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3 years ago

How do you find out mass in science

2 answers:

7 0

Well, we know Newton's second law of motion states that force equals mass times acceleration: F = ma. If you know the net force on the object, and then also it's acceleration, you then can rearrange this formula to find the mass: m = F / a.

I hope this helps! I know I like to have formulas to take note of.
~Brooke❤️

Aliun [14]3 years ago

3 0

Multiply the volume and density together. Multiply your two numbers together, and you'll know the mass of your object. Keep track of the units as you do this, and you'll see that you end up with units of mass (kilograms or grams). Example: We have a diamond with volume 5,000 cm3 and density 3.52 g/cm3

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Predict the reactants of this chemical reaction. That is, fill in the left side of the chemical equation. Be sure the equation y

sammy [17]

Answer:

Ba(OH)₂ + 2 HBr ⇒ BaBr₂ + 2 H₂O

Explanation:

We have the products of a reaction and we have to predict the reactants. Since the products are binary salt and water, this must be a neutralization reaction. In neutralizations, acids react with bases. The acid that gives place to Br⁻ is HBr, while the base the gives place to Ba²⁺ is Ba(OH)₂. The balanced chemical equation is:

Ba(OH)₂ + 2 HBr ⇒ BaBr₂ + 2 H₂O

5 0

3 years ago

Arrange the compounds in order of decreasing magnitude of lattice energy:

Alik [6]

Answer:

The correct answer is CaO > LiBr > KI.

Explanation:

Lattice energy is directly proportional to the charge and is inversely proportional to the size. The compound LiBr comprises Li+ and Br- ions, KI comprises K+ and I- ions, and CaO comprise Ca²⁺ and O²⁻ ions.

With the increase in the charge, there will be an increase in lattice energy. In the given case, the lattice energy of CaO will be the highest due to the presence of +2 and -2 ions. K⁺ ions are larger than Li⁺ ion, and I⁻ ions are larger than Br⁻ ion.

The distance between Li⁺ and Br⁻ ions in LiBr is less in comparison to the distance between K⁺ and I⁻ ions in KI. As a consequence, the lattice energy of LiBr is greater than KI. Therefore, CaO exhibits the largest lattice energy, while KI the smallest.

8 0

3 years ago

The image shows an example of a sedimentary rock.

Pani-rosa [81]

Can I see the image?

5 0

2 years ago

Read 2 more answers

To which group of the periodic table do lithium and potassium belong?

s344n2d4d5 [400]

Answer:

1)alkali metals

2)1g/ml

3) mercury

Explanation:

HEY!!^^

have a good day

thank me later

carryonlearing

6 0

2 years ago

Read 2 more answers

A sample of gas originally at 25 C and 1.00 atm pressure in a 2.5 L container is allowed to expand until the pressure is 0.85 at

aivan3 [116]

Answer:

Final volumeof the gas = 2.84 L

Explanation:

The formular to be used here is the general gas equation. the formular is being used because it gives the relationship between the three gas parameters (volume, temperature and pressure) mentioned.

The general gas equation is given as;

$\frac{P1V1}{T1} = \frac{P2V2}{T2}$

where;

P1 = initial pressure

V1 = initial volume

T1 = initial temperature

P2 = Final pressure

V2 = Final volume

T2 = Final temperature

From the question,

P1 = 1.00 atm

P2 = 0.85atm

T1 = 25C + 273 = 298K (Converting to kelvin)

T2 = 15C + 273 = 288K (Converting to kelvin)

V1 = 2.5L

V2 = ?

from the equation, making V2 subject of formula we have;

$V2 = \frac{T2P1V1}{T1P2}$

V2 = (1*2.5*288)/(298*0.85) = 2.84 L.

5 0

3 years ago