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Rashid [163]
3 years ago
9

Which of these can be classified as a substance A) oxygen B) carbon dioxide C) air D) acid rain

Chemistry
2 answers:
ratelena [41]3 years ago
4 0

D could be a answer

Julli [10]3 years ago
4 0

Answer:

carbon dioxide

Explanation:

the rest are mixtures

A chemical substance is composed of one type of atom or molecule.

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Al + AgNO3 -> Al(NO3)3 + Ag. As a balanced equation​
prisoha [69]

Answer:

Al + 4AgNO3 >>Al(NO3)3+ 3Ag

Explanation:

the number of moles of No3 of the products is 3 therefore we have to balance the reactants by adding 3 before the "AgNO3" which also leades us to adding 3 mols to Ag on the products side

4 0
2 years ago
If you add a solution of NaOH to a solution of H₂CO₃, two reactions occur, one after the other. Write the chemical equations for
Crazy boy [7]

We have a solution of NaOH and H₂CO₃

First, NaOH will dissociate into Na⁺ and OH⁻ ions

The Na⁺ ion will substitute one of the Hydrogen atoms on H₂CO₃ to form NaHCO₃

The H⁺ released from the substitution will bond with the OH⁻ ion to form a water molecule

If there were to be another NaOH molecule, a similar substitution will take place, substituting the second hydrogen from H₂CO₃ as well to form Na₂CO₃

6 0
2 years ago
This figure (Figure 1)shows a container that is sealed at the top
guajiro [1.7K]
I'm pretty sure the answer is 0.833 atm.

Hope I helped! <3

-cara
7 0
3 years ago
What is the role of roughages in the balanced diet​
ira [324]
Roughage, also known as Dietary fibre is thought to play an important role in digestive health, heart health, preventing Type 2 diabetes, as well as maintaining energy levels.
5 0
3 years ago
What force is necessary to accelerates a 1250kg car at a rate of 40 m/s
zalisa [80]

Answer:

F = 50000 N

Explanation:

The acceleration is rate of change of velocity of an object with respect to time.

Formula:

a = Δv/Δt

a = acceleration

Δv = change in velocity

Δt = change in time

Units:

The unit of acceleration is m.s⁻².

Acceleration can also be determine through following formula,

F = m × a

a = F/m

Given data:

Mass of car = 1250 Kg

Acceleration = 40 m/s².

Force = ?

Solution:

F = m × a

F = 1250 Kg ×  40 m/s²

Kg.m/s² = N

F = 50000 N

8 0
3 years ago
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