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
lys-0071 [83]
3 years ago
6

PLEASE HELP WITH MY CHEM ASSIGNMENT!!!

Chemistry
1 answer:
aalyn [17]3 years ago
6 0

Answer: 209.2

Explanation:

4. q = mcat

    q = 5g(4.184)(40-50)

    q = -209.2

the negative sign indicates that heat is given off

You might be interested in
SOMEONE HELP PLEASE !!
aev [14]

salt is not because it gets u dehydrated

6 0
2 years ago
How many moles of mercury(II) oxide, HgO, are needed to produce 125 g of oxygen, O2? How many moles of mercury is produced?​
iren2701 [21]

Answer: 7.81 mol HgO (How many moles of mercury(II) oxide, HgO, are needed to produce 125 g of oxygen, O2?)

Explanation:

7 0
2 years ago
What type of molecule is the compound shown in the diagram? *diagram included*
koban [17]
Monosaccharides are the simplest carbohydrates. Although glucose and fructose have the same molecular formula they have different structures. They cannot be further hydrolyzed to simple sugars. Disaccharides contains two monosaccharides. For example, lactose and sucrose. Polysaccharides on the other hand contains a large number of saccharides. An example is starch, glycogen and dextrans. Amino acids contains an amino acid, carboxyl group and an R-group. Whatever the diagram you have, you just look at the structures contained.
4 0
3 years ago
Help! I need to finish work. Brainlist will be given to the most helpful!
Soloha48 [4]

Answer:

1. matches with elements.

2. matches with compounds.

3. matches with atoms

4. matches with weight

5. matches with gas

6. matches with carbon dioxide

7. matches with Mendeleev (there's an element named after him)

8. matches with IUPAC

Hope that helped :)

7 0
2 years ago
Two cylinders are made of the same material. Cylinder A is one-fourth (1/4) the length of cylinder B and it has a radius that is
tankabanditka [31]

Answer:

M_{A} : M_{B}  = 4 : 1

Explanation:

Given that:

Volume of a cylinder = \pir^{2}h

For cylinder A, l_{A} = h_{A} = \frac{1}{4} l_{B} and r_{A} = 4r_{B}.

Volume of cylinder A = \pi(4r_{B}) ^{2} × \frac{1}{4} l_{B}

                                   = 4\pir_{B} ^{2} l_{B}

Volume of cylinder B =  \pi(r_{B}) ^{2} l_{B}

                                  =  \pir_{B} ^{2}l_{B}

To determine the ratio of their masses, density (ρ) is defined as the ratio of the mass (M) of a substance to its volume (V).

i.e    ρ = \frac{M}{V}

Thus, since the cylinders are made from the same material, they have the same density  (ρ). So that;

density of A = density of B

density of A = \frac{M_{A} }{4\pi r_{B} ^{2}l_{B}    }

density of B = \frac{M_{B} }{\pi r_{B} ^{2}l_{B}  }

⇒            \frac{M_{A} }{4\pi r_{B} ^{2}l_{B}    }  =  \frac{M_{B} }{\pi r_{B} ^{2}l_{B}  }

The ratio of mass of cylinder A to that of B is given as;

                       \frac{M_{A} }{M_{B} }  =  \frac{4\pi r_{B} ^{2} l_{B}  }{\pi r_{B} ^{2} l_{B}  }

⇒                        \frac{M_{A} }{M_{B} } = \frac{4}{1}

Therefore, M_{A} : M_{B}  = 4 : 1

8 0
3 years ago
Read 2 more answers
Other questions:
  • Describe and explain the chemical reactivity of noble gases
    11·1 answer
  • How many electrons can the px atomic orbital subtype hold?
    6·1 answer
  • Select the most acidic solution from these options. select the most basic (alkaline) solution from these options. select the lea
    9·2 answers
  • When applying monomer liquid and polymer powder nail enhancements, after dipping the brush in monomer liquid and removing the ex
    10·1 answer
  • Which scientist proposed the model of an atom as a solid sphere?
    10·1 answer
  • What does the solid compound, K2SO4, contain?
    6·2 answers
  • What would be the final temperature of a 73.174g sample
    12·1 answer
  • How will the temperature change if you increase the mass of the gas molecules?
    13·1 answer
  • Question 20 (2 points)
    9·1 answer
  • Many of these microscopic organisms are _____, or unicellular.
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!