Which of the following is not a reason to volunteer?


A
to make money

B
to feel good about yourself

C
to have a sense of accomplishment

D
to gain experience

Answer:

C

Explanation:

C.OD diverse offspring with the same genes as the parent

Answer:

A substance consisting of 3.7 grams of beryllium fluoride would be equal to how many moles of beryllium  fluoride?

How many grams of sodium are equal to 1.5 moles of sodium?

Explanation:

The molar mass is related to number of moles and mass of an element or compound.

 Using the expression:

  Number of moles  = [tex]\frac{mass}{molar mass}[/tex]  

  For any problem, where the number of moles is known, we can find the mass.

A substance consisting of 3.7 grams of beryllium fluoride would be equal to how many moles of beryllium fluoride?

Here we know the mass, we simply use the molar mass to find the number of moles.

How many grams of sodium are equal to 1.5 moles of sodium?

Here number of moles is given, we use the molar mass to find the mass of the sodium given

Answer:

D

copper (II) sulfate pentahydrate

==>

[tex]CuSO _{4}.5H _{2}O[/tex]

Answer:

brain cell

Explanation:

hope this helps :)

Answer:

10.8

Explanation:

That's my guess, I hope you figure everything out though.

A nail contains 0.10 moles of iron. Therefore, 5.58g is the mass in gram of iron in the nail. Iron makes up 5% of the Earth's crust.

Iron makes up 5% of the Earth's crust and is the second most abundant metal after aluminum, and the fourth most abundant element after oxygen, silicon, and aluminum. Iron, the main component of Earth's core, serves as the most prevalent element on the planet and is relatively abundant in the Sun and in other stars.

The free metal is uncommon in the crust, appearing as domestic iron in basalts in Greenland as well as carbonaceous deposits in the United States, as well as kamacite, a low-nickel meteoric iron. Taenite, a natural alloy of nickel-iron, is found in terrestrial deposits including meteorites.

mass = moles ×molar mass

       = 0.10 ×55.8

       = 5.58g

Therefore, 5.58g is the mass in gram of iron in the nail.

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Answer:

Polar solvents because polar substances are likely to dissolve in polar solvents.

Explanation:

(pls mark me brainliest)

Answer:

a polar solvent

Answer:

10.5 miles

Explanation:

7x1.5=10.5

Answer:

4.6666667

Explanation:

Answer:

unevenly

Explanation:

Fresh water is distributed unevenly in both time and space.

Answer:

Explanation:

Particles of matter attract each other. There's a force that acts on the particulate matter that keeps it together.

I hope it help you?

Add me to a brainiest and i will add you too :)

Answer:

10.24 ×10²³ molecules

Explanation:

Given data:

Mass of COCl₂ = 218.4 g

Number of molecules = ?

Solution:

Number of moles of COCl₂:

Number of moles = mass/molar mass

Number of moles = 218.4 g/ 129.84 g/mol

Number of moles = 1.7 mol

1 mole contain 6.022×10²³ molecules.

1.7 mol × 6.022×10²³ molecules / 1mol

10.24 ×10²³ molecules

Answer:

C

Explanation:

they can be put in other languages

they are literally the name of the chemical

they don't show quantity

The "major drawback" to using word equations is that they are not quantitative. Option C is correct.

Chemical reactions are written in word equations to give a clear and concise understanding of the reaction taking place. However, word equations are not quantitative. A equation is a way of representing a chemical reaction using words. It identifies the reactants and products and their physical states as well as the condition under which the reaction is taking place.

For example, the word equation for the reaction between hydrogen gas and oxygen gas to produce water is:

Hydrogen gas + oxygen gas → water

Quantitative equations use chemical formulas, numbers and symbols to represent the reactants and products in a chemical reaction. They provide a quantitative understanding of the reaction in terms of the number of atoms and molecules involved.

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Answer:

Neon

Explanation:

Carbon has an atomic mass of 12

Neon has an atomic mass of 20

a. 2 M

b. 1.5 M

Given

a 4 moles in 2 dm of solution?

b 0.3 moles in 200 cm3 of solution

Required

The concentration of a solution

Solution

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

Can be formulated :

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

a.

moles(n) = 4

volume(V)=2 L solution

M = 4 : 2 = 2

b.

moles(n)=0.3

volume(V)=200 cm3 = 0.2 L

M = 0.3 : 0.2 = 1.5

a. solar energy

the earth is warmed by the sun, which is solar (or infrared).

Answer:

Imagewww.chem.purdue.edu › Equilibrium

Calculating the Hydroxide Ion Concentration from pOH

To calculate the pH of an aqueous solution you need to know the concentration of the hydronium ion in moles per liter ...

Calculating pH

Calculating hydronium ion ...

Calculating pOH

Calculating hydroxide ion ...

Calculating pKa

People also ask

How do you find hydronium ion concentration when given pH?

The hydronium ion concentration can be found from the pH by the reverse of the mathematical operation employed to find the pH. [H3O+] = 10-pH or [H3O+] = antilog (- pH) Example: What is the hydronium ion concentration in a solution that has a pH of 8.34? On a calculator, calculate 10-8.34, or "inverse" log ( - 8.34).

Answer:

it's already Balanced

MgO + Li2SO4 ---------✓ MgSO4 + Li2O

Answer:

Molarity = 3.46 M

Explanation:

Given data:

Percentage of silver nitrate = 40.0%

Density of AgNO₃ = 1.47 g/mL

Molarity of solution = ?

Solution:

40% means out of 100g we have 40 g of AgNO₃ and 60g solvent.

Number of moles of silver nitrate = mass /molar mass

Number of moles = 40 g/ 170 g/mol

Number of moles = 0.235 mol

Volume of solution:

Total mass of solution = 100 g

density = 1.47 g/mL which means there are 1.47 gram into 1 mL.

100 g/1 × 1mL/ 1.47 g × 1 L / 1000 mL

0.068  L

Molarity:

Molarity = number of moles / volume in L

Molarity = 0.235 mol / 0.068  L

Molarity = 3.46 M

Answer:

Average atomic mass of X= 64.25 amu

Explanation:

Abundance of X-64 = 80%

Abundance of X-65 = 15%

Abundance of X-66 = 5%

Average atomic mass = ?

Solution:  

Average atomic mass of X = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass)  + (abundance of 3rd isotope × its atomic mass)  / 100

Average atomic mass of X= (80×64)+(15×65) +(5×66) /100

Average atomic mass of X =  5120 + 975 + 330 / 100

Average atomic mass of X  = 6425/ 100

Average atomic mass of X= 64.25 amu.

Answer:

3.44× 10²³ atoms

8.73× 10²⁵ molecules

37.64 × 10²³ molecules

0.014 × 10²³ molecules

Explanation:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

18 g of water = 1 mole = 6.022 × 10²³ molecules of water

1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen

a) 0.572 moles of Al:

1 mole = 6.022 × 10²³ atoms

0.572 mol  ×  6.022 × 10²³ atoms / 1 mol

3.44× 10²³ atoms

b) 1.45× 10² moles of SO₂:

1 mole = 6.022 × 10²³ molecules

1.45 mol × 10² ×  6.022 × 10²³ molecules / 1 mol

8.73× 10²⁵ molecules

c) 6.25 moles of Ca(OH)₂

1 mole = 6.022 × 10²³ molecules

6.25 mol  ×  6.022 × 10²³ molecules / 1 mol

37.64 × 10²³ molecules

d) 0.0024 moles of CO₂

1 mole = 6.022 × 10²³ molecules

0.0024 mol  ×  6.022 × 10²³ molecules / 1 mol

0.014 × 10²³ molecules

Answer:

I believe the answer is b

Answer:

there would be chemicals on the food.

Explanation: Hope this helps :)

Answer:

0.25

Explanation:

From the given information:

The dominant trait R = red color; &

The recessive trait r = white

If a heterozygous traits Rr  crosses with a dominant trait RR;

The Punnet square will be as follows:

              R               r

R            RR             Rr

R            RR             Rr

Thus all the flowers are red and there is 50% dominant red rose flowers (RR) and 50% heterozygous red rose flowers (Rr).

Let assume that two heterozygous traits (Rr) cross together; Then the punnet square is:

          R         r

R        RR        Rr

r          Rr        rr

From the above punet square, we have:

0.25 dominant red rose flowers

0.5 heterozygous red rose flowers;

0.25 recessive white rose flowers.

Answer:

because its polluting the waters and they want to see if its harming the small sea life living in those locations

Explanation:

im 90% sure abt this srry if its wrong