule of thumb, an ΔEN that is equal to 2.0 or greater indicates an ionic bond. We don't have to worry about that here, though, since we're only interested in polarity. But this is just some conceptual relation to consider; indeed, ionic bonds can be seen as very polar covalent bonds (or covalent bonds with significant ionic character).

There is no known bond that has a 100% ionic character (ΔEN = 4), i.e., a purely ionic bond. But there are many bonds that we know of with 0% ionic character (ΔEN = 0), i.e., a completely nonpolar bond. We can think about this logically without even knowing specific electronegativity values: If the difference in electronegativity between two bonding atoms is 0, then the two atoms must have equivalent electronegativities. And when can this be the case? Well, atoms from the same element have the same electronegativity. So one case of completely nonpolar bonding would be covalent bonding between atoms of the same element.

In the question given, there are two such cases: P4 and Br-Br. P4 is a tetrahedral molecule composed of four covalently bonded P atoms, each one bearing a lone electron pair and bonded to the other three. With each P having the same electronegativity (ΔEN = 0), no P-P bond in P4 has a dipole moment, and the P4 molecule itself is nonpolar. Br-Br is how bromine is found naturally (as diatomic Br₂); since this is a covalent bond between the atoms of the same element, the ΔEN = 0 and there is no dipole moment. A bromine molecule is completely nonpolar.

Fluorine (F) has the greatest electronegativity among the elements, so whether the Te-F or the Cl-F bond has the greater polarity (i.e., the greater ΔEN) really depends on the electronegativity of Te and Cl.

But let's think about this first. Both Cl and F are halogens; Cl is in the period right below F, and, following periodic trends, Cl itself is quite electronegative. Generally, nonmetals don't form ionic bonds with each other (the underlying reason is complicated and not relevant here, but that notion agrees with ΔEN between any two nonmetals being less than 2.0). Nonmetallic elements can form very polar covalent bonds whose ΔEN is very close to 2.0, however.

Tellurium (Te) is a metalloid that is three periods below F. Electronegativity generally decreases as you go down a group. Even though Te and Cl are not in the same group, the fact that Te is two periods below should give a strong presumption that Te has a lower electronegativity than Cl. Moreover, electronegativity increases you move left to right on the periodic table (that is, as the group number increases); Te is in a group to the left of fluorine's and chlorine's. So, using periodic trends alone, we know that Te is in a group to the left of and below that of Cl, both of which trend toward decreasing electronegativity. Thus, it would be reasonable to assume that Te would have a smaller electronegativity than Cl. And so, the ΔEN of Te-F > ΔEN of Cl-F, which means the Te-F bond should have the greater polarity. And, indeed, this is true using the Pauling scale: The EN of F is 4.0; the EN of Cl is 3.0; and the EN of Te is 2.1.

In all, given that the ΔEN of P-P = 0; ΔEN of Br-Br = 0; ΔEN of Te-F = 1.9; and ΔEN of Cl-F = 1.0; the Te-F bond has the greatest polarity.

Answer: 3

Explanation:

3) both electrolytic cells and voltaic cells

The statement, that describes reduction occurs at the cathode is "both electrolytic cells and voltaic cells."

The gain of electrons is referred to as reduction. The species that is being oxidised is also known as the reducing agent or reductant, whereas the species that is being reduced is known as the oxidising agent or oxidant.

Reduction takes place at the cathode electrode whereas oxidation occurs at the anode in both galvanic and electrolytic cells, and electrons travel from the anode to the cathode.

Electrons must move toward the location of reduction since reduction is the addition of electrons. The negative charge is on the cathode of an electrolytic cell, while the positive charge is on the anode.

Hence, the correct answer is 3.

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#SPJ2

Answer:

2 atm

Explanation: add both partial pressures and subtract from total pressure

Answer: c

Explanation:

Answer:

Known as the "king of the jungle" or the "king of beasts," lions are at the top of the food chain, and they hunt and eat other animals to survive. Their niche in the ecosystem allows them to help with other animal population control and prevent the spread of disease.

Explanation:

Answer:

Ability to move

Must be able to eat

grow and develop

reproduce

respond to environment

taking in food

Explanation:

Hope this helped! Have a good day!

The position where a Period 4 element that is also a metal with three valence electrons would be located is: B) Position 15.

