3 years ago

Answers for cardiovascular system crossword puzzle

Chemistry

2 answers:

Aleks [24]3 years ago

7 0

Here the answers now brainlest

KengaRu [80]3 years ago

5 0

I dont know the answer

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A piece of wood near a fire is at 23°C. It gains 1,160 joules of heat from the fire and reaches a temperature of 42°C. The speci

Molodets [167]

Answer:

35.578g or 36g if you round

Explanation:

Q=mc ∆∅ where ∅ is temperature difference

1160= m x 1.716 x (42-23)

m = 1160/ 1.716 x19

m=35.578g

m = 36g to nearest whole number

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3 years ago

3.<br> what is the relationship between a coefficient; chemical formula

Novosadov [1.4K]

The coefficient in a chemical formula represents the amount of each chemical present. The amount of a substance is measured in moles.

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NNADVOKAT [17]

You multiply 32 by 2, since there are two hydrogens in every water molecule.

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Calculate the amount of oxygen gas collected by the displacement of water at 14◦C if the atmospheric pressure is 790 Torr and th

zhannawk [14.2K]

Answer : The amount of oxygen gas collected are, 0.217 mol

Explanation :

Using ideal gas equation :

$PV=nRT$

where,

P = pressure of gas = $(790-12)torr=778torr=1.02atm$ (1 atm = 760 torr)

V = volume of gas = 5 L

T = temperature of gas = $14^oC=273+14=287K$

n = number of moles of gas = ?

R = gas constant = 0.0821 L.atm/mol.K

Now put all the given values in the ideal gas equation, we get:

$(1.02atm)\times (5L)=n\times (0.0821L.atm/mol.K)\times (287K)$

$n=0.217mole$

Thus, the amount of oxygen gas collected are, 0.217 mol

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3 years ago

Which best represents a reaction mechanism?

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The reaction that would beat represent a typical reaction mechanism is when A and B react with each other to produce certain products.

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