HELP ASAP!!! please chemistry sucks

Answer: 6.75 g

Explanation:

Answer:

You will more than likely fall or get pushed back a little

Explanation:

Answer

Depends on if you're good on a skateboard or not.

Explanation:

If you're good: Then you wont fall

If you're bad: Then you might fall

Can't tell if this is an actual school question or not, lol

But I hope it helps, :)

Answer: nitrogen

Explanation:

Answer:

m = 1 gram

Explanation:

Given that,

Heat, Q = 84 J

The temperature increases from 10°C to 30°C.

We need to find maximum number of grams of liquid water. We know that the heat required is given by :

[tex]Q=mc\Delta T[/tex]

c is specific heat of water, c = 4,200 J/kg°C

Use the above formula to find m. So,

[tex]m=\dfrac{Q}{c\Delta T}\\\\m=\dfrac{84}{4,200\times (30-10)}\\\\m=0.001\ kg[/tex]

or

m = 1 gram

So, the required mass is 1 gram.

Answer:

CFC’s illustrate that technical advances can be a “double-edged” sword as CFC's were made for the advantages but soon or later it came as a disadvantage for environment.

CFC's was discovered with many advantages such as they are stable, non-corrosive, and replacement of harmful ammonia used in refrigerators  and air conditioning systems. But soon it is also discovered that CFC's are destroying  the upper atmosphere layer called ozone, which is a very big disadvantage for us. CFCs are major contributor  to global warming after carbon dioxide.

Hence, it proves that CFC’s shows how technological advancement can be “double-edged” sword.

Answer:

The answer is A and C

Answer:

At < I < Br < Cl < F

Explanation:

Electronegativity is defined as the ability of an atom to attract pair of electrons. On the periodic table, electronegativity decreases down the group and increases along the period.

The given atoms belong to the same group, so following the above rule,  F has the highest electronegativity than other given atoms as it is at the top of the group and At will have the least electronegativity as it is at the bottom of the group.

Hence, the order of increasing electronegativity is

At < I < Br < Cl < F.

Answer:

310.176722 grams

You can view more details on each measurement unit: molecular weight of Calcium Phosphate or grams The molecular formula for Calcium Phosphate is Ca3(PO4)2. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Calcium Phosphate, or 310.176722 grams.

Answer:

Its just C

Also because its infront of the sun

Answer:

Explanation:

1 mol of any chemical is 6.02 * 10^23

x mol of any chemical is 6.31 * 10^24

You should look at this before you put it in  your calculator. You should think roughly 10.

Now you can set it up as a proportion

1/x = 6.02 * 10^23/6.31 * 10^24        Cross multiply

6.02 * 10^23 x = 1 * 6.31 * 10^24      Divide by 6.02 * 10^23

x = 6.31 * 10^24 / 6.02 * 10^23

x = 10.48 mols.

Answer:

it is the  Sparta ruined Athens’s farmland to try to get Athens to fight on farm land

Explanation:

just did

Answer:

the answer is B

Explanation:

Balancing Chemical Formulas is like simple mathematic systems of equations

Lets look at your second example:

H2 + Cl2 = HCl

Lets replace H with x, and Cl with y.

the equation would now be

2x + 2y = xy (now I know in math x+y does not equal xy, but bear with me)

This would not be correct. For the equation to be true, both sides must yield the same counterpart. To do this, you'd have to add a coefficient to balance out both sides.

Looking at the equation, you know you have to balance the right side, as the left side is adding two things up to getting only half value. So, we will add coefficient of "2" to xy. This means that the balanced chemical equation will now be H2 + Cl2 = 2HCl

id say physical cause your changing the physical form of the molucles

Answer:

the answer is d

Explanation:

Artificial selection may have unintended consequences that can reduce the benefits of a species to humans or limit its function. Therefore, the correct option is option D.

Growing and rearing livestock and plants for human use was one of the greatest important milestones in the advancement of the human species. Techniques have been developed over time to increase crop yields and generate animals with the best qualities. It is known as artificial selection. These beneficial characteristics gradually take over the population.

Artificial selection refers to the selective breeding practises used by humans to select for desirable qualities in organisms and pass those traits on to their offspring. Artificial selection may have unintended consequences that can reduce the benefits of a species to humans or limit its function.

Therefore, the correct option is option D.

To know more about artificial selection, here:

https://brainly.com/question/21618199

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Answer:

ammonium phosphite

Answer:

Explanation:

Magnetic fields can be measured in various ways. If this device, called a dip meter, is first aligned in the direction of the magnetic meridian as defined by a compass, the needle lines up with the total field vector and measures the inclination angle I

Answer:

lone pairs. pairs of valence electrons that are not involved in covalent bond formation, unshared pairs of electrons.

Explanation:

Answer:

Epsom salt is magnesium sulfate.

Alkaline earth metal, which is also sold in other products like milk of magnesia and Epsom salt magnesium sulfate and magnesium hydroxide.

The elements that make up group 2 of the current periodic table are the alkaline earth metals. Beryllium, magnesium, calcium, strontium, barium, and radium are among the elements in this group.

The physical and chemical characteristics of the elements in this group are quite similar. However, they are not often encountered in their elemental forms in nature.

Beryllium and radium are the first two elements in the second group of the periodic table, which is made up of the alkaline earth metals. They are all glossy, silvery-white metals with good reactivity, albeit not as good reactivity as the alkali metals.

Thus, alkaline earth metal is the components of Epsom salt ​are  magnesium sulfate and magnesium hydroxide.

To learn more about alkaline earth metal, follow the link;

https://brainly.com/question/12835232

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Answer:

6.022x10^23

Explanation:

Avogrado's number proved that one mole is equal to 6.022x10^23.

Answer:

19.8% of Nitrogen

Explanation:

In the Al(NO₃)₃ there are:

1 atom of Al

3 atoms of N

And 9 atoms of O

The molar mass of Al(NO₃)₃ is:

1 Al * (26.98g/mol) = 26.98g/mol

3 N * (14g/mol) = 42g/mol

9 O * (16g/mol) = 144g/mol

26.98 + 42 + 144 = 212.98g/mol

We can do a conversion using these molar masses to find the mass of nitrogen is the sample, that is:

2.57g * (42g/mol / 212.98g/mol) =

0.51g N

Percent composition of nitrogen is:

0.51g N / 2.57g * 100

= 19.8% of Nitrogen

Answer:

86

Explanation:

20 plus 9 equals 29 minus 10 equals 19 plus 67 equals 86

Answer:

86

Explanation:

20+9=29

29-10=19

19+67=86

Answer:

True

Explanation:

.

Answer:

Explanation:

Mount Vesuvius is considered to be one of the most dangerous volcanoes in the world because of its proximity to the city of Naples and the surrounding towns on the nearby slopes. The volcano is classed as a complex stratovolcano because its eruptions typically involve explosive eruptions as well as pyroclastic flows

Answer:

a. 10⁻² > 10⁻³

b. 10⁻¹⁴ < 10¹

c. 10⁻⁷ = 0.0000001

d. 100 > 10¹

Explanation:

We can rewrite those numbers as 0.01 and 0.001. That way the answer becomes clearer.

Any positive number with a negative exponent will be less than 1.

In the decimal, the 1 is exactly 6 zeros away from the dot, meaning the 1 is in the seventh place.

10¹ is equal to 10.