How many electrons does the Ca^2+ ion possess

Answer:

0.56 kg

Explanation:

F = ma. Force = Mass x acceleration

Let's take a look at why that works. If something has more mass ie atoms then it will require more effort to move it. If you want make something speed up at a higher rate then again you need to provide more of an effort. Therefore you need more force for both these situations.

Therefore the equation works.

Answer:

Magnesium dichloride

Explanation:

Answer:

Explanation:

To be accurate, it must be able to make measurements that are close to the actual value.

Answer:

Answer: To be accurate, it must be able to make measurements that are close to the actual value.

Explanation:

Answer:

To predict what triggers cell-to-cell communication

Explanation:

Methodologies used for studying cell-to-cell communication includes

1) The reductionist method in which cellular response are measured based on testing specific cellular signals by the introduction of different chemicals, so as to find the source that triggers the response

2) By the application of known chemical reagents enable or block specific areas of an organism's receptors and with the aid of an electrode measure the cellular response based on generated currents of ions or by collecting and analyzing fluid samples from the affected area.

Answer:

b

Explanation:

just took test

Answer:

gas

Explanation:

Answer:

Inertia.

Explanation:

The resistance of any physical object to any change in its velocity. This includes changes to the object's speed, or direction of motion. An aspect of this property is the tendency of objects to keep moving in a straight line at a constant speed, when no forces act upon them.

We have that for the Question "How can the motion of an object that is NOT moving change?" it can be said that Force is the reason for motion and is how can the motion of an object that is NOT moving change

From the question we are told

How can the motion of an object that is NOT moving change?

Generally

Motion defines as the movement of a body from one place to another

Therefore

What the question is asking is

What makes the movement occur

Force

Force is defines as Mass of of an object times its acceleration but aslo is

the work done in a given time frame

Therefore

Force is the reason for motion and is how can the motion of an object that is NOT moving change

For more information on this visit

https://brainly.com/question/23379286

Answer:

Option B. 28.5 amu

Explanation:

The following data were obtained from the question:

Isotope A:

Mass of A = 28.0 amu

Abundance (A%) = 14.0%

Isotope B:

Mass of B = 29.0 amu

Abundance (B%) = 66.0%

Isotope C:

Mass of C = 27.4 amu

Abundance (C%) = 20.0%

Atomic mass of element X =.?

The atomic mass of element X can be obtained by using the following formula:

Atomic mass = [(Mass of A × A%)/100] + [(Mass of B × B%)/100] + [(Mass of C × C%)/100]

Atomic mass of Element X = [(28 × 14)/100] + [(29 × 66)/100] + [(27.4 × 20)/100]

= 3.92 + 19.14 + 5.48

= 28.54 ≈ 28.5 amu

Therefore, the atomic mass of Element X is 28.5 amu

Answer:

Because that indicates that something is not stable. (im pretty sure that's the reason. Im not fully sure. Good question!)

Explanation:

Given :

Mass of methanol ( [tex]CH_3OH[/tex] ) , m = 5 kg = 5000 g .

Volume of water , [tex]V=2\ m^3=2000\ L[/tex] .

To Find :

Molecules of methanol per liter of water .

Solution :

Moles of methanol , [tex]n=\dfrac{5000}{32}=156.25\ mol[/tex] .

We know , 1 mole of a substance contains [tex]6.022\times 10^{23}\ mol^{-1}[/tex] .

So , total number of molecules :

[tex]M=156.25\times 6.022\times 10^{23}\\\\M=9.41\times 10^{25}[/tex]

Number of molecules per liter :

[tex]\dfrac{9.41\times 10^{25}}{2000}\\\\4.705\times 10^{22}[/tex]

Hence , this is the required solution .

Answer:

cactus

Explanation:

Its a plant so it makes it own food

Explanation:

Compound: a substance that is made up of more than 1 type of atom bonded together Example: H2O

Mixture: combination of two or more elements or compounds not chemicaly bonded together. example: Sugar and salt in one container

elements pure substance of an atom. Example: hydrogen

Answer:

Olivine

Explanation:

Hope this helps! :) x

Answer:

The answer is

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

volume = 42 mL

density = 1.65 g/mL

The mass is

mass = 1.65 × 42

We have the final answer as

Hope this helps you

Answer:

Density, D = 2g/cm^3

Explanation:

Given the following data;

Length = 2cm

Width = 3cm

Height = 2cm

Mass = 24g

Density = ?

Volume of a rectangular solid (V) = Length × Weight × Height

Therefore, V = L× W × H

Substituting the values, we have;

[tex]V = 2 *3 * 2 = 12[/tex]

V = 12cm

Density can be defined as the ratio of mass to volume i.e mass all over volume.

Mathematically, [tex]Density = \frac{Mass}{Volume}[/tex]

[tex]D = \frac{M}{V}[/tex]

Substituting the values, we have;

[tex]D = \frac{24}{12}[/tex]

Density, D = 2g/cm^3

Hence, the density of the rectangular solid is 2g/cm^3.