1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
olga55 [171]
2 years ago
12

Pls answer this ASAP thank you

Chemistry
1 answer:
vaieri [72.5K]2 years ago
7 0

Answer:

The anwer is not D the anwer is A

Explanation:

You might be interested in
What is the equation for the average?
s2008m [1.1K]

Explanation:

The equation for the average is: (sum of all data values/ (total number of data values)

4 0
2 years ago
Read 2 more answers
How many grams of tris (mw 121.1) would you need to prepare 100 ml of a 100 mm tris solution? _________ grams?
Tems11 [23]

Molarity = (Mass/ molar mass) x (1/ volume of solution in Litres)

Mass = Molarity x molar mass x  volume of solution in Litres

Molarity of Tris = 100 mM = 0.1 M

volume of Tris sol. = 100 mL = 0.1 L

molar mass of Tris = 121.1 g/mol

Hence,

mass of Tris = Molarity of Tris x molar mass ofTris x volume of Tris solution

= 0.1 M x 121.1 g/mol x 0.1 L

= 1.211 g

mass of Tris = 1.211 g


7 0
3 years ago
Suppose you needed to measure exactly 15.0 mL of water for an
s344n2d4d5 [400]

Answer:

A 50-mL volumetric cylinder with 0.1-mL accuracy scale should be used for this purpose since three significant figures of accuracy are required.

Explanation:

Hello,

A 50-mL volumetric cylinder with 0.1-mL accuracy scale should be used for this purpose since three significant figures of accuracy are required.

Best regards.

6 0
3 years ago
Read 2 more answers
Given a 1.50 Liters of solution that contains 62.5 grams of magnesium oxide. What is the Molarity of that solution? Please show
zhenek [66]
Given:
1.50 L
62.5 grams
and the MM of MgO: 40.31 g/mol

Molarity: mol/L

First, find mol.

62.5 g x 1mole ÷ 40.31 g = 1.55 mol

then divide mol and the given liters

1.55mol ÷ 1.50 L= 1.03 M
3 0
3 years ago
Stars, such as our sun, use fusion to combine hydrogen atoms into helium atoms, and in the process, create energy. As massive st
Zinaida [17]

Hey there! The answer to your first question is SILICON, Nickle has 28 protons, silicon has 14, 14+14=28. Its the only element thats adds up. I dont know about the 2nd one myself.

4 0
2 years ago
Other questions:
  • A metal having a cubic structure has a density of 2.6g/cm³, an atomic weight of 87.62 g/mol, and a lattice parameter of 6.0849 A
    11·1 answer
  • Riya rides his bike 63 miles in 270 minutes. What is his average speed in miles per hour? Be sure to include the equation for sp
    12·1 answer
  • An atom of oxygen (atomic number 8) with an atomic mass of 16 would have how many neutrons?
    10·1 answer
  • Which of the following groups gets energy directly from an insect that it eats?
    6·2 answers
  • What is the balanced chemical equation for the reaction used to calculate ΔH∘f of SrCO3(s)? If fractional coefficients are requi
    10·1 answer
  • What happens to the food as it undergoes this stage​
    8·1 answer
  • Somebody please helppppppppppp
    5·2 answers
  • Write three primary alcohol with the formula C4H8O​
    13·1 answer
  • Which two statements about redox reactions are true?
    5·2 answers
  • 2C4H10+ 13O2→ 8CO2+ 10H2O
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!