mg(s) + 2hcl(aq) mgcl2(aq) + h2(g)

Please give me a real answer please! ​

Answer:

29 grams

Explanation:

At 20°C, a saturated solution of sodium nitrate (NaNO3) contains 86 grams of solute in 100 m of water.

This means the solubility of NaNO3 at  20°C is 86 g/100 ml of water

The solubility of NaNO3 at 50 °C is 115 grams of NaNO3/100 ml of water.

Therefore; to get the amount of sodium nitrate must be added to saturate the solution at 50°C;

We subtract the solubility at 20°C  from the solubility at 50 °C

That is; 115 g/100 ml of water - 86 g/100 ml of water

         = 29 grams of NaNO3

Answer:

copy and paste here ill do it

Answer:

b molecular orbital therory

Answer:

1/8

Explanation:

[tex] \frac{1}{ {2}^{3} } = \frac{1}{8} [/tex]

Mark brainliest please

Answer:

Density 0.78945 g/cm3 (at 20 °C)

Melting point −114.14 ± 0.03 °C (−173.45 ± 0.05 °F; 159.01 ± 0.03 K)

Boiling point 78.23 ± 0.09 °C (172.81 ± 0.16 °F; 351.38 ± 0.09 K)

Solubility in water Miscible

Explanation:

mark brainliest

Answer: C: Sodium donates an electron to chlorine.

Explanation:

Sodium wants to lose an electron and chlorine wants to gain an electron to become stable. This is because of their place in the periodic table, sodium being on the very left edge and chlorine on the very right (noble gasses dont count as they are stable to begin with)

Therefore sodium will donate to chlorine so they both become stable with an ionic bond. (another way to tell its ionic is the very large difference in electronegativity)

When table salt forms, sodium donates an electron to chlorine resulting in the formation of bond which is formed when the electronic configurations become stable.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

Learn more about electronic configuration,here:

https://brainly.com/question/13497372

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Answer:

hard to find

Explanation:

Answer:

because actually diamonds is coal.

Explanation:

how diamonds is coal? because when the coal gets very high pressure it turns into diamonds.

Answer: Is it Conduction?

Explanation:

Answer:

Ok for the question you can make up your own

If you can't make up your own tell me so I can try my best to come up with questions

1. Answer: Since and last are adverbs so am not sure how that part going to go

Type of Adverb for since is: Time

Type of Adverb for last is : Time

2. Question:

Answer: happily

Type: Manner

Hopes this helps you.

Answer:I believe it is Subatomic Particle.

Answer:

Explanation:

A thawed turkey can remain in the refrigerator for 1 to 2 days. If necessary, a turkey that has been properly thawed in the refrigerator may be refrozen.

...

Thawing Your Turkey.

Thawing in cold water            Time to thaw (allow 30 minutes per pound)

16 to 20 pounds                    8 to 10 hours

20 to 24 pounds                    10 to 12 hours

Answer:

C2H4O2

Explanation:

Answer:

Composition of matter

Answer: a. Accuracy  how close is your measurement tot the true value

Explanation:

Which one of the following is a measure of the certainty of a

result comparing to a given value or the agreement of

measurements?

a. Accuracy  how close is your measurement tot the true value

b. precision; how close are yourr measurements to each other

c. Percentage: the ratio of tour measurement to the true value X 100

d. Uncertainty: how unsure are you of your measurements

Answer:

129 units cubed

Explanation:

There are ten spaces between 120 and 130, so we can infer that each line represents a change in volume of 1 unit. The volume of the substance in the graduated cylinder looks like it's 1 under 130, so its volume is 129 units.

Hopefully this was helpful! :)

Answer:

Explanation:If the products of a reaction have higher energy than the reactants, then the reaction...

Answer:

Explanation:

According to Newton's third law of motion, forces always act in equal but opposite pairs. Another way of saying this is for every action, there is an equal but opposite reaction. ... When one object exerts a force on another object, the second object exerts the same size force on the first object

the answer is B

Answer:

C. Another force occurs that is equal in size and opposite in direction

Explanation:

According to Newton's 3rd Law of Motion, if a force is exerted on an object, how does the other force occur?

A.Another force occurs that is in the same direction and at the same speed.

B. Another force occurs that is in the same direction and is the same size.

C. Another force occurs that is equal in size and opposite in direction

D. Another force occurs that is equal in speed and opposite in direction.

NEWTON SAID "FOR EVERY ACTION, THERE IS AN EQUAL AND OPPOSITE REACTION"

Answer:

Use calculator but first group them one by one and open the bracket by solving them accordingly

The number we get by this operation is 0.016. This number can be taken based on the rules for significant figures.

The number of significant figures is the number of digits that are known with certainty plus the last one having some uncertainty. All non zero values are significant and zero preceding first non zero digit is not significant .

For example in 65000, there are only two significant figures.  Similarly in 0.08 only one significant digit is present. Now when we multiply two decimal numbers, the result can only have as many decimal places as there are in the value with fewest decimal places.

First, multiply the numbers inside the bracket.  As per the above rule, the result should contain only two decimal places.

(0.08 ×200×0.004) = 0.06

Multiply by 65000 - 0.06×65000 = 3900

Now divide it by the multiplication product (800× 300), 240000 we get as follows:

3900÷240000 = 0.016

Hence the result of this operation is 0.016.

To learn more about significant figures, refer the link below:

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Answer:

1.04

Explanation:

Answer:

51.842/2.1 g/mL

Explanation:

the volume of the irregular object= 19.8 - 17.1 =2.7 mL

the density if the irregular object= mass ÷ volume = 51.842 ÷ 2.1 = 51.842/2.1 g/mL

Answer:

The average kinetic energy increases, and the particles collide more frequently.

Explanation:

Answer:

see this

Explanation:

Explanation:

Hydrochloric acid does not consider as organic acid because of the absence of carbon in it.

hope it helps

Answer:

7.20 X 10^-2 gm

Explanation:

Aqueous hydrobromic acid HBr will react with solid sodium hydroxide NaOH to produce aqueous sodium bromide NaBr and liquid water H2O. Suppose 3.24 g of hydrobromic acid is mixed with 2.3 g of sodium hydroxide. Calculate the maximum mass of water that could be produced by the chemical reaction. Be sure your answer has the correct number of significant digits.

HBr(aq) + NaOH (S)-----------> NaBr (aq) + H20

mol wt  of HBr = 1 + 79.9  = 80.9

3,24 gm of HBr = 3.24/80.9 = 0.00400moles = 4.00 X 10^-3 moles

mol wt of NaOH =  23.0 + 16.0 +1.01 = 40.0 gm

2.3 gm = 2.3/40.0 = 0.058 moles =5.8 X 10^-2

the reaction of HBr and NaOH is 1:1.  

there are not enough moles of HBr to neutralize all of the NaOH. so

only 4.00X10 ^-3  moles of H2O can be produced

mol weight of H2O is (2 X 1.01) + 16.0 = 18.0

The maximum mass of H2O that can be produced is

18.0 X 4.00X10^-3 = 72.0/1000 =7.20 X 10^-2 gm

Answer:

Compounds are pure substance consisting of two or more different atoms

Answer:

I hope this help

Explanation:

pls brainliest

Answer:

D looks right to me, but if I'm wrong then sorry

Answer:

There are 10 neutrons

Explanation:

Because the atomic number is 8 and the isotope number is 18 (which is the collective protons and neutrons), we can do

18-8=10

Answer:

10

Explanation:

8 proton because it is oxygen

10 neutron because 18-8

1227.6

Explanation:

po ang sagot khit i calculate nyo