A periodic table can be defined as an organized tabular array of all the chemical elements, which is typically arranged in order of increasing atomic number or number of protons (in rows).

In Chemistry, a periodic table comprises seven (7) rows and eighteen (18) columns. Also, all chemical elements are arranged (grouped) on the periodic table based on their atomic number (number of protons).

In this context, the position where a Period 4 element that is also a metal with three valence electrons would be located is Position 15 on the periodic table.

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Answer:

law of inertia hope it helps

Answer:

f=ma

40=m*8

m=5kg

another object of same mass is added

=>m=5+5=10kg

f=10*8=80N

Explanation:

Answer:

A. Water

Explanation:

Virtually every known substance can be referred to as MATTER, as long as it has weight and occupies space. Matter can exists in three different forms namely: solid, liquid and gaseous states.

However, each state of matter has its own unique property that characterizes it. WATER is the only matter that can exists in the three different states as follows:

- LIQUID - WATER

- SOLID - ICE

- GASEOUS - STEAM OR VAPOUR.

Answer: A.Naci

Explanation:

Table salt is made from a combination of atoms of sodium (Na) and chlorine (Cl) in a ratio of 1:1 forming the compound NaCl.

Answer:

133.74 L

Explanation:

First we convert the given pressures and temperatures into atm and K, respectively:

Then we use the PV=nRT formula to calculate the number of moles of helium in the balloon, using the data of when it was on the ground:

Then, knowing the value of n, we use PV=nRT once again, this time to calculate V using the data of when the balloon was high up:

Answer:

38 g

Explanation:

I think thats the answer in your question

Answer: D. 239 g of [tex]Br_2[/tex]

Explanation:

To calculate the moles :

[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]    

[tex]\text{Moles of} KBr=\frac{356g}{119g/mol}=2.99moles[/tex]

The balanced chemical reaction is:

[tex]Cl_2+2KBr\rightarrow Br_2+2KCl[/tex]  

According to stoichiometry :

2 moles of [tex]KBr[/tex] produce =  1 mole of [tex]Br_2[/tex]

Thus 2.99 moles of [tex]KBr[/tex] produce =[tex]\frac{1}{2}\times 2.99=1.495moles[/tex]  of [tex]Br_2[/tex]

Mass of [tex]Br_2=moles\times {\text {Molar mass}}=1.495moles\times 159.8g/mol=239g[/tex]

Thus 239 g of [tex]Br_2[/tex] will be produced from 356 g of KBr.

Answer: 13.4

Explanation: i guessed it and got it correct on ck-12

STP is the standard pressure and temperature condition of the ideal gas. 0.13 moles of dinitrogen monoxide will be present at STP.

An ideal gas equation is a relation between the pressure, volume with moles, gas constant, and the temperature of the ideal gas. The ideal gas equation is given by,

[tex]\rm PV = nRT[/tex]

Given at STP,

Pressure = 1 atm

Volume = 300 L

Moles = ?

Gas constant =8.3144598 J per mol per Kelvin

Temperature = 273 K

Substituting values in the ideal gas equation we get:

[tex]\begin{aligned} \rm n &= \rm \dfrac{ PV}{RT}\\\\&= \dfrac{1 \times 300}{273 \times 8.314}\\\\&=0.1321\end{aligned}[/tex]

Therefore, 0.13 moles of dinitrogen monoxide are produced at STP.

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Answer:

26.795229

Explanation:

This is how much it is

thats very nice lol, things stuck in amber are very cool

Answer:

A. How much decay happens in each flashlight

Explanation:

In an experiment, the DEPENDENT OR RESPONDING VARIABLE is the variable that responds to changes being made to another variable called Independent variable. It is the variable that is measured by an experimenter.

In this question, an experiment was carried out to research the effect of sunlight on plastic decay. Three plastic flashlights were used for this experiment in which one was placed in a dark closet (control), and the others were placed in light at different times or intervals. However, the variable being measured or assessed is the decay of each flashlight. This means that "HOW MUCH DECAY HAPPENS IN EACH FLASHLIGHT" is the dependent variable.

Answer:

b

Explanation:

if there is a net force acting on an object, the object will have an acceleration and the objects velocity will change

Answer:

the answer is True

Explanation:

the answer is True

Answer:

pertane the stronger the force the larger amount of energy needed to break of the connection between the molecules