Which of the following substances will dissolve in water? Check all that apply.
Magnesium Sulfate
Methane
Butane
Sodium nitrate​

Answer:

Hi!

So, a homogeneous mixture is when the parts that make up the mixture are all mixed in perfectly evenly, so they're only appearing as one uniform substance.

In a heterogeneous mixture, the pieces are not evenly mixed. A pizza has separate parts, like the crust and toppings, so it's a heterogeneous mixture.    

Answer:

Decreases  

Explanation:

Look for the ones with the same number of protons and different neutrons number

Answer:

It is a solution

Explanation:

I know that because a solution is something you mix and you have to use a microscope if you really wanna see what's in there

Answer:

Energy is used when someone is climbing while energy is not used when someone is going down the slope

Answer:

317.6 mL

Explanation:

Step 1: Write the balanced neutralization equation

MgO + 2 HCl ⇒ MgCl₂ + H₂O

Step 2: Calculate the mass corresponding to 640.0 mg of MgO

The molar mass of MgO is 40.30 g/mol. The moles corresponding to 640.0 mg (0.6400 g) of MgO are:

0.6400 g × (1 mol/40.30 g) = 0.01588 mol

Step 3: Calculate the moles of HCl that react with 0.01588 moles of MgO

The molar ratio of MgO to HCl is 1:2. The moles of HCl are 2/1 × 0.01588 mol = 0.03176 mol

Step 4: Calculate the volume of 0.1000 M HCl that contains 0.03176 moles

0.03176 mol × (1 L/0.1000 mol) = 0.3176 L = 317.6 mL

Answer:

24.32

Explanation:

From the question given above, the following data were obtained:

Isotope A:

Mass of A = 24

Abundance (A%) = 78.70%

Isotope B

Mass of B = 25

Abundance (B%) = 10.13%

Isotope C:

Mass of C = 26

Abundance (C%) = 11.17%

Average atomic mass of Mg =..?

The average atomic mass of Mg can be obtained as illustrated below:

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

Average atomic mass = [(24 × 78.70)/100] + [(25 × 10.13)/100] + [(26 × 11.17)/100]

= 18.888 + 2.5325 + 2.9042

= 24.3247 ≈ 24.32

Therefore, the average atomic mass of magnesium (Mg) is 24.32

Answer:

280 m/s

Explanation:

Answer:

Explanation:

Chemistry is the study of matter and the changes that matter undergoes. Matter is anything that has mass and takes up space.

Answer: True

Explanation:

Answer:

cool

Explanation:

Answer:

b

Explanation:

because I really want to talk to you about it when I get home

Answer:

I'm pretty sure k

Explanation:

I'm not for sure I'm trying to help

Answer:

Potassium

Explanation:

Atomic size decreases across a Period, from left to right as we face the Table, and INCREASES down a Group, a column of the Periodic Table.

Answer:

1 224.24242 kg/ m to the 3rd power

Answer:

Explanation:

shallow sea  

A shallow sea is best choice, although both are evaporites and would most likely be formed as either the sea evaporated, or in a playa setting (dry lake bed in a desert)

Answer:

oxygen and silicon

Explanation:

https://courses.lumenlearning.com/earthscience/chapter/minerals-and-mineral-groups/

"Nearly all (98.5%) of Earth’s crust is made up of only eight elements – oxygen, silicon, aluminum, iron, calcium, sodium, potassium, and magnesium – and these are the elements that make up most minerals."

Of available answers:

a) nitrogen and oxygen

b) sulfur and hydrogen

c) silicon and nitrogen

d) oxygen and silicon

Only oxygen and silicon are both included on the list

8 valence electrons.

After filling up all the rings, Xenon has 8 electron in the very outer ring

Answer:

hope thiss will helps u

Explanation:

8 valence electrons

There are a total of 22 valence electrons in the Lewis structure for XeF2. The Lewis structure for XeF2 is a bit tougher since you have to take formal charges into account to find the best Lewis structure for the molecule. Remember that Xenon can have more than 8 valence electrons.

Answer:

c. the number of filled electrons shells increases

Answer:

the answer is c

Answer:

4.98/5 = 0.996 (don't forget to add your units)

Explanation:

Density= Mass/Volume

4.98/5= 0.996 (don't forget to add your units)  

Answer:

niether

Explanation:

Beeswax is neither a mineral nor a rock it is supposed to be a heterogenous mixture.

Minerals are defined as a chemical compound which has a well -defined composition and possesses a specific crystal structure.It occurs naturally in the pure form.

If a compound occurs naturally in different crystal structure then each structure is considered as a different mineral.The chemical composition of a mineral varies depending on the presence of small impurities which are present in small quantities.

Some minerals can have variable proportions of two or more chemical elements which occupy equivalent position in the crystal structure.It may also have variable composition which is split into separate species.

Physical properties of minerals include color,streak, luster,specific gravity and cleavage.

Learn more about minerals,here:

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Answer:

Explanation:

well it needs water like us to stay alive

Answer:

Explanation:

The cryosphere—the portion of the Earth's surface where water is in solid form for at least one month of the year—has been shrinking in response to climate warming. ... The important outcome, however, is the change and the response the human social system (infrastructure, food, water, recreation) will have to that change.

The cryosphere the portion of the Earth's surface where water is in solid form for at least one month of the year has been shrinking in response to climate warming.

The cryosphere includes all of the earth's frozen water, including glaciers and sea ice.

The lithosphere is the solid part of the earth made up of rocks, minerals, and other elements except the ocean. It is the  part which present in the outer part of the earth which includes the brittle upper portion of the mantle and crust. The part of  planet where living things can be found from the upper part of the atmosphere to the lower of the oceans and pools that are thermal and made up of the parts of earth where life present in all ecosystem is known as biosphere.

The atmosphere is the thin layer of gases that covers the outer part of the planet. It gives us the many different climates, or broad way of  weather conditions around the world. The hydrosphere includes all of the water on earth from the oceans to glaciers and underground water and it can be liquid, vapour, or ice.

Therefore, the cryosphere the portion of the Earth's surface where water is in solid form for at least one month of the year has been shrinking in response to climate warming.

Learn more about cryosphere here:

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Answer:

Odessium (Od) has an average atomic mass of 284.45

Explanation:

Average mass is calculated from the isotopes of an element weighted by their relative abundance.

To calculate the relative average mass, you need to find the % of each isotope and use these to calculate the relative average mass

Add all 3 answers to get the relative average mass

Answer:

An atom is the smallest particle of an element that still has the properties of that element. Atoms, in turn, are composed of subatomic particles, including negative electrons, positive protons, and neutral neutrons. The number of protons in an atom determines the element it represent

Explanation:

Answer:

closely packed cells

many cell junctions

Explanation:

Answer:

A,B

Explanation:

EDGE2021

Answer:

I think that As is larger

Answer:

This apparent change in the pitch (or frequency) of sound is called Doppler shift. ... You see these stretched-out light waves as having a lower frequency. Since red is at the low-frequency end of the visible spectrum, we say that light from a receding star is shifted toward red, or red shifted.

Explanation: