The primary unit of length in the metric system is the ?

Answers

Answer 1

Answer:
meter is the primary unit of length in the metric system.

Answer 2

Answer: kg (killigram) for mass
L (litter) volume
m (meter) length

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Find the pH of the following solution. 1.2 L of a solution containing 5.0x10^-4 grams of hydrobromic acid.

Answers

The HBr is a strong acid, that is, it is fully consumed in the reaction

molar mass HBr = 80.91 g/mol

number of moles = 5.0 x 10⁻⁴ / 80.91 = 6.17 x 10⁻⁶ moles

molarity = 6.17 x 10⁻⁶ / 1.2 = 5.14 x 10⁻⁶ M

HBr ------------------- H₃O⁺ +   Br ⁻
↓   ↓   ↓
  5.14 x 10⁻⁶ 0   0
- 5.14 x 10⁻⁶   5.14 x 10⁻⁶   5.14 x 10⁻⁶
_____________________________________
0   5.14 x 10⁻⁶ M   5.14 x 10⁻⁶ M

PH = - log [ H₃O⁺ ]

PH = - log [ 5.14 x 10⁻⁶ ]

PH = 5.82

What is the difference between a homogeneous and a haterogeneous mixture

Answers

a homogeneous mixture has the same uniform appreance, and composition throughout. heterogeneous mixture consists of visibly different substances or phases, that would be your answer to that question.

Fluorine (F) and bromine (Br) are in the same group on the periodic table. How do atoms of these elements compare when they form bonds?

Answers

Answer:

they both gain one electron

Explanation:

they are both halogens and they each have one unpaired electron so that unpaired electron join together to make them form a bond

Answer:

Explanation:

Which of the gases listed below would not be collected via water displacement?a. CO₂
b. CH₄
c. O₂
d. NH₃
e. H₂

Answers

D is the answer I do believe

The answer is D) NH3

In a closed container, the vapor pressure of 10 mL of ethanol at 20 degrees C is 5.85 kPa. What is the vapor pressure of 20 mL of ethanol at the same temperature?

Answers

Answer:

${P_2}=2.925\ kPa$

Explanation:

At same temperature and same number of moles, Using Boyle's law

${P_1}* {V_1}={P_2}* {V_2}$

Given ,

V₁ = 10 mL

V₂ = 20 mL

P₁ = 5.85 kPa

P₂ = ?

Using above equation as:

${P_1}* {V_1}={P_2}* {V_2}$

${5.85\ kPa}* {10\ mL}={P_2}* {20\ mL}$

${P_2}=\frac{{5.85}* {10}}{20}\ kPa$

${P_2}=2.925\ kPa$

Would the remains of a living thing have more or less carbon 14 in it after being buried for 10000 years? Why? Please make the answer no more than 5 sentences

Answers

Yes, because carbon-14 is radioactive and so decays over time. if it is buried, it cannot take up more carbon-14, so the overall c14 levels wil go down.

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